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 NOTE
When installing the planetary gear assembly, the reverse ring must be raised up to permit
the planetary gears to mesh with the internal teeth of the ring gear.
(u) Lubricate the second reverse sun gear thrust washer (26, fig. 3-89) with engine oil; then, place the
thrust washer over the end of the drive shaft and over the end of the planetary hub.
(v) Install the planetary gear retaining washer (30) over the end of the drive shaft and against the end of
the planetary hub.
(w) Install the planetary gear retaining ring (27) in the groove in the drive shaft next to the retaining
washer, using a pair of snap ring pliers.
f. Installation.
(1) Affix a new gasket to the forward face of each reverse gear housing.
(2) Support the reverse gears and adapter plate with two rope slings and a chain hoist.
(3) Lubricate the pilot bearing surface and the splines on the forward end of each reverse gear drive shaft with
engine oil.
(4) With the blocking still in place beneath the two flywheel housings, same as when the reverse gears and adapter
plate assembly was removed, position the assembly directly in back of the engines with the forward end of the drive shafts
in line with the center of the flywheels.
(5) Move the reverse gears and adapter plate forward and pilot the drive shafts straight into and through the hub of
each forward clutch plate.
NOTE
If the splines on the drive shafts do not readily engage those in the hub of each clutch plate,
press forward slightly on the assembly and at the same time, turn one or both of the drive
shafts slightly to aline the splines.
(6) With the drive shafts entered into the hubs of the clutch plates, continue to push the assembly forward and pilot
the drive shafts straight into the pilot bearings, then enter the pilot on the reverse gear housings straight into the flywheel
housings.
NOTE
If the sun gear does not readily enter the forward clutch drive plates, rotate the drive shafts
very slowly until the sun gears enter the drive plates.
(7) Install the bolts and lock washers securing the reverse gear housings to the flywheel housings. Tighten the
bolts to 30-35 ft-lb torque.
(8) Install the power transfer gear assembly (para 3-15).
3-27. Crankshaft Front Cover
a. General.
(1) The crankshaft front cover is mounted against the end plate at the lower front end of the engine as shown in
figure 3-95. It serves as a housing for the vibration damper. The engine is supported at the front end by means of engine
supports attached to the front cover.
3-135
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