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WCB_D4_D4SL_sch5_US.indd
D4 / D4 SL Schedule 5 Series
Double Seat Mix Proof Valves
Instruction Manual: US - rev. 1
Waukesha Cherry-Burrell
®
brand D4 / D4 SL Schedule 5 Valves
12. Maintenance of Actuator
The item numbers refer to the spare parts drawings in section 15,
starting on page 27.
12.1. Removing the actuator screws
1.
Remove the yoke cover and yoke.
2.
Unscrew the two actuator screws (19) with a SW36 socket wrench.
3.
Remove the V-seals (20) and O-rings (18).
12.2. Installing the seals and assembling the actuator
1.
Install the slightly greased O-rings (18) and V-seals (20) in the actuator
screws (19). Check the correct installation position of the V-seal (20).
Recommendation for actuator:
Pneumatic grease
25 ml /tube
- Part no. H164725
2.
Place the assembly tool (H338580) on the end of the piston rod. Screw
the actuator screws (19) with a socket wrench SW36 over the piston
rod at both sides of the actuator and fasten them.
3.
Re-install the yoke and yoke cover.
Actuator screw
20
18
fig. 12.: D4 Valve actuator
fig. 12.: D4 SL Valve actuator
Assembly tool
for actuator screw (H338580)
19
19
19
19
