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Page Title:
Figure 9-8. Separating Front and Rear Shells. |
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 TM 10-3930-633-34
assembly from vise and complete disassembly on
bench, front end down. Unscrew rear plate
Press down firmly on top clamp bar
while removing hook bolts from base to
completely and carefully lift it off front plate hub,
p r e v e n t internal spring force from
grasping valve plunger and spring with other
hand and removing them from bore of front plate
causing shells to fly apart, Remove hook
bolts, top clamp bar, flat bar wrench,
hub. Remove square ring seal from shoulder of
front shell and return spring. Lift power
rear plate.
diaphragm and plate assembly from rear
NOTE
Seal may stick to shoulder of front plate.
shell and remove rear shell from fixture
(8) Using a small rod or screwdriver through
base.
center bore of front plate, push out reaction disc.
(6) Wet rear diaphragm spring retainer with
Loosen front diaphragm from center plate and
alcohol and remove, using fingers only. Remove
slide center plate carefully off front plate hub.
rear diaphragm from rear plate. Set 1-1 /16" hex
CAUTION
bar stock 2" long in a vise, Set diaphragm and
DO NOT damage or remove seal
plate assembly on hex stock with hex opening in
assembly from hub of center plate.
front plate seated on bar. Twist rear plate
(9) Remove front diaphragm from front
counterclockwise, using hard pressure only on
plate.
atmospheric pressure channel or outer edge of
(10) Place shell on work bench, studs up,
plate.
and drive seal out of shell.
(7) After plates have been loosened, remove
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