EXCESSIVE BRAKING DISTANCE.

TM 9-2330-385-14

4-16. BRAKE SYSTEM TROUBLESHOOTING PROCEDURES (CONT).

9. EXCESSIVE BRAKING DISTANCE.

INITIAL SETUP

Tools and Special Tools

References

Tool Kit, General Mechanic's: Automotive

TM 9-2320-364-10

(Item 50, Appendix J)

Equipment Condition

Pressure Test Kit (Item 34, Appendix J)

Engine OFF, (TM 9-2320-364-10)

Parking brake applied, (TM 9-2320-364-10)

Materials/Parts

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)

Personnel Required

Two

Trailer air system charged, (Para 2-22)

NOTE

Soap and water solution will be used to visually check for leaks.

START

KNOWN INFO

TEST OPTIONS

Are air lines 2255, 2660, 2637,

Visual inspection.

Truck air system OK.

2638, 2639, 2260, service

REASON FOR QUESTION

brake air lines, fittings, relay

POSSIBLE PROBLEMS

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

components

(Para 4-39 and 4-47).

Verify repair, go to

Step 5 of this Fault.

YES

4-300