TRUCK SERVICE MANUAL
TRANSMISSION
INSPECTION AND REBUILD
Para 6-26
Fig. 6-66. Components of gear unit and main shaft assembly (HT750CRD)
(3) Remove sun gear and shaft assembly 6, and
(1) If the bushings were unserviceable or removed
thrust washer 7. If the bushings in gear and shaft
from sun gear and shaft assembly 6 (Fig. 6-66), replace
assembly 6 require replacement, replace entire shaft
the entire shaft assembly.
assembly 6.
(2) If orifice plug 36 (A, foldout 13) was removed
(4) Remove snapring 8 and ring gear 9 from the
from shaft 35, install a new plug. If orifice plug 35 (B,
front of planetary connecting drum 17.
foldout 12) was removed from main shaft 36, install a
new plug. Be sure the plug is pressed deep enough into
(5) Lift out center planetary carrier assembly 10.
the bore to clear the chamfer of the shaft. Use installer
Refer to paragraph 6-31 for rebuild of the carrier
34 (Fig. 4-3) to position the orifice plug properly (Fig. 6-
assembly.
47).
(6) Remove snapring 23. Remove low sun gear
(3) Position planetary connecting drum 17 (Fig. 6-
24.
66), front (longer internal splines) downward. Install r ear
planetary carrier assembly 25, larger carrier bore first,
(7) Remove bearing race 20, bearing 21, and
into drum 17. Retain the carrier with snapring 18.
bearing race 22.
(4) Install bearing race 14, flat side first, onto the
(8) Remove main shaft 11.
Remove center
rear of center planetary ring gear 12. Retain it with oil-
planetary ring gear 12 and its attached parts (items 13,
soluble grease. Install needle roller bearing 15 onto race
14, 15, 16, 19).
14.Retain it with oil-soluble grease.
(9) Remove snapring 13. Lift gear 12 from gear
(5) Install thick, flat bearing race 19 onto bearing
16. Remove race 14, bearing 15, and race 19.
15. Retain it with oil-soluble grease.
(10) Remove snapring 18, and lift rear planetary
(6) Install rear planetary sun gear 16 into the rear of
carrier assembly 25 from drum 17. Refer to paragraph
center planetary ring gear 12. Retain it with snapring 13.
6-34 for rebuild of carrier assembly.
(7) Install main shaft 11, smaller end first, through
the parts (12, 13, 14, 15, 16, 19) assembled above.
NOTE
Install shaft 11 and its assembled parts into drum 17 until
bearing race 19 seats in the front counterbore of rear
Refer to paragraph 6-2, above.
planetary carrier assembly 25.
(8) Install bearing race 22, flat side first, onto the
b. Assembly (A, foldout 13)
rear hub of rear planetary carrier assembly 25. Retain it
with oil-soluble grease. Install bearing 21, and thick,
766
