TM 9-2320-280-34
17-10. GEAR UNIT REPAIR (3L80) (Cont'd)
d. Assembly
CAUTION
All transmission parts must be lubricated with clean transmission
fluid before assembly. Foreign material will cause transmission
damage.
NOTE
For general assembly instructions, refer to para. 2-16.
If replacing mainshaft, make sure orifice cup plug in service
mainshaft is removed.
1.
Install mainshaft (1) in rear internal gear (2) and secure with snapring (3).
2.
Install large bearing race (7), thrust bearing (6), and small bearing race (5) (with inside diameter
flange facing thrust bearing (6)) on mainshaft (1).
3.
Install output carrier (4) on mainshaft (1) and rotate carrier (4) until seated.
4.
Install small diameter bearing race (13) (with inside diameter flange facing up), thrust bearing (12),
and large bearing race (11) (with outside diameter flange facing thrust bearing (12)) on rear internal
gear (2).
5.
Install output shaft (10) on output carrier (4) and secure with snapring (9).
6.
Install case thrust washer (8) on output shaft (10) and retain with petrolatum.
7.
Turn gear unit over.
8.
Install reaction carrier thrust washer (23) on output carrier (4) with tabs on thrust washer (23)
fitting in pockets in output carrier (4).
9.
Install sun gear (21) on mainshaft (1), with bevel on inside diameter splines (20) facing down, and -
into output carrier (4).
NOTE
When a new output carrier and/or reaction carrier is being installed
and front internal gear ring prevents assembly of carriers, replace
front gear ring with replacement gear ring.
10.
Install front internal gear ring (22) and reaction carrier (15) on output carrier (4) so pinion gears
mesh with sun gear (21).
11.
Install sun gear shaft (19) into sun gear (21) with long splines fitting into sun gear (21).
12.
Install large bearing race (18) (with inside diameter flange facing up), thrust bearing (17), and small
bearing race (16) (with inside diameter facing up) on sun gear shaft (19).
13.
Install roller clutch (14) in reaction carrier (15).
14.
Install center support thrust washer (25) in recess of center support (24). Retain thrust washer (25)
with petrolatum.
NOTE
With reaction carrier held, center support should only turn counter-
clockwise.
15.
Install center support (24) in reaction carrier (15).
16.
Install gear unit holding tool and slide hammer adapter to hold assembly together.
17-40
