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KD 702_1003_1404 Workshop Manual_cod. ED0053029340_1° ed_ rev. 00
3
POSSIBLE CAUSE
TROUBLE
FUEL
CIRCUIT
ELECTRIC
SYSTEM
MAINTENAN-
CE
SETTINGS REPAIRS
TROUBLE SHOOTING
THE ENGINE MUST BE STOPPED IMMEDIATELY WHEN:
1) - The engine rpms suddenly increase and decrease;
2) - A sudden and unusual noise is heard;
3) - The colour of the exhaust fumes suddenly darkens;
4) - The oil pressure indicator light turns on while running.
TABLE OF LIKELY ANOMALIES AND THEIR SYMPTOMS
The following table contains the possible causes of some failures which may occur during operation.
Always perform these simple checks before removing or replacing any part.
TECHNICAL INFORMATION
Clogged fuel pipes
Clogged fuel lter
Air or water in the fuel circuit
Tank cap breather blocked
Faulty fuel pump
Lack of fuel
Glow plug fuse burned
Faulty glow plug control relay
Flat battery
Unclear or mistaken cable connection
Faulty starter switch
Faulty starting motor
Faulty glow plugs
Clogged air lter
Prolonged operation at idle
Incomplete run-in
Overloaded engine
Excessive valve clearances
Absence of valve clearances
Incorrect speed governor leverages
Speed governor spring broken or disengaged
Idle low
Worn out or stuck rings
Worn out cylinders
Worn out valve guides
Bad valve seal
Bearing shells of bearing cap - piston rod - rocker worn out
E.G.R. valve blocked open
Governor leverages not running
Cylinder head gasket damaged
Faulty timing system
Supplementary starter spring broken or disengaged
Engine overheats
Oil and fuel dripping
from the exhaust
Excessive oil consum-
ption
Oil level increase
Oil preassure too low
White smoke
Black smoke
Non-uniform speed
No acceleration
Engine starts but stops
Engine does not start
High noise level
Inadequate performance
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