JLG 680S, Service And Maintenance Manual

Page: 63 / 530

SECTION 3 - CHASSIS & TURNTABLE
3121234 3-11
3.5 WHEEL DRIVE ASSEMBLY, 2WD
Removal
NOTE: The drive motor and/or drive brake can be removed
through the axle flange as part of the wheel drive assembly
or they can be removed separately through the bottom of
the frame while leaving the drive hub bolted to the axle.
1. Use a jack to lift the frame enough so the tire and wheel
assembly is off of the ground. Place blocking strong
enough to support the weight of the machine under the
frame and remove the jack.
NOTE: The pneumatic tire & wheel assembly weighs approxi-
mately 269 lbs. (122 kg). The foam-filled tire & wheel
assembly weighs approximately 544 lbs. (247.25 kg).
2. Remove the tire and wheel assembly.
3. Through the access holes in the axle, tag and disconnect
the hydraulic lines running to the drive motor and drive
brake. Cap or plug all openings to ensure no dirt enters
the hydraulic system.
NOTE: The drive hub, drive brake, and drive motor assembly
weighs approximately 275 lbs. (125 kg).
4. Use a supporting device capable of handling the weight
of the drive hub, drive brake, and drive motor and
unbolt the drive hub from the frame. Remove the entire
assembly from the machine.
5. Remove the nuts and washers that secure the drive
motor to the drive hub and drive brake and remove the
drive motor. Remove and discard the o-ring between
the drive motor and drive brake.
6. Remove the drive brake from the drive hub. Remove and
discard the o-ring between the drive brake and drive
hub.
7. If necessary, remove the studs from the drive hub.
Figure 3-8. Drive Hub Installation - 2WD
DRIVE HUB
O-RING
DRIVE BRAKE
DRIVE MOTOR