Snorkel S1930-snAP05168 - Manual (Page 36)

Chapter 9 – Operation
32 S1930 – 0361527
Figure 9.2 – Upper Controls
3. Enter the platform and secure the chain, or optional
swinging gate.
4. Pull the emergency stop button out.
5. The aerial platform may be driven and the platform
may be raised and lowered from the upper controls.
Driving
A
Danger
The aerial platform can tip over if it becomes un-
stable. Death or serious injury will result from a tip-
over accident. Do not drive an elevated aerial plat-
form on soft, uneven, or sloping surfaces. Do not
drive a fully stowed machine on grades that exceed
20 percent.
A fully stowed machine may be operated on grades up to
20 percent. A grade of 20 percent is a 24
″
(0.61 m) verti-
cal rise in 10
′
(3.05 m) horizontal length.
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.
Use the following procedure to operate the drive func-
tions.
1. Place the drive/lift selector switch (refer to Figure 9.2)
in the drive position.
2. Squeeze and hold the interlock switch against the
joystick.
• To move forward, slowly push the joystick forward.
• To move backward, slowly pull the joystick back-
ward.
Drive Speeds
The drive speed is proportional to the joystick position.
The farther the joystick is moved, the faster the travel
speed.
Drive speed ranges are interlocked through a limit switch
that senses scissors arm position. When the platform is
elevated below approximately seven feet, the aerial plat-
form may be driven within the full range of drive speeds.
Above 6
′
(1.8 m) of elevation, only the slowest drive speed
will work.
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 0.4
mph (0.6 km/h), which is 17
′
7
″
(5.3 m) in 30 seconds,
when elevated above 6
′
(1.8 m).
Drive/Lift Level Sensor Interlock
When the platform is elevated above 6
′
(1.8 m), lift and
drive functions are interlocked through a level sensor sys-
tem. If the chassis is tilted more than two degrees side-
to-side or more than four degrees front-to-rear, platform
raise and drive functions are disabled and an alarm sounds
when those controls are activated.
If the drive/lift level sensor interlock shuts off the platform
raise and drive functions, lower the platform and drive to a
level surface.
Platform raise and drive functions may also be disabled
by the pothole protection interlock.
Steering
The steer control switch is located on the joystick (refer
to Figure 9.2). Use the following procedure to steer the
aerial platform using the upper controls.
1. Squeeze and hold the interlock switch against the
joystick.
• To turn to the left, tap lightly on the left side of the
steer switch.
• To turn to the right, tap lightly on the right side of
the steer switch.
Steer Switch
Joystick
Emergency
Stop Button
Interlock Switch
Drive/Lift Selector Switch