Snorkel SR3084SL - Manual (Page 40)

Chapter 8 – Operation
36 SR3084SL – 8210037
Driving and Steering
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Danger
The aerial platform can tip over if it becomes unstable.
Death or serious injury will result from a tip-over ac-
cident. Do not drive an elevated aerial platform on
soft, uneven, or sloping surfaces. Do not drive the
machine on grades that exceed 35 percent.
A fully stowed machine may be operated on grades up
to 35 percent. A grade of 35 percent is a 42 ″ (1.07 m)
vertical rise in 10 ′ (3.05 m) horizontal length.
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Warning
Death or serious injury could 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 operating
the aerial platform on the job.
Use the following procedure to operate the drive and
steer functions.
1. Determine the desired drive range for the spe-
cifi c driving conditions. Press the appropriate drive
speed button.
Select the high speed drive button when travel-
ing across fi rm, fl at, level surfaces. High range
can only be activated when the platform is fully
lowered.
Select the low speed drive button when driving on
loading ramps or other steep grades and when
safety considerations demand slow deliberate
machine movement.
2. Push the drive joystick forward to move the chas-
sis forward, the direction of the red 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.
3. To stop drive motion, return the joystick to neutral.
Note
To make an emergency stop push the emergency stop
inward button to apply the parking brakes.
4. The steer switch is a momentary contact, rocker
switch on top of the drive joystick. This switch controls
the two front wheels to steer the aerial platform.
To steer to the right, hold down the right side of
the steer switch.
To steer to the left, hold down the left side of the
steer switch.
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Note
The steering wheels are not self-centering. Set the steer-
ing wheels straight ahead after completing a turn.
5. After driving to the desired location, return the joystick
to neutral, or push the emergency stop button inward
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 switch the drive system to low
range before traveling over rough terrain or any sloped
surface.
Drive speed ranges are interlocked through limit switches
that sense the platform position.
When the platform is elevated, only the slowest
drive speed will work regardless of the drive speed
selected.
To avoid a sudden speed change from high to low,
always bring the machine to a stop before raising the
platform from the stowed position.
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Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. Do not alter,
disable, or override any safety device.
Do not use the aerial platform if it drives faster than
0.45 mph (0.8 km/h) when the platform is out of the
stowed position.
Lowering Alarm
The lowering alarm sounds loud intermittent beeps any-
time the aerial platform is lowered.
All Motion Alarm
The optional all motion alarm sounds loud intermittent
beeps anytime the machine functions are being oper-
ated.
Gradeability
Gradeability refers to the maximum slope that the aerial
platform is capable of travel. Gradeability can be de-
scribed as “theoretical” or “actual” with the slope, or grade,
measured in percent of slope or degree of slope.
Theoretical Gradeability
Theoretical machine gradeability refers to the maximum
slope that the machine is capable of travel under perfect,
or theoretical, conditions. It is based on mathematical
calculation, not practical application.
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