Manitowoc Grove GRT9165, Service Manual

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UNDERCARRIAGE GRT9165 SERVICE MANUAL
8-8 Published 10-01-2020 Control # 699-00
Maintenance
Mounting Wheel Assemblies
NOTE: Do not lubricate the wheel studs or lug nuts.
1. Raise the crane on outriggers so the wheels are off the
ground.
NOTE: Prior to wheel installation remove any dirt or grease
from wheel mounting surfaces.
2. Position the wheel assembly on the wheel end pilot.
Install the lug nuts and tighten them to 70 N-m (50 lb-ft)
in the sequence shown in Figure 8-7.
3. Ensure the wheel assembly is positioned properly on the
hub.
4. Continue to torque the lug nuts 610 N-m to 680 N-m
(450 lb-ft to 500 lb-ft) in the sequence shown in
Figure 8-7.
5. Lower the crane onto its tires. Retract and stow the
outrigger assemblies and the floats.
6. Retorque lug nuts after approximately one hour of travel.
STEERING SYSTEMS
Description
To maximize maneuverability, the crane can be steered by
the front axle, the rear axles, or by the front and rear axles
simultaneously. The crane features two separate steering
systems: one to control front axle steering and one for rear
axle steering. The front steer reversal feature enables the
front axle steering in standard or alternate driving modes.
For more information about front axle driving modes, see the
Operator Manual . Standard and alternate driving modes are
also supported when rear steering is used. For more
information about rear steering, see the
Operator Manual .
Front Steering System
The front steering system consists of a load sense steer
priority flow valve (part of the accessory manifold valve), load
sense steering control valve, single axle reversal valve (part
of the Main Carrier Manifold), and two steer cylinders. Refer
to
Front Steering Control Valve , page 8-9 and Accessory
Manifold Valve , page 2-39 for a description of the front steer
hydraulic components, their functions, and maintenance
information.
Rear Steering System
Refer to Carrier Manifold Valve , page 2-25 for a description
of the rear steer hydraulic components, their functions, and
maintenance information. A rear steer indicator system is
provided to indicate when the rear wheels are not centered.
This system consists of an indicator light located on the ODM
in the cab and a proximity switch located on the right side of
the rear axle. When the rear wheels are turned to the left or
right, the amber indicator will illuminate. For more
information, see
Rear Steer Sensor Adjustment Procedure ,
page 8-7.
DANGER
Do not attempt to demount or mount tires without proper
training. The high pressures involved can cause tire and
rim parts and tools to fly with explosive force, if proper
procedures are not used, causing severe injury or death
to personnel and damage to the crane and surrounding
area.
FIGURE 8-7
10227