TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980

TM-9-2320-273-34 - Page 711 of 801

TM 9-2320-273-34

(3)

Remove the four machine screws (11 ) and end cap (10).

(4)

Remove the machine screw (12) from the end of the spool (17). This allows items (6),

(15), (7), (14), (8), (13) and (9) to be removed.

(5)

Remove the handle (20) by disassembling the pin kit (18).

(6)

Remove the two machine screws (12) from the valve body (16). Remove handle bracket

(19), retainer (15) and spool seal (6). This allows the spool to be removed.

(7)

Remove the spool (17).

(8)

Remove the relief valve (21 ) and seal kit (22).

(9)

Inspect the relief valve for damage and contamination.

(10)

Remove plug (5), O-ring (4), spring (3), check valve (2), and seal (1).

(11)

Inspect all parts for wear and other damage. If the spool (17) or body (16) are worn or

pitted, the valve must be replaced.

c. Assembly.

NOTE

Replace all seals.

(1)

Install the relief valve (21 ) and with seal kit (22).

(2)

Install seal (1), check valve (2), spring (3), O-ring (4), and plug (5).

(3)

Install the spool (17).

(4)

Assemble and install items (9), (13), (8), (14), (7), (15), and (6). Install the machine

screw (12) in the end of the spool (17). Torque to 8 Ib-ft (1 1 NŽm).

(5)

Install the handle bracket (19) and machine screws (12) into body (16). Torque to

8 Ib-ft (11 N•m).

(6)

Install the handle (20) and secure with the pin kit (18).

(7)

Install the end cap (10) and four machine screws (11). Tighten the machine screws

(11) to 8 Ib-ft (11 N•m) torque.

d. Installation (Refer

to TM 9-2320-273-20).

20-8. Repair of Fail-Safe Brake.

a. Disassembly.

(1)

position unit with shaft (8, fig. 20-21 ) pointing down.

20-28