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Drum Brake – Cam Cover Replacement Procedure

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Drum Brake – Cam Cover Replacement Procedure Drum Brake – Cam Cover Replacement Procedure PART NO: SUSP. NO: SERIAL NO: GROSS AXLE WEIGHT RATING CERTIFICATION IS PER THE FINAL STAGE MANUFACTURER OR ALTERER. THIS PRODUCT MAY BE COVERED UNDER ONE OR MORE PATENTS, ADDITIONAL PATENTS MAY BE PENDING. www.ridewellcorp.com (800) 641-4122 Suspension Identification Tag The Suspension Number and Serial Number refer to the model and the date of manufacture of an individual suspension system. A 606- Installation/Assembly Number (Part Number) is listed when other system components such as axles are installed at the factory. Brake cam cover and support bracket components are part of the cam cover replacement service kit. Trailer Preparation Park the trailer on a level surface. Set the trailer parking brakes. Chock wheels on an axle not being raised to keep trailer from moving. Discon- nect linkage from the height control valve(s), if necessary, and exhaust all air from the air springs. Always wear personal protective equipment when working on the vehicle suspension. Failure to provide support, chock vehicle’s wheels or exhaust the air system could allow vehicle movement that could result in serious injury. Brake Cam Cover Replacement 1. Raise vehicle side where the brake cam cover is to be replaced until the wheel clears the surface. Support with safety stands. 2. Remove the tire/wheel assembly. Remove hub/drum components to access the axle spider. Remove the slack adjuster/clevis assembly and other brake components to access the inboard brake cam bracket. 3. Use snap ring pliers and flat head screwdriver to remove the snap ring and flat washer(s) from the splined end of the Brake Cam (slack adjuster end). 4. Remove hardware holding the Cam Cover Support Bracket to the Cam Mounting Bracket. Continued on next page Notes and Cautions The tool instructions uses two types of service notes, defined as: “NOTE”: Provides additional instructions or procedures to complete tasks and make sure that the suspension functions properly. Indicates a hazardous situation or unsafe practice that, if not avoided, could result in equipment damage and serious injury. ENG-DrumBrake Axle-CamCover-Replacement Rev0-08-12-20 9710036-Rev0-DrumBrake-CAMCVR-REPL-08-12-20Page 1 Brake Cam Cover Replacement Continued from previous page 5. Tap on the splined end of the brake cam with a rubber mallet to loosen. Pull cam out from the outboard side of the cam cover. Inspect brake cam for damage. Replace if necessary. 6. Remove cam cover from the mounting brackets. Inspect cam bearing, outboard cam seal and Remove hardware from mounting bracket. thrust washer inside axle spider Tap brake cam with rubber mallet. Pull cam for damage.Replace compo- out of the outboard end of cam cover. nents if necessary. 7. Grind away paint on three sides of the hole in the cam cover support bracket for welding. Orient bracket so that one weld area is on the outside (away from the axle). Place bracket on end of cam cover. 8. Insert ground (shiny) end of cover into inboard side of axle spider. Tap with rubber mal- Insert brake cam let to firmly seat the cam cover through outboard inside the axle spider. Bolt cam end of cam cover. cover support bracket to the Secure cam with mounting bracket. a flat washer and 9. Push brake cam through cam snap ring on the cover until groove on inboard ridged end of cam. side of splined end appears. Place flat washer against cam cover. Push snap ring onto brake cam and into groove. 10. Tack-weld cam cover to support bracket on top, bottom and side away from axle. 11. Lubricate brake cam using the grease fitting on the axle spider. Add grease until grease purges out the slack adjuster end of cam cover. Wipe away excess. 12. Reattach the brake components. Reassemble the wheel end com- ponents that were removed. Replace tire/wheel assembly. Remove support stands and lower vehicle to the ground. Repeat the cam cover replacement procedure on other side of axle. ENG-DrumBrake Axle-CamCover-Replacement Rev0-08-12-20 Page 2 5” (Standard) and 5 3/4” Large Diameter Axle (LDA) Slack Adjuster Assembly Tapered Spindle “N” Shown Push-Rod/Clevis Assembly (See 16.5” Brake Section) Brake Chamber Assembly Snap Ring (See 16.5” Brake Chamber Section) 13 (Slack Adj.) Locknut/Flat Washer/Bolt (Slack Adj. End) 14 12 Flat Washer Brake Cam Bracket (5” Axle bracket shown) 15 Axle Wrap 11 Snap Ring (5 3/4” LDA Only) 10 Flat Washers 9 Cam Seal 8 Cam Cover Support Bracket Thrust Washer 2 7 Cam Cover 1 Brake Cam (S-Cam) 6 Seal (O-Ring) - Cam Cover 5 Cam Bearing 4 Cam Seal Cam Cover Service Kit 3 5” – Standard Axle DWG No. QTY Per Axle 5 3/4” – LDA Item Description 1 1 1667591B106 S-Cam (613 mm), Left-Hand 1 1667591B206 S-Cam (613 mm), Right-Hand 2 2 1667591B043 Thrust Washer - S-Cam 3 2 1660306 Cam Cover Service Kit (613mm Cam) 4 1 1667591B038 S-Cam - Seal (Axle Spider End) 5 1 1667591B039 S-Cam - Bearing (Axle Spider End) 6 1 1660633 Seal (O-Ring) - Cam Cover (Axle Spider End) 7 1 1667591B036 Cam - Cover Assembly (536 mm); bushings included 8 1 1667591B037 Support Bracket (2” Universal) - Cam Cover 9 1 1660634 S-Cam - Seal (Slack Adj. End) 10 10 1667591B044 S-Cam - Spacer Washer (Slack Adj. End) 11 1 1667591B009 S-Cam - Snap Ring (Slack Adj. End) 12 2 1667591B016 S-Cam - Spacer Washer (slack adjuster) 13 2 1667591B017 S-Cam Snap Ring (slack adjuster) 14 8 1150063 Locknut - M8 (Slack Adj. End) 8 1140081 Bolt (HHCS) – M8 x 30mm (Slack Adj. End) 8 1160031 Flat Washer (Slack Adj. End) 15 2 7720039 Cam Bracket - 5”Axle 2 7004538 Cam Bracket - 5 3/4” LDA ENG-DrumBrake Axle-CamCover-Replacement Rev0-08-12-20 Page 3 5 3/4” Large Diameter Axle (LDA) Brake Chamber Assembly Short Cam (Tapered Spindle “N” Shown) (See 16.5” Brake Chamber Section) Slack Adjuster Assembly Push-Rod/Clevis Assembly (See 16.5” Brake Section) 13 Snap Ring (Slack Adj.) Locknut/Flat Washer/Bolt (Slack Adj. End) 14 12 Flat Washer Brake Cam Bracket (5 3/4” LDA bracket) 15 11 Snap Ring 10 Flat Washer 9 Cam Seal 8 Cam Cover Support Bracket 7 Cam Cover 6 Seal (O-Ring) - Cam Cover Thrust Washer 2 5 Cam Bearing 4 Cam Seal Cam Cover Service Kit 3 1 Brake Cam (S-Cam) DWG No. QTY Per Axle 5 3/4” Large Diameter Axle (LDA) Item Description 1 1 1667591B108 Short S-Cam (283 mm), Left-Hand 1 1667591B208 Short S-Cam (283 mm), Right-Hand 2 2 1667591B043 Thrust Washer - S-Cam 3 2 1660387 Cam Cover Service Kit (283mm Cam) 4 1 1667591B038 S-Cam - Seal (Axle Spider End) 5 1 1667591B039 S-Cam - Bearing (Axle Spider End) 6 1 1660633 Seal (O-Ring) - Cam Cover (Axle Spider End) 7 1 1667591B049 Short Cam-Cover Assembly (169.5 mm); bushings included 8 1 1667591B037 Support Bracket (2” Universal) - Cam Cover 9 1 1660634 S-Cam - Seal (Slack Adj. End) 10 10 1667591B044 S-Cam - Spacer Washer (Slack Adj. End) 11 1 1667591B009 S-Cam - Snap Ring (Slack Adj. End) 12 2 1667591B016 S-Cam - Spacer Washer (slack adjuster) 13 2 1667591B017 S-Cam - Snap Ring (slack adjuster) 14 8 1150063 Locknut - M8 (Slack Adj. End) 8 1140081 Bolt (HHCS) – M8 x 30mm (Slack Adj. End) 8 1160031 Flat Washer (Slack Adj. End) 15 2 7002997 Brake Cam Bracket-LDA (B13-6301) ENG-DrumBrake Axle-CamCover-Replacement Rev0-08-12-20 Page 4.
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