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 TM 55-1905-217-34
(b) Drain the oil from the primary housing (21) by removing one capscrew (1) with its seal washer
(2) from the lowest point of the spring cover (3). Remove one pipe plug (22) from the top of the housing (21) to
allow air to enter the housing.
(c) Remove the spring cover (3) using the following procedure. Remove the remaining cap
screws (1) with washers (2) by slackening each cap screw (1) half a turn at a time, progressively around in a
clockwise or counterclockwise direction. Care must be used to insure that the spring cover (3) is removed
evenly as it carries the full spring load for the brake. When all the spring load has been removed from the
spring cover (3) it can be withdrawn from the winch.
(d) Remove and discard preformed packing (4) from the spring cover (3).
(e) In most cases there will be a spring in every hole, but in certain applications fewer springs are
required and it is important that they be located symmetrically when they are replaced. Note and mark any hole
that does not contain a spring and then remove all the springs.
(f) Remove and discard the preformed packing (6) from the motor assembly (8).
(g) Remove snap ring (7) and motor assembly (8). Gearmatic tool No. B 13009 can be used to
remove the motor assembly (8).
(h) The primary sun gear (11) may have been removed with the motor assembly (8) in step g. If
not, remove the primary sun gear (11) from the bore of the primary planet assembly (12).
(i) Remove the retainer (9) from inside of the segments (10), then remove the segments (10)
from the primary housing. Before removing the primary planet assembly (12), first remove the sun gear shaft.
See instructions for the final drive assembly ( (1) (e) above).
(j) When the sun gear shaft has been removed, remove the primary planet assembly (12).
(k) Remove the remaining parts in sequence as shown by the item numbers (13) thru (23).
(l) Remove the nuts (8, fig. 4-43) and washers (7) that attach the primary drive housing (21, fig.
(m) If the final drive assembly has already been removed from the winch base, remove the drum
(20, fig. 4-43). Support the drum under the center of the barrel, and drive it off the primary housing by tapping
the inside face of the drum flange opposite to the primary housing.
(n) If the final drive assembly has not been removed, remove the primary housing as follows: For
primary housings with tapped puller holes in the flange, use two 1/2 inch N.C. x 2 inch cap screws as jacks and
pull the housing off the dowel bolts (6). For primary housings with cast slots under the edge of the flange, use
two heel bars and remove the housing from the dowel bolts.
(3) Disassembly of drum bearings and seals.
(a) Remove bearing (1, fig. 4-43) from the drum (20) using a special puller to grip in the groove
provided in the O.D. of the bearing. Support the puller screw on a plug located in the bore of the drum.
Gearmatic tool No. C 13115 can be supplied for removing this bearing.
(b) Remove the small seal ring (3) which contains oil seal (4) and preformed packing (2).
Remove and discard the preformed packing and the oil seal.
(c) Remove the drum bushing (5) with a bearing puller only if it requires to be replaced.
(d) To remove bearing (18) first remove the snap ring (17) from its O.D. Using the same puller
as used above, place a plug located in the bore of the drum and pull the bearing by gripping in the snap ring
groove on the O.D. of the bearing.
(e) Remove the large seal ring (15) which contains oil seal (14) and preformed packing (16).
Remove and discard the preformed packing and the oil seal.
(4) Disassembly of final planet assembly.
(a) Using a 1/4 inch diameter pin punch, drive pin (5, fig. 4-45) completely into the final planet
pin (1).
4-67
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