Komatsu PC130-8 User Manual

40 Troubleshooting SEN04125-02
PC130-8
13
S-4 Engine stops during operations 1
*1: Displayed failure codes [CA559] and [CA2249]
General causes why engine stops during opera-
tions
q Internal parts of engine seized
q Insufficient supply of fuel
q There is overheating
q Defective hydraulic pump
Causes
Broken dynamic valve system (valve, rocker arm, etc.) Broken, seized piston, connecting rod Broken, seized crankshaft bearing Broken, seized gear train Insufficient fuel in tank Clogged air breather hole of fuel tank cap Leaking, clogged fuel piping Clogging of fuel filter Clogging feed pump gauze filter Broken, seized feed pump Broken supply pump shaft Stuck, seized supply pump plunger Broken auxiliary equipment (pump, compressor, etc.) Defective hydraulic pump Defective engine controller power supply wiring Defective starting switch wiring
Questions
Confirm recent repair history
Degree of use of machine Operated for long period EE
Condition when engine
stopped
Abnormal noise was heard and engine
stopped suddenly
wwww QwQw w
Engine overheated and stopped wQ Q
Engine stopped slowly wQQ QQ
There was hunting and engine stopped wQ QQQ QQ
Non-specified fuel is being used QQQ Q
Replacement of filters has not been carried out according to Operation
and Maintenance Manual
ww
Fuel level monitor indicates low level w
When fuel tank is inspected, it is found to be empty w
Air breather hole of fuel tank cap is clogged w
Fuel is leaking from fuel piping w
Check items
Rust and water are found when fuel tank is drained ww
Metal particles are found when oil pan is drained ww QQ
When engine is cranked by
hand
Does not turn at all ww
Turns in opposite direction w
Moves by amount of gear backlash ww
Supply pump shaft does not turn w
Engine turns, but stops when load is applied to machine w
Troubleshooting
Inspect dynamic valve system directly q
Carry out troubleshooting
on applicable machine
Inspect piston, connecting rod directly q
Inspect crankshaft bearing directly q
Inspect gear train directly q
Inspect fuel filter directly q
Inspect feed pump gauge filter directly q
Inspect feed pump directly q
Carry out troubleshooting according to “No-pressure feed by supply
pump (*1)” indicated by code
qq
Engine rotates when pump auxiliary equipment (pump, compressor,
etc.) is removed
q
Check controller power supply wiring q
Check starting switch wiring q
Remedy
Replace Replace Replace Replace
Add
Clean
Correct
Replace
Clean
Replace Replace Replace Replace
—
Correct Correct

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English