SERVICE BRAKE(S) ON ONE AXLE DO NOT APPLY OR APPLY SLOWLY.

TM 9-2330-385-14

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

6. SERVICE BRAKE(S) ON ONE AXLE DO NOT APPLY OR APPLY SLOWLY.

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)

Materials/Parts

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

Solution, Soap (Item 21, Appendix E)

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

Pin, Cotter (Item 62, Appendix I)

Emergency and service air supply gladhand

Pin, Cotter (Item 63, Appendix I)

connected to truck, (Para 2-22)

Trailer air system charged, (Para 2-22)

Personnel Required

Two

NOTE

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

START

KNOWN INFO

TEST OPTIONS

Visual and audible inspection.

Truck air system OK.

Are air lines, fittings, relay

valve and brake chamber(s)

REASON FOR QUESTION

POSSIBLE PROBLEMS

free of leaks and/or crimps?

If air hose or listed components

Air lines and fittings faulty.

are leaking, service brakes will

Relay valve faulty.

not apply because of loss of air

Multifunction valve faulty.

pressure. Crimped air lines will

Brake chamber(s) faulty.

also restrict air flow to brake

Slack adjuster(s) faulty.

chambers.

Brake chambers faulty.

Tighten loose fittings,

repair or replace air

lines and/or replace

components (Para

4-47). Verify repair,

go to Step 6 of this

Fault.

YES

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