KENR6933 65
Troubleshooting Section
Oil Specification
1. Make sure that engine oil of the correct
specification is used. Refer to the Operation
and Maintenan
ce Manual, “Refill Capacities and
Recommendations”.
2. If necessary,
drain the oil system and refill the oil
system with engine oil of the correct specification.
Refer to Operation and Maintenance Manual,
“Engine Oil a
nd Filter - Change”.
3. If the fault is still apparent, refer to “Engine Oil
Pressure Gau
ge”.
Engine Oil Pressure Gauge
1. Check the actual engine oil pressure with a
calibrated test gauge. Compare the oil pressure
reading from
the electronic service tool to the
pressure on the test gauge.
2. If no differ
ence is noted between the indicated oil
pressures, refer to “Engine Oil Filter”.
Engine Oil F
ilter
1. Remove the engine oil filter. Refer to the Operation
and Mainten
ance Manual, “Engine Oil and Filter
- Change”.
2. Inspect the
engine oil filter for evidence of
blockage.
3. Install a ne
w engine oil filter. Refer to the
Operation and Maintenance Manual, “Engine Oil
and Filter - Change”.
4. If the fault is still apparent, refer to “Engine Oil
Cooler”.
Engine Oil Cooler
1. If oil flow o
r coolant flow through the oil cooler
is suspected of being low, replace the oil cooler.
Refer to Disassembly and Assembly, “Engine
Oil Coole
r - Remove” and Disassembly and
Assembly, “Engine Oil Cooler - Install”.
2. If the fau
lt is still apparent, refer to “Piston Cooling
Jets”.
Piston Co
oling Jets
1. Inspect the piston cooling jets for damage.
Replace a
ny piston cooling jet that appears to be
cracked, broken or missing. Refer to Disassembly
and Assembly, “Piston Cooling Jets - Remove
and Inst
all”.
2. If no damage is found, refer to “Engine Oil Suction
Tube”.
Engine Oil Suction Tube
1. Check the inlet screen on the oil suction tube
and remove any material that may be restricting
oil flow.
2. Check the joints of the oil suction t ube for cracks
or a damaged jo
int that may allow air leakage into
the supply to the oil pump.
3. If no faults ar
e found, refer to “Engine Oil Pump”.
Engine Oil Pump
1. Inspect the components of the engine oil pump for
excessive wear. Repair the oil pump or replace
the oil pump,
if necessary. Refer to Disassembly
and Assembly, “Engine Oil Pump - Remove”,
Disassembly and Assembly, “Engine Oil Pump -
Install” and
Disassembly and Assembly, “Engine
Oil Relief Valve - Remove and Install”.
2. If no faults
are found, refer to “Bearing Clearance”.
Bearing C learance
Inspect the engine components for excessive bearing
clearance or damaged bearings. If necessary,
replace the
bearings and/or the components. Inspect
the following components for excessive bearing
clearance:
•
Crankshaft main bearings
•
Connecting
rod bearings
•
Camshaft front bearing
•
Idler gear bearing
i02535524
Low Power/Poo r or No
Response to T hrottle
Probable Causes
•
Diagnostic codes
•
ECM parameters
•
Electrical connectors
•
Air intake and exhaust system
•
Valve lash
•
Turbocharger
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