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 TM 5-2410-237-23
PRESSURE CONTROL VALVE REPAIR - CONTINUED
0245 24
CLEANING AND INSPECTION
WARNING
Solvent cleaning compound MIL-PRF-680 Type III is an environmentally compliant and low toxic
material. However, it may be irritating to the eyes and skin. Use protective gloves and goggles. Use
in well-ventilated areas. Keep away from open flames and other sources of ignition. Failure to fol-
low this warning may cause injury or death.
Particles blown by compressed air are hazardous. DO NOT exceed 15 psi (103 kPa) nozzle pres-
sure when drying parts with compressed air. DO NOT direct compressed air against human skin.
Failure to follow this warning may result in injury. Make sure air stream is directed away from
user and other personnel in the area. To prevent injury, user must wear protective goggles or face
shield.
1.
Clean all parts in solvent cleaning compound. Ensure all passages in valve body are clean.
2.
Thoroughly dry all parts and all passages in valve body with pressurized air.
3.
Inspect parts for cracks, breaks, distortion or other damage IAW WP 0241 00.
4.
Check all valves for irregular scoring. Replace if necessary.
5.
Check for free movement of valves in valve body bores.
Use spring tester to test spring (14). Force required to compress spring to 0.48 in. (12.2 mm) should be 0.517 + 0.041 lb
6.
(2.30 + 0.18 N). Free length of spring after test should be 0.89 in. (22.6 mm).
Use spring tester to test inner spring (8). Force required to compress spring to 1.93 in. (49.0 mm) should be 35.20 + 1.76
7.
lb (156.6 + 7.8 N). Free length of spring after test should be 2.82 in. (71.6 mm).
Use spring tester to test outer spring (7). Force required to compress spring to 1.93 in. (49.0 mm) should be 80.50 + 4.02
8.
lb (358.1 + 17.9 N). Free length of spring after test should be 2.94 in. (74.7 mm).
Use spring tester to test spring (9). Force required to compress spring to 0.940 in. (23.88 mm) should be 7.00 + 0.56 lb
9.
(31.1 + 2.5 N). Free length of spring after test should be 1.25 in. (31.8 mm).
10.
Replace damaged or defective parts.
ASSEMBLY
NOTE
Lightly coat all components of hydraulic pressure control valve with clean oil before assembly.
1.
Install new seal (29) on plug (28) and install plug in valve body (4).
2.
Install new seal (27) on plug (26) and install plug in valve body (4).
3.
Install new O-ring (25) on plug (24) and install plug in valve body (4).
4.
Install new O-ring (23) on plug (22) and install plug in valve body (4).
0245 24-4
Change 1
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