Perkins M250C - Excessive Fuel Consumption

KENR9126 55
Troubleshooting Section
4. If no oil leaks are identified, refer to “Engine
Crankcase Brea
ther”.
Engine Crankcase Breather
1. Check the engine crankcase breather for blockage
or restrictions.
2. Check for excessive oil from the outlet of the
breather.
3. Repair all defects. Verify that the repair has
eliminated the fault.
4. If no faults are found, refer to “Oil Level”.
Oil Level
1. Check the oil level in the engine.
2. If the oil level is high, check for contamination
of the oil with coolant. Refer to Troubleshooting,
“Coolant
in Engine Oil”.
3. If no contamination is identified, remove any
excess o
il.
4. If the oil level is sati sfactory, refer to “Air Intake
and Exha
ust System”.
Air Intake and Exhaust System
1. Check the air filter restriction indicator, if equipped.
2. Ensure
that the air filter is clean and serviceable.
3. Check the air intake and the exhaust system for
the fo
llowing defects:
•
Blockages
•
Restrictions
•
Dama
ge to the air intake and exhaust lines and
hoses
4. Make
all necessary repairs to the engine.
5. Ensure that the repairs have eliminated the
dia
gnostic code.
6. If no faults are found, refer to “Turbocharger”.
Turbocharger
No
te: The turbocharger that is installed on this
engine is a nonserviceable item. If any mechanical
fault exists, then the turbocharger must be replaced.
1. Check that the oil drain for the turbocharger is not
blocked or restricted.
2. Check the turbocharger for evidence of internal
oil leaks.
3. If necessary, replace the turbocharger.
4. Check that the repairs have eliminated the faults.
5. If the repair
s have not eliminated the fault proceed
to “Low Compression (cylinder pressure)”.
Low Compres
sion ( cylinder pressure)
1. Perform a compression test.
2. If low compression is noted on any cylinders,
investigate the cause and rectify the cause.
Possible causes of low compression are shown
in the following list:
•
Loose glow plugs
•
Faulty pi
ston
•
Worn piston rings
•
Worn cylinder bores
•
Worn val
ves
•
Faulty cylinder head gasket
•
Damaged cylinder head
3. Perfor
m all necessary repairs.
4. Ensure that the repairs have eliminated the faults.
i04010462
Excessive Fuel Consumption
Pro
bable Causes
•
Diagnostic codes
•
Misreading of fuel level
•
Fu
el quality
•
Quality of oil
•
Low engine temperature
•
Pr
olonged operation at idle speed
•
Engine operating speed
•
Air intake and exhaust system