TM 9-2320-260-34-2
(M819) (Contd)
16-37. RELIEF VALVE MAINTENANCE
I
c. Cleaning and Inspection
1.
For general cleaning instructions, refer to para. 2-8.
For general inspection instructions, refer to para. 2-9.
2.
3.
Inspect spring (14) for breaks, bends, or collapsed coils. Replace spring (14) if damaged.
4.
Inspect adjusting screw (3) for bends and stripped or damaged threads. Replace adjusting screw (3)
if damaged.
5.
Inspect plunger (13) for bends, burrs, chipped edges, and scoring. Repair or replace plunger (13)
if damaged.
Inspect sleeve (12) for burrs, scoring, chipped sealing edge, and blocked ports. Repair or replace
6.
sleeve (12) if damaged.
7.
Inspect retainer (6) for damaged threads or burred flats. Repair or replace retainer (6) if damaged.
Inspect valve body (8) for cracks, chipped sealing edges, and damaged threads. Repair or replace
8.
valve body (8) if damaged.
9.
Repair minor burrs, scoring, and thread damage on all parts except adjusting screw (3) and
spring (14) (para. 2-10). Replace unrepairable parts. -
NOTE
Coat all parts with lubricating oil before installation.
1.
Using arbor press, press sleeve (12) into bore of valve body (8). Seat sleeve (12) flush with drain
chamber edge. Remove any burrs on sealing edge of sleeve (12).
Install setscrew (9), new gasket (10), and-screw (11) in side of valve body (8). Ensure setscrew (9)
2.
seats in groove of sleeve (12).
3.
Aline large end of plunger (13) in bore of sleeve ( 12) and drop plunger (13) in sleeve (12).
4.
Position spring (14) and spring guide (15) on plunger (13).
Position new O-ring (7) in groove on retainer (6) and install retainer (6) on valve body (8) over
5.
spring (14) and spring guide (15).
Install adjusting screw (3) on retainer (6) until adjusting screw (3) makes contact with spring
6.
guide (15).
Position new O-ring (5) over adjusting screw (3) and install jamnut (4) on adjusting screw (3).
7.
Turn jamnut (4) until in contact with O-ring (5).
8.
Back adjusting screw (3) out of retainer (6) three turns.
9.
Shake valve body (8) and ensure plunger (13) moves off seat of sleeve (12).
10.
Loosening jamnut (4) as necessary, screw in adjusting screw (3) to recorded position.
Tighten jamnut (4) onto O-ring (5).
11.
Install new packing (2) and capnut (1) on adjusting screw (3).
12.
1. Wrap male threads on adapter (22), adapter elbow (19), tee fitting (26), and hoses (17) and (27)
with antiseize tape.
2. Place relief valve (8) in vise and install bushings (23), (24), and (25) on relief valve (8).
3. Install adapter (22) and adapter elbow (19) on bushing (23) and tee fitting (26).
4. Install relief valve (8) on pipe nipple (16).
5. Install tee fitting (26) on bushing (25).
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