Operation6735−1/A1
Winterthur Gas & Diesel Ltd.
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3.2 Pressure Check
You use the pressure reducing valve (9, Fig. 2) to adjust the pressure that opens the
waste gate valve.
1) Operate the engine at approximately 50% load (when the scavenge air pressure
is more than 1.0 bar).
Note: For the pressure that opens the valve, see Table 1.
2) Connect a pressure gauge to the test connections (13, 14) (scavenge air
pressure is more than 1.0 bar).
3) Energize the solenoid valve (8) (this simulates low temperature in the air intake).
4) If the pressure gage shows a pressure difference, do as follows:
a) Loosen the locknut (19).
b) Turn the adjustment screw (12) to adjust the pressure that opens the waste gate
valve.
c) Tighten the locknut (19).
4. Function Check
You must do the function checks at regular intervals during engine operation. Also,
you must do these function checks before voyages in regions of arctic conditions.
1) At an engine load of approximately 50%, energize the solenoid valve (8).
2) Make sure that the waste gate valve opens.
Note: When the waste gate opens, scavenge air flows through the silencer.
If a malfunction in the waste gate occurs, you must do an overhaul as soon as
possible. See the Maintenance Manual 6735−1.
2017−08
Scavenge Air Waste Gate
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