LeeBoy 6150 - Torque Hub; Two-Speed Hydraulic Motors

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LeeBoy 6150 Conveyor Paver 5-31
Maintenance
Torque Hub
If the torque hub has been damaged or worn, use the
following procedure for replacement:
1. Jack up the paver at least two feet (61 cm) off the
ground for enough clearance under the undercar-
riage and place on sturdy jack stands.
2. Disconnect and cap hydraulic hose connections to
the drive motor. (Figure 4-40)
3. Remove bolts holding torque hub to the wheel
mount and pry out torque hub with motor. (Figure
5-39)
4. Remove the two screws (and lock washers) that
attach the drive motor to the torque hub drive.
(Figure 5-40)
4 Bolts
8 Bolts
Figure 5-39. Torque Hub
5. Install new torque hub in proper position.
6. Place thread-locking adhesive on torque hub bolts
and torque bolts (see Torque Specications in
Section 2).
7. Check O-Ring on the drive motor and replace if
worn.
8. Place thread-locking adhesive on sprocket bolts
and torque bolts (see Torque Specications in
Section 2.)
9. Fill torque hub with oil. (Page 5-7)
10. Lower paver to ground.
11. Start paver and check for any leaks with engine
running.
DO NOT use your bare hands when
checking for hydraulic leaks as serious injury can
result from an oil leak under high pressure. Always
wear safety glasses and protective clothing.
Stop the engine immediately if any
hydraulic leak is noted. DO NOT start the engine
until the leak has been repaired.
Two-Speed Hydraulic Motors
1. Move paver onto a ramp where you can access the
undercarriage.
2. Remove the torque hub by following the procedures
described in the previous section.
3. Disconnect, label and plug ttings on hydraulic
hoses to the hydraulic motors. (Figure 5-40)
2-Speed Motor
Screws
Figure 5-40. Two-Speed Hydraulic Motors
4. Place blocks sufcient to support the hydraulic
motors underneath them.
5. Remove the two screws and lock washers attaching
the hydraulic motor to the torque hub and carefully
separate motor from the torque hub.
6. Remove the O-Ring and drain hydraulic oil from the
motor. Discard or repair the motor as appropriate.
7. Lubricate a new O-ring with hydraulic oil and install
onto the torque hub.
8. Reattach new or rebuilt hydraulic motor to torque
hub and torque screws to 120 ft. lbs. (163 N•
9. Reconnect hydraulic hoses.
10. Start the engine and let machine idle for 10 minutes
to work air out of the hydraulic system.
11. Check for any leaks.