Troubleshooting

46 RENR2696-01
Troubleshooting Section
3. Refer to Troubleshooting, “Fuel Injection Pump
Circuit - Test”
.
i01798122
Engine Oil in Co
olin g Sy s tem
Note: This is NOT an electronic system problem.
Refer to Testi
ng and Adjusting for information on
determining the cause of this condition.
Probable Causes
•
Engine oil coo
ler core
•
Cylinder head gasket
•
Cylinder head
Recommended Actions
Engine Oil Co
oler Core
1. Drain the coolant from the engine and the radiator.
Drain the lub
ricating engine oil from the engine oil
cooler. Refer to the Operation and Maintenance
Manual for more information.
2. Inspect the engine oil cooler core for leaks. Refer
to Testing and Adjusting, “Cooling System” for the
correct proc
edure. If a leak is found, replace the oil
cooler core. Refer to Disassembly and Assembly,
“Engine Oil Cooler Core - Remove”. Fit new seals
between the
oil cooler and the oil cooler cover.
3. Refill the crankcase with clean engine oil to
the correct
level. Refer to the Operation and
Maintenance Manual for more information.
Cylinder H
ead Gasket
1. Remove the cylinder head. Refer to Disassembly
and Assemb
ly, “Cylinder Head - Remove” for the
correct procedure.
2. Inspect th
e cylinder head gasket for faults and any
signs of leakage.
3. Check the c
ylinder liner projection. Refer to
Testing and Adjusting, “Basic Block” for the correct
procedure.
4. If all of the cylinder liner projections were correct,
and if there was no obvious signs of a faulty head
gasket pr
oceed to the recommended actions for
the Cylinder Head.
5. If any of the cylinder liner projections were
incorrect, and
this had resulted in the failure of
the head gasket, fit a new head gasket. Refer
to Disassembly and Assembly, “Cylinder Head -
Install” for t
he correct procedure.
Cylinder Head
1. Check the cylinder head for flatness. Refer to
Systems Operation, “Cylinder Head - Inspect” for
the correct p
rocedure.
2. Check the cylinder head for cracks. If a crack is
found, repai
r the cylinder head and/or replace
the cylinder head. If the cylinder head is not
cracked and the head is flat, fit the head. Refer
to Disassemb
ly and Assembly, “Cylinder Head -
Install” for the correct procedure.
Thoroughly
flush the coolant system in order to
remove all traces of the engine lubricating oil from the
coolant system. Fill the coolant system with coolant.
Refer to Op
eration and Maintenance Manual for
more information.
i01798123
Engine Speed Does Not
Change
Note: Use t
his procedure only if the engine speed
does not change.
Probable Causes
•
Refer to lo
gged codes.
•
Throttle switch
•
Throttle position sensor
•
Engine spe
ed/timing sensor
Recommend
ed Repairs
Diagnostic Codes
Check for active diagnostic codes on the electronic
service tool. Troubleshoot any active codes before
continui
ng with this procedure.
If a problem with the throttle switch is suspected refer
to Troubl
eshooting, “Throttle Switch Circuit - Test”.
Refer to Troubleshooting, “Throttle Position Sensor
Circuit -
Test” if any of the following diagnostic codes
are active.