XVII. Disassembly of Pilot Valve
A. 39PV07/37 Disassembly
Figures 51 and 52
1. Remove and discard the aluminum seals and
sealing wire.
2.
Remove Cap (Compression Screw) by turning
counterclockwise.
3. If a lifting lever is installed, also use Figure 52 to
remove the Lifting Lever assembly. Then return
to Figure 51 to continue disassembly.
The Lifting Lever Assembly consists of:
1 – Lever
1 – Drive Pin
1 – Cam Shaft
1 – Bushing
4. Remove Lifting Lever Assembly by turning
Bushing counterclockwise.
5.
Turn Cap (Compression Screw)
counterclockwise.
6. Measure distance from Release Lock Nut to the
top of the Lifting Stem for reassembly later.
7. Remove the Release Lock Nut and Release Nut
by turning counterclockwise.
8.
Measure and record Compression Screw height
for later use when resetting.
9.
Turn Compression Screw Lock Nut
counterclockwise to loosen.
10.
Turn Compression Screw counterclockwise to
remove the load on the Spring.
11.
Turn Set Screw counterclockwise to loosen.
12.
Bonnet can now be removed by turning
counterclockwise.
13.
Spring and Spring Washers can now be
removed.
Note: If Lifting Lever option is equipped, there is
no need to remove Drive Pin from Bottom
Spring Washer assembly.
14.
Remove the four Cap Screws (Top Plate)
holding the Top Plate to the Pilot Base. Remove
and discard the Spring Seal (Main Piston) and
O-Ring (Top Plate).
15. Remove Main Piston from Pilot Base.
Note: For Dirty Service Option, please refer to
“Dirty Service Option” (Section XXII.B) for
disassembly instructions.
Removing the Insert Assembly.
The Insert Assembly consists of:
1 - Insert Top
1 - Insert Bottom
1 - Spring Seal (Insert)
1 - O-Ring (Insert)
1. Remove Insert Assembly from the top of the
Pilot Base with tool #4995401 as shown in
Figure 93. Remove and discard the O-Ring
(Insert) on the bottom of the Insert Assembly.
Disassemble Insert Assembly by removing
the Insert Bottom from the Insert Top. Discard
Spring Seal (Insert).
2. Remove Adjuster Cap from the bottom of the
Pilot Base by turning counterclockwise.
3. Loosen Adjuster Lock Nut by turning
counterclockwise.
Removing the Adjuster Assembly:
The Adjuster Assembly consists of:
1 – Adjuster Top
1 – Adjuster Bottom
1 – O-Ring (Adjuster Top)
1 – O-Ring (Adjuster Bottom)
1 – Spring Seal (Adjuster Top)
1.
Turn Adjuster Assembly clockwise counting the
number of flats until assembly stops. Record
number of flats for reassembly.
2. Remove Adjuster Assembly from the Pilot
Base by turning counterclockwise. Remove
O-Ring (Adjuster Top) and O-Ring (Adjuster
Bottom) from adjuster assembly and
discard. Disassemble Adjuster Top from
the Adjuster Bottom by turning Adjuster Top
counterclockwise. Remove Spring Seal
(Adjuster Top) from Adjuster Top and discard.
3.
Refer to Field Test Connection / Backflow
Preventer Option (Section XXII.A) for
disassembly of Field Test Connection
Consolidated 2900 Series Generation II POSRV Instruction Manual
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