Workshop Manual

TROUBLESHOOTING 12–11
OK
OK
INSUFFICIENT POWER
Checkpoint Trouble Cause Remedy
Injection pump Worn roller tappet Replace the roller tappet
Exhaust gas leakage from the
exhaust system
Air leakage from the intake system
Repair or replace the related
parts
Defective turbocharger assembly Replace the turbocharger assembly
NG NG
NG NG
NG NG
Continued from the previous page
OK
OK
Compression pressure
Blown out cylinder head gasket
Worn cylinder liner
Piston ring sticking or broken
Improper seating between the
valve and the valve seat
Replace the related parts
Valve clearance improperly
adjusted
Adjust the valve clearance
Valve spring weak or broken Replace the valve springValve spring
Valve clearance
NG NG
NG NG
NG NG
OK
OK
Exhaust system Exhaust pipe clogged Clean the exhaust pipe
Full load adjusting screw seal
Open and improperly set
adjusting screw seal
Adjust and reseal the adjusting
screw
NG NG
NG NG
OK
Turbocharger