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9. Examine spiral rings (40) and guide ring (36). Remove seal case
(37) from valve casing and check O-rings (38). Replace worn
parts; apply silicon grease on seals and o-rings before installing.
11. Clean plunger surface (25); using the tension screw, put the
new plunger pipe and a new copper gasket (29D) onto the
centering sleeve. Cover the threads of the tension screw lightly
with lock tight and tighten to 26 ft-lbs.
IMPORTANT: Care must be taken that no lock tight gets
between the plunger pipe (29B) and the centring sleeve (29A).
The plunger pipe should not be strained by over tightening of the
tension screw or through damage to front surface of plunger,
otherwise it will probably break.
13. Tighten hexagon nuts (49)
in a crossing pattern shown
to the right to 59 ft-lbs.
BP5236 - Repair Instructions
6
8
8
10.
Remove tension screw
(29C) and remove the
plunger pipe from centering
sleeve (29A)
12. Check o-rings (38) on seal
cases (37). Clean mounting
surfaces of the seal cases
as well as sealing surfaces
in valve casing. Put seal
cases (37) in the centring
holes of the valve casing,
then push valve casing care-
fully onto stud bolts (49).
7
4
2
1
3
5
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