Toro Groundsmaster 7200 Service Manual page 193

Disassembly (Figs. 16 and 17)
NOTE: Refer to the Polar Trac
additional information regarding drive track and wheel
removal.
1. Park machine on a level surface, lower implement,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Remove wheels as needed to gain access to wheel
hub(s) (see Polar Trac
Wheels Removal in this sec-
TM
tion).
3. Make sure that machine is supported with jack
stands.
4. Remove the dust cap from the wheel hub.
5. Remove the cotter pin and slotted hex nut. Slide the
wheel hub with bearings from the spindle shaft.
6. Remove the seal from the wheel hub. Discard seal.
7. Remove the bearing cones from both sides of the
wheel hub.
8. Clean the bearings in solvent. Make sure the bear-
ings are in good operating condition. Clean the inside of
the wheel hub. Check the bearing cups for wear, pitting
or other damage. Replace all worn or damaged parts.
Assembly (Figs. 16 and 17)
1. If bearing cups were removed from the wheel hub,
press new cups into the hub until they seat against the
shoulder of the hub.
IMPORTANT: The lip of the seal must be toward the
bearing. The seal should be pressed in so it is flush
with the end of the wheel hub.
2. Pack both bearings with grease. Install one bearing
into the bearing cup on inboard side of the wheel hub.
Lubricate the inside of a new seal and press it into the
wheel hub with the seal lip toward the bearing.
3. Fill wheel hub cavity between bearings approximate-
ly 50% full of grease. Position remaining bearing into the
outer bearing cup.
4. Slide the wheel hub assembly onto the spindle shaft
and secure it in place with the slotted hex nut. DO NOT
fully tighten the nut or install the cotter pin.
Groundsmaster 7200/7210
Operator's Manual for
TM
Page 6 – 17
5. While rotating the wheel hub by hand, torque the
slotted hex nut from 75 to 100 in–lb (8.5 to 11.3 N–m) to
set the bearings. Then, loosen the nut until the hub has
endplay.
6. While rotating the wheel hub by hand, torque the
slotted hex nut from 15 to 20 in–lb (1.7 to 2.3 N–m)
while aligning hex nut slot with shaft hole. After tighten-
ing, make sure that the wheel hub does not have any
free play.
7. Install cotter pin.
8. Install dust cap.
9. Install drive track and wheels to machine. (see Polar
Trac Wheels Installation in this section). Make sure
TM
that drive track is installed in the correct direction of rota-
tion.
10.Lower machine to ground.
11. Torque all removed lug nuts evenly in a crossing pat-
tern from 65 to 85 ft–lb (88 to 115 N–m).
8
4
5
7
6
4
Figure 17
1. Dust cap
2. Cotter pin
3. Slotted hex nut
4. Bearing cone
See text
for tightening
procedure
5
3
2
1
5. Bearing cup
6. Wheel hub
7. Wheel stud (5 used)
8. Seal
Chassis