Section 2 - Service and Repair
Torque Hubs
104045-021 - AB62 Work Platform - European Model
Page 2-13
2-7 T
ORQUE
H
UBS
NOTE:
Change fluid in the torque hubs after the first 50 hours of operation. Change every 1000 hours thereafter.
C
H A N G I N G
F
L U I D
NOTE:
It is not necessary to remove the torque hub to change fluid.
1. Park the work platform on a firm level, surface and block the wheels to prevent the work platform from
rolling.
2. Raise the axle using an eight-ton hydraulic jack. Place one eight ton-jack stand under each end of the
axle.
3. Loosen the wheel lug nuts.
4. Remove the wheel and rotate the torque hub so the drain plug on its side is at the bottom of the hub.
5. Remove the drain plugs at the bottom of the hub and front cover, and drain the oil from the unit.
6. Rotate the hub so that the plug opening in the front cover is slightly above the half full position, and the
side plug opening is at the top.
7. Fill the unit with 90 wt. gear oil until oil comes out of the front plug opening (the torque hub must be
½ full).
8. Replace the plugs.
9. Install the wheel and lower the machine to the surface.
T
O R Q U E
H
U B
R
E M O V A L
Figure 2-11:
Torque Hub Assembly, Remove and Replace
1. Park the work platform on a firm level, surface
and block the wheels to prevent the work plat-
form from rolling.
2. Disconnect the battery negative terminal.
3. Loosen the wheel lug nuts on the torque hub to
be removed.
4. Raise the axle of the work platform using an
eight-ton jack.
5. Position two eight-ton jack stands under the
axle.
6. Remove the wheel nuts and the wheel.
7. Disconnect the hydraulic brake line from the
brake.
C A U T I O N
!
!
Clean all fittings before disconnecting the hose
assemblies.
Plug all port holes and hose assemblies
IMMEDIATELY to prevent contamination from dust and debris.
8. Mark and remove the hoses from the drive motor.
9. Remove the mounting bolts from the drive motor.
10. Separate the drive motor from the brake. Discard the gasket.
11. Separate the brake from the torque hub. Discard the gasket.
12. Remove the ½-20 nuts and washers from the torque hub.
13. Remove the torque hub.
FRONT
REAR
1. Torque Hub (Planetary)
2. Gasket
3. Brake
4. Wheel Motor