Perkins M250C - Engine Has Early Wear

KENR9126 47
Troubleshooting Section
Glow Plugs
Note: Faulty glow plugs will only affect engine starting
when the ambient temperature is below 5° C (41° F).
1. Check the operation of the glow plugs.
2. If necessary
, replace faulty glow plugs.
3. Attempt to start the engine. If the engine will not
start, proc
eed to “Valve Lash”.
Valve Lash
1. Check the valve lash.
2. Attempt to
start the engine. If the engine will not
start, proceed to “Low Compression (Cylinder
Pressure)”.
Low Compression (Cylinder Pressure)
1. Perform a
compression test.
2. If low compression is noted on any cylinders,
investi
gate the cause and rectify the cause.
Possible causes of low compression are shown
in the fo
llowing list:
•
Loose glow plugs
•
Faulty piston
•
Faulty
piston rings
•
Worn cylinder bores
•
Worn valves
•
Fault
y cylinder head gasket
•
Damaged cylinder head
3. Perform all necessary repairs.
4. Ensu
re that the repairs have eliminated the fault.
i04
010444
Engine Ha s Early Wear
No
te: This is not an electronic system fault.
P
robable Causes
•
Multiple starts or cold operation
•
Incorrect maintenance intervals
•
Dirt in engine oil
•
Incorrect oil
•
Contaminated
oil
•
Leaks in air intake system
•
Dirt in fuel
•
Low oil pres
sure
Recommende
dActions
Multiple Starts or Cold Operation
Frequent starting and stopping of the engine can
cause early wear. Also, operation of the engine for
short peri
ods of time in cold conditions can cause
early wear.
Incorrec
t Maintenance Intervals
If the engine is not correctly maintained, early wear
will occu
r.
Make sure that the engine is maintained at the
correct
maintenance intervals.
Dirt in Engine Oil
1. Drain the oil from the crankcase and refill the
crankcase with clean engine oil. Install new engine
oil filt
ers.
Incorrect Oil
1. Check that the engine is filled with oil of the correct
specification.
2. If necessary, drain the engine oil system and refill
the engine oil system.
Contaminated Oil
Chec
k an oil sample for contamination with fuel. If
contamination is found, investigate the cause.
Lea
ks in Air Intake System
A leak in the air intake system may allow unfiltered
air
into the engine. Inspect the air intake system for
streaks which may indicate a leakage of unfiltered
air. Inspect all of the gaskets and the connections.
Re
pair any leaks.
Dirt in Fuel
1. Remove the fuel filters. Inspect the fuel filters for
contamination. Install new fuel filters. Determine
t
he cause of the contamination.