Maintenance
4325−1/A1
Winterthur Gas & Diesel Ltd.
5/ 6
24) Attach the inlet flange and pipe (not
shown) to the shut-off valve with the
eight M24x50 bolts (9).
25) Torque the eight M24x50 screws to the
value given in 0352−2, paragraph 1.
26) Connect the check pipe (10) to the pipe
connection.
27) Connect the control air pipe (9) to the
pipe connection.
28) Connect the drain pipe (3) to the pipe
connection.
6. Shut-off Valve − Test
6.1 Initial Position
WARNING
Injury Hazard: During this
test, do not select START.
Injury to personnel can
occur.
WARNING
Injury Hazard: During this
test, do not go near open
bores. High-pressure air
can come out of the bores
and cause injury.
Note: You must only do this test on a fully assembled engine that is ready to
start.
1) Make sure that the stop valves on the starting air bottles 9.01 are closed.
2) Operate the handwheel to move the shut-off valve to the position CLOSED.
3) Close the vent valve 2.21.
4) Disengage the turning gear.
6.2 Test Procedure
1) Close vent valve 2.27 in the main starting air pipe.
2) Slowly open the stop valve on the starting air bottles 9.01.
3) Slowly open the screw plug (5). Make sure that no air flows out.
Note: If air flows out, tighten the screw plug (5). The shut off valve is not
airtight.
4) Remove the screw plug (5).
5) Slowly turn the handwheel to move the shut-off valve to the position OPEN.
6) Make sure that air flows from the bore of the screw plug (5). When air flows, the
manual function of the shut-off valve operates correctly.
2016
Starting Air Shut-off Valve: Clean and Function Check
WCH03534
1
2
3
6
I
I
13
13
10
11
AO
12
9
Fig. 3
4
5
2.0 mm to
5.0 mm
87
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