JLG G5-18A Service Manual - Manual (Page 64)

Axles, Drive Shafts, Wheels and Tires
5-4 G5-18A, 2505H, 25.5
5.4.5 Axle Removal
The front and rear axle assemblies differ in that the front
axle assembly is equipped with a drop box, hydraulic
drive pump, parking brake mechanism and a limited-slip
feature; the rear axle has none of these. The following
steps outline a typical axle removal procedure, suitable
for either the front or the rear axle assembly.
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 machine on a hard, level surface.
2. Fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL.
3. Engage park brake and shut engine OFF.
4. Place a Do Not Operate Tag on both ignition key
switch and steering wheel.
5. Properly disconnect battery.
6. Open engine cover. Allow system fluids to cool.
7. If the axle will be disassembled after removal, the oil
will have to be drained. Loosen the breather to
release possible internal pressure, then tighten
breather with a torque wrench to 9 lb-ft (12 Nm).
8. If axle will be disassembled after removal, place a
suitable receptacle under axle (1), drop box (2) and
wheel hubs (3) drain plugs (4). Remove drain plugs
and allow axle oil to drain into receptacle. Transfer
used axle oil into a suitable covered container, and
label container as "Used Oil." Dispose of used oil at
an approved recycling facility.
9. Label, disconnect and cap steering and brake lines
at axle. Wipe up any spilled oil.
10. Block front and rear of both tires on axle that is not
being removed. Ensure that machine will remain in
place during axle removal before proceeding.
11. Raise machine using a suitable jack or hoist. Place
suitable supports under both sides of frame and
lower machine onto supports. Ensure that machine
will remain in place during axle removal.
12. Support axle that is being removed with a suitable
jack, hoist or overhead crane and sling. DO NOT
raise axle or machine.
13. 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.
14. Remove drive shaft assembly. (Refer to Section 5.5.3,
“Drive Shaft Removal.”)
15. Remove capscrews, locknuts and axle plates
securing axle to frame.
16. Remove axle from machine using jack, hoist or
overhead crane and sling supporting axle. DO NOT
raise or otherwise disturb machine while removing
axle. Balance axle and prevent it from tipping,
turning or falling while removing it from beneath
machine. Place the axle on a suitable support or
holding stand.
WARNING
An improperly supported machine can fall, causing
death or severe personal injury. Safely raise and
adequately support the machine so that it will remain
stable and in place before attempting to remove an axle.
MY2091
4
5
1
MY8890
2
4 4
3
5