Komatsu Galeo PC800-8 User Manual

24 PC800, 850-8
SEN00795-02 40 Troubleshooting
S-13 Oil level rises (Entry of coolant/fuel)
General causes why oil level rises
• Coolant in oil (milky)
• Fuel in oil (smells diluted diesel fuel)
aIf oil is in coolant, carry out troubleshooting for “S-11 Oil is in coolant”
Causes
Cracked EGR cooler (Entry of coolant) Broken cylinder head, head gasket Fuel leakage inside head cover Cracks inside cylinder block Damaged cylinder liner O-ring, holes caused by pitting Worn, damaged rear oil seal Broken oil cooler core, O-ring Clogged water pump drain hole (breather hole), defective seal Defective thermostat seat Defects in supply pump
Questions
Confirm recent repair history
Degree of use of
machine
Operated for long period EE E
Fuel must be added more frequently ww
Coolant must be added more frequently QQ w
There is oil in coolant QQQw
Oil smells of diesel fuel ww
Oil is milky QQ w
When engine is started, drops of water come from muffler QQ
Check items
When radiator cap is removed and engine is run at low idle, an abnormal num-
ber of bubbles appear, or coolant spurts back
wQ
Exhaust smoke is white QQ
Water pump drain hole (breather hole) is clogged w
When water pump drain hole (breather hole) is cleaned, coolant comes out w
Oil level in clutch or damper chamber of machine is low w
Troubleshooting
When EGR cooler outlet gas piping is removed, coolant containing antifreeze
flows out (*1)
q
When compression pressure is measured, it is found to be low q
Remove and inspect head cover directly q
Inspect cylinder block, liner directly qq
Inspect rear oil seal directly q
Pressure-tightness test of oil cooler shows there is leakage q
Remove and inspect water pump directly q
Remove and inspect thermostat cover directly q
Remove and inspect supply pump directly q
Remedy
Replace Replace Correct Replace Replace Correct Replace Replace Correct Replace

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English