Snorkel AB60J CE - Manual (Page 44)

Chapter 8 – Operation
40 AB60J – 0182099EE
A
Warning
Death or serious injury can result from improperly
driving or steering the aerial platform. Read and
understand the information in this manual and on
the placards and decals on the machine before op-
erating the aerial platform on the job.
The blue and yellow arrows on the chassis indicate the
direction the chassis will move when the drive or steer
control is moved toward the corresponding color.
When the machine is in the stowed position, with the
booms centered between the rear wheels, the direction
of drive and steer control movement corresponds with
the direction of chassis movement.
When the turntable is rotated from the stowed position,
with the booms to either side of or in front of the chas-
sis, the direction of control movement does not corre-
spond with the direction of chassis movement.
To avoid confusion, always drive to the work area or
move between work areas with the turntable and booms
in the stowed position. After arriving at the work area,
the booms may be positioned to the side or the front of
the chassis for final positioning. Always look in the di-
rection of movement as indicated by the directional ar-
rows on the chassis.
Use the following procedure to operate the drive and
steer functions.
1. Determine the desired drive range for the specific
driving conditions.
• Use high range when traveling across firm, flat,
level surfaces. High range can only be activated
when the booms are stowed. High range is for
high speed, low torque operation.
• Use low range for driving on loading ramps or
other steep grades and when safety consider-
ations demand slow deliberate machine move-
ment. Low range is for low speed, high torque
operation.
2. Place the drive/boom selector switch in the drive
position.
3. Step down on the platform foot switch.
4. Push the drive joystick forward to move the chassis
forward, the direction of the blue arrow. Pull the joy-
stick backward to move the chassis backward, the
direction of the yellow arrow. The drive speed is pro-
portional to the joystick position.
5. To stop drive motion, return the joystick to neutral.
6. Push the drive joystick to the right to steer to the
right, the direction of the yellow arrow. Push the joy-
stick to the left to steer to the left, the direction of
the blue arrow.
Note
The steering wheels are not self-centering. Set the steer-
ing wheels straight ahead after completing a turn.
7. After driving to the desired location, release the foot
switch, or push the emergency stop button to apply
the parking brakes.
Drive Speeds
The drive speed is proportional to the joystick position.
The farther the joystick is moved, the faster the travel
speed.
Always slow down and shift the drive system to low range
before traveling over rough terrain or any sloped sur-
face.
Drive speed ranges are interlocked through a limit switch
that senses the main boom position. When the boom is
elevated, only the slowest drive speed will work regard-
less of the drive range switch position.
A
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury can result from such accidents. Do not alter,
disable, or override any safety device.
Do not use the aerial platform if it drives faster than 1.1
km/h (0.7 mile per hour) [9.7 m (32 feet) in 30 seconds]
when the booms are elevated from the stowed position.
Motion Warning Alarm
The motion warning alarm sounds loud intermittent
beeps when the drive joystick is in the forward or re-
verse position.
Platform Overload Sensing System
All functions are stopped from the upper and lower con-
trols, when the platform overload limit is exceeded. The
horn will sound intermittently and the red overload light
(refer to Figure 8.5) will blink until the excess load is
removed from the platform. At that time, the machine
functions are again operational.
Note
If the platform overload sensing system is tripped while
operating the machine, the emergency power system
may still be used for emergency machine operation from
either the lower or upper controls.