C. 39MV22/72 Disassembly
Figures 54, 55 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 54 or 55 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), O-Ring (Top
Plate) and back-up rings (if applicable).
15. Remove Main Piston Assembly from Pilot Base.
Main Piston Assembly consists of:
1 – Main Piston
1 – Piston Nose
1 – Piston Retainer Nut
1 – Set Screw
16.
Remove Set Screw. Turn Piston Retainer Nut
counterclockwise to remove. Remove Piston
Nose.
Note: For Dirty Service Option, please refer to
“Dirty Service Option” (Section XXII.B) for
disassembly instructions.
17. Remove Spring Seal (Main Piston) and Backup
Ring (if applicable) and discard.
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 – Vent Seal Adaptor
1 – O-Ring (Adjuster Top)
1 – O-Ring (Adjuster Bottom)
1 – Spring Seal (Adjuster Top)
1 – Spring Seal (Adjuster Bottom)
1.
Turn Adjuster Assembly clockwise counting the
number of flats until assembly stops. Record
number of flats for reassembly.
XVII. Disassembly of Pilot Valve (Cont.)
Consolidated 2900 Series Generation II POSRV Instruction Manual
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