49Mv07 - Baker Hughes Consolidated 4900 Series Instruction Manual

XVI. Disassembly of 4900 Series Pilot Valve (Cont.)
19. Remove Backflow Preventer by turning Backflow
Preventer Body counterclockwise.
20. a. R emove Backflow Preventer Guide.
b. Remove Ball and all O-Rings and discard.
21. Removal of Field Test Connection
The Field Test Connection consists of:
1 – Field Test Body
1 – Ball
1 – Tube Filter
1 – O-Ring (Field Test Body) Small
1 – O-Ring (Field Test Body) Large
2 – O-Ring (Ball Seat)
Pipe Plug (Field Test Connection)
22. Remove Field Test Connection by turning Field
Test Body counterclockwise.
23. Remove Ball, Tube Filter, and all O-Rings and
discard.
24. Removal of the Optional High Capacity Filter
The External Filter consists of:
1 – Canister Filter Sleeve
1 – Canister Filter Base
1 – Filter End Cap
1 – Canister Filter Tie Bolt
1 – Filter Element
1 – Cap Screw (Canister Filter)
1 – Pipe Plug (Canister Filter)
1 – O-Ring (Filter Sleeve)
1 – O-Ring (Filter Base)
1 – O-Ring (Filter Tie Bolt)
1 – O-Ring (Filter Base Bolt)
1 – O-Ring (Filter End Cap)
25. Remove Canister Filter Tie Bolt by turning
counterclockwise.
26. Keep turning until Canister Filter Sleeve has
been removed from Canister Filter Tie Bolt.
27. Remove Cap Screw (Canister Filter) by turning
counterclockwise.
28. Remove Canister Filter Base.
29. Remove Filter Element and all O-Rings and
discard.
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B. 49MV07
(Figures 18 and 19)
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 18
to remove the Lifting Lever assembly. Then
return to Figure 19 to continue disassembly.
a. The Lifting Lever Assembly consists of:
1 – Lever
1 – Drive Pin
1 – Cam Shaft
1 – Bushing
b. Remove Lifting Lever Assembly by turning
Cam Bushing counterclockwise.
c. Turn Cap (Compression Screw)
counterclockwise.
d. Measure distance from Release Lock Nut
to the top of the Lifting Stem for reassembly
later.
e. Remove the Release Lock Nut and Release
Nut by turning counterclockwise.
4. Measure and record Compression Screw height
for later use when resetting.
5. Turn Compression Screw Lock Nut
counterclockwise to loosen.
6. Turn Compression Screw counterclockwise to
remove the load on the Spring.
7. Turn Set Screw counterclockwise to loosen.
8. Bonnet can now be removed by turning
counterclockwise.
9. 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.
10. 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).
11. Remove Main Piston from Pilot Base.
Consolidated 4900 MPV Series POSRV Manual
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