Maintenance4325−1/A1
Winterthur Gas & Diesel Ltd.
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3. Disassemble
1) Remove the six screws (6, Fig. 2) from the cover.
2) Turn the handwheel (3) fully in. This will move the cover from the spindle (5).
3) Remove the handwheel (3) and the cover.
4) Remove the spring (8) together with the valve (9) and the spindle (5).
5) Remove the valve (9).
6) Remove the two screws (12) from the valve guide (10).
7) Remove the stopper (11) together with the spring (14) and valve body (15).
8) Remove the silencer (23) and its gasket.
9) Remove the two bolts (4) from the control valve (2).
10) Remove the screw plug (19), together with the spring (20), valve (21) and
piston (22).
11) Remove the control valve (2) from the cover.
4. Servicing
1) If necessary, clean the items of the control valve (2) that follow:
D Valve (21)
D Piston (22)
D Spring (20).
2) If necessary, clean the items from the shut-off valve that follow:
D Springs (8) and (14)
D Stopper (11)
D Valve body (15)
D Valve guide (10)
D Valve (21)
D Spindle (5).
3) If you find corrosion on the springs (8, 14 and/or 20) you must replace them.
4) Do a check of all gaskets and O-rings that you removed for damage. If you find
damage, replace the applicable gaskets and/or O-rings.
5) Do a check of the piston joint ring (18). If you find damage, replace the piston
joint ring.
6) Do a check of the valve seat (16). If necessary, grind the sealing surfaces.
2016
Starting Air Shut-off Valve: Clean and Function Check
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