Komatsu PC200-8M0 Shop Manual page 930

SEN06140-00
b) Engine cranks but no exhaust smoke comes out
General causes why engine cranks but no exhaust smoke comes out
q
Fuel is not being supplied.
q
Supply of fuel is extremely small.
q
Improper selection of fuel (particularly in winter)
Check recent repair history.
Machine opera-
Operated for long period
tion hours
Exhaust smoke suddenly stopped coming out (at restarting after short time
stoppage).
Fuel other than specified one is used
Filters are not replaced as indicated in the Operation and Maintenance
Manual.
Fuel tank is found to be empty.
Air breather hole in 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.
Even if air bleeding plug in fuel filter head is removed, fuel
When engine is
does not flow out.
cranked with
Even if spill hose from injector is disconnected, little fuel
starting motor,
spills.
When air is bled from fuel system, air comes out.
Check fuel filter.
Check feed pump.
Perform troubleshooting for "Supply pump pressure low error" according to
failure code (*1).
Perform troubleshooting for the error "IMV/IMA short or open circuit" accord-
ing to failure code (*2).
Check pressure relief valve.
Fuel flows out when pressure limiter return piping is disconnected.
*1: Failure codes [CA559] and [CA2249]
*2: Failure codes [CA271] and [CA272]
8
40-600
600 Troubleshooting of engine (S-mode)
S-2 Engine does not start
E E
w
w
w
w
Q E
w w
w
w Q
Q Q
Q
q
q
Remedy
PC200, 200LC, 220, 220LC-8M0
Cause
w Q w w
E
E E
w Q
w w w Q
q
q q
q
q
q