| PROBLEM | POSSIBLE CAUSE | POSSIBLE REMEDY |
| Brakes will NOT release | Disc brake caliper bound up | Lubricate or replace brake caliper |
| Brake hoses restricted | Replace hoses | |
| Brake control valve restricted/inoperable | Repair/replace control valve | |
| Brake out of adjustment | Adjust brake/repair or replace automatic adjustment device as necessary | |
| Damaged brake chamber | Replace brake chamber | |
| Damaged brake assembly | Replace or repair brake assembly | |
| Supply air interrupted | Open glad hand cut-out cock or push brake control valve in | |
| Supply line improperly coupled | Properly couple supply air line | |
| Brake pads frozen to rotor in cold weather | Warm brakes | |
| No brakes or insufficient brake performance | Service air interrupted | Open glad hand cut-out cock |
| Service air line improperly coupled | Properly couple service air line | |
| Brake hoses restricted | Relieve restriction or obstruction or replace hoses | |
| Brake control valve restricted/inoperable | Repair/replace control valve | |
| Brake out of adjustment | Adjust brake/repair or replace automatic adjustment device as necessary | |
| Damaged brake chamber | Replace brake chamber | |
| Damaged brake assembly | Replace or repair brake assembly | |
| Dragging Brakes/Slow brake application or release timing | Brake hoses restricted | Relieve restriction or obstruction or replace hoses |
| Brake control valve restricted/inoperable | Repair/replace control valve | |
| Brake out of adjustment | Adjust brake/repair or replace automatic adjustment device as necessary | |
| Damaged brake chamber | Replace brake chamber | |
| Damaged brake assembly | Replace or repair brake assembly | |
| Dog tracking | Axle not properly aligned | Align axle |
| Slider assembly racked or NOT aligned properly | Repair or replace slider assembly | |
| Frame bent or NOT aligned properly | Repair or align frame | |
| Damaged suspension component | Repair or replace suspension component | |
| Bent axle | Replace axle | |
| Uneven tire wear | Improper tire inflation | Inflate tire to proper pressure |
| Loose wheel stud nuts | Inspect for and repair any resultant wheel end damage and tighten properly | |
| Improper wheel bearing adjustment | Inspect for and repair any resultant wheel end damage and adjust properly | |
| Axle NOT properly aligned | Align axle | |
| Slider assembly racked or NOT aligned properly | Repair or replace slider assembly | |
| Frame bent or NOT aligned properly | Repair or align frame | |
| Damaged suspension component | Repair or replace suspension component | |
| Bent axle | Replace axle | |
| Mismatched tire sizes | Properly match tire sizes | |
| Unequal brake balance or timing | Repair brakes as necessary | |
| Overly aggressive braking | Instruct/train driver in proper brake use | |
| High speed turns | Instruct/train driver in proper vehicle speeds | |
| High level of side scrub | Instruct/train driver in proper vehicle maneuvering | |
| Anti-Lock Brake System malfunction | Refer to ABS manufacturer’s service literature | |
| Grabbing brakes | Contaminants on brake lining | Replace brake pads |
| Brake out of adjustment | Adjust brake/repair or replace automatic adjustment device as necessary | |
| Warped brake rotor | Machine or replace brake rotor | |
| Damaged brake chamber | Replace brake chamber | |
| Damaged brake assembly | Replace or repair brake assembly | |
| Unequal brake balance or timing | Repair brakes as necessary | |
| Anti-lock Brake System malfunction | Refer to ABS manufacturer's service literature | |
| Excessive heat cracks in rotor | Brake out of adjustment | Adjust brake/repair or replace automatic adjustment device as necessary |
| Overly aggressive braking | Instruct/train driver in proper brake use | |
| Unequal brake balance or timing | Repair brakes as necessary | |
| Anti-Lock Brake System malfunction | Refer to ABS manufacturer's service literature | |
| Damaged brake chamber | Replace brake chamber | |
| Damaged brake assembly | Replace or repair brake assembly |