Oregon® Mechanical Timber Harvesting Handbook Introduction

Our handbook provides information we consider critical to the performance (defined as production, reliability, and life of operation) and safe use of Oregon Harvester Cutting Systems. A Harvester saw chain based cutting system is composed of a drive sprocket, guide bar, and a loop of saw chain, that is not hand-held, and designed to work with mechanical harvester machines. In offering this information, we do not assume any responsibility for the design or manufacturer of equipment, nor the content of the literature supplied.

Safety Symbol This safety symbol is used to highlight safety messages. When you see this symbol, read and follow the safety message to avoid severe personal injury. Table of Contents

Introduction Key Safety Information...... 1 – 4 • Chain Shot Warning...... 1 • How Chain Shot Happens...... 2 • Minimizing the Risk of a Chain Shot Event...... 3 • Operator, Ground Personnel, and Bystander Safety ...... 3 • Guard and Shields...... 3 • Windows...... 4 • A Cutting System...... 4 Chain Catcher...... 5 Chain Shot Guard ...... 5

Operational Recommendations Operational Parameters, Service Life, and Safety...... 7 Technical Data...... 7 – 8 Lubrication...... 8 – 9 Chain Tension ...... 9 – 10 Saw Chain Speed...... 12 Installation and Break-In...... 13 Best Practices ...... 14 • Daily Inspections ...... 14 • Replacement Schedule ...... 14 • Use Sharp Chain ...... 14 • Cutting Safety...... 15

Saw Chain Terminology...... 19 – 21 • Saw Chain Pitch...... 19 • Saw Chain Gauge...... 19 • Parts of a Cutter...... 20 • Parts of Saw Chain...... 20 • How a Cutter Works ...... 20 Oregon® Harvester Saw Chain • 18HX...... 21 – 22 • 19HX...... 23 - 24 • 11H ...... 25 – 26 • 11BC...... 27 – 28 Saw Chain Maintenance Saw Chain Maintenance...... 29 – 30 • Clean...... 29 • Inspect ...... 29 • Discard...... 29 • Repair...... 35 • Clean and Lubricate...... 30 Sharpening and Maintenance...... 31 – 38 • Filing and Grinding Angles...... 31 • Optional Sharpening Angles...... 32 Sharpening and Maintenance Tools...... 33 – 34 • Multi-Purpose Tool Functions...... 34 • Sharpening Saw Chain with a Round File...... 35 • Sharpening Saw Chain with a Grinder ...... 36 • Setting the Vise Assembly...... 36 Grinding Wheels...... 37 • Vitrified Grinding Wheels...... 37 How to Set Depth Gauges...... 38

Saw Chain Repair How to Break Out Rivets ...... 39 Joining Saw Chain...... 40 – 42 Saw Chain Troubleshooting ...... 43 – 50 • Cuts Slow, Cuts Rough, or Won’t Hold an Edge ...... 43 – 45 • Cutters or Tie-Straps Wear Heavily or Break ...... 46 • Drive Links Wear Heavily or Break...... 47 – 48 • Sharpening Drive Link Tangs ...... 49 • Saw Chain Has Tight Joints...... 49 • Saw Chain Cuts Crookedly/Leans to One Side/Cuts Unevenly. . . . 50

Guide Bars Understanding Bar Part Numbers...... 53 Guide Bar Types ...... 54 – 55 Bar Noses...... 56 Guide Bar Mount Types and Drive Sprocket Tooth Counts...... 56 – 70 • .404"-Pitch Guide Bar Mounts...... 57– 61 • .404"-Pitch Jet-Fit® Guide Bar Mounts...... 62 – 63 • 3/4"-Pitch Guide Bar Mounts ...... 64 – 78 • 3/4"-Pitch Symmetrical Two-Ended Guide Bar Mounts...... 73 • 3/4"-Pitch Asymmetrical Double-Ended Mounts...... 74 - 75 Guide Bar Maintenance Basic Guide Bar Maintenance Tasks...... 77 – 78 Replacing Nose Sprockets on HS Harvester Guide Bars...... 79 – 80 Replacing Nose Sprockets with Replacement Nose Kits on RH, SM, and SN Harvester Guide Bars...... 81-82

Guide Bar Troubleshooting Guide Bar Rail Conditions ...... 83 – 86 Guide Bar Nose Conditions...... 87 – 88 Guide Bar Mount Conditions...... 89 Jet-Fit® Guide Bar Mount Conditions ...... 90

Drive Sprockets Drive Sprocket Types...... 91-93 HarvesterLok® Information...... 93 Common Drive Shaft Configurations – .404"...... 94 Drive Sprocket Alignment...... 95-96 Troubleshooting Drive Sprockets...... 97 Hydraulic Pump Information ...... 98 Notes...... 99-101 Key Safety Information

Chain Shot

WARNING: There is risk of serious injury or death to the machine operator, ground personnel and bystanders from chain shot. A Chain Shot Event (CSE) occurs when a piece or pieces of cutting chain from the end of a broken saw chain in mechanized timber harvesting or processing is ejected at a high velocity. Chain shot typically originates near the drive end of the cutting system but can also originate from the guide bar tip area. Saw chain pieces usually travel in the cutting plane of the guide bar, but can deviate to either side (see illustration below). Although the "Shot Cone Zone" reflects the most likely chain shot path, deflections can occur, substantially expanding where chain pieces may travel. To minimize risk, operators should keep out of the Shot Cone Zone, ground personnel and bystanders should be at least 230 feet away from cutting operations and out of the Shot Cone Zone.

SHOT CONE ZONE SHOT CONE ZONE

1 Mechanical Timber Harvesting Handbook Key Safety Information

How Chain Shot Happens

1 . The saw chain breaks

2 . After a saw chain break, the “free” end of the saw chain begins to whip away from the break .

3 . If the saw chain is not contained by the saw box or a chain shot guard, the broken saw chain’s free end can speed up rapidly, carrying immense dynamic energy . 4 . At the peak of the whip, saw chain pieces may break loose and be ejected at high speed .

Mechanical Timber Harvesting Handbook 2 Important Safety Information

Minimizing the Risk of a Chain Shot Event To minimize your risk of a chain shot event: • You should follow the recommendations of your equipment manufacturer and those contained in this handbook . • Your machine should be equipped with appropriate window enclosures, chain catchers, chain shot guards, and snow holes (shielded or closed) near the cutting system on the saw box . Never use saw chain that has: • Broken, cracked, or damaged components . • Excessive saw chain stretch . • Loose rivet joints (if the rivet rotates, the joints are too loose) . Operator, Ground Personnel, and Bystander Safety • Never engage in a cut with yourself, ground personnel, or bystanders in the Shot Cone Zone (see pages 1 for complete illustration) . • Always cut as close to the ground as possible to reduce the distance that any potential ejected pieces could travel . Guards and Shields • Equipment should be equipped with appropriate guards, shields, and window enclosures to minimize the exposure of the operator, ground personnel, and bystanders to the cutting plane and Shot Cone Zone of the cutting system . • Ground personnel and bystanders should comply with the setback requirement defined by your equipment manufacturer (at least 230 feet or 70 meters) .

3 Mechanical Timber Harvesting Handbook Important Safety Information

Windows • The glazing of the operator's enclosure window should comply with local codes for impact resistance . The glazing should be replaced if any scratches (or other damage) obstructs the operator's effective viewing of the cutting operation . • It should be noted that the UV portion of the light spectrum degrades the properties of polycarbonates (i .e . through time your protection decreases) . Consult your equipment manufacturer or replacement glazing supplier for recommended replacement interval . • Before upgrading, always check with your equipment manufacturer as it may change the operational integrity of the operator enclosure . Cutting System A saw chain based cutting system is composed of a drive sprocket, guide bar, and a loop of saw chain. • The illustration below is a representation of the drive end of a cutting system and how the chain catcher and chain shot guard interrelate . • Every equipment operator should be aware of the safety equipment that should always be present in the saw box . Consult your equipment manufacturer if any of these devices appear damaged or are missing .

Direction of chain travel

Drive sprocket Bar groove Chain catcher Guide bar Chain shot guard

Mechanical Timber Harvesting Handbook 4 Important Safety Information

Chain Catcher A chain catcher prevents a saw chain that has escaped from the bar groove from being “thrown” from the saw box . Chain catchers resemble a sturdy spool and are placed in line with the drive sprocket . A small gap on one side of the chain catcher allows installation and removal of the saw chain .

Chain catcher

Chain Shot Guard A chain shot guard is a piece of material mounted behind the drive sprocket; it performs two functions: 1 . It absorbs the energy of a broken saw chain coming into contact with the saw box, reducing the risk of ejected parts during a chain shot event . 2 . It acts as an extension of the saw box, reducing the risk of a thrown loop of saw chain (or saw chain parts) escaping the saw box .

Chain shot guard

5 Mechanical Timber Harvesting Handbook Operational Recommendations

Mechanical Timber Harvesting Handbook 6 Operational Recommendations

Cutting Systems Operational Parameters, Service Life, and Safety. Recommendations for saw chain speed and guide bar feed load (listed in our Technical Data tables) are intended to provide a balance between performance and cutting system life .

WARNING: Exceeding recommendations may result in cutting system wear and shorter service life . Exceeding recommendations may increase the potential for chain shot events and potential injury or death . At no time should you exceed recommended maximum chain speed .

Technical Data (English Units) Oregon Saw Chain Part .404" Pitch 3/4" Pitch Number 18HX 19HX 11BC 11H

Operating Parameters Guide bar/saw chain oil oz./cut 0.1 0.1 0.4 0.4 Power, hp min/max 5/65 20/65 5/90 10/100 Force on guide bar to tension 110 110 150 150 saw chain, lbs.

Guide Bar Feed Load, at Center, lbs. Min/max 30/200 30/200 30/300 30/300 Recommended 150 150 200 200

Saw Chain Speed, Ft./Min Min/max 3000/8000 3000/8000 1500/7000 1500/7000 Recommended 8000 8000 6000 6000

7 Mechanical Timber Harvesting Handbook Operational Recommendations

Technical Data (Metric Units) .404" Pitch 3/4" Pitch Oregon Saw Chain Part Number 18HX 19HX 11BC 11H Operating Parameters Guide bar/Saw chain oil mL/cut 3 3 10 10 Power, at saw motor kW min/max 5/50 15/50 5/65 5/75 Force on guide bar to tension saw chain, N 490 490 668 668

Guide Bar Feed Load, at Center, N Min/max 100/900 100/900 100/1300 100/1300 Recommended 700 700 900 900

Saw Chain Speed, m/sec Min/max 15/40 15/40 10/35 10/35 Recommended 40 40 30 30

Lubrication Your cutting systems operates in challenging environments and depend on sufficient lubrication to minimize wear and extend the life of operation . Both bar and chain oils and grease can provide adequate lubrication to the cutting system when used correctly . When using grease, ideal settings can vary based on temperature and other work-site conditions . Always begin by consulting your manufacturer’s recommendations . Regular inspection of your cutting system will let you know if any adjustments are needed . • Both hydraulic fluid and used motor oil are not approved lubricants and their use can the warranty of your cutting system . • Hydraulic fluid does not provide sufficient properties for preventing wear of your cutting system . • Used oils may contain acidic compounds and abrasive particles that can compromise the cutting system's effectiveness and increase wear .

Mechanical Timber Harvesting Handbook 8 Operational Recommendations

At startup: • Adequate time must be allowed for your lubrication to reach your cutting system . In cold weather, or when using a new guide bar or saw chain, your system will require additional time . Follow these guidelines: • Run the saw chain slowly while cycling the guide bar until lubricant can be observed leaving the tip of the guide bar . • With oil-based lubrication systems, ensure a fine screen is installed in the fill port to minimize debris . • Use a light/winter-weight lubricant . If possible, increase your per-cut flow rate . • Some oiling systems can actually deliver less oil when the control is simply 0° C -32° F “turned up,” beyond a certain point . This is especially the case with fixed displacement, frequency/pulse type systems . • If the pulses are set to occur too frequently, it is possible that the oil doesn’t have a chance to flow into the pump cylinder before it is cycled . • If your equipment has this type of system, always visually verify correct lubrication on the cutting system after making changes . • Periodically cycle the cutting system without cutting (air cuts) in order to increase the amount of lubricant present and to ensure the system is working . Chain Tension Exceeding recommendations will shorten your cutting system’s life of operation . The recommended amount of force applied by the guide bar to tension saw chain: • .404"-pitch saw chain is 110 pounds (490 N) . • 3/4"-pitch saw chain is 150 pounds (668 N) .

9 Mechanical Timber Harvesting Handbook Operational Recommendations

Manual Tensioning Systems • Saw chain should be tight enough to pull the chassis of the saw chain firmly against the perimeter of the guide bar . • Tension needs to be checked regularly . • Only tension saw chain when it is cool . Steel expands when hot and contracts as it cools . As a result, it could cause damage to your guide bar or saw motor if tensioned when hot . • At shut down or breaks, relieve saw chain tension to prevent damage to the cutting system (saw motor, bar tip, saw chain chassis) as the saw chain cools and contracts . • In cold weather, maintain proper tension . Check tension often with manual tensioning systems . Checking Tension To check for proper tension, grasp the saw chain at the mid-span of the guide bar and pull the saw chain away from the bar rails . • For hard nose guide bars, the drive link tangs should nearly come out of the bar groove . • For sprocket nose guide bars, the saw chain chassis should come out of the bar groove/away from the bar rails approximately 1/8 inch ( approximately 3 mm) . When released, the chassis should snap back against the bar rails .

1/8"

Mechanical Timber Harvesting Handbook 10 Operational Recommendations

Automatic Tensioning Systems An automatic tensioning system is the most effective means to keep proper saw chain tension, especially if it is designed to compensate for the saw chain’s high speed around a guide bar (the saw chain will lengthen as its speed increases) . The system can be optimized to respond to the changing loop length as your saw chain goes from rest, to full speed, to rest . As your saw chain speeds up, your guide bar will need to move forward to maintain proper tension . Otherwise, tension will decrease as much as 50 percent and can result in a thrown loop of saw chain . As your saw chain slows to a rest, the chain will decrease in length, and the guide bar will need to move back . Otherwise, the excessive tension will potentially damage your cutting system . Refer to our Technical Data Tables (page 7) for the recommended amount of force applied to the guide bar to properly tension your saw chain .

11 Mechanical Timber Harvesting Handbook Operational Recommendations

Saw Chain Allowable Spindle RPM

RPM RPM (.404" Pitch) (3/4" Pitch) Drive Sprocket Teeth Maximum Recommended Maximum 7 - 6500 7600 8 - 5700 6700 9 13100 5100 5900 10 11800 4500 5300 11 10700 4100 4800 12 9800 3800 4400 13 9000 3500 4100 14 8400 3200 3800 15 7800 3000 3500 16 7300 - - 17 6900 - - 18 6500 - - 19 6200 - - 20 5900 - - 21 5600 - - 22 5300 - -

• Recommended and Maximum .404" saw chain speed: 8000 ft/min (40 .64 m/s) • Recommended 3/4" saw chain speed: 6000 ft/min (30 .48 m/s) • Maximum 3/4" saw chain speed: 7000 ft/min (35 .56 m/s)

Mechanical Timber Harvesting Handbook 12 Operational Recommendations

Installation and Break-In

The critical time for saw chain occurs during the break-in period for a new (or newly sharpened) saw chain . We recommend transporting your new (or newly sharpened) saw chain to the job site in a container with lubricant . Leave them in the container until they are needed . • If you do not transport your saw chain as suggested above, then lubricate your saw chain prior to use . After installation, increase the saw speed gradually for the first 2 to 4 minutes of running while cycling the guide bar . Do this until you observe lubricant leaving the tip of the guide bar .

For manual tensioning systems, check and adjust as necessary .

1/8"

13 Mechanical Timber Harvesting Handbook Operational Recommendations

Best Practices

Daily Inspections Check your safety devices at least once per shift : • Chain shot guard • Chain catcher • Shields on snow holes • Windows • Cutting system

Run chain and guide bar in sets to equalize wear across the cutting system . Replacement Schedule .404" Pitch • 1-2-10 (1 drive sprocket, 2 guide bars, 10 loops of saw chain) . 3/4" Pitch • 1-2-6 (1 drive sprocket, 2 guide bars, 6 loops of saw chain) . Use Sharp Chain Replace saw chain at least once or more per shift . Maintaining sharp chain on the cutting system will pay off in many ways: • Sharp chain cuts faster . • Less energy (pressure and time) overall is used to complete a cut, so wear on the entire cutting system is reduced . A slightly dull chain can be lightly sharpened instead of needing to be ground back significantly . It is best to lightly sharpen a slightly dull chain often to provide more and faster cuts . Replace the saw chain at least once per shift . This can vary significantly with the type of timber being cut, the terrain, and other environmental factors . If the cuts are getting slower, it’s worth the time to get out of the cab and exchange the chain for a sharp one .

Mechanical Timber Harvesting Handbook 14 Operational Recommendations

WARNING: There is risk of serious injury or death to the machine operator, ground personnel and bystanders from chain shot . Do not exceed our recommendations for saw chain speed, feed‑force, lubrication, tension, and maintenance .

Cutting Safety • Ensure you and all other personnel are clear of the Chain Shot Zone (see pages 1) . • Always cut as close to the ground as possible . This should reduce lubricant mist and wood chip dust on the cab and radiators, reduce timber cracking during cut-to-length processing, and reduce the range of any broken cutting system components .

Notice: Following these best practices consistently will increase your safety and the life of your cutting system .

15 Mechanical Timber Harvesting Handbook Mechanical Timber Harvesting Handbook 16 Saw Chain

17 Mechanical Timber Harvesting Handbook Mechanical Timber Harvesting Handbook 18 19 Saw Chain (refer tothetablesthatfollow) . Ensure youusethecorrect recommendations foryoursawchain Oregon Harvester sawchaingaugesare: drive linktang,whichfitsintothe groove oftheguidebar Saw ChainGaugeisthetermusedtodescribethicknessof Saw ChainGauge both .404"and3/4"pitch rivets, dividedbytwo.Oregon Harvester sawchainisavailablein Saw chainpitchisthedistancebetween anythree consecutive Saw ChainPitch Terminology Saw Chain B .File guideangle A .Top plateangle OGON • • Oregon hasan11stampedonthedrive linktang. 0 .122"(31 mm) Oregon hasan18Xor19Xstampedonthedrive linktang. 0 .080"(2 mm)

Mechanical Timber Harvesting Handbook Tang N o ÷2 C D .DepthGauge Setting C .Top platecuttingangle OGON A 60 =.060" 50 =.050" 30 =.030" 25 =.025" N o D B . Saw Chain 20

Depth gauge Saw Chain Saw Working (cutting) Working corner Side plate Depth gauge Gullet Toe Left-hand cutter . Rivet Tie-strap Mechanical Timber Harvesting Handbook Mechanical Timber Heel The top-plate cutting angle chisels out the severed wood fibers, lifting them up . and out of the kerf The working corner and the wood side plate sever . the grain fibers across The depth gauge rides on the the wood and controls bite of the working corner Right-hand cutter Drive link Drive 3 . 2 . 1 . Top plate Top How a Cutter Works why proper cutters work can help you realize Understanding how saw chain maintenance is so important . Parts of a Saw Chain of a Saw Parts Rivet hole Rivet Parts of a Cutter of a Parts

21 Saw Chain Oregon Features andBenefits 18HX –Harvester SawChain,Micro Chisel • LubriTec • • • • • • 18HX No . saw chain. Wider kerf forreduced guidebarbinding. Larger rivets forreduced sawchainstretch . for increased strength . Wider, toughercoineddrive links are thicker above thegroove improved strength . Blued cuttersprovide superiorcorrosion resistance and especially incoldcuttingconditions. Patented sawchainsteelthatprovides greater durability, excellent performanceandeaseofmaintenance. Micro Chiselcuttershave small-radius workingcornersfor

® Harvester SawChain 2 .0mm Gauge Mechanical Timber Harvesting Handbook ™ .080" tie-straps helpkeep oilwhere it’s needed–onthe Pitch .404" Standard Sequence ® –.404" Saw Chain 22

D Grind Wheel 4-1/8" .050" .050" 1 .27 mm 1 .27 mm OR4125-316 Harvester ONLY Harvester C 80° 60° Grind Wheel 5-3/4" OR534-316 B 10° 10° Harvester Saw Chain Saw Harvester ® Depth 38850 Gauge End View A 35° 35° Oregon File File Guide 31686 |  596397 Harvester multi-purpose tool 596397 Harvester Mechanical Timber Harvesting Handbook Mechanical Timber X

®  7/32" 3/16" | File 12211 Cutter Micro Chisel Micro File 70502

23 Saw Chain Oregon 20 horsepower 1Note: Operating Parameters forthischainrequires aminimumof Features andBenefits cuts inalltypesofwood. improved chipclearance, todeliver fasterandmore consistent chamfer chiselcuttersthatcombinebest-in-classdurability with heads1 andsawmotorsforfastercuttingspeed.Itfeatures tall The 19HXchainisoptimizedformodernhigh-flow, high-power 19HX –Harvester SawChain,ChamferChisel • • • • • 19HX No . Recommended forusewithrim-typesprockets only. improved strength . Blued cuttersprovide superiorcorrosion resistance and especially incoldcuttingconditions. Patented sawchainsteelthatprovides greater durability, compared to18HX. to provide improved strength andsuperiordurability Oregon's largest andthickest .404"componentsare designed designed todeliver fastercutting speedcompared to18HX. A new,tallerandmore aggressive chamferchiselcutteris

® Harvester SawChain 2 .0mm Gauge Mechanical Timber Harvesting Handbook .080" . Pitch .404" Standard Sequence ™ –.404" Saw Chain 24

D Grind Wheel 4-1/8" .050" .050" 1 .27 mm 1 .27 mm OR4125-316 Harvester ONLY Harvester C 60° 80° Grind Wheel 5-3/4" OR534-316 B 10° 10° Harvester Saw Chain Saw Harvester ® Depth 38850 Gauge End View A 35° 35° Oregon File File Guide 31686 | 

596397 Harvester multi-purpose tool 596397 Harvester ™ Mechanical Timber Harvesting Handbook Mechanical Timber X  3/16" 7/32" | File 12211 Cutter File 70502 Chamfer Chisel Chamfer Note: The use of any other than Oregon 19HX part numbers for Note: The use of any other than Oregon and voids the product or joining loops is not approved repair of a chain loop and durability . The effectiveness warranty approved assembled with anything other than these genuine and and is the responsibility parts cannot be guaranteed replacement of the those servicing the chain .

25 Saw Chain Features andBenefits maximum performanceonmore powerful machines. The 11Hsemi-chiselcutterfeatures more aggressive designfor 11H –Harvester SawChain,Semi-Chisel–3/4" Oregon • • • • • 11H No . an offsetfootprinttohelpminimizeguidebar“knife-edging.” 11H cuttersare designedforlongerstay-sharp, andfeature and edge-holdingdurability . Advanced chrome platingprocess forexcellentstay-sharp especially incoldcuttingconditions. Patented sawchainsteelthatprovides greater durability, outstanding durability . Tested, proven chassisdelivers superiorstrength and high‑performance sawchain. Semi-chisel cuttersmake 11Hanaggressive,

® Harvester SawChain 3 .1mm Gauge Mechanical Timber Harvesting Handbook .122" Pitch 3/4" Standard Sequence Saw Chain 26

– D Grind Wheel 4-1/8" .060" .070" .060" .070" 1 .52 mm 1 .78 mm 1 .52 mm 1 .78 mm Harvester ONLY Harvester C 80° 50° 80° 50° Grind Wheel 5-3/4" OR534-316 B 0° 0° 0° 0° Harvester Saw Chain Saw Harvester ® Depth 26800 Gauge End View A 30° 30° 30° 30° Oregon File File Guide 107529 |  Mechanical Timber Harvesting Handbook Mechanical Timber X 533700 Harvester multi-purpose tool 533700 Harvester  5/16" 5/16" 5/16" 5/16" | File 12211 Semi-Chisel File 90410 11H cutters are set to .060" / 1 .52 mm at the factory and should 11H cutters are be left at those settings for cold cutting conditions . In other . conditions, .070" / 1 .788 mm will yield better cutting performance

27 Saw Chain Features andBenefits chipper-style cutters. mechanical harvester/processor applications.Features classic 11BC isabig3/4"-pitch.122"-gaugesawchain,builtfor 11BC –Harvester SawChain,Chipper–3/4" Oregon • • • 11BC No . especially incoldcuttingconditions. Patented sawchainsteelthatprovides greater durability, outstanding durability . Tested, proven chassisdelivers superiorstrength and holding durability . plates forabig,aggressive bite,easysharpening,andedge- Chipper cuttershave fullyrounded workingcornersandside

® Harvester SawChain 3 .1mm Gauge Mechanical Timber Harvesting Handbook .122" Pitch 3/4" Standard Sequence Saw Chain 28

– D Grind Wheel 4-1/8" .060" .060" 1 .52 mm 1 .52 mm Harvester ONLY Harvester C 60° 85° Grind Wheel 5-3/4" OR534-316 B 0° 0° Harvester Saw Chain Saw Harvester ® Depth 26800 Gauge End View A 35° 35° Oregon File File Guide 31686 |  533700 Harvester multi-purpose tool 533700 Harvester Mechanical Timber Harvesting Handbook Mechanical Timber X  5/16" 5/16" | File 12211 Chipper File 90410

29 Saw Chain Discard yoursawchainwhenithas: Discard Decide toDiscardorRepair Inspect Clean Before sharpening,youshould: Saw ChainMaintenance Saw ChainMaintenance • • • • Broken • • • • • • Clean yoursawchain,removing dirt,debris,andlubricant . handling sawchain. protective equipment(gloves andsafetyglasses)when Loose Rivets Excessive stretch Broken and partsare missing bar anddrive sprocket . are indicatorsofothercuttingsystemissueswith theguide Inspect thechainchassisforabnormalwear patterns,which links . occurring totheflangeofrivet andtheholesinyourdrive Inspect forexcessive stretch, stretch isactually wear loose . Inspect looserivets .Ifyoucanturnarivet withyour fingersits components . Inspect forbroken, cracked, damaged,ormissingsawchain Stretch Gauge,inspectyoursawchainforChainStretch . In awell-lit area andusingOregon's Multi-PurposeTool and This stepisrequired before youinspectthechain.

WARNING:

Mechanical Timber Harvesting Handbook To reduce riskofinjury,alwaysusepersonal Saw Chain 30

OGON OGON Saw Chain Maintenance Saw OGON Always use new components when repairing when repairing Always use new components Mechanical Timber Harvesting Handbook Mechanical Timber : WARNING

OGON Only use new Oregon components to replace Oregon Oregon components to replace Only use new Oregon components interchange damaged components . Never . manufacturers between Replace bent, cracked, or damaged saw chain components saw chain components or damaged cracked, Replace bent, are and new components tools proper only when the available . the components, ensure damaged When replacing components . New parts need match the worn replacements the to ensure removing the parts you're to be filed to match is not affected . chain's durability broken or damaged chains . or damaged broken • • • Clean and Lubricate filing and After grinding, chains should be cleaned to remove in a grinding debris . After cleaning, lubricate, and or store container with lubricant . Repair

31 Saw Chain Filing andGrindingAngles See thefollowing chartsformore detailonsharpeningangles. Sharpening andMaintenance Saw ChainMaintenance

19HX 18HX 19HX 18HX 11BC 11BC 11H 11H 11H 11H Mechanical Timber Harvesting Handbook 5/16" 5/16" 5/16" 5/16" 3/16" 3/16" 5/16" 5/16" 7/32" 7/32" |  X  | 30° 30° 30° 35° 35° 35° 30° 35° 35° 35° A 10° 10° 10° 10° 0° 0° 0° 0° 0° 0° B 50° 80° 50° 60° 60° 60° 80° 85° 80° 80° C 1 .778mm 1 .778mm 1 .52mm 1 .52mm 1 .52mm 1 .27mm 1 .27mm 1 .52mm 1 .27mm 1 .27mm .060" .050" .050" .060" .050" .050" 070" 070" 060" 060" D Saw Chain 32

D 070" • 1 .78 mm 060" • 1 .52 mm 040" • 1 .02 mm 060" • 1 .52 mm 060" • 1 .52 mm 060" • 1 .52 mm 060" • 1 .52 mm 070" • 1 .78 mm .050" • 1 .27 mm .050" • 1 .27 mm .050" • 1 .27 mm .050" • 1 .27 mm C 50° 50° 60° 60° 60° 60° 60° 60° 60° 60° 50° 50° B 5° 0° 0° 5° 0° Saw Chain Maintenance Saw 10° 15° 10° 20° 10° 20° 10° A 30° 25° 35° 35° 40° 30° 35° 35° 40° 35° 40° 35° Mechanical Timber Harvesting Handbook Mechanical Timber Frozen Softwood Hardwood Factory Frozen 11H* Softwood Hardwood Factory Frozen 11BC Hardwood Factory Softwood 18HX/19HX Cutting Conditions *For non-winter cutting conditions, the 11H depth gauge setting *For non-winter cutting conditions, the 11H depth gauge to 0 .070" / 1 .788 mm . may be increased Oregon provides a factory grind to suit a majority of our users, but to suit a majority of our a factory grind provides Oregon sharpening alternative approved, the also provide we conditions . for certain cutting that users may prefer specifications Optional Sharpening Angles Optional Sharpening

33 Saw Chain Sharpening andMaintenanceTools Saw ChainMaintenance Hydraulic Assist Bench Grinderwith 620-120 (620-230) ✝ Standard 710-120 Rivet Driver Breaker andBarNose Heavy-Duty Chain 24548-SI Only availableinUSA. ✝

Mechanical Timber Harvesting Handbook Rivet Spinner Heavy-Duty 24549-SI Bench Grinder 3/4" Pitch 530-120H All-in-One AutoGrinder 720-120 ✝

Bench Grinder .404"Pitch 520-120 (520-230) Standard AutoGrinder 730-120 Adaptor Kit 3/4" PitchRivet Spinner Heavy-Duty Rivet Spinner 108742SI *Sharpens 3/4"pitchonly ✝ * Saw Chain 34

Bar Groove Depth Bar Groove Gauge Chain Stretch Saw Chain Maintenance Saw Bar Groove Cleaner Bar Groove Grinding Wheel Gauge Dress 25049 Anvil Breaker 3/4" Pitch Saw Chain Mechanical Timber Harvesting Handbook Mechanical Timber

596397 404" Pitch Harvester Multi-Purpose Tool Multi-Purpose .404" Pitch Harvester Bar Straightener Bar Alignment Tool 533700 505033 Anvil for Breaker Bar Noses Harvester 3/4" Pitch Harvester Multi-Purpose Tool Multi-Purpose 3/4" Pitch Harvester A retired chain section can be used . A retired Plastic tool not intended for bar straightening for this purpose . 1 Harvester Multi-Purpose Tool Functions Harvester Multi-Purpose Tool

35 Saw Chain Modifications chart (pg.32)forindividualspecifications Refer totheFiling Angles(pg.31)orOptionalSharpening the correct topplateangle. file’s diameterabove thecutter’s topplatewhilehelpingyoukeep 1/5th, or20%,ofthecorrect the correct heightlocationof top plate.Itkeeps thefile in always laysflatalongthe the sawchainbecauseit the easiestwaytomaintain Using thecorrect fileguideis Sharpening SawChainwithaRoundFile recommendations foranglesanddepthgaugessettings. all cuttergeometryequal,whilefollowing andnotexceeding File orgrindtogoodchrome, removing alldamageandkeeping Saw ChainMaintenance North America. Note: TheaboveproductshavedifferentPartNumbersoutsideof 3 . 2 . 1 . 19HX 18HX 11BC 11H equal . geometries keeping all damage while remove all Be sure you a time. all thecuttersfrom onesideofthechainat cutter withthemostdamage,sharpening Begin filingonthechain’s leftorright‑hand saw chain . Inspect thecuttersofyourloop 107617 107617 31686 31686

Mechanical Timber Harvesting Handbook 40458 40458 – – 90410 90410 – – A 70502 70502 – – 12211 12211 12211 12211 AB OGON 38850 38850 – – OR 534-516 OR 534-516 OR 534-316 OR 534-316 60 B OGON top plate 20% above = 1/5thor 533700 533700 596397 596397 Saw Chain 36

outside C recommended inside A Saw Chain Maintenance Saw to read your to read Injury, be sure risk of reduce To B Mechanical Timber Harvesting Handbook Mechanical Timber : WARNING

Set the vise assembly to the recommended Angle A Top-Plate (see page 31) and Side-Plate Angle B (see page 31) . Set the grinder head to the Cutting Angle C . (See page 31 .) Top-Plate Repeat the process for the cutters on the other side of the cutters on the other side for the Repeat the process equaland finishing all cutters all geometries chain, keeping same time . one side of your saw chain at the from Always file from the inside of the chassis to the outside as the outside as chassis to the inside of the file from Always . below shown grinder’s owner’s manual for instructions on how to adjust manual for instructions on how owner’s grinder’s safety goggles . to wear forget settings, and don’t • • 5 . 4 .

Setting the Vise Assembly Setting the Vise Set the vise assembly to the: 31) or Optional Sharpening (pg . 31) or Optional Sharpening Refer to the Grinding Angles . Modifications chart (pg . 32) for individual specifications Sharpening Saw Chain with a Grinder Sharpening Saw Chain with 37 Saw Chain For 11H,useamodifiedradius andflatradius asseenbelow . For 11BC,18HX,and19HXuseafullradius dress asseenbelow . wheel dresser oradressing brick. Dress themoftentomaintainthecorrect shapeusingarotary Vitrified GrindingWheels clean andwell maintained. No matterwhatkindofgrindingwheelyouuse,besure tokeep it Grinding Wheels Saw ChainMaintenance • • injury, inspectfordamageincludingcracks, andvoids. Keep toolguards inplace. Run Grinderforoneminutebefore grinding.

WARNING: 3/16" (4.76mm)radius

Mechanical Timber Harvesting Handbook

Grinding wheelscanbreak .To reduce riskof radius 3/16" Full radius 1/8" –Flat 1/8" (3.17mm)flat angle Side-plate angle Side-plate 50° Saw Chain 38

outside inside Saw Chain Maintenance Saw Mechanical Timber Harvesting Handbook Mechanical Timber Never exceed recommended specifications . Doing so will recommended exceed Never the and increase affect the life of operation negatively . potential for a chain shot event If the depth gauge extends above the slot, file it down with a with down the slot, file it above If the depth gauge extends to the outside so the inside of the cutter flat file, filing from . with the depth gauge tool that it is level Place the tool on top of your saw chain so one depth gauge on top of your saw chain Place the tool the tool . the slot of through protrudes 3 . 2 . 1 . Using the correct depth gauge tool for your saw chain: depth gauge Using the correct After filing or grinding, check and adjust depth gauges – depth grinding, check and adjust After filing or chain . of your saw the “bite” gauges control How to Set Depth Gauges to Set Depth How

39 Saw Chain How toBreak OutRivets Saw ChainRepair 5 . 4 . 3 . 3 . 2 . 1 . and gloves . In eithercase,donotuseexcessive force . center thepunchonrivet headandstrike the punch. of thechainbreaker down .Ifyouare usingahandheldpunch, If youare usingabenchmodelchainbreaker, pullthehandle the toppositiononananvilasshown below . breaking thesawchainatacutter, make sure thecutterisin Position therivet headdirectly underthepunch.When drive linkwillthenbesupported onbothsidesoftheslot.) until thebottomtie-strap isflush withthefarsideofslot.(The proper slotofthesawchainanvil andpushsawchainforward Insert theportionofsawchainforbreaking intothe as shown . Drive linksshouldbesupported onbothsidesoftheslot, with thefarsideofanvilslot. anvil, thenpushitforward untilthebottomtie-strap isflush Insert thesawchaintobebroken intotheproper slotofthe your sawchain. Determine theappropriate anvilandslotforthepitchof

WARNING:

Mechanical Timber Harvesting Handbook To reduce riskofinjury,wear eye protection OGON OGON

Saw Chain 40

18HX 18HX OGON OGON 18HX 18HX OGON OGON Saw Chain Repair Saw 18HX 18HX Properly formed Properly head rivet Rivet shape Rivet spinning before 18HX 18HX OGON OGON Mechanical Timber Harvesting Handbook Mechanical Timber For Oregon For Oregon 3/4"-pitch saw harvester chain, it is to recommended spinning . once after assembly before the rivet strike . the rivet to only strike sure Make Do not use a hammer to form for heads rivet .404"-pitch Oregon saw harvester chain . b . a .

If you're replacing a cutter, break at the tie-strap location in at the tie-strap break a cutter, replacing If you're . replacing behind the cutter you’re of and front Place the preset tie-strap on a flat outer surface of a saw on tie-strap Place the preset pointing up . are the rivets anvil . Be sure chain breaker Joining a loop of saw chain at a cutter is not recommended; not recommended; of saw chain at a cutter is Joining a loop location . saw chain at a tie-strap only join your all while allowing head must be snug and secure The rivet . freely joined parts to move Saw Harvester with Oregon For best results the Oregon using recommend Chain, we Spinner to spin the Heavy-Duty Rivet chains . Consult with your local a acquire dealer to Oregon Spinner Heavy-Duty Rivet (24539-SI) . 2 . 1 . • • • Only use NEW Oregon replacement parts that are the Oregon replacement Only use NEW Oregon saw chain. and type to join and repair correct size use in for parts are not designed Oregon replacement saw chain. other manufacturers’ Joining Saw Chain Joining

41 Saw Chain Saw ChainRepair 6 . 5 . 4 . 3 . notch toward thedrive linktangs. Assemble thetie-strap withbrand markordotfaceupandthe Assemble thesawchaintopreset tie-strap . anvil withtherivets pointingup. Place thepreset tie-strap onaflatoutersurfaceofbreaker match theexistingchassispartsasshown below . Cutter andtie-strap replacement partsshouldbefiledbackto OGON OGON

Mechanical Timber Harvesting Handbook 18HX 18HX 18HX 18HX OGON OGON 18HX 18HX OGON OGON 18HX 18HX OGON OGON Saw Chain 42

Saw Chain Repair Saw . Mechanical Timber Harvesting Handbook Mechanical Timber Placing a drop of oil between the rivet head and the tie-strap head and the tie-strap the rivet of oil between Placing a drop motion . The it easier to see relative make twisting can before the is even with capillary action if there oil will visibly move parts . the between tiniest separation 404"-pitch Harvester Saw Chain (18HX, 19HX), Saw .404"-pitch Harvester For Oregon hammer to and anvil “A” . Do not use a up handle “A” use take assemble . (11BC, 11H), use Saw Chain 3/4"-pitch Harvester For Oregon once to with a hammer the rivet part number 108724 . Strike being spun . before in the tie-strap set the rivet hands, twist the chain with gloved After spinning, tension and joined between movement for any relative and look carefully . and their rivets tie-straps the joint is acceptable – if observed, movement No relative should be spun further 5 . 1 . 2 . 3 . 4 . Follow these instructions to join your Harvester saw chain with saw chain with to join your Harvester these instructions Follow spinner: the rivet Additional Chain Joining Instructions Chain Additional

43 Saw Chain following illustrations . Look closelyatyoursawchain’s cuttersandcompare themtothe Cuts slow, cutsrough,orwon’t holdanedge actions youshouldtake: Here are thethingstolookforandassociatedcorrective Most Harvestersawchainproblemsarecausedby: Saw ChainTroubleshooting • • • Lack oflubricationortheusepoorqualitylubricants. Poor maintenancepractices . Excessive sawchainspeedand/or feedforce . 50˚

Mechanical Timber Harvesting Handbook with thesawchain’s correct top-plateangle. saw chain.Besure thefileguideisstamped file atthecorrect top-plate filingangleforthe Remedy: Resharpencutterswhileholdingthe fast .Cuttingactionrough anderratic . Symptoms: Cuttingangleisvery sharp,butdulls or grinding. Cause: Excessive top-plate anglewhilefiling 3. Too muchtop-platefilingangle. is removed . Remedy: File cuttersbackuntilalldamage saw chain.Possibleguidebarrail damage. crookedly ifthedamageistoonesideof Symptoms: Sawchainwon’t cutorcuts to theground . damage typicallyoccurswhencuttingclose wood, suchasrock, dirt,orsand.Thistypeof Cause: Cuttershitorcutmaterialotherthan and/or top-plates. 2. Severeabrasivedamageonside is removed . Remedy: File cuttersbackuntilalldamage Symptoms: Very slow cutting abrasive materials. Cause: Cutterscameincontactwithlight 1. Lightabrasivedamageonsideplates. 20˚ Saw Chain 44

. Premature wear to saw wear cutting . Premature Slow . is too large held too high or file File Saw Chain Troubleshooting Saw Resharpen cutters using the correct Remedy: Resharpen cutters using the correct file guide that is the right size and in the correct position . much hook in the side plate. 7. Too or the file is too small . held too low Cause: File top- at the wrong Grinders: Saw chain ground plate cutting angle, grinding wheel is too small or is grinding too deep into the body of cutter 6. Too little top-plate cutting angle. 6. Too Cause: Symptoms: . Symptoms: Rough cutting . Saw chain grabs hold cutting edge . Cutters dull quickly or won’t . and/or saw chain stretch plate breakage Top Remedy: Resharpen cutters using the correct position . file in the right size held in the correct 5. Too much top-plate cutting angle. 5. Too small . or file is too low held too Cause: File top- at the wrong Grinders: Saw chain ground incorrectly-sized plate cutting angle or using an grinding wheel . Rapid dulling . Symptom: Poor stay-sharp . dulls . Cuts fast for a short time, then file correct Remedy: Resharpen cutters with the position . Use in the right size, held in the correct file guide . correct 4. Too little top-plate filing angle. filing little top-plate 4. Too the at less than or ground Cause: Filed angle . recommended effort extra . Requires cutting Symptoms: Slow in cut . to cut . Possible binding while holding the Remedy: Resharpen cutters for the top-plate filing angle file at the correct is stamped the file guide saw chain . Be sure top-plate angle . correct with the saw chain’s . chain and guide bar rails Grinders: Saw chain ground at the wrong top the wrong at Grinders: Saw chain ground sized grinding plate cutting angle or an incorrectly wheel . Mechanical Timber Harvesting Handbook Mechanical Timber 20˚

50˚ 45 Saw Chain Saw ChainTroubleshooting to usewhenapplyingtheremediesabove. Note: Seepages31–38for theproperfilingtechniques

Mechanical Timber Harvesting Handbook position . file guideintherightsizeheldcorrect Remedy: Resharpencuttersusingthecorrect saw chainandguidebarrails . Symptoms: Slow cutting.Premature wear to enough or thegrindingwheelisnotdeep plate cuttingangle,grindingwheelistoolarge, Grinders: Sawchainground atthewrong top- Cause: File heldtoohighorthefileislarge . 8. Backslopeonthesideplate. correct height. Remedy: File depthgaugesdown totheir to thesawchainandguidebarrails . Symptoms: Slow cutting.Excessive wear depth gaugedamagedinuse. Cause: Too muchdepthgauge removed; 10. Highdepthgauges. are toolow .Replacethesawchain back enoughtocorrect fordepthgaugesthat Remedy: Inmostcases,cutterscannotbefiled and/or sawchainstretch . tie-straps, guidebarrails .Top-plate breakage Excessive wear totheheelofcutters,opposing Symptoms: Roughcutting.Sawchaingrabs . Cause: Depthgaugenever lowered . 9. Lowdepthgauges. intothebodyofcutter . Saw Chain 46

If rails are worn, dress top worn, dress are . If rails Saw Chain Troubleshooting Saw 12. Tie-straps or cutters, broken or 12. Tie-straps in the center. of saw field assembly Cause: Incorrect chain components . or cutters . tie-straps Symptoms: Broken . components Remedy: Replace broken – 42 . on pages 40 See “Joining Saw Chain” precisely. Be sure to spin chain joints 11. Excessive heel wear on cutters 11. Excessive tie-straps; cracks under and opposite rear rivet holes. to cut . Low dull saw chain Cause: Forcing . Lack of lubrication . depth gauge settings tension . Loose saw chain . on cutters wear heel Symptoms: Excessive saw chain . Excessive Saw chain breakage . stretch cutters Remedy: Replace worn or cracked . Sharpen cutters properly and/or tie-straps saw chain tension and often . Use proper and plenty of lubrication . Mechanical Timber Harvesting Handbook Mechanical Timber . guide bar rails Cause: Worn . and cutters worn out of square Symptoms: Bottoms of tie-straps saw chain . If guide replace Remedy: If saw chain is worn excessively, bar guide is too wide, replace bar groove 13. Bottoms of tie-straps and cutters worn out of square. 13. Bottoms of tie-straps and cutters worn out of Maintain proper lubrication and saw chain lubrication . Maintain proper of guide bar to square on pages 83 – 90 . tension . See “Guide Bar Troubleshooting” Cutters or tie-straps wear heavily or break. wear heavily or tie-straps Cutters

47 Saw Chain Drive linkswearheavilyorbreak. Saw ChainTroubleshooting

Mechanical Timber Harvesting Handbook damaged . entire sawchainifmanydrive linksare or both.Sharpendrive linksorreplace Remedy: Replaceguidebar, drive sprocket from guidebar bar groove .Tendency tothrow sawchain or concave .Drive linkscan’t cleanguide Symptoms: Drive linktangswornstraight are duetoshallow guidebarnosegroove . guide barbodygroove .Concave bottoms Cause: Straight bottomsare duetoshallow 14. Straightorconcavebottoms. drive sprocket . sprocket, oranoldsawchainonanew to runanewsawchainonanolddrive or pins.ReplacesawchainDonotattempt Remedy: Replacethedrive sprocket and/ stretch .Shortenedsawchainlife Tight jointsinthesawchain.Saw Symptoms: Changeindrive linkshape. wear the backofdrive link,causingpremature systems are known toconcentrate loadto Cause: Worn drive sprocket .Pinsprocket 16. Peening infrontorback. are damaged. replace entire sawchainifmanydrive links sprocket ifworn.Replacedrive linksor bar groove clearofdebris.Replacedrive the spurdrive sprocket .Keeptheguide prevent sawchainfrom climbingoutof Remedy: Maintainproper tensionto Drive linkscan’t cleantheguidebargroove . Drive linksmaynotfitinguidebargroove . Symptoms: Drive linksare burred ornicked . damage from revolving drive sprocket . jumping from guidebargroove .Resultsin Loose sawchaintensionor Cause: Worn orbroken drive sprocket . 15. Batteredandbrokenbottoms. . . Saw Chain 48

. . Improper sharpening angles . . Improper If saw chain wear is extensive, replace replace is extensive, . If saw chain wear Saw Chain Troubleshooting Saw Guide bar rails have spread, or one spread, have Cause: Guide bar rails saw chain to allowing has worn low, rail lean over .063" One side of saw chain dull . Use of gauge saw chain in .080" guide bar . Symptoms: Saw chain cuts crookedly and saw guide bar rail Accelerated chain wear the saw chain . 17. Drive link tang turned up. link tang 17. Drive . sprocket drive Cause: Worn hit the bottom . link tangs Symptoms: Drive sharpen sprocket, Remedy: Replace drive in Sharpening (as shown link tangs drive if ; see page 49) Link Tangs Drive the saw chain . possible, or replace at bottoms. 18. Sides worn round or thin guide bar and saw chain Remedy: Ensure gauge match . Sharpen cutters frequently, guide angles . Have using recommended if possible, or serviced by a dealer, bar rails . If guide bar square guide bar rails dress guide too wide, replace is spread groove bar Mechanical Timber Harvesting Handbook Mechanical Timber

49 Saw Chain Saw chainhastightjoints. shape witharound file. guide bargroove .Sharpendamagedtangsbacktotheiroriginal Pointed drive linktangshelpremove chipsanddebrisfrom your Sharpening Drive LinkTangs Saw ChainTroubleshooting

Mechanical Timber Harvesting Handbook on aworndrive sprocket . proper tensionanddonotrunsawchain Replace thesawchain.Alwaysmaintain Remedy: Replacethespurdrive sprocket . chain breakage . Symptoms: Sawchainstretch orsaw Cause: Worn spurdrive sprocket . tie-straps. 20. Peening innotchesofcuttersand drive sprocket ifworn . maintain proper tension.Replacetherim be repaired .Replacethesawchainand Remedy: Sawchainwithtightjointscannot chain breakage . Symptoms: Sawchainstretch orsaw worn outdrive sprocket . Cause: Improper sawchaintensionora cutters andtie-straps. 19. Peening onbottomorfront of Saw Chain 50

. . Saw Chain Troubleshooting Saw Mechanical Timber Harvesting Handbook Mechanical Timber Square cutter top-plate lengths . Square cutters back to even Remedy: File . uneven if up guide bar rails Cause: Inconsistent sharpening . Symptoms: Guide bar and saw chain bind in the cut . Could result the guide bar when removing in guide bar and saw chain breakage wear guide bar rail . Uneven tree from 22. Different cutter top-plate lengths 22. Different Square up all damage . Square to remove cutters back enough Remedy: File . if uneven guide bar rails bent and touching the saw being the bar from Note: Prevent the moving the felling cut is done before sure box . Always make . head with the crane harvester Cutters on one side of saw chain are damaged by hitting the are Cause: Cutters on one side of saw chain . saw box or the ground/debris in the cut . Could result Symptoms: Guide bar and saw chain bind the guide bar when removing in guide bar and saw chain breakage wear guide bar rail . Uneven tree from 21. Damage to cutters on one side of saw chain. to cutters on one side of 21. Damage Saw chain cuts crookedly/leans to one side/cuts unevenly to one side/cuts cuts crookedly/leans Saw chain

Guide Bars

51 Mechanical Timber Harvesting Handbook Mechanical Timber Harvesting Handbook 52 53 Guide Bar have 10digits.Here's whateachdigitmeans. Oregon barpartnumbersare printedonthebarpackage,and Understanding BarPartNumbers Guide Bars 404 67 65 64 60 59 55 54 48 45 42 Length cm Gauge 13 00 90 88 82 80 75 74 73 (113) (100)

Mechanical Timber Harvesting Handbook Gauge .080" 2 Bar Mount SM RH HR HS HL 75 2SMRL114 SpeedMax .404"‑pitch bar Sprocket-Nose Solid SteelReplaceable Stump Spray Bar–RH Stump Spray Bar– LH Nose .404"-pitchbar Solid SteelSprocket- Nose Type Bar length ™ XL Pitch .404" F/R Pitch D149 D104 B163 B149 L149 L148 L114 L104 L003 Mount M226 M104 N114 N104 R149 R114 R104 Q163 Q149 Q114 Q104 Q003 S163 S149 Y104 L205 L172 L163 Guide Bar 54

9135 9136 9155 9164 9191 T221 T222 T223 T224 T227 T229 T230 V127 H175 T133 T138 T145 T146 T151 T152 T161 T168 T177 T190 T208 T210 T217 T219 Guide Bars Guide T043 T130 T132 J134 J211 F212 C159 C211 P155 P207 G138 K205 K187 K225 X V C C A B D 3/4" 3/4" 3/4" Very Large Radius Solid Steel Unequal Solid Steel Unequal bar Ended 3/4"-pitch Solid Steel Armor Tip 3/4"-pitch bar Solid Steel Replaceable Solid Steel Replaceable Sprocket-Nose 3/4"‑pitch bar Solid Steel Double- bar Ended 3/4"-pitch Mechanical Timber Harvesting Handbook Mechanical Timber AT UE DE SN XL Harvester Sprocket-Nose Bar SMR Sprocket-Nose XL Harvester 1 ™ .122" Solid Harvester Replaceable Sprocket-Nose Bar RHF Replaceable Sprocket-Nose Solid Harvester Solid Harvester Sprocket-Nose Bar HSF Sprocket-Nose Solid Harvester ® ® 39 40 43 44 45 51 52 58 59 60 64 65 66 77 inch 3/4 18 23 24 27 28 29 30 31 32 33 34 35 36 37 38 SpeedMax Stump Spray Solid Harvester Sprocket-Nose Bar HRF and HLF Sprocket-Nose Solid Harvester Stump Spray Jet-Fit Jet-Fit Solid Harvester Replaceable Sprocket-Nose Bar RHF Replaceable Sprocket-Nose Solid Harvester Solid Harvester Solid-Nose Bar HSF Solid Harvester Guide Bar Types: .404" Pitch Guide Bar Types:

55 Guide Bar Double-Ended Slasher/Pond&DeckBarsDEA,DEB,DEC Harvest ArmorTip BarATV Harvester Sprocket-Nose BarwithJet-Fit andStumpSpray SNC Harvester Sprocket-Nose BarSNC Guide BarTypes: 3/4"Pitch Guide Bars Asymmetrical Slasher/Pond&DeckBarsUEA,UEB,UED Symmetrical

Mechanical Timber Harvesting Handbook Guide Bar 56

529035* 578147* 525152* 529035* C, K J F T,V G Rivet No. Part Standard Mount Type 3/4 537245 101918 40693A SMR14T Part No. Part E H 7-8 8 8 – 9 9 – 10 11-12 Standard Mount Type Tooth Count Tooth 0.080" 0.080" 0.122" 0.080" Drive Sprocket Drive Gauge 3/4 9 21 Q R S SpeedMax 3/4" • 9T Mount Type Tooth Count Tooth .404" • 11T .404" • 14T .404" • 11T Drive Sprocket Drive Pitch and Count Tooth .404" Pitch Guide Bar Mounts Pitch Guide .404" P 404 M L Y B, N D Standard Mechanical Timber Harvesting Handbook Mechanical Timber SpeedMax Mount Type Mount Type 3/4 15 9 - 11 11-13 13 14-16 17-19 Tooth Count Tooth Tooth Count Tooth Drive Sprocket Drive Drive Sprocket Drive Double/Unequal Ender Bars Guide Bar Mount Types and Drive Sprocket Tooth Counts Tooth and Drive Sprocket Guide Bar Mount Types * 25 Rivets per package * 25 Rivets Bar Noses: Solid and Replaceable Sprocket Nose Sprocket Replaceable Solid and Bar Noses:

57 Guide Bar .404" PitchGuideBarMounts L104 Dimensions: 11, 12,13 tooth count: Drive sprocket L003 Dimensions: 17, 18,19 tooth count: Drive sprocket D104 Dimensions: 11, 12,13 tooth count: Drive sprocket L114 Dimensions: 11, 12,13 tooth count: Drive sprocket .435" .404" .555"x 3 .338" mm) x .394"(10 .404" .555"x 3 .338" mm) x .394"(10 .448" ( .875") .7/8" .555" .404"x 3 .338" .394"x

Mechanical Timber Harvesting Handbook 1 1 2 2 1 2 2 2 2 2 2 D104 1 Guide Bar 58

2 1 1 M226 .404” 2 2 1 2 2 2 2 1 1 .404" Pitch Guide Bar Mounts Pitch Guide .404" Mechanical Timber Harvesting Handbook Mechanical Timber

.311" .570" x 3 .914" .555" x .404" .394" (10 mm) x 3 .338" .555" x .404" .640" .555" x .404" .435" .394" (10 mm) x 3 .338"

Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10, 11 M226 Dimensions: M104 sprocket Drive tooth count: 9, 10, 11 Dimensions: Drive sprocket sprocket Drive tooth count: 11, 12, 13 L205 Dimensions: Drive sprocket sprocket Drive tooth count: 11, 12, 13 L148

59 Guide Bar .404" PitchGuideBarMounts Dimensions: 14, 15,16 tooth count: Drive sprocket N114 Dimensions: 14, 15,16 tooth count: Drive sprocket N104 Dimensions: Q: 14,15,16 R: 11,12,13 tooth count: Drive sprocket Q/R104 Dimensions: 11,12, 13 tooth count: Drive sprocket Q003 .555" .404"x 3 .338" .399"x .875" .448" .435" .404" .555"x 3 .338" mm) x .394"(10 .404" .555"x 3 .338" mm) x .394"(10

Mechanical Timber Harvesting Handbook 1 1 R 1 1 1 2 2 2 2 2 2 2 1 1 Guide Bar 60

3 3 2 2 2 2 1 2 1 2 S R 1 R S .404" Pitch Guide Bar Mounts Pitch Guide .404" Mechanical Timber Harvesting Handbook Mechanical Timber

.555" x .404" .394" (10 mm) x 3 .338" .492" .586" x 3 .288" .413" x .696" .413" x .696" .586" x 3 .288" .404" x .555" .435" .399" x 3 .338"

Dimensions:

Y104 sprocket Drive tooth count: 13 Dimensions: Drive sprocket sprocket Drive tooth count: Q: 11, 12, 13 R: 14, 15, 16 S: 17, 18, 19 Q/R/S149 Dimensions: Drive sprocket sprocket Drive tooth count: Q: 11, 12, 13 S: 17, 18, 19 Q/S163 Dimensions: Drive sprocket sprocket Drive tooth count: Q: 11, 12, 13 R: 14, 15, 16 Q/R114

61 Guide Bar .404" PitchGuideBarMounts Dimensions: 14, 15,16 tooth count: Drive sprocket B149 .492" .848" .413"x 3 .406" mm) x .581"(15

Mechanical Timber Harvesting Handbook 2 2 13 Guide Bar 62

3 1 2 2 1 2 2 Mechanical Timber Harvesting Handbook Mechanical Timber

.404" Pitch Jet Fit Guide Bar Mounts Guide Fit Pitch Jet .404"

.581" (15 mm) x 3 .406" .413" x .814" .413" x .814" .492" .581" (15 mm) x 3 .406" .492" .413" x .814" .581" (15 mm) x 3 .406" .413" x .838" .581" (15 mm) x 3 .406"

Dimensions: Drive sprocket sprocket Drive tooth count: 11, 12, 13 L163 Dimensions: L149 sprocket Drive tooth count: 11, 12, 13 Dimensions: D149 sprocket Drive tooth count: 17, 18 Dimensions: Drive sprocket sprocket Drive tooth count: 14, 15, 16 B163

63 Guide Bar .404" PitchJetFit GuideBarMounts NOTE: Notinterchangeable withL149orL163mounts Dimensions: 11, 12,13 tooth count: Drive sprocket L172 .492" .814" .413"x 3 .406" mm) x .581"(15

Mechanical Timber Harvesting Handbook 2 2 1 3 C211 3/4”

Guide Bar 64

F212 3/4” 4 4 2 3 3 2 2 3 2 2 1 3/4" Pitch Guide Bar Mounts Pitch Guide 3/4" 1 1 Mechanical Timber Harvesting Handbook Mechanical Timber

.648" .313" .313" x .867" .640" x 3 .640" .394" x 3 .338" .404" x .555" .190" radius .151" radius .635" x 4 .502"

Dimensions: Drive sprocket sprocket Drive tooth count: 8, 9 F212 Dimensions: C211 sprocket Drive tooth count: 7, 8

Dimensions: Drive sprocket sprocket Drive tooth count: 7, 8 C159

65 Guide Bar 3/4" PitchGuideBarMounts Dimensions: 8 tooth count: Drive sprocket J134 Dimensions: 11,12 tooth count: Drive sprocket G138 Dimensions: 7, 8 tooth count: Drive sprocket K177 Dimensions: 8 tooth count: Drive sprocket J211 .306" x 3.25" .625" x .404" .555" x 3.338" .394" .562" .650" x 7.410" .635"

Mechanical Timber Harvesting Handbook K177 G138 1 1 J211 1 1 2 2 1 2 2 1 2 2 1 1 Guide Bar 66

1 1 1 K225 3/4” 2 2 2 2 2 2 1 1 2 2 K187 3/4" Pitch Guide Bar Mounts Pitch Guide 3/4" 3 3 Mechanical Timber Harvesting Handbook Mechanical Timber

.531" .609" .562" .581" x 3 .288" .413" x .889" .645" .410" .250" .375" x2 .966"

Dimensions: T043 RSN sprocket Drive tooth count: 9, 10

Dimensions: K225 sprocket Drive tooth count: 7, 8 Dimensions:

K205 sprocket Drive tooth count: 7, 8 Dimensions: Drive sprocket sprocket Drive tooth count: 7, 8 K187

67 Guide Bar 3/4" PitchGuideBarMounts Dimensions: 9, 10 tooth count: Drive sprocket T132 Dimensions: 9, 10 tooth count: Drive sprocket T130 Dimensions: 9, 10 tooth count: Drive sprocket T138 Dimensions: 9, 10 tooth count: Drive sprocket T133 .650" 7 .410" .635"x .515" 4 .129" .515"x .562" 3 .064" .531"x .531"x3" 4 .054" .875"x

Mechanical Timber Harvesting Handbook 1 1 1 1 2 2 1 2 1 1 2 2 2 2 Guide Bar 68

1 1 2 2 2 2 2 2 1 1 2 2 3 3 1 1 1 3/4" Pitch Guide Bar Mounts Pitch Guide 3/4" Mechanical Timber Harvesting Handbook Mechanical Timber

.562" .531" .760" x 5 .910" .535" x 3 .226" .531" .531" .637" x 3 .627" .570"

Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T152 Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T151 Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T146 Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T145

69 Guide Bar 3/4" PitchGuideBarMounts Dimensions: 9, 10 tooth count: Drive sprocket T168 Dimensions: 9, 10 tooth count: Drive sprocket T161 Dimensions: 9, 10 tooth count: Drive sprocket T190 Dimensions: 9, 10 tooth count: Drive sprocket T177 5 .25" .760"x .306" 3 .25" .625"x .562" .609" 2 .281" .531"x .568" .880"x x 5.500" .447" .760"

Mechanical Timber Harvesting Handbook 1 T 177 1 3 2 3 2 2 1 2 2 2 2 1 1 Guide Bar 70

1 1 T219 3/4” 2 2 2 2 T208 3/4” T217 1 1 T210 3/4” 1 1 1 2 2 2 2 3/4" Pitch Guide Bar Mounts Pitch Guide 3/4" Mechanical Timber Harvesting Handbook Mechanical Timber

.635" x 3 .312" .151" radius x .190" radius .512" .787" x 4 .330" .782" .770" .515" x 4 .129"

Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T219 Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T217 Dimensions:

T210 sprocket Drive tooth count: 9, 10 Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T208

71 Guide Bar 3/4" PitchGuideBarMounts Dimensions: 9, 10 tooth count: Drive sprocket T222 Dimensions: 9, 10 tooth count: Drive sprocket T221 Dimensions: 9, 10 tooth count: Drive sprocket T224 Dimensions: 9, 10 tooth count: Drive sprocket T223 .630" .679" .679" .760" x 4.374" .760"

Mechanical Timber Harvesting Handbook 1 1 1 1 T222 3/4” T221 3/4” 1 1 1 1 1 T223 3/4” 1 1 1 1 1 2 2 Guide Bar 72

2 2 2 2 3 T230 3/4” T227 3/4” T229 3/4" 1 1 1 1 3/4" Pitch Guide Bar Mounts Pitch Guide 3/4" 1 1 2 2 Mechanical Timber Harvesting Handbook Mechanical Timber 2 2

.812" x 2 .453" .500" .812" x 2 .577" .562" .609" .880" x 7 .584" .506" x 2 .842" .500" x 1 .196" .875" x 4 .000"

Dimensions: Drive Drive sprocket tooth count: 9, 10 V127 Dimensions: T230 sprocket Drive tooth count: 9, 10

Dimensions:

T229 sprocket Drive tooth count: 9, 10 Dimensions: Drive sprocket sprocket Drive tooth count: 9, 10 T227

73 Guide Bar Symmetrical Double-Ended 3/4" PitchGuideBarMounts 9, 10 tooth count: Drive sprocket 9136 Dimensions: 9, 10 tooth count: sprocket Drive 9135 Dimensions: 9, 10 tooth count: Drive sprocket 9164 Dimensions: .531" .516" .375" 3 .000" .531"x 4 .500" .906"x

Mechanical Timber Harvesting Handbook 1 1 1 1 11 1 1 11 11 11 3 3 3 3 1 1 2 2 2 2 1 1 1 1 Guide Bar 74

3 2 2 2 2 2 2 3 3 1 1 1 1 11 1 2 11 11 2 2 3/4" Pitch Guide Bar Mounts Bar Mounts Pitch Guide 3/4" Asymmetrical Double-Ended Double-Ended Asymmetrical Mechanical Timber Harvesting Handbook Mechanical Timber

.531" .656" .531" .531" .760" .531" .656"

Idler end dimension: H175 sprocket Drive tooth count: 21

Idler end dimension: Sprocket end Sprocket dimension: Drive sprocket sprocket Drive tooth count: 14 9191 Idler end dimension: Sprocket end Sprocket dimension: 9155 sprocket Drive tooth count: 15

75 Guide Bar Asymmetrical Double-Ended 3/4" PitchGuideBarMounts

dimension: Sprocket end tooth count:15 Drive sprocket P207 dimension: Idler end dimension: Sprocket end tooth count:15 Drive sprocket P155 dimension: Idler end .531" .781" .531" .656"

1 1 Mechanical Timber Harvesting Handbook 11 1 1 1 1 1 1 11 1 1 1 P207 1 2 2

P207

2 2 2 2 2 2 2

2 2 2 Guide Bar 76

Mechanical Timber Harvesting Handbook Mechanical Timber

77 Guide Bar manual . For proper mountingofyourguide bar, refer totheoperator’s Guide BarMaintenance 5 . 2 . 1 . s Before eachuse Basic GuideBarMaintenanceTasks 4 . 3 . n Often(hourly,oratrefueling) u l s u u Harvester Multi‑Purposetool. Check bargroove depthafterdressing byusingtheOregon the nosecomponentstowear quicklyorjam. the tail,thencleanoutgrooves. Grindingdebriscan cause mount .Note:Ifusingagrindingwheel,direct debristowards Bar Troubleshooting, pgs.83–90)replace asneeded. Cleanguidebargrooves andoilholes. Dress the rail—always dressing from thebartipto

Turn yourguidebarover toequalizebarwear Inspect fordamageandcomponentwear; (refer toGuide n Sawchaintensioning

Mechanical Timber Harvesting Handbook

(See “InstallationandBreak-In” pg.13) l Daily u Weekly, periodically Oil hole .

Guide Bar 78

1/32" 1/32"( 0,8 mm ) Guide Bar Maintenance Guide Bar Rail Dresser, p/n 111589 makes it easy to p/n 111589 makes Bar Rail Dresser, and remove effects of normal wear remove minor damage . Mechanical Timber Harvesting Handbook Mechanical Timber the guide bar’s tip, between the tops of rails, and the the tops of rails, tip, between the guide bar’s cutters or tie-straps before chassis . Replace nose sprockets . contact the bar nose rails On sprocket-nose guide bars, check for clearance around around for clearance guide bars, check On sprocket-nose u 7 .

79 Guide Bar your guidebarandsawchain. Select anewHarvester nosesprocket withthecorrect gaugefor Guide Bars Replacing NoseSprockets onHSHarvester Sprocket NoseReplacement:HS 2 .Punchouttheremainder ofthe 3 .Useasmallscrewdriver tospread 1 .Usinga1/4"drillbit,outhead holes inthenoseofguidebar to keep from damagingtherivet rivets .Useapunchnarrow enough sprocket area . sprocket .Cleandebrisfrom the enough toremove theoldnose the guidebarnoserails just rivets . from eachofthenosesprocket

WARNING:

Mechanical Timber Harvesting Handbook

Wear eye protection andgloves . . Guide Bar 80

. On Sprocket Nose Replacement: HS Replacement: Nose Sprocket Mechanical Timber Harvesting Handbook Mechanical Timber Be careful to hit only the . Be careful used guide bars, the nose rails rails used guide bars, the nose apart . Use a could be spread small clamp to hold the nose when inserting and together rails . securing the rivets solidly bar and rivets the guide With flat metal supported on a strong, peen the rivet surface, carefully with the flat end of a heads down hammer Do not hit the guide bar head . rivet body — this will pinch the nose must be snug heads . Rivet sprocket the while still allowing and secure . to turn freely sprocket drive of possible it is free to ensure Clean out the bar groove debris . Align the sprocket’s inner race inner race Align the sprocket’s guide holes with the holes in the into each bar nose . Insert rivets the guide bar hole through Once fully inside the nose, hold Once fully inside the nose, in place, then the nose sprocket the tissue . remove Inside the nose sprocket package, you’ll find the new sprocket you’ll find the new sprocket package, sprocket Inside the nose inside the the sprocket to keep in a tissue . Be careful wrapped — bearings are the package from it remove tissue as you into together, and the new sprocket, easily lost . Slide the tissue . nose the guide bar’s 7 . 8 . 6 . 5 . 4 .

81 Guide Bar Kits onRH,SM,andSNGuideBars Replacing NoseSprockets withReplacementNose Sprocket NoseReplacementNose:RH,SM,andSNGuideBars 4 . 3 . 2 . 1 .UsingtheOregon heavy‑duty few more hammerstrokes . clicking soundsfrom thesamearea, tightentherivet witha movement inthenoseguidebarjointarea, orifyou hearany solid piece.Ifyoufeelany should feellike asingle, twist .Thenoseandbody bar bodyinonehandand installation, griptheguide the rivet head.To check guide barbody;hitonly a hammer down withtheflatendof peen therivet’s head strong flatmetalsurface, solidly supportedona body, nose,andrivet With theguidebar Insert therivets through theundersideofnose. Remove theoldnose.Cleanguidebar’s attachmentarea . nose oftheguide bar damaging therivet holesinthe narrow enoughtokeep from remaining rivets .Useapunch breaker #24548,break outthe Using theheavy‑dutychain rivets . out thebartipattachment chain breaker #24548,break

Mechanical Timber Harvesting Handbook .Donothitthe . Guide Bar 82

Mechanical Timber Harvesting Handbook Mechanical Timber File down the rails of the new nose to align with the rails of with the rails nose to align of the new the rails down File bar body . the old guide to bar groove Clean out the possible of it is free ensure debris . 5 . 6 . Sprocket Nose Replacement Nose: RH, SM, and SN Guide Bars RH, SM, and Nose: Nose Replacement Sprocket

83 Guide Bar Rail Conditions Guide BarTroubleshooting

Mechanical Timber Harvesting Handbook Chain, pgs Chain, Saw Sharpening (see sharpening after crooked cut to continues it if chain saw the replace gauge, chain saw correct the for check Remedy: cut the in bound bar guide cuts, Symptoms: a. in chain a. using or groove aworn in over leaning chain Saw section) chain saw (see side one Cause: 3. Railononesideiswornthin. quickly orjam. cause nosecomponentstowear out thegrooves. Grindingdebriscan debris towards thetail,thenclean Note: Ifusingagrindingwheel,direct guide barfeedload. lubrication, sawchainsharpness,and develop tooquickly,checkforproper remove wire edges .Ifwire edges square uptheguidebar’s rails and Remedy: Useflatfileorgrinderto break offandchipawayrail material. Symptoms: Leftalone,wire edges can Cause: Normalwear onrails . wire edges. 2. Outsideedgeofrailsdevelop guide barfeedload. lubrication, chainsharpness,and occurs tooquickly,checkforproper life, replace theguidebar Remedy: Guidebarisattheendof chain leansduringcutting. bottom causingdrive linkdamage, Symptoms: Chainridesongroove Cause: Normalwear onrails . becomes shallow. 1. Railsareworndown,groove Damaged or dull cutters on on cutters dull or Damaged Replace the guide bar, bar, guide the Replace 080"-gauge guide bar guide 080"-gauge 35 – 38) .35 Incomplete cuts, leading leading cuts, Incomplete 063"-gauge saw saw 063"-gauge . .Ifwear . . . Guide Bar 84

If not, replace guide . If not, replace If not, replace guide . If not, replace Pinched rails, lack of lack Cause: Pinched rails, lubrication, or accidents and improper cutting techniques . These actions sideways in the links can push drive friction- extreme creating groove, heat . generated Symptoms: Blue spots on rails 600° F reaching indicate temperatures . Rails wear softening (315° C) and rail link damage . quickly . Saw chain drive Remedy: Replace the guide bar and saw chain . bar immediately . 6. Rails along the guide bar body or around the tip of sprocket nose guide bars show blue discoloration. Accidents or irregular Cause: Accidents or irregular techniques, which push operating links sideways or place drive side of the on pressure excessive . or cracks nose, can cause breaks and chain Symptoms: Rails spread bottom, causing rides on the groove chain link damage and the saw drive leans during cutting . dealer may be able to Remedy: Your on a relatively minor damage repair new guide bar 5. Rails around the tip of the 5. Rails around the tip of split solid-nose guide bars are bar at the bottom of the guide groove. 4. Rails around the tip of solid- around the 4. Rails show small nose guide bars sections. cracks or broken-out operating Cause: Accidents or irregular links push drive techniques, which on pressure excessive sideways or place . or cracks breaks the nose, can cause and Symptoms: Damage to tie-straps short guide cutters, saw chain throws, bar life . dealer may be able to Remedy: Your minor damage on a relatively repair new guide bar bar immediately . Guide Bar Troubleshooting Guide Mechanical Timber Harvesting Handbook Mechanical Timber

85 Guide Bar Guide BarTroubleshooting aggressiveness ofthesawchain whencuttingfrozen wood . trees .Increase lubrication,especiallyincold conditions.Reduce guide barfeedforce whencuttingconsists mostlyofsmall-diameter Remedy: Replacetheguidebar ifrail wear isextensive .Decrease the Symptoms: Damagetothesawchain andreduced guidebar life. when cuttinginfrozen wood. feed speed,coldconditions,lackoflubrication, aggressive sawchain Cause: Excessive pressure ontheguidebar, excessive guidebar 9. Railchippinginthemiddleofguide bar.

Mechanical Timber Harvesting Handbook box .Reducetheguidebarfeedspeed bar andsawchainare outofthesaw moving thetree/log whentheguide box .Sharpendelimbingknives .Avoid guide bartogofartherintothesaw Adjust thesawreturn toallow the a drive linkinthegroove asspacer Remedy: Hammerrails togetherwith cut complete a make cannot or cut during log Symptoms: rails apart. forcing drive linkstopryguidebar (2) Sawchainwaspushedsideways, broadside bytree, log,orbranch stub. Cause: (1)Sawchainwasstruck 8. Spreadrails. saw chain. installing aguidebar the guidebarandsawpadwhen guide barusingproper shims.Clean Remedy: Realigndrive sprocket and quickly .Sawchaindrive linkdamage . (315° C)andsoftenedrails .Railswear indicate temperatures reaching 600°F Symptoms: Bluespotsonrails when theguidebarwasinstalled. removed from sawpadorguidebar or rails pinchedbecausedebrisnot Cause: Misaligneddrive sprocket guide bar. 7. Bluespotsatthetailof Guide bar will not enter enter not will bar Guide . .Replacethe . Guide Bar 86

. . Most often Replace the saw chain . If the saw after continues to cut crookedly Saw sharpening, see Sharpening Chain (pgs . 31 – 38) . 10. Rail on one side worn low. on one side 10. Rail cutters on Cause: Damaged or dull chain leaning over one side, or saw or using .063" saw in a worn groove, chain in .080" guide bar caused by the cutters is one short rail on one side of the contacting rocks the cutters closest saw chain, usually . to the ground Symptoms: Incomplete cuts, leading cut . cuts, guide bar bound in the Remedy: Replace the guide bar Guide Bar Troubleshooting Guide Mechanical Timber Harvesting Handbook Mechanical Timber

87 Guide Bar Nose Conditions Guide BarTroubleshooting

Mechanical Timber Harvesting Handbook Use proper sawchaintension. Remedy: Replacesprocket components. no longerfunctions. Symptoms: Guidebarnosesprocket bar rails . log, pullingsawchainoutoftheguide accidents, sawchainbroadsided by Cause: Highsawchaintension, guide barbreaks. 13. Sprocketinthesprocketnose cutting . away from objectsnotintendedfor components .Keeptheguidebarnose Remedy: Replacesprocket Symptoms: Sprocket breakage . the nose’s rails . push thedrive linkssidewaysagainst operating techniquestwistthenoseor Cause: Accidentsorirregular bearings. guide barspread,allowinglossof 12. Railsinthetipofasprocket-nose saw periodicallytodistributewear tension andinvert theguidebaron Remedy: Useproper sawchain bar life. chain throwing, shortenedguide Symptoms: Sawchaindamage,saw Cause: Loosesawchaintension. nose endofthebar. wear afew inchesbackfromthe 11. Chippedrailsorexcessiverail .

Guide Bar 88

. 17. Tabs on the replaceable nose on the replaceable nose 17. Tabs sprocket (RSN) break off. Cause: Accidental bending of the nose . Symptoms: RSN no longer functions . Remedy: Install new RSN . Avoid bending the RSN . 16. Burn ring around nose rivets. . Cause: Bearings overheated breakage, Symptoms: Premature of the sprocket jamming, wearing nose components . flow oil Remedy: Check for proper . Saw chips will plug oil line or rates guide bar oil hole . Clean out the bar oil mesh screen hole daily . Install a wire on the oil tank filler spout to prevent . getting into the tank chips from Decrease the tension applied Remedy: Decrease tensioner by the automatic saw chain 15. Loose or missing nose/ attachment rivets. Cause: The guide bar tip flexing difficult cutting from during operation conditions or accidents . continue to loosen Symptoms: Rivets and the until laminates spread lost . bearings are 100 machine every Remedy: Check rivets and hours . Rehammer loose rivets head is missing . rivet if the rivets replace 14. Nose burned at tip from the tip from the burned at 14. Nose on rails of the saw chain sliding from or guide bar, sprocket nose being recessed into the sprocket the tip. tension from Cause: High saw chain chain tensioners . automatic saw from Symptoms: Nose breakage quickly and jamming . bearings wearing . Always use new rivets Guide Bar Troubleshooting Guide Mechanical Timber Harvesting Handbook Mechanical Timber

89 Guide Bar Mount Conditions Guide BarTroubleshooting Jet-Fit MountConditions

Mechanical Timber Harvesting Handbook slot prematurely .IfaJet-Fit spreads ortheguidebarbreaks atthe Symptoms: Theguidebarmountslot when minoraccidentsorpinchesoccur The guidebarisnotproperly supported inserted intotheguidebarmountholes. Cause: Holdingpins/boltswere not mounting slot. 18. Spreadorbrokenguidebar with Jet-Fit guidebars. consider purchasing headcompatible When purchasing anewharvester head, supplied withtheguidebarholder and usetheholdingpins/boltsoriginally Remedy: Replacebroken guide bars broken off. also breaking, then pinsare missingor the sideasshown withoutthesmalltab fails from thetipofmiddleslotto the guidebackinto sawbox. forward, outofthesawbox, orretracts the cylinderthatsweeps theguidebar Remedy: Reducepressure, or flow, to breakage . accident .Unexplainedguidebarmount the guidebarbeinginvolved inan Symptoms: Guidebarbreakage without the guidebarmount. bar mount,puttingexcessive stress on bar causesittoover-rotate intheguide In eithercase,theinertiaofguide rotation . holder tostopquicklyattheendofits speed istoofast,causingtheguidebar too fast.Theforward guidebar-sweep Cause: Theguidebarretraction speedis bars whennoaccidenthasoccurred. mount breakageonJet-Fit guide 19. Chronicorfrequentguidebar ® guidebar . . Guide Bar 90

. Bar In this case, the Jet-Fit Guide 20. Occasional failure of Jet-Fit of Jet-Fit failure 20. Occasional accidents occur. guide bars when becomes stuck in Cause: The guide bar occurs causing the cut, or an accident become stuck . the guide bar to to required Symptoms: The force the bar approaches dislodge the guide during of the guide bar holder, strength . which the guide bar mount breaks Remedy: guide bar breaks as designed to prevent damage to the expensive guide bar mount as shown in the illustration below Guide Bar Troubleshooting Guide Mechanical Timber Harvesting Handbook Mechanical Timber Æ Bar Guide Mount

Drive Sprockets

91 Mechanical Timber Harvesting Handbook Mechanical Timber Harvesting Handbook 92 93 Drive Sprocket a team as maintained and inspected be should and ateam as wear will third member of your saw chain saw your of member third bar guide your around it drive to chain saw your to machine your from power transfer sprockets Drive Drive Sprocket Types pages 95formore informationondrive sprocket alignment. use shimstoadjusttherim’s positionintocorrect alignment.See *Check thealignmentofyourrimdrive sprocket regularly and HarvesterLok® . Type Rim Rim

Mechanical Timber Harvesting Handbook Advantages • • • • • •

straps . for cuttersandtie- Best sawchainsupport gives zero backlash. drive sprocket andshaft No spacebetween the removal inthefield. adjustment, and for quickinstallation, Hex-head setscrews Keyless hub. shafts . Fittings forsmaller warping . eliminates distortion, Uniform pressure ‑ based cutting system cutting based Drive sprockets are the the are sprockets .Drive Disadvantages • • guide bar* aligned with be properly the rimmust important: Setup is drive sprocket . guide barand the sawchain, damage to to prevent drive shaft aligned tothe must be Drive sprocket They .They Drive Sprocket 94

0." . mm ." 0 mm

Type B Type 0.0" . mm

0." 0.0 mm 0.4" . mm 0." 4.4 mm 0.4" Type C Type .0 mm

0.0" . mm .404" Drive-Shaft Configurations Drive-Shaft .404"

0.4" 0." mm Mechanical Timber Harvesting Handbook Mechanical Timber

. mm 4 Type A and D Type .00" . mm Oregon .404" pitch rim sprockets are configured for use with use with for are configured sprockets .404" pitch rim Oregon with A, B, and C Sprockets are compatible Oregon saw chain. drive-shaft configurations.

95 Drive Sprocket Drive Sprocket Alignment 5 . 4 .Installshimsasnecessarytoensure alignment. 3 .Adjustthedrive sprocket’s positiononthedrive shaftuntilit’s 2 .Usingthetoolthatmatchesyoursawchainpitch,place 1 .Mountyourharvester guidebar onyourharvester head. Secure thedrive sprocket inplace. centered ontheHarvester Multi-PurposeTool . and slideitbackuntilextendstothedrive sprocket . Harvester Multi-Purposetoolinto thegroove ofyourguidebar

Mechanical Timber Harvesting Handbook OR-B100 •1.0mm OR-B050 •0.5mm OR-C100 •1.0mm OR-C050 •0.5mm Harvester Multi-PurposeTool 596397 .404"Pitch Harvester Multi-PurposeTool 533700 3/4"Pitch Drive Sprocket 96

® HarvesterLok Drive Sprocket Alignment Sprocket Drive Mechanical Timber Harvesting Handbook Mechanical Timber Rims pitch drive sprockets are available in two types: are sprockets Our 3/4"‑pitch drive . Rims and HarvesterLok® on chainsaws that float and sprockets rim drive Unlike fixed . are sprockets rim drive self‑align, harvester loop in a thrown result alignment can sprocket drive Improper shims to ensure of saw chain . It may be necessary to use with the guide groove sprocket alignment of the drive proper . groove bar’s Harvester using an Oregon Alignment can be checked Multi- Purpose tool . • • • • 3/4"-Pitch Drive Sprockets 3/4"-Pitch

97 Drive Sprocket replaced . harvester drive sprockets cannot be repaired; theycanonlybe of operation ofyourentire system.Damaged,misused,orworn or wornharvester drive sprockets willdamageandshortenthelife regular inspectionandmaintenanceiscritical.Damaged,misused, The Drive Sprocket isthethird componentofyourcuttingsystem; (0 .635 mm) the depthofwear onthesurface oftherimreaches 0.025" Rims andtheHarvesterLok rims shouldbereplaced when 3/4"-Pitch DriveSprockets surface oftherimreaches 0.025" (0635mm) Rims shouldbereplaced whenthedepthofwear onthe .404"-Pitch DriveSprockets replaced whendamageisobserved . Regardless ofpitchordesign,harvester drive sprockets shouldbe When toReplaceYour Drive Sprocket Drive Sprockets Troubleshooting look for, andthecorrective actionsyoushouldtake: before installinganewsawchain.Here are thethings youshould before eachsessionofuse.Ifworn,replace thedrive sprocket Check thewear onyourrimorspurdrive sprocket daily,and or spurdrive sprocket. NOTE: Anewsawchaincanberuinedifinstalledonawornrim

Mechanical Timber Harvesting Handbook Remedy: Replacerimdrive sprocket link wear, breakage . Symptoms: Sawchainbreakage .Drive surfaces ofrimdrive sprocket . excessive wear onouterandinner Cause: Usedbeyondservicelifecausing Worn rimdrivesprocket Drive Sprocket 98

Torque (lb .-ft .) Torque eff . (pump)

.000583 x GPM x psi Displacement, cubic inches Pounds per square inch Pounds per square Efficiency 63025 T x RPM 231 cu . in . ======psi eff. GPM 1 gal. or Hp or Hp Definitions Hydraulic Pump Information Pump Hydraulic Pump Output Flow Pump Calculations RPM x d Torque (lb .-ft .) Torque 745 .7 231 cu . in . Mechanical Timber Harvesting Handbook Mechanical Timber GPM x psi

volts x amperes 1714 x eff . (pump) Torque Displacement, cubic inches Horsepower minute Revolutions per 5252 = = = = = T x RPM = = = d T Hp GPM Hp Hp Hp RPM

Notes

99 Mechanical Timber Harvesting Handbook Notes

Harvester Head (Mfg ./Model):

Guide Bar Part Number:

Saw Chain (Part Number/Size):

Drive Sprocket (Pitch/Tooth Count):

Mechanical Timber Harvesting Handbook 100 Notes

101 Mechanical Timber Harvesting Handbook This Timber Harvesting Handbook supersedes and replaces all previous Oregon Timber Harvesting Handbooks. Oregon®, HarvesterLok®, Jet-Fit®, Chamfer Chisel™, SpeedMax™, Micro Chisel®, and LubriTec™ are trademarks of Blount, Inc.