TM-9-2320-273-20

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

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE

NOVEMBER 1980

TM-9-2320-273-20 - Page 1020 of 1500

TM 9-2320-273-20

BRAKE SYSTEM.

9-26. TRACTOR PROTECTION VALVE MAINTENANCE (Continued).

LOCATION/lTEM

ACTION

REMARKS

A.

REMOVAL.

1. Airlines (1), (2), (3), and

2. Two nuts, Iockwashers, and

bolts (5).

3. Spacer clip (6).

4. Valve (7), M916, M917, M920

or valve (6), M915.

5. Valve (7), M916, M917, M920

or valve (6), M915.

B.

INSTALLATION.

6.

7.

8.

9.

Valve (7), M916, M917, M920

or valve (6), M915.

Spacer clip (6).

Two nuts, Iockwashers, and

bolts (5).

Air lines (1), (2), (3), and

(4).

C. OPERATIONAL CHECK.

10. Engine.

11. Valve (7), M916, M917, M920

or valve (6), M915.

Remove.

Remove.

Remove.

Remove.

Transfer all components (el-

bows, fittings, adapters, etc. )

to new valve. Coat threaded

joints with liquid teflon,

Install in vehicle.

Install

Install and tighten.

Install and tighten.

Start up (see TM 9-2320-

273-10). Allow system to

reach operating pressure of

105-120 psi (724-827 kPa).

Apply trailer supply valve

and brake pedal valve. Use

soap solution to check for

leaks.

Tag lines for ease of

location at installation.

(M916, M917, and M920

only, )

If installing new valve,

(M916, M917, and M920

only. )

Replace any damaged

lines and/or fittings.

Second mechanic

9-100

(4)