PRESSURE RELIEF VALVE (PUMP DE-STROKE) -706880614

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

4-191. PRESSURE RELIEF VALVE (PUMP DE-STROKE)

THIS TASK COVERS:

a. Valve Cartridge Replacement d. Follow-on Maintenance

b. Solenoid Replacement

c. Valve Block Replacement

TOOLS REQUIRED

EQUIPMENT CONDITION

Tool Kit, General Mechanics, Automotive

Main Engine Shutdown (see para 2-12.)

(Appendix B, Section 1IJ, Item 1)

APU Shutdown (see para 2-16.)

Batteries Disconnected (see para 4-114.)

MATERIALS/PARTS REQUIRED

Pull-out Treadplate Pulled Out (Driver's Side)

Tags (Item 32, Appendix E)

Hydraulic Oil (Item 28, Appendix E)

Caps, Shipping and Sealing (Item 39, Appendix E)

O-ring (Figure 198, Appendix F)

a. Valve Cartridge Replacement. To replace valve

cartridge (1), unscrew cartridge from valve block

(2). Remove and discard O-ring. Install new O-ring

on valve cartridge and install cartridge in valve

block. Tighten securely.

b. Solenoid Replacement.

(1) Loosen screw (3) and remove plug (4) from

solenoid (5).

(2) Remove nut (6) and remove solenoid (5) from

valve block (2).

(3) Install new solenoid (5) on valve block (2) as

shown and install nut (6).

(4) Connect plug (4) to solenoid (5) and tighten

screw (3).

Valve Block Replacement.

(1) Loosen screws (3) and remove plug (4) from

solenoid (5).

(2) Tag and disconnect three hoses (7, 8 and 9)

and tube (1O) from valve block (2). Plug ends

of hoses and tube and parts in block to prevent

entry of dirt.

(3) Connect hydraulic tube (1 0) to new valve block (2

(4) Connect three hydraulic hoses (7, 8 and 9) to

valve block (2).

(5) Connect plug (4) to solenoid (5) and tighten

screw (3).

4-485