4-16. BRAKE SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
9. EXCESSIVE BRAKING DISTANCE.
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(Item 50, Appendix J)
Pressure Test Kit (Item 34, Appendix J)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Solution, Soap (Item 21, Appendix E)
Emergency and service air supply gladhand
connected to truck, (Para 2-22)
Trailer air system charged, (Para 2-22)
Soap and water solution will be used to visually check for leaks.
Are air lines 2255, 2660, 2637,
Truck air system OK.
2638, 2639, 2260, service
REASON FOR QUESTION
brake air lines, fittings, relay
valves and brake chambers
If air hose or listed components
Air lines and fittings faulty.
free of crimps and leaks?
are damaged and leaking,
Load sensing valve faulty.
service brakes will not apply
Quick release valve faulty.
because of loss of air pressure.
Brake relay valves faulty.
Crimped air lines will restrict air
Brake drums or shoes faulty.
flow to brake chamber and
brakes will apply slowly.
Repair or replace air
lines and/or replace
(Para 4-39 and 4-47).
Verify repair, go to
Step 5 of this Fault.