TM 9-2330-390-14&PTable 4-2. Unit Troubleshooting (Con't).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONBRAKE SYSTEM6.NO BRAKES OR WEAK BRAKES.l DO NOT disconnect air lines and fittings while dolly set airbrake system ispressurized. Intervehicular air lines must be disconnected and air reservoirs drainedbefore air lines and fittings are disconnected. A line or fitting disconnected underpressure may explode with great force and cause serious injury to personnel.l Wear eye protection when working with compressed air to avoid serious eye injury.Step 1.Step 2.Step 3.Step 4.Step 5.Step 6.NOTERefer to airbrake system schematics for assistance (see paragraph 4-74).Perform airbrake system leakage check (see paragraph 4-23).Replace any leaking air line or damaged valve.Check for properly adjusted brakes (see paragraph 4-59).Perform minor brake adjustment (see paragraph 4-59).Check for damage to airbrake chambers.Replace leaking or damaged airbrake chambers (see paragraph 4-61).Check for loose airbrake chambers in spider plunger housings (see paragraph 4-61).Properly install airbrake chambers (see paragraph 4-61).Remove hub and brakedrum (see paragraph 4-75). Inspect brakedrum and brakeshoes fordamage, wear, or grease-soaked linings.Replace worn brakedrum (see paragraph 4-75).If grease is found on brakeshoe linings, inspect wheel seal. Replace damaged wheel seal(see paragraph 4-75).Replace damaged, worn, or grease-soaked brakeshoes (see paragraph 4-57).Replace spider assembly (see paragraph 4-60).4-33
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