Komatsu PC130-8 User Manual

SEN04125-02 40 Troubleshooting
18 PC130-8
S-9 Oil becomes contaminated quickly 1
General causes why oil becomes contaminated quickly
q Entry of exhaust gas into oil due to internal wear
q Clogging of lubrication passage
q Use of improper fuel
q Use of improper oil
q Operation under excessive load
Causes
Defective seal at turbocharger turbine end Worn valve, valve guide Worn piston ring, cylinder Clogged breather, breather hose Clogged oil cooler Clogged oil filter Defective oil filter safety valve Clogged turbocharger lubrication drain tube Exhaust smoke is bad
Questions
Confirm recent repair history
Degree of use of machine Operated for long period EEE
Non-specified fuel is being used QQ
Oil must be added more frequently w
Metal particles are found when oil filter is drained QQ w
Inside of exhaust pipe is dirty with oil w
Engine oil temperature rises quickly w
Check items
Color of exhaust gas is
Blue under light load w
Black w
Amount of blow-by gas
Excessive QQw Q
None w
Troubleshooting
Excessive play of turbocharger shaft q
See S-7
When compression pressure is measured, it is found to be low qq
Check breather and breather hose directly q
Inspect oil cooler directly q
Inspect oil filter directly q
Spring of oil filter safety valve is hitched or broken q
Inspect turbocharger lubrication drain tube directly q
Remedy
Replace Replace Replace
Clean
Replace Replace Replace
Clean
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Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English