JLG 534D-10 - Manual (Page 88)

Axles, Wheels and Tires
5.4 534D-9, 534D-10 & 544D
5.3.5 Axle Removal
The front axle assembly is equipped with a parking brake
mechanism and a limited-slip feature. The following steps
outline a typical axle removal procedure.
Cleanliness is extremely important. Before attempting to
remove the axle, thoroughly clean the machine. Avoid
spraying water or cleaning solution on the stabilizer
solenoids and other electrical components. If using a
steam cleaner, seal all openings before steam cleaning.
Note: Clear the work area of all debris, unnecessary
personnel, etc. Allow sufficient space to raise the
machine and to remove the axle.
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, raise the boom to
access the front axle, 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 deck cover and disconnect the battery
negative (-) cable from the battery negative (-)
terminal.
5. If the axle will be disassembled after removal, place
a suitable receptacle under the axle (1) and wheel
hubs (2) drain plugs.
6. Use the breather (3) to relieve any pressure in the
axle before removing the drain plug.
7. Remove the drain plugs and allow the axle 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.
8. Label, disconnect and cap the brake lines at the
axle. Cap all fittings and openings to prevent dirt &
debris from entering the hydraulic system.
9. Block the front and rear of both tires on the rear axle.
Ensure that the machine will remain in place during
axle removal before proceeding.
10. 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
axle removal.
11. Support the axle that is being removed with a suitable
jack, hoist or overhead crane and sling. DO NOT
raise the axle or the machine.
12. Mark and remove both wheel and tire assemblies
from the axle that is being removed. (Refer to
Section 5.6.1, “Removing Wheel and Tire Assembly
from Machine.”)
Note: The wheel and tire assemblies must be re-installed
later with the directional tread pattern “arrows” facing in
the direction of forward travel.
13. Remove the four bolts holding the drive motor assembly
to the carrier assembly. Pull the drive motor back from
the carrier assembly and support.
14. On the front axle remove the retaining ring securing
the sway cylinder pin to the frame. Tap the pin out,
and move the cylinder to prevent it from interfering
with axle removal.
15. Remove the bolts and locknut securing the axle pivot
pin to the frame. Tap the pivot pin out and note the
location of the shims on each side of the axle.
16. Remove the axle from the machine using the jack,
hoist or overhead crane and sling supporting the
axle. DO NOT raise or otherwise disturb the machine
while removing the axle. Balance the axle and
prevent it from tipping, turning or falling while
removing it from beneath the machine. Place the
axle on a suitable support or holding stand.
MX0590
3
1
MX0570
2