SPX FLOW W71, Instruction Manual, Page: 37 / 64

Waukesha Cherry-Burrell Brand W71/W72RS Sch. 5 Mix Proof Valves Maintenance
08/2018 95-03091 Page 37
Reassembly of Valve
Stems
Figure 38 - Assembly
A
B
NOTE: Perform maintenance on stems and adapter bearings and
O-rings while the stems are removed from the actuator and
before reassembly.
Upper Stem Assembly
1. Apply Bostik
®
Never-Seez White Food Grade with PTFE or
equivalent to the threads of the upper stem.
2. Screw the upper stem clockwise into the actuator. Hold the
adjusting sleeve stationary with a spanner or allen wrench.
3. Screw the upper stem in until the scribe line (Figure 38, item
A) within the etch mark adjustment zone (item B) aligns with
the bottom of the adjustment sleeve. This is the factory-set
lower seat clean position. See “Seat Cleaning Adjustment” on
page 25 for instructions on modifying the seat clean
movement.
Maintenance Video 6: Upper stem reassembly into valve
WARNING
Do not screw the upper stem all the way into the actuator, as
internal O-ring damage may result.
Lower Stem Assembly
1. Apply Bostik
®
Never-Seez White Food Grade with PTFE or
equivalent to the threads of lower stem.
2. If the valve has external flush, slide the spray bushing onto
the inner stem of the lower stem.
3. Screw the lower stem clockwise into the actuator until metal-
to-metal contact stops.
4. Using an open-end wrench and rubber hammer, rap the
lower stem to lock the threads into place within the actuator.
Maintenance Video 4: Lower stem reassembly into valve