Moxy MT 26 - High Exhaust Temperature; Low Charge Air Pressure

SHOP MANUAL MT26-31 - 06.2005
Engine
Tier-3 710655-
Ch 1 page 164
Low charge air pressure
Effect Cause Troubleshooting Action
Dirty/damaged turbine/
compressor wheel in
turbocharger
Leakage between
turbocharger and cylin-
der head
Bearing seizure in
turbocharger
Clogged air filter
High exhaust counter-
pressure
High fuel temperature
Check bearing play
Check the vacuum be-
fore the turbocharger,
max. 500 mm wc
Take a reading, recommended counterpressure:
500 mm wc, max. 1000 mm wc
Check silencer, spark arrester, length and inside
diameter of exhaust pipe
Check/change gaskets
Recondition/change
turbocharger
Check/clean
High exhaust temperature
Effect Cause Troubleshooting Action
Adjusted injection
pump
Wrong injection timing
Nozzle drips
High exhaust counter-
pressure
High inlet air tempera-
ture
Low charge air pres-
sure
Clogged air filter
Check the lead seal,
check CRO if neces-
sary
Check the injection
timing
Check type, opening
pressure and general
condition
Test in test bench
Take a reading, recommended counterpressure:
500 mm wc, max. 1000 mm wc
Check silencer, spark arrester, length and inside
diameter of exhaust pipe