JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-50 3121234
3.8 WHEEL DRIVE ASSEMBLY
Removal
NOTE: The drive motor 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 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 hardware securing wheel and remove wheel
assembly. Using suitable lifting device lift the wheel
assembly and place in a suitable area.
3. Through the access holes in the axle, tag and disconnect
the hydraulic lines running to the drive motor. Cap or
plug all openings to ensure no dirt enters the hydraulic
system.
NOTE: The drive hub and drive motor assembly weighs approxi-
mately 282 lbs. (128 kg).
4. Use a supporting device capable of handling the weight
of the drive hub and drive motor and unbolt the drive
hub from the frame. Remove the entire assembly from
the machine.
5. Remove the bolts and washers that secure the drive
motor to the drive hub and remove the drive motor.
Installation
1. Apply a coat of JLG Threadlocker P/N 0100011 on cap-
screws. Install the washers and capscrews to secure the
drive hub and drive motor, and torque to 70 ft. lbs.
(95 Nm).
2. Place the drive hub flange against the mounting flange
on the axle using a suitable lifting device and fasten it in
place with the capscrews and washers. Torque the cap-
screws to 190 ft. lbs. (258 Nm).
3. Using adequate support, install wheel into wheel
assembly and secure with bolts and nuts. Torque the
nuts to 300 ft. lbs. (407 Nm).
Figure 3-35. Drive Hub Installation
DRIVE HUB
O-RING
DRIVE MOTOR
CAPSCREW
CAPSCREW