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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
q
Internal leakage in cooling system
q
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, oil is milky
There are excessive air bubbles in radiator, coolant spurts back
Hydraulic oil on applicable machine side is milky
When hydraulic oil on applicable machine side is drained, water is found
Pressure-tightness test of cylinder head shows there is leakage
Inspect cylinder block, liner directly
Pressure-tightness test of oil cooler shows there is leakage
PC210, 230, 240-8
Suddenly increased
Gradually increased
UEN00246-02
Causes
E E
Q
Q
Q Q
Q Q
Q Q w
w
q
troubleshooting
q q
on applicable
q
machine side
Remedy
Q
w
w
Carry out
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19
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Table of Contents
Troubleshooting
