Service manual

TROUBLESHOOTING
VANMAR. MP Pump service Manual
Correction
Locate air leak using clear fuel
line and repair.
Disassemble and clean, or
replace element.
Repair or replace.
Inspect packing and torque to
specifications.
Replace hydraulic head and
filters.
Repair or replace.
Repair or replace.
Repair.
Replace
Repair.
Replace.
Replace.
Replace.
Repair or replace nozzles and
filters.
Replace.
Replace or adjust.
Inspect and calibrate pump.
Adjust.
Calibrate pump.
Repair
/ replace feed pump or
filter.
Repair or replace.
Replace Hydraulic head.
Replace.
Replace.
Adjust.
Repair or replace nozzle.
Adjust.
-
FIepair cooling system.
Adjust.
Inspect and repair.
Repair or replace.
Adjust.
Inspect fuel system, and clean.
Inspect engine block, cylinder
head and head gasket for
leakage of coolant into
combustion area.
Inspect cooling system.
Cause
(1) Air in fuel lines.
(2) Fuel filter clogged.
(3) Poor feed pump performance.
(4) Delivery holder is too tight.
(5) Plunger is worn and fuel injection adjustment is difficult.
(6) Movement of control rack is defective
(6 a) Stiff plunger movement or sticking.
(6 b) Rack and guide is defective.
(6 c) Poor delivery valve operation.
(7) Movement of governor is improper.
(7 a) Shifter is worn.
(7 b) Governor spring is too weak.
(7 c) Governor weight assembly worn.
(8) One or more faulty nozzles.
(9) Charge pump is worn.
(1) Low idling stopper bolt is abnormal.
(2) Calibration of low speed incorrect.
(1) Throttle improperly adjusted.
(2) High speed stop improperly set.
(3) Fuel supply inadequate.
(4) One or more nozzles defective.
(5) Plunger is worn.
(6) Governor spring is worn.
(7) Charge pump is defective.
(1) Injection timing is too fast.
(2) lnjection from nozzle is improper, fuel drips after each
injection.
(3) Injection nozzle starting pressure is too high.
(4) Engine overheats.
(1) Injection timing is too fast.
(2) Air volume intake is insufficient.
(3) Injection from nozzle is improper.
(1) Injection timing is too slow.
(2) Water in fuel.
(3) Coolant leaking into cylinders.
(5) Engine is over-cooled.
Complaint
4. Rough idle.
5. Engine operates normal
at high RPM, but runs
rough and or stalls at low
RPM.
6. Engine not achieving
maximum RPM.
7. Loud engine knocking
sound.
8.Engine
emits
excessive
smoke.
When
exhaust
smoke is
black:
When
exhaust
smoke is
white: