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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).
c.
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
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