Operation
0820−1/A1
Winterthur Gas & Diesel Ltd.
7/ 7
6. Exhaust Waste Gate
The exhaust waste gate is defective, low-load tuning causes too much thermal load
on the engine, or a scavenge air pressure that is too high.
Problem Possible Causes Procedure
The engine has too much
thermal load
(a slow-down signal is
released)
The butterfly valve stays in the OPEN posi-
tion at a load range of less than 85%.
Adjust the screw for manual
operation on the solenoid
valve ZV7076C (see 8135−1,
paragraph 3 and Fig. 2)
Do an overhaul and replace
the butterfly valve
As a temporary solution,
install a blind flange in
exhaust bypass and operate
engine only up to 85% load
The scavenge air pressure is
too high
(a slow-down signal is
released)
The butterfly valve stays in the CLOSED
position at a load range of more than 85%.
Do an overhaul and replace
the butterfly valve
Do a check of the function of
the solenoid valve ZV7076C.
If necessary, do an overhaul
or replace the solenoid valve.
As a temporary solution,
operate the engine only up to
85% load
2014
Irregular Operation
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