Maintenance4325−1/A1
Winterthur Gas & Diesel Ltd.
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3. Disassembly
1) Remove the eight screws (26, Fig.2) from the cover (9).
2) Turn the handwheel fully in. This will move the cover (9) out of the spindle (13).
3) Remove the handwheel (25), the cover (9) and the spring (11).
4) Use an AF 60 swan neck spanner to remove the spindle nut (14).
5) Remove the spindle (13).
6) Remove the two screws (30) from the valve guide (16).
7) Remove the valve guide (16).
8) Remove the valve body (18) together with the spring (17).
9) Remove the two bolts (28) from the control valve (19)
10) Remove the control valve (11) from the cover (2).
11) Remove the screw plug (32) together with the spring (23), valve (22) and piston (21)
from the control valve (19).
12) Remove the silencer (29).
4. Servicing
1) If necessary, clean the items from the control valve (19) that follow:
D Valve (22)
D Piston (21)
D Spring (23).
2) Remove the grease from the items of the shut-off valve that follow:
D Springs (11) and (17)
D Valve body (18)
D Valve guide (16)
D Valve (12)
D Spindle (13).
3) If you find corrosion on the springs (11, 17 and/or 23) 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 (20). If you find damage, replace the piston joint
ring.
6) Do a check of the valve seats (10) and (15). If necessary, grind the sealing surfaces.
2015
Shut-off Valve for Starting Air: Cleaning and Function Check
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