Toro 07390 Workman HDX-Auto, Руководство по обслуживанию, Страница: 90 / 280

Workman HDX Auto Page 4 − 46 Drive Train
Differential Inspection
1. Thoroughly clean and dry all internal rear differential
parts.
2. Use emery cloth to remove nicks and burrs from all
differential components.
3. Inspect all gear teeth for roughness, material transfer
or other damage. Cracked, broken, missing or chipped
gear teeth are not acceptable. Replace gears if worn or
damaged.
4. Inspect splines on pinion gear (item 10) and output
gears (items 22 and 23). If cracked, broken, chipped or
missing splines are found, replace shaft.
5. Inspect I.D. of all gears for excessive wear or scoring.
Gears should fit snugly on shafts.
6. Inspect all shaft bearing surfaces for wear or dam-
age. Replace worn components.
7. Inspect oil seal surfaces of shafts for wear or damage
and replace shafts if necessary.
8. Inspect shift fork (item 32) and engagement dog
(item 2):
A. The shift fork should move freely in the groove of
the pin clutch. The fork should also pivot easily be-
tween the output cover and fork retainers.
B. The engagement tabs of the shift fork should not
have excessive scoring at surfaces that contact the
engagement dog groove.
C. The tabs on the engagement dog should not be
worn or damaged.
9. Inspect differential gear case for wear in the pinion
shaft area. Replace the case (or complete differential as-
sembly) if machined surfaces are scored or if the pinion
shaft bearing fits loosely in the gear case bearing bore.
Rear Differential Assembly (Fig. 48)
1. Clean sealant material from differential output cover
and gear case mating surfaces before differential as-
sembly. Make sure all differential parts are clean.
2. If bearing (item 13) was removed from output cover,
install new bearing into output cover bore fully to shoul-
der of bore. Press only on outer race of bearing during
installation.
3. If bearing (item 29) was removed from differential
housing, install new bearing onto housing fully to shoul-
der of housing. Press only on inner race of bearing dur-
ing installation.
4. Make sure that expansion plugs (item 24) are secure
in output gears (items 22 and 23). If new expansion
plugs are being installed into gears, thoroughly clean in-
side of gears and apply Loctite #680 retaining com-
pound to OD of new plug before installation. Press plugs
fully to internal shoulder of output gears.
5. If removed, install seal (item 37) and coupler (item
30) onto pinion gear:
A. Apply grease to O−ring (item 36) and install onto
pinion.
B. Apply multi−purpose grease to lips on new seal
and area between them. Install seal into gear case
taking care to not damage case bore during seal re-
moval.
C. Install lock washer set (item 8) onto pinion gear
(Shown in Fig. 51). Make sure that the wider serra-
tions on the washer halves are orientated against
each other.
D. Apply high strength thread locker (red) to threads
of pinion gear.
E. Use a suitable wrench on coupler to prevent the
coupler and pinion gear from rotating. Secure cou-
pler to pinion gear with hex nut (item 7). Torque nut
from 195 to 215 ft−lb (265 to 291 N−m).
6. If the shift fork (item 32) was removed from output
cover, install shift fork (shown in Fig. 50):
A. Slide torsion spring onto shift fork peg.
B. Position shift fork with attached torsion spring on-
to output cover.
IMPORTANT: The Torx screws (item 4) used to
secure the shift fork to the output cover have a
patch lock on the threads to prevent loosening of
the screws. Either replace screws or apply medi-
um strength thread locker to threads of original
screws before assembly.
C. Secure shift fork to output cover with fork retain-
ers and Torx screws. Fork retainers should rest flush
onto cover surface. Torque screws from 7 to 10 ft−lb
(9.5 to 13.5 N−m).
D. After installation, make sure that shift fork pivots
freely and torsion spring presses shift fork tab
against solenoid hole in output cover.