TM 5-4310-386-14
5-28. Pressure Maintaining Valve.
b.
Repair. (figure 5-42)
(1)
Remove pressure maintaining valve (para. a.).
(2)
Remove four screws (1).
(3)
Separate two blocks (2) and (3) and remove piston (4), two preformed packings (5), cup (6) and spring (7).
(4)
Remove disc (8) from block (3).
(5)
Clean all components, except preformed packings, in accordance with cleaning procedures in Chapter 4,
Section VII of this manual.
(6)
Inspect spring (7) and cup (6) and replace pressure maintaining valve if either itemis defective.
(7)
Inspect piston (4) and replace if corroded.
(8)
Inspect blocks (2) and (3) and replace if cracked or corroded.
(9)
Inspect disc (8) and replace pressure maintaining valve if disc (8) is cracked or otherwise damaged.
(10)
Install two preformed packings (5) in piston (4).
(11)
Install spring (7) and cup (6) in block (2). Ensure spring (7) is properly seated in block (2).
(12)
Install piston (4) in block (2).
(13)
Install block (3) and secure with four screws (1).
(14)
Install disc (8) in block (3).
(15)
Install pressure maintaining valve (para. a.).
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