SHOP MANUAL MT26-31 - 06.2005
Engine
Tier-3 710655-
Ch 1 page 148
Blue smoke
Fuel in the oil
Black smoke on starting
Engine difficult to start Binding control rack
Open the cover on the
actuator solenoid and
check with a finger on
the control rod that it
goes to the maximum
stop bracket.
Take the pump to a
Bosch workshop for
repair
Effect Cause Troubleshooting Action
Oil coating past piston
rings
Oil leakage in turbo-
charger
Damaged piston cool-
ing nozzles
Petrol in diesel oil
Change damaged
nozzles
Effect Cause Troubleshooting Action
Dilution of oil in sump
Unburnt fuel passes
the piston
Defective injector
Internal leakage in
injection pump (worn
pump element or crack
in pump housing)
Frequent cold starts
Normally about 1% of
fuel in the lubricating oil
per 200 h
Worn/broken O-ring at
feed pump pushrod
Effect Cause Troubleshooting Action
Worn engine
Intake valve not open-
ing
Check “blow-by” in crankcase
Correct value for new engine: 0 - +10 mm wc
(flow rate 60 - 100 l/min.)
Closed crankcase ventilation: -50 - +20 mm wc
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