10.2.6 Malfunctions of the exhaust gas system (XX37NN)
Tab 10-37 Exhaust gas temperature downstream of a cylinder is too high
Indication Possible cause Procedure
TE3701-nnA The scavenge air flow is too low
•
Clean the turbocharger.
•
Clean the air flaps in the scavenge air re-
ceiver.
•
Clean the scavenge ports.
This is a result of the malfunction in
Table 10-3 - Cylinder cooling water
temperature downstream of a
cylinder is too high
•
Do the repair shown there.
There is air in the cooling water
system
•
Open the vent valves of the cooling water
system.
An injection nozzle is defective
•
Repair or replace the defective injection
nozzle.
The injection time is too long
•
Find the cause and repair the fault.
There are leaks in the cooling water
system (for example cracks in a
cylinder liner)
•
Find the cause and repair the fault.
There is a fire in the piston under-
side
•
Do the procedure in section 2.3 Fire-fighting
in the scavenge air space.
Tab 10-38 Exhaust gas temperature difference downstream of all cylinders is too high
Indication Possible cause Procedure
TE3701-nnA An injection nozzle is defective
•
Repair or replace the defective injection
nozzle.
The fuel supply system is defective
•
Find the cause and repair the fault.
An exhaust valve is defective
•
Repair or replace the defective exhaust
valve.
Tab 10-39 Exhaust gas temperature upstream of a turbocharger is too high
Indication Possible cause Procedure
TE3721-nnA This is a result of the malfunction in
Table 10-37 - Exhaust gas temper-
ature downstream of a cylinder is
too high
•
Do the repair shown there.
X92-B
AA00-0000-00AAA-410C-A
Operation Manual Malfunctions of systems and components
Winterthur Gas & Diesel Ltd.
- 330 - Issue 002 2021-11
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