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 TM 55-1905-242-14
0216 00
INSPECT--PRIMARY DRIVE ASSEMBLY
1.
Replace all O-rings, packing, and seals.
2.
Inspect the bore in the spring cover for scores or bruises. If possible, smooth out scores or bruises with a scraper and
extra fine crocus cloth so that the O-ring will seal effectively after assembly.
3.
Check the snap ring for flatness and that it forms a true circle. Replace the snap ring if it is bent or damaged.
4.
Inspect the teeth in the primary housing for wear. If wear is greater than 0.015 inch when compared to the unworn part
of the teeth, replace the primary housing.
5.
Inspect the friction surfaces of the brake plate. If wear has removed the grooves, replace the plate.
INSPECT--PRIMARY PLANET ASSEMBLY
1.
Replace all O-rings, packing, and seals.
2.
Check the planet hub. Inspect the seal diameter for scores or roughness. Try removing roughness with extra fine crocus
cloth. If the roughness cannot be removed completely in this way, replace the planet hub.
3.
Inspect the planet pin bores for scores and bruises that may have been caused in removing the planet pins. Sufficiently
remove the high spots of any scores or bruises carefully with a scraper to allow a planet pin to be pressed into each bore
by hand.
4.
Inspect the pins for damage. If they are bent or distorted, discard them.
NOTE
placed at the same time.
5.
Inspect the planet pins for excessive wear at the bearing and cam lock areas. If the wear at the bearing area is greater than
0.001 inch on the diameter when compared with the unworn areas, the planet pins should be replaced.
6.
Check the planet gears for wear and damage on the gear teeth. If wear is excessive, replace the planet gears.
7.
Inspect the needle bearings for freeness of the rollers. Check for pits, broken rollers, or excessive wear on the bronze
bearing cage or flange. Replace the bearings if any of these conditions exist.
8.
Check the thrust plugs for wear on the flange end. If the flange has worn down to 1/32 inch thick, the thrust plugs will
require replacement.
9.
Check the thrust pad for wear on its slotted face. If wear exceeds 1/8 inch, replace the thrust pad. Original thickness of
the thrust pad was 0.500 inch.
10. Check the bushing for wear on the bore and flange. If the flange has worn to 1/32 inch thick, replace the bushing.
INSPECT--BRAKE HUB ASSEMBLY
NOTE
If the sun gear requires replacement, all of the other primary drive gears, including the
sun gear, should be replaced at the same time.
1.
Inspect the sun gear for excessive wear at the bearing and camlock areas. If wear is greater than 0.001 inch on the
diameter when compared with the unworn areas, the sun gear should be replaced.
0216 00-8
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