Maintenance - Manitowoc Grove GRT9165 Service Manual

GRT9165 SERVICE MANUAL
Each axle incorporates a single reduction carrier with hypoid
gearing mounted in the axle center. The final reduction is of
planetary design spur gearing built into the wheel hubs.
The hypoid pinion and differential assembly of the first
reduction are supported by tapered roller bearings. The
pinion bearing preload is adjusted and maintained by a
hardened precision spacer between the inner and outer
bearing. The differential tapered bearing preload is adjusted
and maintained by the positioning of the threaded adjusting
rings in the carrier leg and cap bores.
In the planetary wheel ends, the spur teeth of the sun gear
mesh with teeth of the planet spur gears. The planet spur
gears rotate on planet pins which are mounted in a spider.
The planet spur gear teeth in turn mesh with teeth of the
floating ring gear.
Power is transmitted by the hypoid gear set in the differential
carrier to the axle shafts and the sun gear of the final
reduction, through the revolving planet gears, and into the
planetary spider which drives the wheel hub.
As an option, the front axle and rear axle may be provided
with a differential lock. When in the locked mode, the axle
shafts and the differential are locked together and there is no
differential action between the wheels.

Maintenance

NOTE: The axles do not have to be removed from the
crane to remove the planetary wheel ends or the
drive units.
Axle Removal
1. Using the outriggers, raise the wheels off of the ground.
2. Install supports under the frame at the outboard ends of
the outrigger boxes.
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.
3. Disconnect and remove the drive line from the
applicable axle. Do not disassemble the drive lines.
Refer to Drive Shafts, page 7-28.
4. Tag, disconnect, and cap the hydraulic brake line at
each wheel.
5. Tag, disconnect, and cap the hydraulic lines to the steer
cylinders.
GROVE
6. On the front axle only, tag and disconnect the hydraulic
line from the park brake actuator.
7. On the left side of the rear axle only, tag and disconnect
the electrical wires from the rear wheels not centered
switch.
NOTE:
8. Remove the wheels from the axle.
NOTE:
9. Position jacks, which are capable of handling the weight
of the axle, under the axle for support.
10. Remove the rear axles as follows:
a. Disconnect torque rods (4, Figure 8-3) from axle
(middle or rear).
b. Disconnect the drag link assembly (5) from the axle
(middle or rear).
c. Remove cotter pins (6), spacers (7), and lower
suspension pins (8) from the axle. Lower the rear
axle slowly.
11. Remove the front axle as follows:
a. Remove the washers (9) and capscrews (10)
securing the axle to the frame/cradle.
b. Lower the axle to the ground and move it to a clean
working area.
12. 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. For more information, see Steer
Cylinders, page 8-11.
b. The rear wheels not centered switch actuator
brackets (rear axles only). For more information,
see Rear Steer Sensor Adjustment Procedure, page
8-7.
c. The parking brake actuator (front axle only). Refer
to Brake System, page 8-13 in this section.
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.
Published 10-01-2020 Control # 699-00
UNDERCARRIAGE
Each tire and wheel
approximately 749 kg (1651 lb).
The front axle weighs approximately 2036 kg
(4489 lb). The middle axle weighs approximately
1 7 5 4 k g ( 3 8 6 7 l b ) . T h e r e a r a x l e w e i g h s
approximately 2000 kg (4409 lb).
assembly weighs
8
8-3