PARKING BRAKE(S) ON ONE AXLE DO NOT RELEASE OR DO NOT RELEASE CORRECTLY.

TM 9-2330-385-14

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

2. PARKING BRAKE(S) ON ONE AXLE DO NOT RELEASE OR DO NOT RELEASE

CORRECTLY.

INITIAL SETUP

Tools and Special Tools

References

Tool Kit, General Mechanic's: Automotive

TM 9-2320-364-10

(Item 50, Appendix J)

Equipment Condition

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

Materials/Parts

Solution, Soap (Item 21, Appendix E)

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

Pin, Cotter (Item 62, Appendix I)

Wheels chocked, (TM 9-2320-364-10)

Pin, Cotter (Item 63, Appendix I)

Emergency air supply gladhand connected

to truck, (Para 2-22)

Personnel Required

Trailer air system charged, (Para 2-22)

Two

NOTE

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

START

KNOWN INFO

TEST OPTIONS

Visual inspection.

Are air lines, fittings, and/or

Truck air system OK.

Audible inspection.

brake chambers free of leaks?

POSSIBLE PROBLEMS

REASON FOR QUESTION

Air lines and fittings faulty.

If air lines or listed components

Brake chamber(s) faulty.

are leaking, brakes will not

Slack adjuster(s) faulty.

release because of loss of air

Brake components faulty.

pressure. Crimped air lines will

also restrict air flow to

brake chambers.

Repair or replace air

lines (Para 4-47) and/

or replace brake

chamber(s) (Para

4-37). Verify repair,

go to Step 5 of this

Fault.

YES

4-256