Engine Stops During Operation - Komatsu PC200-8M0 Shop Manual

600 Troubleshooting of engine (S-mode)
S-4 Engine stops during operation
S-4 Engine stops during operation
General causes why engine stops during operation
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Internal parts of engine seized
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Insufficient supply of fuel
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Engine overheating
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Defect in hydraulic pump
Check recent repair history.
Machine operation
hours
Condition when
engine stopped
Fuel other than specified one is used
Filters are not replaced as indicated in the Operation and Mainte-
nance Manual.
Fuel level monitor indicates low level.
Fuel tank is found to be empty.
Air breather hole in fuel tank cap is clogged.
Fuel is leaking from fuel piping.
When priming pump is operated, no resistance is felt or it is
Rust and water are found when fuel tank is drained.
Metal particles are found in oil drained from oil pan.
When engine is
rotated by hand:
Engine operates, but stops when load is applied from machine.
Check valve system.
Check piston and connecting rod.
Check crankshaft bearing.
Check gear train.
Check fuel filter.
Check feed pump gauze filter.
Check the feed pump.
Perform troubleshooting for "Supply pump pressure low error"
according to failure code (*1).
Engine operates if auxiliary equipment (pump, air compressor,
etc.) is removed.
Check engine controller power supply wiring.
Check starting switch wiring.
*1: Failure codes [CA559] and [CA2249]
PC200, 200LC, 220, 220LC-8M0
Operated for long period.
Unusual noise was heard and engine
stopped suddenly.
Engine overheated and stopped.
Engine stopped slowly.
Engine hunted and stopped.
It does not rotate at all.
It rotates only in opposite direction.
Crankshaft moves by amount of gear
backlash.
Supply pump shaft does not turn.
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Remedy
SEN06140-00
Cause
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40-600
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11