TM 9-2320-361-20 TROUBLESHOOTING SYMPTOM INDEX MALFUNCTION TROUBLESHOOTING NO. MALFUNCTION PROCEDURE PAGE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. PARKING BRAKE Parking brake will not hold vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54 Parking brake drags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54 SERVICE BRAKES Brake pedal low, soft, or goes to floorboard (weak or no braking) . . . . . 2-56 Excessive pedal pressure required to stop vehicle (brake pedal stops two inches or more above floorboard); no apparent air system failure . . 2-58 Vehicle pulls to right or left when applying brakes . . . . . . . . . . . . . . . 2-60 Brakes drag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61 Brakes squeal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62 COMPRESSED AIR Excessive pedal pressure required to stop vehicle when towing a trailer M275A2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62 No air pressure or compressed air reads below 60 psi (low air pressure warning buzzer sounding indicating air pressure not building up to normal operating range as indicated by gage) . . . . . . . . . . . . . . . . . . 2-66 Air pressure does not build up to normal operating pressure (above 85 psi) according to gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68 Air pressure exceeds maximum (gage reads over 120 psi) and safety valve opens to release pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68 Low, or no reading on air pressure gage and warning buzzer shuts off . 2-70 Warning buzzer fails to sound on low pressure (below 60 psi). . . . . . . . 2-70 AIR-OPERATED ACCESSORIES Windshield wipers inoperative or operate slowly (gage at normal operating pressure) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71 Front wheel drive does not engage (front wheel drive lock-in switch engaged) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72 Air horn does not work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73 2-53