Operation6735−1/A1
Winterthur Gas & Diesel Ltd.
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3.2 Pressure Check
You use the pressure control valve 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 (12, 22) (scavenge air
pressure is more than 1.0 bar).
3) Energize the solenoid valve (20, Fig. 2) (this simulates low temperature in the air
intake).
4) If the pressure gauge shows a pressure difference, do as follows:
a) On the pressure control valve (1), lift up the adjustment knob (24) to unlock.
b) Turn the adjustment knob (24) to adjust the pressure that opens the waste gate
valve.
c) Push down the adjustment knob (24) to lock.
4. Function Check
You must do the function checks at six-monthly 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 (19, Fig.).
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. Refer to the Maintenance Manual 6735−1.
2015−03
3
Scavenge Air Waste Gate
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