FUNCTION AND STRUCTURE OF JOYSTICK STEERING SYSTEM
Joystick steering system is a
device to perform steering of
wheel loader by lever operation of joystick instead of steering
wheel. With joystick, steering operation can be performed by
light effort and small stroke which reduces steering operation.
Push the joystick activation switch, then steering operation with
joystick becomes effective.
The joystick pilot lamp on the left arm-rest lights up as long as
the joystick steering is selected.
On machines equipped with joystick steering system, you can
select of steering operation and transmission operation with the
joystick switch as shown below.
There are differences in function between the joystick steering lever operation and steering wheel operation.
Selection Joystick steering lever operation Steering wheel operation
Joystick activation switch Lights up Do not light
Steering Both of joystick steering lever opera-
tion and steering wheel operation are
enabled. If both are operated simulta-
neously
, steering wheel operation is
given priority
.
Only steering wheel operation is ena-
bled
T
ransmission
Directional selec-
tion
Joystick directional selector switch
operation is enabled
T
ransmission directional lever opera-
tion is enabled
Travel speed con-
trol function
• When joystick ON/OFF switch
is turned ON, maximum speed
on a level ground is limited ap-
proximately to
18 km/h auto-
matically.
• The machine may not travel at
4th speed.
None
PRECAUTIONS FOR HANDLING JOYSTICK STEERING SYSTEM
WARNING
• The joystick console must be at lower rear position during operation even when joystick steering is
not used. At this time, be sure to set the joystick ON/OFF switch to OFF position.
• Never use joystick steering when traveling on public road.
• Use steering wheel when the travel speed is 20 km/h or higher
, or when traveling on public road.
When operating the machine by using the steering wheel, set the joystick ON/OFF switch to OFF
position.
• When driving the machine by using joystick steering lever and when operating the transmission,
the machine may not go along with the operation. At that time, operate the steering wheel to move
the machine to a safe place and stop the machine, then turn the joystick ON/OFF switch to OFF po-
sition.
Then ask your Komatsu distributor for repair.
• Never get on and operate the machine which is not repaired completely.
• The steering wheel operation is always prior to the joystick steering.
• When turning the machine, if
you operate the steering wheel, the machine stops articulation at the position
where you stop turning the steering wheel. However, if you tilt the joystick and hold it at the position, the
machine articulates to the end, so be careful.
HANDLE JOYSTICK STEERING SYSTEM ATTACHMENTS AND OPTIONS
6-8
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