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TM 07661B-14/1
APPENDIX A
A 3-40. DISCHARGE NOZZLES. The discharge nozzle shutoff valves should normally arrive at the field maintenance
facility separated from tie bar. The nozzle barrel(s) and quick disconnect(s) will normally have been removed. If the
complete twin nozzle assembly is forwarded, remove the discharge nozzles per paragraph 3-23.
a.
Disassembly. (figure 3-25)
(1)
Clamp valve body (3) in a vise, handle end down. Unscrew forward seat (1) from valve body. Remove
and discard o-ring (2) from forward seat.
(2)
Remove screw (4), valve seal washer (5), seal (6), and valve stem washer (7).
(3)
Remove spring (8) from stem. Remove stem (18) with valve lever attached. Using a pin type wrench,
unscrew rear seal (11) from valve body. Discard body o-ring (10), rod wiper (9) from rear seal.
(4)
Note position of handles on right and left hand valve assemblies for correct positioning at assembly.
Remove four screws (13) from handle assembly. Remove valve handle (12).
(5)
Drive out spring pin (16). Remove valve lever (14) from stem (18).
b.
Assembly.
(1)
Be sure all parts are free from dirt and chips prior to assembling.
NOTE
Apply a moderate amount of silicone grease, MIL-S-8660B to all o-rings and sliding surfaces
prior to assembly.
(2)
Install rod wiper (9) into bore of rear seal (11). Lubricate o-ring (10) with silicone grease and install on
outer diameter of rear seal (11). Install o-ring over shoulder of rear seal (1), not over threads, using gare not to cut o-
ring.
(3)
Lubricate the inner circumference of the rod wiper (9).
Install the rear
seal (11) into the valve body (3). Tighten rear seal (11) securely, using a pintype wrench.
(4)
Install valve lever (14) onto the valve stem (18). Install spring pin (16). Lubricate o-ring (17) and install in
groove on stem (18).
(5)
Install stem into body through rear seal.
(6)
Clamp lever (14) in a soft jaw vise. Install spring (8) over stem (18).
(7)
Put valve seal washer (5) on pan head machine screw (4), with smaller diameter of seal washer next to
head of screw.
(8)
Lubricate seal (6) with silicone grease and install seal over shoulder of valve seal washer.
(9)
Slide stem washer (7) onto screw, with larger diameter toward seal already installed on screw.
(10)
Make sure threads of screw (4) and threads inside stem (18) are clean and dry. Apply Loctite primer "T" to
threads and allow to dry.
A 3-54
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