Starting Performance Is Poor - Komatsu PC210-8 Shop Manual

UEN00246-02
S-1 Starting performance is poor
General causes why starting performance is poor
Defective electrical system
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Insufficient supply of fuel
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Insufficient intake of air
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Improper selection of fuel
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a The common rail fuel injection system (CRI) recognizes the
fuel injection timing electrically. Accordingly, even if the
starting operation is carried out, the engine may not start
until the crankshaft revolves 2 turns at maximum. This phe-
nomenon does not indicate a trouble, however.
Confirm recent repair history
Degree of use of machine Operated for long period
Starting performance
Non-specified fuel is being used
Replacement of filters has not been carried out according to Operation and Mainte-
nance Manual
Engine oil must be added more frequently
When engine is preheated or when temperature is low, preheating monitor does not
indicate normally
During operation, charge level monitor indicates abnormal charge
Dust indicator is red
Air breather hole of fuel tank cap is clogged
Fuel is leaking from fuel piping
When priming pump is operated, it makes no reaction or it is heavy
Starting motor cranks engine slowly
While engine is cranked
with starting motor
When exhaust manifold is touched immediately after starting engine, temperature of
some cylinders is low
Engine does not pick up smoothly and combustion is irregular
There is hunting from engine (rotation is irregular)
Blow-by gas is excessive
Inspect air cleaner directly
When compression pressure is measured, it is found to be low
When air is bled from fuel system, air comes out
Inspect fuel filter, strainer directly
Carry out troubleshooting according to "Rail Press (Very) Low Error (*1)" indicated by
code
When a cylinder is cut out for reduced cylinder mode operation, engine speed does not
change
When starting switch is turned to HEAT, intake air heater mount does not become warm
Is voltage 20 – 30 V between alternator terminal B and terminal E with
engine at low idle?
When specific gravity of electrolyte and voltage of battery are measured, they are low
*1: Displayed failure codes [CA559] and [CA2249]
6
Became worse gradually
Engine starts easily when warm
If air bleeding plug of fuel filter is removed, fuel does not
flow out
If spill hose from injector is disconnected, little fuel spills
40 Troubleshooting
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Yes
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Remedy
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Causes
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PC210, 230, 240-8