TM 1-1520-238-23
7-412
7.110.
UTILITY HYDRAULIC AUXILIARY RETURN CHECK VALVE REPLACEMENT – continued
7.110.3. Removal
a. Remove check valve (1).
(1) Place rags and pail under check valve (1) to
catch hydraulic fluid spills. Use pail.
(2) Hold check valve (1). Remove nuts (2) and
(3) from check valve (1).
(3) Remove and discard check valve (1).
7.110.4. Cleaning
a. Wipe attaching parts with a clean rag.
7.110.5. Inspection
a. Check nuts for nicks, scratches, rounded
flats, and stripped or damaged threads (para
7.56).
b. Check attaching parts for corrosion (para
1.49).
7.110.6. Installation
a. Install new check valve (1) with arrow on valve
pointing away from 90 degree tube bend to-
ward right side of aircraft.
(1) Lubricate threads of check valve (1). Use
clean hydraulic fluid (item 92, App F).
(2) Hold check valve (1). Install nuts (2) and (3).
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