Yanmar 6CXM-GTE2 Service Manual

SERVICE MANUALMARINE DIESEL ENGINEM9961-H130216CXM-GTE/GTE2

- 3-43-12 -(8) Adjusting points11194Setting of injectionq'ty at startSetting of reduced injectionq'ty of boost compensatorAdjusting of rated

- 3-43-13 -3.11.11 Fuel feed pump(1) FeatureFuel feed pump is double action piston type with fourcheck valves. It is installed on the side of the inj

- 3-43-14 -3.11.12 Disassembly of fuel feed pump1) Remove the piston spring stopper plug and pull out thepiston spring.2) Remove the piston.3) Push t

- 3-43-15 -2) Suction test for the priming pumpLoosen the handle of the priming pump, and push thehandle at 60 - 100 strokes/minute.If fuel comes out

- 3-43-16 -3.11.17 Automatic timer(1) FeatureThe automatic timer controls the fuel injection timingautomatically through the centrifugal force of its

- 3-43-17 -(2) Disassembly1) Remove the attaching bolts of the timer case cover toremove the cover.2) Remove the guide cam retainer from the timer cas

- 3-43-18 -3.11.18 Fuel injection nozzle(1) FeatureThe semi-long type hole-nozzle is used with the directinjection combustion chamber.Fuel from the i

- 3-43-19 -(3) Nozzle body identification numberThe type of nozzle can be identified by the number on theoutside of the nozzle body.(4) Disassembly of

- 3-43-20 -a) Clean off the carbon on the outside of the of thenozzle body with a brass brush.b) Clean the nozzle seat with cleaning spray.c) Clean of

- 3-43-21 -3.11.19 Fuel filter(1) FeatureThe fuel filter is installed between the fuel feed pump andfuel injection pump. Fuel is filtered as it passe

- 3-43-22 -3.11.20 Troubleshooting of fuel oil system(1) Before removing fuel injection pumpIt is necessary to find out the cause of the trouble befo

- 3-43-23 -3. Engine's output is insufficientDefective injection timing, and other failures(1) Knocking sounds caused by improper (too early) inj

- 3-43-24 -3.11.21 ToolsName of tool Shape AppricationGovernor weight support extractor721820-92580Timer extractor158591-54200Spring set bar121978-51

- i -Literature No. M9961-H13021Revision history list Page No. 1Document name SERVICE MANUAL FOR YANMAR MARINE DIESEL ENGINEProduct name 6CXM-GTE/GTE2

- 3-29 -3.11 Fuel Oil SystemThe engine revolutions are transmitted to the camshaft bythe driving gear of the fuel pump via the timer.The feed pump a

- 3-30 -(2) FeatureThe fuel injection pump supplies pressurized fuel to theinjection nozzles through the action of the plunger. The plunger reciprocat

- 3-31 -2) Half injection volume positionDischarge ends earlier as the rack is moved towardszero from the maximum setting. The fuel injection volume i

- 3-32 -3.11.2 Governor(1) FeatureThe two-point weight centrifugal type all speed control governor is directly coupled with the fuel pump. The govern

- 3-33 -(2) Reversed angleich mechanism The CXM model employs the high pressure fuel injection pump to match with its high output structure. When usin

- 3-34 -1) Before starting The starting fuel increase spring let the governorlever move to the "fuel increase" side to raise thestarting per

- 3-35 -3.11.3 Boost CompensatorThe boost compensator, installed to the injection pump of the turbocharged engine models, limits the movement of the

- 3-36 -When the turbocharger catches up the engine speed and the boost pressure is raised, the diaphragm is pressed by the charg-ing pressure, causin

- 3-37 -3.11.4 Disassembly of GovernorThe fixing wire and seal are attached to the governor to limitengine speed and output for protecting the engine

- 3-38 -11) Remove the governor weight nut and washer with a boxspanner, fixing the fuel camshaft by the hole of the fuelpump coupling or holding the

- 3-39 -3.11.6 Reassembly of governorInspect all parts after disassembly and replace any parts asnecessary. Before starting reassembly, clean both th

- 3-40 -7) Hook the governor spring on the pin of the governor leverand control lever.8) Insert the rack link in the governor link, hook the link con-

- 3-41 -3.11.7 Disassembly of fuel injection pumpWhen disassembling the fuel injection pump, separate theparts for each cylinder and be careful not t

- 3-42 -5) Remove the plunger barrel tightening nuts.6) Remove the plunger barrel assembly. Insert two drivers under the barrel flange. (Be carefulnot

- 3-43-1 -11) Remove the rack setting screw and the control rack.12) Remove the tappets.13) Remove the fuel feed pump.14) Put the pump body upside dow

- 3-43-2 -3.11.8 Inspection of fuel injection pump(1) Inspection of plunger1) Thoroughly wash the plungers, and replace the plung-ers that have scrat

- 3-43-3 -3.11.9 Reassembly of fuel injection pump(1) Preparation1) After inspection, arrange and clean all parts.2) Prepare the parts for replacemen

- 3-43-4 -7) After adjusting the preload, remove the camshaft sup-port and install new O-ring in the groove in the sup-port.8) Apply clean lube oil to

- 3-43-5 -16) Insert the plunger barrel in the deflector and barrelcollar. Align the hole in the barrel with the hole inthe collar, then set the strai

- 3-43-6 -23) Align the groove of the spring shoe with the settingbolt and carefully insert the plunger barrel assemblyin the pump housing bore.24) In

- 3-43-7 -28) Install the fuel feed pump to the pump housing.29) Remove the rack set bolt and install the rack settingscrew securely.30) Hook a spring

- 3-43-8 -3.11.10 Adjustment of fuel injection pumpAdjust the fuel injection pump after completing reassembly.The pump itself must be readjusted with

- 3-43-9 -4) Slowly rotate the pump in the normal rotation direc-tion by hand, and measure the plunger lift until fuelflow from the overflow pipe on t

- 3-43-10 -(6) Measurement and adjustment of injection volumeThe injection volume is determined by the fuel injectionpump rpm and rack position. Check

- 3-43-11 -Standard Adjustment Value4) Make the air pressure in the boost compensator piping to 0 MPa(0 kfg/cm2).a) Set the reduced injection q't