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 TM 55-1905-242-14
0216 00
INSPECT--BRAKE HUB ASSEMBLY (continued)
2.
Inspect the bore of the brake hub for ridges in the center area of the bore and for wear at the center and ends of the bore.
If there are definite ridges at the center of the bore or wear at any point in the bore greater than 0.001 inch in diameter, the
brake hub will require replacement. The original bore was 2.8014 inches.
3.
Check the rollers for pits, cracks, or excessive wear. Replace the rollers if any of these conditions exist.
4.
Check the camlocks for wear at the points where they contact the sun gear and brake hub. If flats are worn on the
camlocks at these points, the camlocks must be replaced.
5.
Check the snap rings for flatness and that they form a true circle. Replace any snap rings that are bent or damaged.
INSPECT--DRUM AND BEARINGS
1.
Replace all O-rings, packing, and seals.
2.
Check the seal diameters at each end of the drum for rust or roughness. Clean and polish the seal diameters, using extra
fine crocus cloth. Check the bearing hub diameters for scores and wear. If there is any wear, possibly caused by a seized
bearing, the drum must be replaced.
3.
Inspect the O-ring seal face in the bore of drum at the splined end. This face must have a smooth finish and be free from
scratches, etc. Polish the face with extra fine emery cloth if roughness and scratches are found. Replace the drum if
damage is excessive.
4.
Inspect the drum bushing for bruises, scores, and wear. Use a scraper to remove all high spots. The original inside
diameter of the bushing was 2.190 inch. If wear is greater than 0.010 inch, replace the bushing.
5.
Inspect all ball bearings for wear and pitting at the balls and ball grooves. Replace any bearings that are worn or pitted.
ASSEMBLY--BEARINGS AND SEALS TO DRUM
1.
Install the oil seal (54) in the small seal ring (53) so that the tip of the oil seal is at the end of the small seal ring (52) farthest
from the O-ring groove.
2.
Lubricate the O-ring (55) with grease and install it in the groove on the outside diameter of the small seal ring (53).
3.
Lubricate the oil seal (54) with grease, give the O-ring (55) an additional coat of grease, and install this seal assembly on
the nonsplined end of the drum (52) so that the lip of the oil seal is towards the drum. Be careful not to damage the lip
of the oil seal as it is pressed over the taper on the seal diameter of the drum.
4.
Pack the oil seal (54) with grease around the seal diameter of the drum (52).
5.
Install the oil seal (60) in the large seal ring (59) so that the lip of the oil seal is at the end of the large seal ring which has
the projecting diameter at the bore.
6.
Lubricate the O-ring (61) with grease and install it in the groove on the outside of the large seal ring (59).
7.
Lubricate the oil seal (60) with grease, give the O-ring (61) an additional coat of grease, and install this assembly on the
splined end of the drum (52) so that the lip of the oil seal is towards the drum. Be careful not to damage the lip of the oil
seal as it is pressed over the taper on the seal diameter of the drum.
8.
Pack the oil seal (60) with grease around the diameter of the drum (52).
9.
Install the bearing (51) on the nonsplined end of the drum (52) so that the groove on the outside diameter of the bearing
is installed towards the drum. Pack the bearing thoroughly with grease.
0216 00-9
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