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10
12. Using the squared end of the stem (30), screw the seat
& disc retainer into the first stage body (32). Leave the stem
in the seat & disc retainer. Place the handwheel (21) over the
stem and tighten the seat & disc retainer until finger tight.
Remove the handwheel from the stem.
NOTE: DO NOT apply any type of lubricant to the seat
& disc retainer prior to installation.
13. Install o-ring (25) onto the bonnet (24) so that the o-ring
fits into the groove located above the larger threads. Lubricate
the bonnet threads, then pass the bonnet over the stem (30)
and thread it into the first stage body (32).
14. Attach a 3/4" socket to
a inch pound torque wrench
and torque the bonnet (24) to
a value of 90 in-lbs (10.2 Nm).
15. Place the nylon washer
(22) over the stem (30), so it
sits on top of the bonnet (24).
Face the round edge on the
indicator ring (23) outward and
thread the indicator ring onto
the bonnet until it bottoms out.
16. When the indicator ring
(23) bottoms out, turn it
slightly counter-clockwise
so the corners of the square
shaft of the stem (30) point
towards the centers of the
square cut outs of the indica-
tor ring. Turn an additional
90° counter-clockwise.
17. Place the handwheel (21) over the indicator ring (23). Place
the spring (20) into the handwheel, followed by the washer (19).
Using the modified screwdriver, screw the handwheel retainer
(18) onto the end of the stem (30) until it will not turn any further.
CAUTION:
If resistance is felt while screwing the
handwheel retainer (18) onto the stem (30), stop
and start over to avoid cross threading.
18. Using the valve core tool, screw the schrader valve (9) into
the QD fitting on the MP hose (13) until hand-tight. Install o-ring
(10) into groove inside the QD fitting. The end of the seat extractor
tool can be used to push the o-ring into place. Install the hose hat
(8) (if equipped) over the QD fitting on the MP hose.
19. Install o-ring (16) onto the relief valve (17c). Place the relief
valve (o-ring end first into the relief valve screw end of the
swivel relief plug (17d).
20. Place the spring (17b),
onto the relief valve (17c).
LPIS / DSIS Technical Manual
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