Lull 944E-42 Service Manual - Manual (Page 76)

Axles, Drive Shafts, Wheels and Tires
5-4 944E-42
5.3.5 Axle Replacement
c. Axle Removal
The front and rear axle assemblies differ in that the front
axle assembly is equipped with a parking brake
mechanism and a limited-slip feature; the rear axle has
neither. 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 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. Properly disconnect the batteries.
5. If the axle will be disassembled after removal, place
a suitable receptacle under the axle drain plug (1).
Remove the drain plug 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.
6. Label, disconnect and cap the steering and brake
lines at the axle. Cap all fittings to prevent dirt &
debris from entering the hydraulic system. Wipe up
any spilled oil.
7. Block the front and rear of both tires on the axle that
is not being removed. Ensure that the machine will
remain in place during axle removal before
proceeding.
8. 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.
9. 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.
10. Remove both wheel and tire assemblies from the
axle that is being removed. (Refer to Section 5.5.1,
“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.
11. Remove the drive shaft assembly. Refer to Section
5.4.3, “Drive Shaft Removal.”
12. Remove the capscrew and locknut securing the
lower position cylinder-mount pin (2) to the cylinder.
Tap the cylinder mount pin out, and move the
cylinder to prevent it from interfering with axle
removal.
MU0581
1
MU6790
2
3
4