15
5. Separate the brake cylinder from the main housing
and remove and discard the O-ring from the brake
cylinder.
6. Remove the sun gear (item 20) and the planetary
carrier assembly. Keep the thrust washer (item 21) with
the planetary carrier for inspection when the gear set
is serviced.
7. Separate and remove the two halves of the split ring
(item 12). Support the main housing as shown above
and press out the output shaft (item 4). The two tapered
roller bearing cups and cones (items 6, 7, 8, & 9) can
now be removed from the housing and output shaft.
Remove the seal (item 5) from the main housing.
Remove the vent plug (item 39) from the housing, clean
in solvent and reinstall. DO NOT paint over the vent or
replace it with a solid plug. If one of the oil drain plugs
was removed, clean the plug and hole, apply a light coat
of thread sealing compound to the plug and re-install it
into the housing. Thoroughly clean and inspect the hous-
ing for damage. Check the ring gear teeth (machined
into the inside of the housing) for nicks, spalling or exces-
sive wear. Replace the housing if gear tooth wear is
greater than 0.015 in. (0.4 mm) when compared to
unworn area of teeth.
This completes disassembly of the capstan drive.
PLANET CARRIER
SERVICE
Disassembly
1. Each planet gear is removed by first driving the rollpin
(item 18) into the planet gear shaft (item 15). The planet
gear shaft can then be pushed through the planet car-
rier (item 13). Drive the rollpin out of the shaft and dis-
card. Remove the planet gear (item 14) and two thrust
races (item 16). The two roller bearings (item 17) and
bearing spacer (item 19) are then removed from the
planet gear.
Repeat this procedure for each of the other two gears.
Thoroughly clean all parts and inspect for damage and
wear. The bearing rollers should not exhibit any irreg-
ularities. If the rollers show any sign of spalling, corro-
sion, discoloration, material displacement or abnormal
wear, the bearing should be replaced. Likewise, the cage
should be inspected for unusual wear or deformation,
particularly the cage bars. If there is any damage that
will impair the cage’s ability to separate, retain and guide
the rollers properly, the bearing should be replaced. The
thrust washer contact areas should be free from any
surface irregularities that may cause abrasions or fric-
tion. The gears and shafts should be inspected for abnor-
mal wear or pitting and replaced if necessary.
