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 114 of 632

TM 9-2320-279-34-2

Brake System Maintenance Instructions (Cont)

11-5. BRAKE RELAY VALVE REPAIR (CONT).

a. Disassembly.

(1)

Remove retaining ring (1) while holding down exhaust cover

assembly (2).

(2)

Allow exhaust cover assembly (2) to rise slowly until spring (3) is

fully extended.

(3)

Remove exhaust cover assembly (2) and preformed packings (4

and 5) from exhaust cover assembly.

(4)

Remove spring (3), inlet/exhaust valve (6), and valve retainer (7)

from body (8).

(5)

Matchmark cover (9) and body (8).

NOTE

Rear relay valve will not have mounting bracket attached.

(6)

Mount unit in vise with soft jaws. Remove four screws (JO),

lockwashers (11), mounting bracket (12), cover (9), and sealing

ring (13).

(7)

Remove piston (14) and preformed packing (15) from body (8).

b. CIeaning/Inspection.

WARNING

Adhesives, solvents, and sealing compounds can bum easily, can give

off harmful vapors,

and

are harmful to skin and clothing. To avoid

injury or death, keep away from open fire and use in well-ventilated

area. If adhesive, solvent, or sealing compound gets on skin or

clothing, wash immediately with soap and water.

(1)

Clean all metal parts in dry cleaning solvent.

(2)

Inspect all parts for damage, cracks, breaks, or deterioration.

(3)

Replace unserviceable parts.

11-10