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 TM 55-1905-242-14
0216 00
CLEANING
1.
Don protective gloves and goggles.
2.
Clean all metal parts with cleaning solvent and dry them with clean wiping rags.
INSPECTION
NOTE
Replace any parts that fail the inspection process.
INSPECT--FINAL DRIVE ASSEMBLY
1.
Replace all O-rings, packings, and seals.
2.
Check the snap rings for flatness and that they form a true circle. Replace any snap rings that are bent or damaged.
3.
Check for wear at the center of the thrust plate. The original thickness at the center of the thrust plate is 1.363 inches
Replace the thrust plate if wear is greater than 3/32 inch.
INSPECT--FINAL DRIVE ASSEMBLY
NOTE
If any one of the gears in the final drive assembly requires replacement because of tooth
wear, all of the gears in the assembly should be replaced.
4.
Inspect the gear teeth in the final housing. If wear is greater than 0.015 inch when compared to the unworn part of the
teeth, replace the final housing.
5.
Check the large pilot bore at the end of the final housing used to carry the end cover. Remove all roughness and scores
carefully using a scraper and extra fine crocus cloth so that the O-ring will seal on this diameter.
6.
Inspect the sun gear shaft. Check the gear teeth for wear by comparing the tooth thickness at the worn area of the teeth
with the tooth thickness at the unworn end. If wear is greater than 0.012 inch, replace the sun gear shaft.
7.
Inspect the taper seal ring for roughness or scratches. If these defects are found, replace the taper seal ring.
INSPECT--FINAL PLANET ASSEMBLY
1.
Inspect the planet pin bores in the planet hub for scores or 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.
NOTE
the same time.
2.
Inspect the planet pins for excessive wear at the bearing area. If wear exceeds 0.001 inch on the diameter, the pins should
be replaced.
3.
Check the planet gears for wear and damage on the gear teeth. If wear is excessive, replace the planet gears. Also replace
the planet gears if the sun gears or final drive housing will be replaced.
4.
Inspect the ball bearings for wear and pitting at the balls and ball grooves. Replace the bearings if worn or pitted.
0216 00-7
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