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Service Manual W-46 Marine Diesel Engine

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Service Manual W-46 Marine Diesel Engine -(£R/J· ((, " .... ·• 1-_,. l 1ft ~0 q "" ~to""' SERVICE MANUAL W-46 MARINE DIESEL ENGINE .. AND 15/12: BTD MARINE DIESEL GENERATOR SINGLE AND THREE PHASE PUBLICATION. N0.34907 REVISION. 2 OCTOBER. 2017 l~ rWESTERBEKE. ~ WESTERBEKE CORPORATION • 150 JOHN HANCOCK ROAD .J MYLES STANDISH INDUSTRIAL PARK• TAUNTONMA 02780 WEBSITE: WWW.WESTERBEKE.COM .. , A wARNING Exhaust gasses contain Carbon Monoxide, an odorless and colorless gas. Carbon Monoxide is poisonous and can cause unconsciousness and death. Symptoms of Carbon Monoxide exposure can include: •Dizziness • Throbbing in Temples •Nausea • Muscular Twitching •Headache • Vomiting • Weakness and Sleepiness • Inability to Think Coherently IF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS, GET OUT INTO THE FRESH AIR IMMEDIATELY. If symptoms persist, seek medical attention. Shut down the unit and do not restart until it has been inspected and repaired. A WARNING DECAL is provided by WESTERBEKE and should be fixed to a bulkhead near your engine or generator. WESTERBEKE also recommends installing CARBON MONOXIDE DETECTORS in the living/sleeping quarters of your vessel. They are inexpensive and easily obtainable at your local marine store. CALIFORNIA PROPOSITION 65 WARNING Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. TABLE OF CONTENTS INTRODUCTION ............................................... ...... 2 Serial Numbcr ................................................ 2 TEmNG FOR OVERHAUl .................................. .... 3 Compression Test .......................................... 3 Compression Pressure ................................... 3 ENGINE TROUBLESHOOTING (Pages 4-7) .............. 4 ENGINE DISASSEMBLY (Pages 8-15) .................... 8 Fuel lnjectiun Pump Removal ....................... 8 Order of Engine Disassembly ..................... 10 INSPECTION AID REPAIR (Pages 16-35) ........... 16 ENGINE ASSEMBLY (Pages 36-47) ..................... 36 Fuel Injection Pump (Pages 48-50) ............. 48 LUBRICATION SYSTEM (Pages 51-54) ................ 51 COOUNG SYSTEM (Pages 55-60) ....................... 55 FUEL SYSTEM (Pages 61-68) .............................61 TIGHTENING TORQUE .......................................... 69 STARTER MOTOR ........................................ ........ 70 ALTERNATOR (Pages 73-77} ............................... 73 TRAISMISSIOIS ................................................. 78 Borg \Vamer ................................................. 78 Walter V~Drivc ............................................. 81 ZF ...............................................................83 THE BT GENERATOR (Pages 85-1 00) .................. 85 Troubleshooting, Testing & Diagrarns ........ 85 ENGINE WIRING DIAGRAMS (Pages 101-105) .. 101 ENGINE SPECIFICATIONS (Pages 106-109) .. .... 106 GENERATOR SPECIFICATIONS .......................... 110 INTRODUCTION RAW WATER COOLING CIRCUIT SERIAL NUMBER LOCATION Siphon-Break For installations where the water injected exhaust elbow is close to or will be below the vessels waterline, provisions must be made to install a siphon-break in the raw water supply hose to the water injected exhaust elbow. The siphon­ break provides an air vent in the raw water cooling system to prevent taw water from filling the exhaust system and the engine's cylinders when the engine is shutdown. If you have any doubt about the position of the water­ injected exhaust elbow relative to the vessels waterline under the vessels various operating conditions, install a siphon­ break. This precaution is necessary to protect your engine. The siphon-break must be installed in the highest point of a hose .that is looped a minimum of 20 ioches (51 em) above the vessels waterline. This siphon-break must always be above the waterline during all angles of vessel operation to prevent siphoning. NOTES, CAUTIONS AND WARNINGS NOTE: A siphon-break requires periodic inspection and As this manual takes you through the disassembly, inspection cleaning to ensure proper operation. Failure..J.o properly and assembly procedure of your engine/generator, critical · maintain a siphon-break can result in catastrophic engine information will be highlighted by NO'IES, CAUTIONS, dmnage. Consult the siphon-break 11U11J,Ufacturerf6r proper and WARNINGS. An explanation follows: maintenance. NOTE: An operating procedure essential to note. A CAUTION: Procedures, which if not strictly observed, can result in the damage or destruction of your engine/generator. · SIPHON-BREAK WITH STAINLESS LOOP FOR 1" HOSE PART N0.044010 A WARNING: Procedures, which If not properly followed, can result in personal injury or loss of life. ENGINE OVERHAUL The following sections contain detailed information ORDERING PARTS relating to the proper operation characteristics of the major Whe~ever replacement parts are needed, always provide the components and systems of the engine. Included are generator model number, engine serial number, and generator disassembly, inspection and reassembly instructions for the serial number as they appear on the silver and black guidance of suitable equipped and staffed marine engine name-plate located on the generator end. You must provide service and rebuilding facilities. The necessary procedures us with this information so we may properly identify should be taken only by such facilities. your engine/generator. In addition, include a complete part description and part number for each part needed (see Additional detailed information and specifications are pro­ the separately furnished Parts List). Also insist upon vided in other sections of this manual, covering the generator, alternator, starter motor, engine adjustments, WESTERBEKE packaged parts because will fit or generic coolirtg pumps, etc. · parts are frequently not made to the same specifications as original equipment. 2 ·TESTING FOR OVERHAUL HOW TO DETERMINE ENGINE OVERHAUL PERIOD COMPRESSI_ON TEST CaQse of Low Compression When testing compression the Control Panel (generators), Generally, the time at which an engine should be overhauled or the Instrument Panel (propulsion engine ) can be by-passed is determined by various conditions such as lowered engine . by connecting an electrical jumper directly to the .starter as shown power output, decreased compression pressure, and increased . in the illustration below. A jumper can easRy be fabricated using fuel and oil consumption. The lowered engine power output wires and a pushbutton. is not necessarily due to trouble with the engine itself, but is sometimes caused by injector nozzle wear or injection pump COMPRESSION PRESSURE: wear. The decrease in compression pressure is caused by 440 PSI/31kg-cm (normal) many factors. It is, therefore, necessary to determine a cause 355PSI/ 25kg-cm ( limit) or causes on the basis of data produced by periodic inspection and maintenance. Oil analysis on a seasonal basis is a good means of monitoring engine internal wear. When caused by worn cylinders or pistonrings, the following. symptoms will occur: · 1 Low engine .,;ower output 2 Increased fuel consumption · 3 Iitcreased oU consumption 4 Hard engine starting 5 Noisy engine operation . DISASSEMBLY These symptoms often appear together. Symptoms Z and 4 can result also from excessive fuel injection, improper injec­ NOTE: Befo'f! disassembly aiu:Lcleaning, ca~lly check tion timing, and wear of the injectors. They are caused also for defects which· cannot be found after disassembly and by defective electrical devices such as the battery, alternator, cleaning. · · · starter and glow plugs. Therefore it is desirable to judge the • All disassembled parts should be carefullY._ arranged in optimum engine overhaul time by the ·Jowered compressio!l order of reassembly. Mark or label the partS It& needed pressure caused by worn cylinders and pistons plus increased to insU.re proper mating and reassembly' in the proper· oil consumption. Satisfactory combustion is obtained only directions and positions. under sufficient compression pressure. If an engine lacks • It: the disassembly procedure is complex requiring many compression pressure, incomplete combustion of fuel will parts to be' disassembled, the parts snould be disassembled take place even if other 'parts of the engine are operating in a way that will allow them to be efficiently reassembled properly. To determine the period of engine overhaul, it is without any change in the engine's external appearance or imporbplt.to measure the engine compression pressure regu­ its perfonnance. · larly. At the sl\!!le time, the engine speed at which the mea- • Do not remove or disassemble the parts that require no . surement of compression pressure is made should be checked disassembly. because the compression pressure varies with engine rpm. • Carefully inspect each part after its removal for damage, The engine rpm ca:n· be m~ured at the front end of the crankshaft. deformation, and other problems. • Carefully check gaskets, packings and oil seals, even if NOTE: In case ofsevere vibrations and detonation noise, the checking is not specified. Replace with new ones ifdefective. cause may be}'u£1 ir{jector problems, see FUEL lNJECI'ORS. • Be careful not to damage the disassembled parts. Keep the Pool fuel quality, contaminates and loss ofpositive fuel parts clean. prnssure to the injection pump will result in injector faults. • Use proper tools. Apply oil when necessary. Ta:ke special NOTE: Make certain the engines valve clearances
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