Oil Is In Coolant (Or Coolant Spurts Back Or Coolant Level Goes Down) - Komatsu Galeo PC800-8 Shop Manual

40 Troubleshooting
S-11 Oil is in coolant (or coolant spurts back or coolant level goes down)
General causes why oil is in coolant
• Internal leakage in lubrication system
• Internal leakage in cooling system
Confirm recent repair history
Degree of use of machine Operated for long period
Oil level
Hard water is being used as coolant
Oil level has risen and oil is milky
There are excessive air bubbles in radiator, coolant spurts back
Pressure-tightness test of cylinder head shows there is leakage
Inspect cylinder block, liner directly
Inspect cylinder liner directly
Pressure-tightness test of oil cooler shows there is leakage
PC800, 850-8
Suddenly increased
Gradually increased
Causes
E
Q
Q Q
Q
Q Q
w w
q
q q
q
Remedy
SEN00795-02
E
Q
Q
w
q
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