Troubleshooting

(Table 25, contd)
Troubleshooting Test Steps
Values Results
6. Engine Accessories and Transmission
A. Ensure free movement of the driveline.
B. Remove and inspect any engine accessories that may lock
up the engine.
The following list contains examples of engine accessories that
may lock up the engine:
· Hydraulic pump that is driven from the rear gear group
· Air compressor
· Engine oil pump
· Other components that are driven by the engine
Engine accesso-
ries and
transmission
Result: The engine accessories and transmission are not
OK.
Repair: Make the necessary repairs.
Result: The engine accessories and transmission are OK.
Proceed to Test Step 7.
7. Hydraulic Lock
Note: If an injector has been replaced, evacuate any fluids from
the cylinder and attempt to start the engine. Fuel will flow from
the cylinder head into the cylinders when a unit injector is
removed.
A. Check for fluid in the cylinders by removing the individual unit
injectors. Check for damaged seals.
B. If there was excessive fuel in the cylinder, replace the seals
and reinstall the injector. Drain any excess fuel from the cylinder
head.
C. If a mechanical problem is suspected, disassemble the en-
gine. Refer to the Disassembly and Assembly manual. Inspect
the internal components for the following conditions:
· Seizure
· Broken components
· Bent components
Hydraulic lock Result: The engine has a hydraulic lock.
Repair: Make the necessary repairs.
Result: The engine rotates freely.
Contact the Dealer Solution Network (DSN).
i06223552
Engine Has Early Wear
Probable Causes
• Contaminated oil
• Leaks in air intake system
• Engine History
• Low oil pressure
• Dirt in engine oil
• Incorrect oil
• Dirt in fuel
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
UENR0612-07 65
Symptom Troubleshooting
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