UNDERCARRIAGE RT540E SERVICE MANUAL
8-2 Published 4-20-2015, Control # 502-01
Maintenance
NOTE: The axles do not have to be removed from the
crane to remove the planetary wheel ends or the
drive units.
Removal
1. Using the outriggers, raise the wheels off the ground.
2. Install blocking under the frame at the outboard ends of
the four outrigger boxes.
3. Disconnect and remove the drive line from the
applicable axle. Do not disassemble the drive lines.
Refer to POWER TRAIN, page 7-1.
4. Tag, disconnect, and cap the hydraulic brake line at
each wheel.
5. Tag, disconnect, and cap the hydraulic lines to the steer
cylinders.
6. On the left side of the rear axle only, tag and disconnect
the electrical wires from the rear wheels not centered
switch.
NOTE: Each tire and wheel assembly weighs
approximately 1660 kg (3660 lb).
7. Remove the tire and wheel assemblies from the axle.
NOTE: Each axle weighs approximately 1053 kg (2321 lb)
with oil.
8. Position jacks, which are capable of handling the weight
of the axle, under the axle for support.
9. Remove the eight nuts, washers, and capscrews
securing the axle to the frame/cradle (Figure 8-1)
(Figure 8-2).
10. Lower the axle to the ground and remove it to a clean
working area.
11. If a new axle is to be installed, remove the following from
the old axle and install them on the new one.
a. The steer cylinders. Refer to Steer Cylinders in this
section.
b. The rear wheels not centered switch actuator
bracket (rear axle only).
CAUTION
Do not disassemble drive lines when removing them from
the crane. Dirt can enter the spline and cannot be purged.
In addition, the drive lines are assembled in a specific
orientation when manufactured and can easily be
incorrectly reassembled.
Reference Only
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