Published 4-20-2015, Control # 502-01 8-5
RT540E SERVICE MANUAL UNDERCARRIAGE
Cleaning
Completely assembled axles may be steam cleaned on the
outside only, to facilitate initial removal and disassembly,
providing all openings are closed. Breathers, vented shift
units, and all other openings should be tightly covered or
closed to prevent the possibility of water entering the
assembly.
Installation
1. 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).
2. Position the axle under the crane on jacks which are
capable of handling the weight of the axle.
3. Raise the axle into place and secure with the eight
attaching capscrews, washers and nuts. Torque the
capscrews; see Fasteners and Torque Values, page 1-
11.
4. Install the wheels onto the axle. Refer to Wheels and
Tires, page 8-7.
5. Connect the hydraulic lines to the steer cylinder as
tagged during removal.
6. Connect the hydraulic brake line to each wheel as
marked during removal.
7. On the left side of the rear axle only, connect the
electrical wires to the rear wheels not centered switch.
Refer to Rear Steer Indicator Adjustment Procedure,
page 8-5 and adjust the switch.
8. Connect the drive line to the applicable axle. Refer to
Drive Lines, page 7-21.
9. Refer to Brake System in this section and bleed the
hydraulic brake system.
10. Remove the blocking under the outrigger beams and
retract the outriggers to lower the wheels to the ground.
Wheel Alignment Check Procedure
1. Check the axle for wheel alignment. The wheels are to
be straight ahead with no toe-in or toe-out. Adjust if
necessary by turning the tie rod ends in the direction
necessary.
2. Turn the wheels to the extreme left. Check the clearance
between the inside of the tire and the nearest object. If
the clearance is less than 25 mm (1.0 in) on the rear
axle or 13 mm (0.5 in) on the front axle, adjust the axle
stop to provide clearance. Do not adjust axle stop if
clearance is greater than 25 mm (1.0 in).
Check the steer cylinders to see that they are not
bottomed out. To check the steer cylinders, remove the
pin at the rod end and apply pressure to move the
cylinder rod. The cylinder rod should travel a minimum of
3.0 mm (0.12 in).
3. Turn the wheels to the extreme right and repeat step 2
for the right side.
Rear Steer Indicator Adjustment Procedure
1. Ensure the wheels are straight ahead.
NOTE: Refer to Figure 8-3 to perform the following
adjustments.
2. Ensure proximity sensor switch is centered in the slot of
the sensor plate bolted to the top of the axle trunnion
cap. Adjust by moving the sensor mounting bracket.
3. Ensure a maximum gap of 5 mm (0.2 in) exists between
the sensor switch and the sensor plate. Adjust by
loosening switch mounting bolts and moving switch up
or down on the mounting bracket. Tighten the mounting
bolts.
4. Turn the rear wheels to verify proper operation. The
Rear Wheels Not Centered indicator in cab should not
be illuminated when rear wheels are centered and the
sensor switch is centered in the slot of the sensor plate.
Reference Only
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