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Pilot Valve Spool Removal & Replacement
1.
Close the manual inlet isolation valve, the manual outlet isolation valve, and any external source of pressure to
the pilot valve assembly. Follow the instructions on
ing.
2.
Disconnect the power to the MVP controller.
3.
Manually rotate the position dial on the pilot valve clockwise to position #1 to relieve pressure. Allow the flow of
water to drain to stop before proceeding.
4.
Remove the panhead retaining screw located at the bottom front portion of the pilot valve body (refer to Figure
96). Grasp the position dial and pull the pilot valve spool assembly from the pilot valve body.
5.
A retaining clip on the rear of the position dial secures the pilot valve spool assembly to the position dial. Using
a screw driver, gently pry the retaining clip off of the pilot valve spool.
6.
LIGHTLY lubricate all seals on the replacement pilot valve spool with Dow Corning #11 silicone grease and
assemble the position dial onto the pilot valve spool assembly.
NOTE
When inserting the pilot valve spool assembly on to the position dial, the larger flat portion of the pilot
valve spool assembly must align with the ALIGN TO FLAT indicating arrow.
7.
Insert the new pilot valve spool assembly into the pilot valve body. Make sure that the #1 on the position dial
aligns with the pilot valve body position indicator arrow.
8.
Replace the small panhead retaining screw to secure the pilot valve spool assembly into the pilot valve body.
Open the manual inlet isolation valve.
9.
With the pilot in position #1, bleed the air from valves 1 and 4 of the Brunermatic valve. Allow Backwash to con-
tinue for 10 minutes.
10. Slowly rotate the position dial clockwise to the H position. Bleed the air from valves 2, 5, 6, and 17 of the
Brunermatic valve.
11. Once the system has been repressurized, open the manual outlet isolation valve, and manual separate source
isolation valve (if installed). Close the external by-pass valve and restore power to the MVP controller.
Cat. No. 01016449
page 55
for depressurizing the system before proceed-
Retaining
Screw
Figure 96.
Service
59
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