Komatsu PC200-8M0 Shop Manual page 931

600 Troubleshooting of engine (S-mode)
S-2 Engine does not start
c) Exhaust smoke comes out but engine will not start (fuel is injected)
General causes why exhaust smoke comes out but engine does not start
q
Lack of cranking force due to defective electrical system
q
Insufficient supply of fuel
q
Insufficient intake of air
q
Improper selection of fuel
Check recent repair history.
Machine operation
Operated for long period
hours
Suddenly become unstartable.
Fuel other than specified one is used
Filters are not replaced as indicated in the Operation and Maintenance Man-
ual.
Oil must be added more frequently
When engine is preheated or when temperature is low, preheating monitor
does not indicate proper function of preheating system.
Dust indicator indicates a red zone
Air breather hole of fuel tank cap is clogged.
Rust and water are found when fuel tank is drained.
There is no fuel in the removal fuel filter.
Fuel is leaking from fuel piping.
When priming pump is operated, no resistance is felt or it is heavy.
Starting motor cranks engine slowly.
When engine is running, unusual noise is heard around cylinder head.
Even if air bleeding plug in fuel filter head is removed, fuel
When engine is
does not flow out.
cranked with start-
Even if spill hose from injector is disconnected, little fuel
ing motor,
spills.
When exhaust manifold is touched immediately after starting engine, tempera-
ture of some cylinders is low.
Check air cleaner.
Check valve system.
When compression pressure is measured, it is found to be low.
When air is bled from fuel system, air comes out.
Check fuel filter.
Perform troubleshooting for "Supply pump pressure low error" according to
failure code (*1).
Specific gravity of electrolyte and voltage of battery are low.
Coolant temperature gauge indication is not correct.
Even if starting switch is turned to HEAT, intake air heater mount does not
become warm.
*1: Failure codes [CA559] and [CA2249]
PC200, 200LC, 220, 220LC-8M0
Cause
E
w
w
w
w
Q
w
w
w Q
w
Q
q
q
q
q
Remedy
SEN06140-00
E E
w Q
Q Q
w
w
w
w
w
w
w
q
q
q
q
q
9
40-600