Service Manual
HGM-H 23
If the unit has been torn down completely, the
following summary identies the assembly pro-
cedures necessary to completely assemble the
unit. Each assembly procedure is located by a
page reference.
The part reference numbers provided in each
assembly procedure are keyed to the individual
exploded views, and are also keyed to the com-
plete unit exploded view on page 24.
1. Install the brake shaft (50) and cam as-
sembly (51, 52) to the middle housing (2).
Page 20
2. Install the inboard axle bearing (27).
Page 19
3. Install the motor shaft (34), washer (33),
brake rotor (32), motor shaft gear (31), re-
taining ring (30). Page 19
4. Install the block assembly (40) onto the mo-
tor shaft (34). Page 18
5. Install the retaining ring (46) and washer
(47) onto the motor shaft (34). Page 17
6. Install the thrust bearing (45), o-ring (6),
housing cap (3) and housing cap screws
(7). Page 17
7. Install the three planet gears (22) onto the
carrier (20) and then onto the axle shaft
(16). Install the sun gear (23) onto the axle
shaft (16). Install the bull gear (24), thrust
spacer (25) and retaining ring (26) onto the
axle shaft and set assembly aside. Place
the axle assembly into the main housing.
Install the ring gear (21) onto the axle shaft
so that the teeth mesh with the planet gears
and install the washer (15) and axle bearing
(14) onto the axle shaft (16). Page 16
Note: Make sure that two of the tabs on the
outer diameter of the ring gear (21)
locate between the tabs cast into the
main housing.
- Some models will have the sun gear
(23) and the bull gear (24) as one
pressed gear.
ASSEMBLY AFTER A COMPLETE TEARDOWN
8. Apply sealant material onto housing middle
housing (2). Page 21
9. Install the axle housing (1), the 12 housing
screws (4), and the axle seal (13).
Page 15
10. Install brake dowel pin (84), brake seal (58),
brake spacer (57), and spring spacer (81).
Page 14
11. Install the brake arm spring (82), the spring
pin (83), the brake arm (59), and the retain-
ing ring (60). Page 14
12. Install the axle key (17), hub assembly (11),
axle nut (10), cotter pin (18) and axle cap
(9). Page 13
13. Install the unit into the machine and ll the
case with 34 . oz. of uid after lling the
hydraulic system. Page 8