Snorkel TB37 2001 - Manual (Page 40)

Driving and Steering
The aerial platform can tip over if it becomes unsta-
ble. Death or serious injury can result from a
tip-over accident. Do not drive an elevated aerial
platform on soft, uneven, or sloping surfaces. Do
not drive a fully stowed machine on grades that ex-
ceed 25 percent.
A fully stowed machine may be operated on grades up
to 25 percent. A grade of 25 percent is a 30
″
(7.62 m)
vertical rise in 10
′
(3.05 m) horizontal length.
Death or serious injury can result from improperly
driving or steering the aerial platform. Read and un-
derstand the information in this manual and on the
placards and decals on the machine before operat-
ing 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 direc-
tion 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 consider-
ations demand slow deliberate machine move-
ment. Low range is for low speed, high torque
operation.
2. Step down on the platform foot switch.
3. 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.
4. To stop drive motion, return the joystick to neutral.
5. Place the steer switch in the color-coded direction
necessary to turn left or right as indicated by the ar-
rows on the chassis.
Note
The steering wheels are not self-centering. Set the
steering wheels straight ahead after completing a turn.
6. 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.
TB37 – 0172094 page 8 - 3
Chapter 8. Operation
Emergency Stop Button
Machine/Generator Switch
Anti-Restart
Master Switch
Top Front
DANGER
DANGER
Figure 8.3—Upper Controls