3-14 SB80 Work Platform - European
M
AINTENANCE
Section
3.14
3.14 T
ORQUE
H
UBS
NOTE: Change oil in torque hubs after the first 50
hours of operation. Change every 2000 hours
thereafter.
1. Remove torque hub from drive assembly (refer to
“Torque Hub Removal” section).
2. Remove drain plug from underside of torque hub
and drain oil from unit.
3. Replace drain plug.
4. Remove fill plug from top side of torque hub.
5. Remove fill level plug from side of hub.
6. Fill unit with 90 wt. gear oil until oil comes out fill
level plug opening (1/2 full).
7. Replace fill level plug. Replace fill plug.
8. Replace torque hub.
Removal
1. Park the work platform on firm level ground and
block the wheels to prevent the work platform
from rolling.
2. Disconnect battery negative terminal.
3. Loosen the wheel lug nuts on the torque hub to
be removed.
4. Raise the rear of the work platform using a 2-ton
jack.
5. Position two 2-ton jack stands under the rear axle
to prevent the work platform from falling if the jack
fails.
6. Remove the wheel nuts and wheel.
7. Disconnect hydraulic brake line from brake.
8. Check for leaks and bleed air out of brake hydrau-
lic system using bleed valve located on brake
housing.
9. Remove 90° fitting from side of torque hub.
10. Mark and remove hoses from drive motor.
11. Remove mounting bolts from drive motor.
12. Separate drive motor from brake. Discard gasket.
13. Separate brake from torque hub. Discard gasket.
14. Remove 1/2-20 nuts and washers from torque
hub.
15. Remove torque hub.
Installation
NOTE: Torque all hardware to torques listed (see
Table 3-2, page 28) unless otherwise specified.
1. Install torque hub using 1/2-20 nuts and 1/2
washers.
2. Remove plug from 90° fitting and install fitting in
side of torque hub. Point fitting towards rear of
hub.
3. Using SAE 90W weight gear lube with EP addi-
tive, fill torque hub through top plug hole in rear
cover until oil comes out of 90° fitting in side. Plug
90° fitting and top of rear cover.
4. Install new gasket and brake.
5. Install new gasket and drive motor.
6. Secure assembly using washers and bolts.
7. Connect hydraulic brake lines.
8. Connect hoses to drive motor.
9. Install wheels. Torque lug nuts to 122 Nm (90ft.
lbs.).
10. Bleed brake lines if necessary.
11. Remove jack stands and lower rear end.
12. Connect battery terminal.
13. Check function of brake.
Disassembly of Torque Hub
1. Slide the coupling (1) from splines on input shaft
(2).
2. Position the assembly upright on face of spindle
(3).
3. Remove the disengage cover (31) if necessary.
4. Remove eight bolts (29) and the large cover (28)
from the unit. The thrust washer (25) and the dis-
engage plunger (26) usually remain attached to
the large cover (28) when it is removed. Remove
thrust washer (25), disengage plunger (26) and
“O” Ring (27) from the large cover (28).
CAUTION
!
!
Clean all fittings before disconnecting the hose
assemblies.
Plug and port holes and hoses IMMEDIATELY
to prevent contamination.
To Next Page
Loading...