Komatsu PC200-8M0, Shop Manual, Page: 931 / 1254

SEN06140-00
PC200, 200LC, 220, 220LC-8M0 40-600
9
600 Troubleshooting of engine (S-mode)
S-2 Engine does not start
*1: Failure codes [CA559] and [CA2249]
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
Cause
Clo
gged
a
ir cl
eane
r e
lement
W
o
rn valve system
(valve
, rocker lever
,
etc.)
W
o
rn piston ring
o
r
cylin
der
Use of
im
p
rope
r fuel
Clo
gged
a
ir
b
reather hol
e in fuel t
ank cap
Leakage
or clogging
of fuel pi
ping or air in the fuel system
Clo
ggin
g
of fuel
filter
S
tu
c
k or seized
su
pply pump
pl
ung
er
Clo
gged
i
n
jectio
n n
o
zzle,
or d
e
fective
spray
Defective or deterio
ra
te
d battery
Defective cool
ant
tempe
ratur
e sensor or wiring
h
a
rness
Defective int
a
ke
air heater system
Question
s
Check recent repair history.
Machine operation
hours
Operated for long period
E E E
Suddenly become unstartable.
w w Q
Fuel other than specified one is used
Q Q
Filters are not replaced as indicated in the Operation and Maintenance Man-
ual.
w w
Oil must be added more frequently
w
When engine is preheated or when temperature is low, preheating monitor
does not indicate proper function of preheating system.
w
Dust indicator indicates a red zone
w
Air breather hole of fuel tank cap is clogged.
Q
Rust and water are found when fuel tank is drained.
w
There is no fuel in the removal fuel filter.
w
Fuel is leaking from fuel piping.
w
When priming pump is operated, no resistance is felt or it is heavy.
w Q
Starting motor cranks engine slowly.
w
Check items
When engine is running, unusual noise is heard around cylinder head.
w
When engine is
cranked with start-
ing motor,
Even if air bleeding plug in fuel filter head is removed, fuel
does not flow out.
Q w
Even if spill hose from injector is disconnected, little fuel
spills.
w
When exhaust manifold is touched immediately after starting engine, tempera-
ture of some cylinders is low.
w
T
roub
lesho
o
ting
Check air cleaner.
q
Check valve system.
q
When compression pressure is measured, it is found to be low.
q
When air is bled from fuel system, air comes out.
q
Check fuel filter.
q
Perform troubleshooting for "Supply pump pressure low error” according to
failure code (*1).
q
Specific gravity of electrolyte and voltage of battery are low.
q
Coolant temperature gauge indication is not correct.
q
Even if starting switch is turned to HEAT, intake air heater mount does not
become warm.
q
Remedy
Cl
ean
Re
place
Re
place
Re
place
Cl
ean
Re
p
a
ir
Re
place
Re
place
Re
place
Re
place
Re
place
Re
place