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XIX. Reassembly of Pilot Valve (Cont.)
Top Plate
Figure 37: Top Plate (39PV37)
5.
Insert the four Cap Screws (Top Plate) through the Top
Plate and thread into the Pilot Base. Tighten to 25±2 ft-
lbs (34±2.7 N-m).
a. If removed, thread Compression Screw Lock Nut
clockwise onto Compression Screw.
6.
Thread Compression Screw into top of Bonnet until the
bearing point begins to protrude through Bonnet.
7.
Place Spring Washers on the ends of the Spring. There
is not a top or bottom Spring Washer unless the Lifting
Lever option is installed.
8.
If pilot has Lifting Lever Option:
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Spring Seal
(Main Piston)
a. Place Spring over Lifting Stem and place on Bottom
Spring Washer.
b. Place Top Spring Washer on top of Spring and then
place the entire assembly on top of Pilot Base
assembly ensuring that the spherical radius located
on the Bottom Spring Washer engages with spherical
nose on Main Piston.
9.
Install the Bonnet over the Spring and Spring Washer
Assembly. Thread the Bonnet onto the Top Plate. Tighten
wrench tight. Install and tighten Set Screw.
10. Turn Compression Screw clockwise until dimension has
been reached that was noted during disassembly.
11. Tighten Compression Screw Lock Nut wrench tight.
12. For Lifting Lever Option, reinstall Release Nut and Release
Lock Nut onto Lifting Stem. Turn clockwise until it
matches the dimension noted during disassembly.
13. Install Filter Plug into Bonnet vent hole (if removed).
Install Pipe Plug (Pilot Valve) in port above vent hole (if
removed).
Refer to Field Test Connection / Backflow Preventer Option
(Section XXII.A) for reassembly of Field Test Connection.
Consolidated 2900-40 Series POSRV Maintenance Manual | 49
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