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3.25 TROUBLE SHOOTING
3.25 TROUBLE SHOOTING
GENERAL
The following charts list a number of the most common problems
encountered in operation. Some of the faults may be due to care-
less handling or operation, improper maintenance or the use of
lubricating oils other than specified. The "Probable Cause" col-
umn is formulated in such a way as to imply the answer to partic-
ular failure. For repairs requiring expert knowledge and tools,
consult authorized service personnel.
3.25.1 ENGINE
Problem
Engine will not start
Uneven engine operation
Engine overheats
Engine does not develop full
power
Loss of oil pressure
NOTICE
Refer to the engine manual for more detailed information.
238
Fuel tank empty or filter clogged
Fuel supply system air-bound or clogged
Fuel filters not sealed properly
Engine speed control system defective
Cold starting aid, fluid container empty
Fuel filters clogged
Air in fuel system
Engine speed governor defective
Coolant supply insufficient
Fan belt slipping
Coolant passages in cooling system clogged with dirt or scale
Radiator air passages clogged with dirt
Exhaust pipe or muffler restricted
Thermostat defective
Air cleaner clogged
Fuel filters clogged
Exhaust pipe or muffler restricted
Engine speed control system incorrectly adjusted
Valve (s) faulty
Fuel lines restricted
Turbocharger faulty, or inoperative
Oil filter (s) clogged
Low oil level
Poor quality oil
Oil pressure switch defective
Oil pump filter screen clogged
Dirt in regulating valve
Crankshaft, connecting rod or camshaft bearing (s) worn excessively.
Probable cause
OPERATION
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