BOWL LIFT CHECK VALVES REPAIR - CONTINUED
CLEANING AND INSPECTION
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.
Particles blown by compressed air are hazardous. DO NOT exceed 15 psi (103 kPa) nozzle pressure
when drying parts with compressed air. Use a maximum of 30 psi (207 kPa) when cleaning compo-
nents. DO NOT direct compressed air against human skin. Failure to follow this warning may cause
injury or death. Make sure air stream is directed away from user and other personnel in the area. To pre-
vent injury, user must wear protective goggles or face shield.
Remove gasket material from all mounting surfaces.
Clean all parts with solvent cleaning compound.
Dry all parts with compressed air.
Apply 0.95 lb test force to spring (12).
Under test force, spring (12) length should be compressed to 0.31 in. (7.87 mm).
Release spring (12). Spring free length after test should measure 3 in. (76.2 mm).
Repeat test for spring (3), applying 32 lb test force. Length under test force should be 1.77 in. (44.96 mm) Free length
after test should measure 2.42 in. (61.47 mm).
Repeat test for spring (7), applying 10.29 lb test force. Length under test force should be 2.31 in. (58.67 mm) Free length
after test should measure 2.81 in. (71.37 mm).
Replace any spring that does not conform to test specifications.
Inspect springs (3), (7) and (12). Replace if cracked, broken, permanently set or if test lengths differ.
Inspect all other parts.
Install new seal (8), valve (6), spring (7) and plug (9) in body (5).
Install new seal (2), valve (4), spring (3) and plug (1).
Install new preformed packing (11), valve (13), spring (12) and plug (10).
Install bowl lift check valve (WP 0228 00).
END OF WORK PACKAGE
0324 00-3/-4 Blank