Reassembly Of 4900 Series Pilot Valve; Lubricants And Sealants; Assembly Of 49Pv07/37 - Baker Hughes Consolidated 4900 Series Instruction Manual

XVIII.

Reassembly of 4900 Series Pilot Valve

A. Lubricants and Sealants
1. Lubricate all O-Rings, except those made from
silicone, and spring energized seals, sparingly
with silicone grease (P/N SP505).
2. Seal all pipe threads with Teflon tape or pipe
sealant (P/N SP364-AB).
3. Lubricate standard threads and bearing points
with Fluorolube GR362 (P/N 4668601) or
equivalent.
B. Assembly of 49PV07/37
B.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
43.
(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.
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(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 shown in
Figure 24.
Plunger
Spring Seal
(Main Piston)
Figure 22: Funnel Tube
Spring Seal
(Adjuster Top)
Funnel Tube
Figure 23: Plunger Cylinder
Spring Seal (Insert)
Adjuster Top
Adjuster Bottom
Figure 24: Adjuster Top Assembly
Consolidated 4900 MPV Series POSRV Manual
Plunger Cylinder
Funnel Tube
Adjuster Top
Plunger Cylinder
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