Komatsu 95-2 Series User Manual

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95-2 SERIES
TROUBLESHOOTING S-13
S-13 Oil level rises (water, fuel in oil)
fl If there is oil in the cooling water, carry out
troubleshooting for “Oil is in cooling water”.
General causes why oil level rises
• Water in oil
• Fuel in oil (diluted, and smells of diesel fuel)
• Entry of oil from other component
Confirm recent repair history
Degree of use of machine Operated for long period
There is oil in radiator cooling water
Exhaust smoke is white
When engine is first started, drops of water come from muffler
Leave radiator cap open. When engine is run at idling, an
abnormal number of bubbles appear, or water spurts back
Water pump breather hole is clogged with mud
When water pump breather hole is cleaned, water comes out
Oil level goes down in clutch, TORQFLOW transmission or
damper chamber
Oil level goes down in hydraulic tank
Engine oil smells of diesel fuel
Fuel must be added more frequently
Broken oil cooler core, O-ring
Defective nozzle holder sleeve
Broken cylinder head, head gasket (precombustion chamber)
Clogged water pump breather hole, defective seal
Worn, damaged rear seal surface
Defective main pump seal
Leakage of fuel inside head cover
Defective part inside fuel injection pump (flange type)
Defective thermostat seat portion
Damaged liner O-ring, holes made by pitting Cracks inside cylinder block
Questions
Check items
Pressure-tightness test of oil cooler shows there is leakage
Pressure-tightness test of cylinder head shows there is leakage
When compression pressure is measured, it is found to be low
Remove water pump and inspect directly
Remove rear seal and inspect directly
When main pump is removed, seal is found to be damaged
Remove head cover and inspect directly
Remove fuel injection pump and inspect directly
Defective contact of thermostat seal valve
Remove oil pan and check directly
Troubleshooting
Causes
Remedy
Replace Replace Replace Replace Correct Replace Correct Replace Replace Replace Replace
Legend
: Possible causes (judging from Questions and check items)
: Most probable causes (judging from Questions and Check items)
: Possible causes due to length of use (used for a long period)
: Items to confirm the cause.
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Komatsu 95-2 Series Specifications

General

Brand	Komatsu
Model	95-2 Series
Category	Engine
Language	English