Assembly Of 49Mv07 - Baker Hughes Consolidated 4900 Series Instruction Manual

XVIII. Reassembly of 4900 Series Pilot Valve (Cont.)
B.4 Assembly of the Port Adaptor for the
49PV valves
1. Insert the Modulator Check Spring into the
Modulator Vent Port opening of the Pilot Base.
2. Insert the O-Ring (Inlet Port), O-Ring (Dome
Port), and O-Ring (Vent Port) into the O-Ring
grooves of the Pilot Base.
3. Insert the Ball (Vent Port) into the vent port
letting
it rest on the Spring (Vent Port).
4. Align the bolt holes of the Inlet Adaptor with the
two Cap Screw threaded holes in the Pilot Base.
The two holes on the face of the Inlet Adaptor
must align with the vent port and dome port
openings of the Pilot Base.
B.5 Assembly of the Optional High
Capacity Filter
1. Insert O-Rings into the two .375" (9.53 mm)
diameter x .055" (13.97 mm) deep counterbores
of the external filter port of the Pilot Base.
2. Insert an O-Ring into the counterbore at the filter
base bolt hole.
3. Assemble the Filter Base to the Pilot Base using
the filter base bolt reference on the b/m. Torque
the bolt to 35 ± 5 ft/lbs (47.45 ± 6.78 Nm).
4. Install a filter sleeve O-Ring seal over the filter
sleeve guide shoulder of the Filter Base.
5. Install a filter sleeve/O-Ring seal over the filter
sleeve guide shoulder of the filter end cap.
6. Install a filter sleeve O-Ring seal over tie bolt.
7. Install the filter element and spring over tie bolt
and onto the raised filter element guide of the
filter end cap.
8. Thread the tie bolt with sleeve, filter element,
spring, O-Rings & end cap on tie bolt to filter
base. The 1/8"-27NPT thread in the end cap
must be facing toward the pilot base inlet flange
face, tighten the bolt until metal-to-metal make
up with the guide sleeve is obtained.
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Baker Hughes
C. Assembly of 49MV07
C.1 Making the Main Pilot
1. Making the Adjuster Assembly,
This assembly consists of:
1 – Adjuster Bottom
1 – Adjuster Top
1 – Spring Seal (Adjuster Top)
1 – O-Ring (Adjuster Top)
1 – O-Ring (Adjuster Bottom)
a. Check the Adjuster Top for burrs at the spring
seal lead in chamfer. Remove any burrs using
a polishing cloth.
b. Install Spring Seal (Adjuster Top) into Adjuster
Top using insertion tool as shown in Figure
40.
(i) Lubricate Spring Seal (Adjuster Top) with
silicone grease.
(ii) Install Spring Seal (Adjuster Top) onto
Plunger Cylinder with spring facing away
from
Plunger Cylinder.
(iii) Insert Plunger into Plunger Cylinder until
Plunger lightly contacts Spring Seal
(Adjuster Top).
(iv) Insert Funnel Tube, chamfer side first, over
the Plunger and Spring Seal (Adjuster Top).
Stop when Spring Seal (Adjuster Top) is
about half way inside the Funnel Tube as
shown in Figure 22.
(v) Remove Plunger.
(vi) Insert Funnel Tube Assembly into Adjuster
Top until Funnel Tube contacts Spring Seal
(Adjuster Top) gland.
(vii) Push down on Plunger cylinder to insert
Spring Seal (Adjuster Top) into Adjuster Top
as shown in Figure 23.
(viii) Remove Funnel Tube Assembly.
(ix) Inspect Adjuster Top to make sure that
Spring Seal (Adjuster Top) did not flare out
during installation and that the Spring Seal
(Adjuster Top) is oriented as shown in Figure
24.
c. Thread Adjuster Top clockwise onto Adjuster
bottom and torque to 27±2 ft-lbs (37± 2.7
N-m).
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