TM-9-2320-283-20-2

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 2 OF 3

DECEMBER 1983

TM-9-2320-283-20-2 - Page 642 of 852

TM 9-2320-283-20-2

BRAKE SYSTEM.

3-173. TRAILER HAND BRAKE VALVE REPLACEMENT (Continued).

LOCATION/ITEM

ACTION

REMARKS

C

INSTALLATION (Continued)

8

Two bolts (7) and

Install through item (5) into

lockwashers (6)

item (11) and tighten.

9

Inlet valve air

Connect and tighten

Connect according to

line (9) and

identification from

delivery port air

step 1.

line (8).

D

OPERATIONAL CHECK

NOTE

The trailer hand brake valve should deliver full reservoir pressure.

Do the following procedure for testing and

adjusting the hand brake valve.

10 Air system

Close

Refer to TM 9-2320-

draincocks

283-10.

11 Delivery port air

Disconnect from item (11).

line (8).

12 Air pressure gage

Connect to item (11)

Suitable gage, 0-200

psi.

13 Engine

Start up

Operate until Refer to TM 9-2320-

maximum reservoir pressure

283-10.

is reached.

14 Lever (1)

Operate.

15 Air pressure gage

Should indicate between 90

To adjust, do subpara-

and 120 psi

graph E.

16 Engine

Shut down

Refer to TM 9-2320-

283-10.

3-1014