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 602 of 801

TM9-2320-273-34

b. Installation.

(Refer to TM 9-2320-273-20).

14-22. Adjustment.

The trailer hand brake valve should deliver full reservoir pressure. The following

procedure may be used for testing and adjustment of the trailer hand brake valve.

a.

Remove the air line from the delivery port of the trailer hand brake valve.

b. Install a suitable pressure gage that will read up to 200 psi (1379 Kpa).

c. Start up and operate engine until maximum air reservoir pressure is obtained. (Refer to TM 9-

2320-273-10).

d. Operate trailer hand brake valve.

e. Test gage should read between 90-120 psi (620.6-827.4 Kpa).

f. If the delivered pressure is below final delivery pressure, it can be adjusted by removing the head

(21, fig. 14-51) and adjusting ring lockwasher (22) and rotating the adjusting ring (23) clockwise, with

a small screwdriver inserted in one of the inner notches of the adjusting ring to raise the delivery pressure.

Likewise, the delivery pressure can be lowered by rotating the adjusting ring counterclockwise.

g. After adjustments have been made, install the adjusting ring Iockwasher (22) and head (21).

h. Return trailer hand brake valve to exhaust air pressure on test gage.

i.

Remove test gage and install air delivery line.

j. Shut down engine. (Refer to TM 9-2320-273-10).

14-53/14-54 (Blank)