Removal; Installation; Wheel Bearings; Figure 3-17: Wheel Bearings - Upright SL20 Series Service & Parts Manual

3.15 W B
HEEL EARINGS
SL20
I
NSTALLATION
1. Referring to Figure 3-16, position the drive motor in the motor mount and secure with
capscrews and locknuts. Torque to 102 N-m (75 ft.lbs.).
2. Remove the plugs from the hose assemblies and connect to the drive motor.
3. Install the hub and slotted nut. Torque the locknut to 190-217 N-m (140 to 160 ft.
lbs.). Install a new cotter pin. Do not back-off the nut to install the cotter pin.
4. Install the wheel with lug bolts onto the hub. Torque to 108 N-m (80 ft. lbs.).
5. Remove blocks. Lower the jack and remove. Operate the drive system and check for
leaks.
6. Drive machine for 20 minutes and retorque wheel lug bolts and check for leaks.

Figure 3-17: Wheel Bearings

R
EMOVAL
1. Loosen the wheel lug
nuts. Using a 1.3 metric
ton (1.5 imperial ton)
capacity jack, raise the
work platform until the
wheel being repaired is
off the ground.
2. Install support blocks to
prevent the work plat-
form from falling if the
jack fails.
3. Remove the wheel lug
nuts and the wheel.
4. Remove the dust cap.
5. Remove the cotter pin.
6. Remove the hub nut and
washer.
7. Slide the entire hub assembly from the spindle and place on clean surface.
8. Remove the outside bearing cone and place on clean surface.
9. Remove the grease seal and the inside bearing cone. Examine the bearing cups. If
they are smooth, shiny and free of pits or any surface irregularities, DO NOT remove
them.
10. If the cups need replacement, remove them by tapping around the circumference of
the inside surface of the cups from the opposite side using a long drift.
I
NSTALLATION
1. Position the replacement bearing cup over the opening in the hub assembly then
position the worn cup over the replacement so that the bearing surfaces face each
other. Use the old bearing cone as a drift to work the replacement into position by
tapping evenly around the circumference.
2. Apply a liberal coating of multipurpose grease to the bearing surface of each cup.
Maintenance - 3.15 - Wheel Bearings
9
8
7
6
5
4
3
2
1
1. Wheel Bolt
2. Dust Cap
3. Hub nut
4. Cotter Pin
5. Wheel
14
12
11
10
13
6. Washer
7. Bearing Cone
8. Bearing Cup
9. Hub Assembly
10. Bearing Cup
11. Bearing Cone
12. Grease Seal
13. Spindle
14. Chassis
Page 3-15