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TM 5-4210-220-12
4-18. PUMP, PIPING, AND VALVES - Continued
4-18.7. Pressure Relief Valve
This task covers
a.
Removal
b.
Installation
c.
Test
TOOLS
MATERIALS/PARTS
Tool Kit, Master Mechanic,
22, Appendix E Pipe Sealant
NSN 4910-00-754-0705
20-1 Relief Valve
EQUIPMENT CONDITION
All Piping Drained
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
NOTE
Access to the pressure relief valve can be gained via the removable pump body access panel.
REMOVAL
(1)
Remove the pressure relief valve (1) from the discharge manifold coupling (2).
(2)
Clamp the body of the pressure relief valve (1) in a vise.
(3)
Using a pipe wrench, remove the 90 deg. elbow (3) from the body of the pressure relief valve (1).
INSTALLATION
(1)
Clean and inspect all threads on pressure relief valve (1), discharge manifold coupling (2) and 90
deg. elbow (3) Replace components if threads are stripped or corroded.
(2)
Apply pipe sealant (item 22, Appendix E) to the threads of the 90 deg. elbow (3).
(3)
With the pressure relief valve (1) clamped in a vise, install 90 deg. elbow (3). Ensure the elbow drain
is facing down as shown.
(4)
Apply pipe sealant (item 22, Appendix E) to the threads of the pressure relief valve (1) and install into
the discharge manifold coupling (2). Ensure the 90 deg. elbow (3) faces the rear of the truck.
4-236
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