TM 5-4220-231-14&PNOTEPerform in a clean environmentNOTEClean metal parts with nonionic detergent solution (NID) (Item 17,Appendix D). Wipe with clean rags (Item 15, Appendix D) to gotdesired level of cleanliness.NOTELubricate threads and sliding contact surfaces before reassemblywith hydrocarbon grease (Item 13, Appendix D).a. Disassembly Instructions(1) Remove body plug (30) from body (16), allowing body plug unit assembly to be removed from body.(2)Remove valve seat bushing (26), valve (27), and valve spring (28) from body plug (30).(3)Remove, cut, and discard O-ring (29) from body plug (30).(4)Remove valve seat unit (22) from body (16). Remove valve seat (23), valve sea retainer (24), andseat seal (25), which are all parts of valve seat unit (22).(5)Remove valve seat gasket (21) from body (16).(6)Remove the eight cap screws (2) with washers (3) from dome (4).(7)Lift dome (4) from dome plate (7), and remove, cut, and discard 0-ring (5).(8)Remove and retain dome plate (7). Remove needle valve (6) and grommet (8) from dome plate(7).(9)Remove, cut, and discard diaphragm (9).(10) Remove and retain diaphragm plate (10).(11) Remove push rod (11) from body plate (12).(12) Remove body plate (12), using spanner tool M-133940-100.(13) Remove, cut, and discard both seal pin (14) from body plate (12). Retain body plate (12).(14) Remove both port fittings (20) from body (16).(15) Remove, cut, and discard O-ring (19) from each port fitting (20).(16) Remove external control plug (18) from body (16).(17) Remove, cut, and discard O-ring (17) from external control plug (18).6-48
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