JLG 534D-10 - Manual (Page 93)

5.9 534D-9, 534D-10 & 544D
Axles, Wheels and Tires
5.4 REAR DRIVE HUBS
5.4.1 Rear Drive Hub Service
Detailed drive hub service instructions (covering repair,
disassembly, reassembly and adjustment) are provided
in the MH439-0695 Auburn Power Wheel Service Manual
(JLG P/N 31200374).
Note: The removal, disassembly and installation of the
rear drive hub applies for either side.
a. Rear Drive Hub Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the travel select lever in the (N) NEUTRAL
position, engage the parking brake, straighten all
wheels and shut the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Remove the battery negative (-) cable from the
battery negative (-) terminal.
5. Block the front and rear of both tires on the front
axle.
6. Raise the machine using a suitable jack or hoist.
Place suitable supports under both sides of the
frame and lower the machine onto the supports.
Ensure that the machine will remain in place during
hub removal.
7. Mark and remove the wheel and tire assembly from
the hub that is being removed. Refer to Section
5.6.1, “Removing Wheel and Tire Assembly from
Machine.”
8. Remove the drain plug (1) and allow the wheel hub
oil to drain into the receptacle. Transfer the used axle
oil into a suitable covered container, and label the
container as “Used Oil.” Dispose of used oil at an
approved recycling facility.
9. Refer to Section 8.7.2, “Rear Drive Motors,” for drive
motor removal.
10. Support the drive hub using a suitable jack, hoist or
overhead crane and sling.
11. Remove the eight bolts holding the drive hub to the
steering knuckle.
Note: Mark the location of the two 12 point hub
mounting bolts.
12. Set the drive hub on a suitable support or table.
b. Rear Drive Hub Installation
1. Before proceeding, ensure that the machine will
remain in place during drive hub installation. Block
the front and rear of both tires on the front axle.
2. Using a suitable jack, hoist or overhead crane and
sling, balance the hub and prevent it from tipping,
turning or falling while positioning it at the steering
knuckle. Keep the hub supported and balanced on
the jack, hoist or overhead crane and sling
throughout the installation procedure.
3. Position the hub at the steering knuckle and align the
hub housing with the holes in the knuckle.
4. Install the eight bolts and torque to
280 lb-ft +/- 10 lb-ft (380 Nm +/- 13,5 Nm).
5. Refer to Section 8.7.2, “Rear Drive Motors,” for drive
motor installation.
6. Refer to Section 5.6.2, “Installing Wheel and Tire
Assembly onto Machine.”
7. Align the fill mark (2) on the hub and fill to the proper
level with Mobilfluid 424 ® (ISO 46).
8. Connect the battery negative (-) cable from the
battery negative (-) terminal.
9. Close and secure the engine cover.
10. Remove the blocks from the front and rear of both
tires on the front axle.
11. Start the machine and check proper operation.
Check for fluid leaks. Check the hydraulic fluid level
in the tank and add fluid as required.
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