Oil Is In Coolant (Or Coolant Spurts Back Or Coolant Level Goes Down) - Komatsu PC130-8 Shop Manual

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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
q
q Internal leakage in cooling system
Confirm recent repair history
Degree of use of machine
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 directly
Pressure-tightness test of oil cooler shows there is leakage
20
Operated for long period
Suddenly rose
Gradually rose
40 Troubleshooting
1
Causes
E E
Q Q
Q Q
Q Q
Q Q w
w
q
q q
q
Remedy
PC130-8