CHAPTER 8: MAINTENANCE OF SUSPENSION SYSTEM
TM 9-2350-256-20
8-10 REPLACE FINAL DRIVE SPROCKET AND HUB--Continued
WARNING
Sprocket is heavy. If sprocket is dropped, it may cause serious injury.
8
Remove inner sprocket (10) by installing three
jackscrews (14) in three holes provided. Tighten
jackscrews evenly and remove sprocket.
b. INSTALLATION
WARNING
Sprocket is heavy. If sprocket is
dropped, it may cause serious injury.
1
Install inner sprocket (10), 11 bushings (12), and 11
bolts (11) to track-drive hub (9). Torque bolts to
225-250 lb-ft (305-339 Nm).
2 Lubricate threads of 11 bolts (11) and 11 nuts (13)
with GAA grease and install nuts. Torque nuts to
70-90 lb-ft (95-122 Nm).
WARNING
All personnel are to stand clear of
vehicle hull when lifting. Sling failure
may cause severe injury or death.
3
Install lifting sling assembly and sling assembly on
track-drive hub (9).
4 Loosely install track-drive hub (9) and sprocket (10)
with dowel nut (8) to prevent track-drive hub from
falling. Remove lifting sling assembly and sling
assembly.
5 Lubricate mating surfaces of flange on final drive
and track-drive hub (9) with GAA grease.
6 Lubricate threads of 10 dowels (15) with GAA grease and install remaining dowel nuts (8). Torque dowel nuts to 450-
470 lb-ft (610-637 Nm). Wait 3 minutes and retighten dowel nuts. Wait 1 minute and check torque again.
7 Install outer sprocket (6), 11 bushings (4), and 11 bolts (3) to track-drive hub (9). Torque bolts to 225-250 lb-ft (305-
339 Nm).
8 Lubricate threads of 11 bolts (3) and 11 nuts (5) with GAA grease and install nuts. Torque nuts to 70-90 lb-ft (95-122
Nm).
9 Install hinged rear fender (2) with seven screws (1).
8-34