
Waukesha Cherry-Burrell Brand W71/W72RS Sch. 5 Mix Proof Valves
Maintenance
08/2018
95-03091
Page 29
Radial Seat Ring
Replacement (for W72RS
Lower Stem)
1. Remove the lower stem radial seal by carefully prying up and
cutting the O-ring. Do not scratch or nick the metal seating
surface.
Maintenance Video 11: Radial Seal Removal
2. Clean the radial seal groove after removal.
3. Ensure that the vent port in the back of the groove is clean
and unblocked.
4. Lubricate the O-ring seal and expand it over the stem groove.
5. Place the assembly tool over the stem, ensuring proper tool
orientation. Extrude the O-ring seal into the groove by evenly
tightening the cap screws on the installation tool.
6. Remove the tool. The dovetail groove permanently retains
the O-ring seal.
Maintenance Video 12: Radial Seat Ring Replacement
For a list of installation tools, see Figure 29 below and
“Installation Tools” on page 57.
Figure 28 - Radial Seal Installation
1
2
3
VA100-507
Figure 29 - Radial Seal Insertion Collar Tool (for W72RS Valves)
VA100-664
Valve Size
2"
3"
4"
Part No.
Valve Size
6"
Part No.