SERVICE BRAKE(S) ON ONE AXLE DOES NOT RELEASE OR DOES NOT RELEASE CORRECTLY.

TM 9-2330-385-14

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

7. SERVICE BRAKE(S) ON ONE AXLE DOES NOT RELEASE OR DOES NOT

RELEASE CORRECTLY.

INITIAL SETUP

Tools and Special Tools

References

Tool Kit, General Mechanic's: Automotive

TM 9-2320-364-10

Equipment Condition

Materials/Parts

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

Pin, Cotter (Item 62, Appendix I)

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

Pin, Cotter (Item 63, Appendix I)

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

Personnel Required

Emergency and service air supply gladhand

Two

connected to truck, (Para 2-22)

START

TEST OPTIONS

KNOWN INFO

Visual inspection.

Truck air system OK.

Are air lines and fittings free

of crimps?

REASON FOR QUESTION

POSSIBLE PROBLEMS

If air lines and/or fittings are

Air lines and fittings faulty.

crimped, air flow from brake

Relay valve faulty.

chambers will be restricted and

Brake chamber(s) faulty.

brakes will not release or

Slack adjuster(s) faulty.

release slowly.

Brake components faulty.

Repair or replace air

lines and fittings (see

schematic Fig FO-2 or

Verify repair, go to

Step 6 of this Fault.

YES

4-286