3.25 TROUBLE SHOOTING OPERATION
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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 formualted 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
OTICE
Refer to the engine manual for more detailed information.
Problem Probable cause
Engine will not start
● 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
Uneven engine operation
● Fuel filters clogged
● Air in fuel system
● Engine speed governor defective
Engine overheats
● 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 restiricted
● Thermostat defective
Engine does not develop full
power
● 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
Loss of oil pressure
● 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.
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