TM-9-2320-334-13&P LHST Operator, Field and Parts Manual M1147A1 Trailer Download
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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.