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TM 5-4210-220-34
3-7.
TRANSMISSION-Continued
aa. Center Planetary Gear Overhaul
(1)
Center planetary gear overhaul requires tools
J25587-1 Fixture
J25587-29 Pin Remover
J25587-67 (four) Loading Pin
J25587-47 (four) Guide Pin
J25587-30 Pin Installer
J25587-17 Swaging Tool Holder
J25587-21 (two) Swaging Tool
J25587-3 Support Block
(2)
Drill out planetary pins drilled from front side of carrier. Place carrier assembly in fixture with drilled pins
up. Install pin remover J25587-29 into fixture ram.
(3)
Press out four pins. Remove and keep
four groups separate.
(4)
Inspect carrier (2) for excessive wear.
Replace damaged or excessively worn
housings.
(5)
Install loading pin J25587-67 in each
pinion (5). Install roller bearing (6) on pin
then steel and bronze thrust washers (3
and 4) on each end. Lubricate needle
bearings with transmission fluid (item 23,
Appendix B) before installation of groups
into carrier.
(6)
Place carrier front side up and place all
pinion groups into carrier. Install guide
pins J25587-47, large diameter first in
place of loading pins.
(7)
Put carrier on fixture in press. Insert pin installer J25587-30 into fixture ram.
Do not put pressure on the carrier. Distortion of the carrier will damage it.
NOTE
Pin installers are shaped to avoid interference with bosses on the carrier assemblies. They must be
installed in the ram so that the cutaway portion of the installer will clear the bosses when the pinion pin is
pressed in.
(8)
Place a pinion pin (1) onto the pilot end of a pin guide in carrier. Press the pinion pin into the carrier until
the installer contacts the carrier.
(9)
Install the remaining pinion pins.
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