TM 1-1520-238-23
Change 8
6-142.3
6.30A.
ENGINE NOSE GEARBOX LUBE PUMP CARTRIDGE REMOVAL/INSTALLATION – continued
6.30A.4. Cleaning
a. Clean removed and attaching parts or surfaces (para 1.47).
6.30A.5. Inspection
a. Check exposed bearing for discoloration, metal chips, or flakes.
(1) Replace gearbox if damaged.
b. Check inside housing pump packing seats for nicks, scratches, dents, and grooves. None allowed.
c. Check pump for nicks, scratches, gouges, and burrs.
(1) Repair damage 0.030 INCH or less deep by blending. Blended areas shall not exceed 1 INCH in diameter,
must be at least 1 INCH apart, and must not total more than 30 percent of lube pump surface area.
d. Check pump packing grooves for damage. None allowed.
e. Check that holes are clean and clear of obstructions.
f. Check pump for chipped, broken, and cracked housing. None allowed.
g. Check pump for missing or damaged hardware. None allowed.
h. Check pump for corrosion (para 1.49).
i. Check pump for damaged threaded inserts. None allowed.
j. Check pump for evidence of overheating. None allowed.
k. Check pump for chipped or broken gear teeth. None allowed.
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