TM-9-2330-334-13-P

FAMILY OF MEDIUM TACTICAL VEHICLES (FMTV) LOAD HANDLING SYSTEM TRAILER (LHST) M1147A1

TECHNICAL MANUAL; OPERATOR AND FIELD LEVEL MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST (RPSTL)

DECEMBER 2013

CHANGE 1

TM-9-2330-334-13-P - Page 260 of 1184

TM 9-2330-334-13&P

TRAILER BRAKES UNEVENLY OR BRAKES

PULL TO ONE SIDE OR GRAB -Continued

0044 00

BRAKES TROUBLESHOOTING - Continued

Table 1.

Trailer Brakes Unevenly Or Brakes Pull To One Side Or Grab - Continued.

Change 1

0044 00-8

INDICATION/CONDITION

DECISION (NO/YES)

PROCEDURAL STEPS

7.

Is air present at relay valve

delivery port(s) (front) or

ABS ECU valve port(s) (rear)

to affected wheel(s)/brakes?

No

Replace ABS relay valve

(front) (WP 0075 00) or

ABS ECU valve (rear) (WP

0071 00).

1.

Tighten air hoses at

emergency ports of brake air

chambers.

Yes

Go to (Indication/Condition

8).

2.

Loosen air delivery hoses to

spring brakes at delivery

ports of ABS relay valve

(front) or ABS ECU valve

(rear).

3.

Start towing vehicle engine.

4.

Allow brake air pressure to

fully charge.

5.

Depress brake pedal and

have assistant check for

presence of air escaping at

delivery port of ABS relay

valve (front) or ABS ECU

valve (rear) and air hoses.

6.

Shut down towing vehicle

engine.