Assemble the final planet assembly

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Assemble winch

TM-55-1905-217-34 Landing Craft Mechanized; Steel; DED; Overait Length 74 Feet Mod 1 Marl VIII Navy Design LCM-8 Manual

Figure 4-46. Winch alinement

TM 55-1905-217-34

housing. The spline at the end of the motor shaft will engage with the gear in the primary planet assembly (12)

and the motor will pilot into the planet hub bushing. It may be necessary to rotate the motor assembly (8)

slightly so that the spline at the end of the motor shaft will engage with the gear (11) in the primary planet

assembly (12). The motor assembly will assemble into the primary housing easily by tapping the outside of the

motor assembly lightly with a copper drift until the snap ring (7) can be installed. Do not use force to install the

motor assembly (8). If there is interference remove the motor assembly and investigate.

(h) Once the motor assembly (8) is in place install snap ring (7) and make sure that it is properly seated

in the bottom of the snap ring groove all the way around the housing (21). When snap ring (7) has been

installed, rotate the motor assembly in the primary housing to locate the motor ports at the required angle for

the particular installation.

(i) Lubricate preformed packing (6) with grease and install it in its groove on the motor assembly (8).

After the preformed packing is installed lubricate it again with grease.

(j) Install the brake springs (5) in the same symmetrical pattern as they were in before disassembly. In

most cases there will be a spring for every hole but in some installations fewer springs are used and it is

important that the springs be installed in a symmetrical pattern for an even load on the brake.

(k) Lubricate preformed packing (4) with grease and install it in its groove in the spring cover (3). Once

the preformed packing is installed lubricate it again.

(l) Install the spring cover (3) over the motor assembly so that the vent port is located in the correct

position for the particular installation.

(m) Install cap screws (1) with washers (2). Screw in all the cap screws to be finger tight and then

tighten them evenly by one half turn at a time progressively around in a clockwise or

counterclockwise direction. Care must be used to insure that the spring cover (3) remains parallel to

the end of the primary housing (21) as it is tightened into place. Torque load the cap screws to 50

foot pounds.

(4) Assemble the final planet assembly.

(a) Install the snap rings (3, fig. 4-45) in the groove in the bore of the planet gear (4). Press the ball

bearings (2) into the final planet gear (4) so that the ends of the bearings shoulder against the snap rings (3).

(b) Place the final planet gear (4) into the final planet hub (6) so that the bore of the bearing lines up with a

planet pin hole.

the planet gear and the drilled hole in the final planet pin lines up with the hole in the rim of the final

planet hub.

(d) Install pin (1) and using 3/16 inch diameter pin punch, drive the pin in until the outer end of the pin is

7/16 inch below the outside diameter of the final planet hub (6).

(e) Repeat the above for the remaining two final planet gears (4) and check that all the gears run freely.

(5) Assemble the final drive assembly.

(a) Lubricate preformed packing (11, fig. 4-43) with grease and install it over the taper seal ring (12)

which is installed on the sun gear shaft (13).

(b) Check that the snap ring (10) is in place on the sun gear shaft (13) and install the sun gear shaft in

the winch so that it engages in the splined bore of the primary planet hub. Slide the sun gear shaft

(13) in until the snap ring (10) contacts the end of the primary planet hub, at the same time

preformed packing (11) will contact the seal face on the end of the drum and be pushed up the

tapered diameter of the tapered seal ring (12).

the final housing (1) and the splined bore of the planet hub locates over the splined end of the drum.

Tap the planet assembly (2) into place until it contacts the bearing that carries the drum in the final

housing (1).

(d) Install the thrust plate (3) in the end of the final planet assembly (2).

(e) Lubricate preformed packing (5) with grease and install in its groove in the end cover

(4). Give the preformed packing an additional coat of grease and install the end cover in the final housing (1)

so that the filler boss will be located at the bottom of the final housing when the winch is mounted. Make sure

that the end cover is properly seated against the end of the gear teeth in the final housing.

(f) Install the retaining ring (6) and make sure that it is properly seated in the bottom of the retaining ring

groove all the way around the housing (1).

(g) Fill the final housing (1) with SAP, 90 transmission oil to the level of the filler hole and install the filler

plug (7).

(6) Winch alinement.

(a) When the assembly of the winch has been completed and secured to its mounting base, check the

alignment of the winch according to the instructions in the following paragraph.

4-71