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TM 5-4320-306-24
2-21. REPLACE/REPAIR DISCHARGE CHECK VALVE ASSEMBLY (Continued)
CLEANING/INSPECTION/REPAIR:
1
Inspect valve body (22), handle lever (8), valve arm (16), and valve seal disc (21) for cracks, rust, corrosion, and
for damaged or stripped threads Inspect mounting surfaces Make sure they are smooth and flat with no nicks or
burrs.
2
Repair minor nicks or burrs and/or smooth out mounting surfaces with crocus abrasive cloth.
3
Clean interior or mounting surface Clean and refinish outside surface Remove only a minimal amount of surface
material, replace if necessary.
4
Check shaft (9) for wear and damage Replace if severely damaged.
5
Replace extension spring (5) if damaged or if fatigue is evident.
ASSEMBLY:
1
Install valve seal disc (21 ) and valve arm (16) Secure with nut (19) and shoulder bolt (20).
2
Install cotter pin (18) in nut (19).
3
Insert setscrews (15) loosely in valve arm (16).
4
Position key (17) in slot within shaft (9) and slide shaft into valve body (22) through valve arm (16).
5
Position valve arm (16) on shaft (9) and tighten setscrews (15).
6
Install pipe plug (14) on shaft (9).
7
Install retaining rings (11), new friction ring (12), and new shaft seal (13) on shaft (9).
8
Insert woodruff key (10) in shaft (9) and slide handle lever (8) onto shaft.
9
Insert and tighten setscrew (7).
10
Secure one end of extension spring (5) to lower end of handle lever (8) by screwing extension handle (6) into
handle lever (8).
11
Apply sealing compound to cap screw (1 ) threads.
12
Install cap screw (1), lockwasher (2), washer (3), other end of extension spring (5), and spacer sleeve (4) on
discharge check valve (22).
2-83
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