TM 1-1520-238-23
6-110
6.20.
ENGINE NOSE GEARBOX OIL FILTER SAFETY RELIEF VALVE REPLACEMENT – continued
6.20.3. Removal
a. Remove oil filter safety relief valve (1) from
engine nose gearbox (2).
(1) Remove retaining ring (3) from gearbox (2).
(2) Remove relief valve (1) from gearbox (2).
(3) Discard relief valve (1) and packing (4).
6.20.4. Cleaning
a. Clean relief valve mounting area on engine
nose gearbox (para 1.47).
6.20.5. Inspection
a. Check relief valve mounting area for cracks.
None allowed.
b. Check relief valve mounting area for crossed,
flattened, or stripped threads. None allowed.
c. Check relief valve mounting area for nicks,
gouges, and burrs (para 6.17).
d. Check relief valve mounting area for erosion
of surface finish and corrosion (para 1.49).
e. Check retaining ring for cracks, bends, distor-
tion, corrosion, and excessive wear. None al-
lowed.
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M04-2767-3
