Snorkel TB66J CE - Manual (Page 46)

Chapter 8 – Operation
42 TB60/66J – 0084030EE
• more turning space is required to prevent the
platform from colliding with obstacles several feet
beyond the path of the tires.
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 chassis,
the direction of control movement does not correspond
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
direction of movement as indicated by the directional
arrows 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 considerations
demand slow deliberate machine movement. 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 chas-
sis forward, the direction of the blue arrow. Pull the
joystick backward to move the chassis backward,
the direction of the yellow arrow. The drive speed
is proportional 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
joystick 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
surface.
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 TB60 aerial platform if it drives faster
than 0.8 km/h (0.5 miles per hour) [6.7 m (22 feet) in
30 seconds] when the booms are elevated from the
stowed position.
Do not use the TB66J aerial platform if it drives faster
than 0.96 km/h (0.6 miles per hour) [7.9 m (26 feet) in
30 seconds] when the booms are elevated from the
stowed position.
Motion Warning Alarm
The optional motion warning alarm sounds loud intermit-
tent beeps when the drive joystick is in the forward or
reverse position.
Platform Overload Sensing System
All functions are stopped from the upper and lower
controls, 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.