TM-9-2320-279-34-2

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

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS DIRECT SUPPORT AND GENERAL SUPPORT, VOLUME 2 OF 3

TM-9-2320-279-34-2 - Page 144 of 632

TM 9-2320-279-34-2

Brake System Maintenance Instructions (Cont)

11-13. TRACTOR PROTECTION VALVE REPAIR (CONT).

a. Disassembly.

(1)

Mount body (1) in vise with soft jaws.

(2) Remove retaining ring (2) and washer (3) while holding down

diaphragm seat assembly (4).

(3)

(4)

Allow diaphragm seat assembly (4) to rise slowly until spring (5) is

fully extended.

Remove diaphragm seat assembly (4), spring (5), and plunger (6)

from body (l).

(5) Remove preformed packing (7) from diaphragm seat

assembly (4).

11-42