PARKING BRAKE CONTROL VALVES -706880546

TM 5-4210-233-14&P-1

4-145. PARKING BRAKE CONTROL VALVES

THIS TASK COVERS:

Removal

Follow-on Maintenance

Installation

TOOLS REQUIRED

EQUIPMENT CONDITION

Tool Kit, General Mechanics, Automotive

Main Engine Shutdown (see para 2-12.)

(Appendix B, Section 1II, Item 1)

APU Shutdown (see para 2-16.)

Batteries Disconnected (see para 4-114.)

MATERIALS/PARTS REQUIRED

All Air Tanks Drained

Pipe Sealant (Item 2, Appendix E)

a. Removal.

WARNING

Death or serious injury could occur if compressed air is directed

against the skin. Always drain air tanks via the draincocks prior

to maintaining the parking brake valves.

NOTE

The following procedure covers replacement of the PARKING

BRAKE control, the EMERGENCY PARKING BRAKE

RELEASE, and the FRONT WHEEL LOCK control. Remove

and replace components as necessary.

(1) Remove eight screws (1) with washers (1 A) to loosen two panels.

(2) Remove six nuts (2) and six washers (3) and three U-bolts (4) and remove six washers (5) and six nuts

(6) from U-bolts (4).

(3) Remove set screws (7) and control knobs (8).

(4) Tag and disconnect air hoses from brake valves (10).

(5) Remove retaining nuts (9) to remove control valves (10).

(6) Remove all pipe fittings (11) and (12).

(7) Remove parking brake switch (13) and retain.

b. Installation.

(1) Coat all threads with sealant (Item 2, Appendix E). Install fittings (11 and 12) and switch (13)

on valves (10).

(2) Install three control valves (10) to control panels (1 B and 1 C).

(3) Connect air hoses to brake valves (10).

(4) Secure brake valves (10) with retaining nuts (9).

4-417