TM-9-2320-279-34-3

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS DIRECT SUPPORT AND GENERAL SUPPORT, VOLUME 3 OF 3

TM-9-2320-279-34-3 - Page 517 of 717

TM 9-2320-279-34-3

M978 Tanker Maintenance Procedure Instructions (Cont)

22-13. V4 BYPASS/PRESSURE RELIEF VALVE REPAIR (CONT).

(11)

(12)

(13)

Remove cap (34) from cover (35).

Record number of threads showing on adjusting screw (36) and remove adjusting screw and

nut (37).

Remove eight screws (38), cover (35), guide (39), spring (40), guide (41), and control body (42)

from valve body (43).

(14)

(15)

(16)

(17)

(18)

22-60

Remove preformed packing (44) from control body (42).

Remove nut (45), washer (46), washer (47), diaphragm (48), and washer (49).

Remove stem (50), nut (51), and retainer (52).

Remove two preformed packings (53) from stem (50) and preformed packing (54) from control

body (42).

Remove seat (55) and preformed packing (56) from valve body (43).