TM-9-2320-279-20-2

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

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 2 OF 3

TM-9-2320-279-20-2 - Page 142 of 938

TM 9-2320-279-20-2

Brake and Air System Maintenance Instructions (Cont)

11-14.

FRONT DOUBLE CHECK VALVE REMOVAL/INSTALLATION (CONT).

a.

Removal.

NOTE

.

Three double check valves are mounted near front crossmember. One is mounted on

top and two are connected together in front of crossmember.

.

Tag and mark air lines before removal.

(1)

Disconnect four air lines (1).

NOTE

Some vehicles have a nut, lockwasher, and screw. Others have a flanged nut and screw.

(2)

Remove nut (2), lockwasher (3), and screw (4). Remove lower double check valve (5) and middle

double check valve (6).

11-58

Change 2