TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 844 of 1015

TM 9-2320-272-24-1

3-172. PARKING BRAKE ADJUSTMENT (Contd)

1.

Loosen adjusting nut (4) on parking brake cable (1) until parking brake lever (3) has free travel.

2.

Push parking brake lever (3) clockwise with one hand while turning drum (2) clockwise with other

hand. If drum (2) turns freely when parking brake lever (3) is pushed clockwise, replace parking

brakeshoes (para. 3-176). If drum (2) stops, go to step 3.

NOTE

Assistant will help with step 3.

3.

Pull parking brake lever inside vehicle cab up to engage (TM 9-2320-272-10).

4.

Tighten adjusting nut (4) on parking brake cable (1) against parking brake lever (3) until drum (2)

does not move, then back off counterclockwise 1/2 turn.

5.

Repeat step 1 until slight drag of brakeshoes against drum (2) is observed.

1.

Position lever arm (7) horizontal to valve body (12).

2.

Remove two locknuts (8), washers (9), mounting screws (5), and valve body (12) from bracket (6).

Discard locknuts (8).

3.

Loosen setscrew (10), adjust valve lever (11), and tighten setscrew (10).

4.

Install valve body (12) on bracket (6) with two mounting screws (5), washers (9), and new

lockwashers (8).

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