Snorkel AB85RJ - Manual (Page 27)

Chapter 6 – Controls
AB85RJ – 0421533 23
Jib Rotation/Boom Extend Joystick
The jib rotation/boom extend joystick is used to rotate
the jib and to extend or retract the booms. The joystick
is spring returned to the center off position.
Hold the joystick to the right to rotate the jib counterclock-
wise and to the left to rotate the jib clockwise.
Hold the joystick forward to retract the booms and back-
ward to extend the booms.
Drive Joystick
The drive joystick is used to control forward and reverse
motion of the aerial platform. It is also used to steer the
machine. The steering and drive functions may be oper-
ated simultaneously.
Note
The distance the joystick is moved is proportional to the
speed of the function.
Hold the joystick forward to move the aerial platform
forward and backward to move in reverse as indicated
by the directional arrows on the chassis.
Hold the joystick to the right to steer the aerial platform
to the right and to the left to steer to the left as indicated
by the directional arrows on the chassis. The wheels will
steer only when the drive joystick is in the forward or
reverse drive position, or when the booms are stowed.
Note
The steering wheels are not self-centering. Set the steer-
ing wheels straight ahead after completing a turn.
Drive Range Switch
The drive range switch has three positions to select drive
wheel operation when the booms are in the stowed posi-
tion; intermediate boom fully retracted and riser and main
booms fully lowered.
• HI – high speed two wheel drive (4.8 km/h [3 mph])
with booms in the stowed position.
• MID – high speed four wheel drive (2.4 km/h [1.5 mph])
with booms in the stowed position.
• LO – creep speed (1 km/h [0.6 mph]) with high torque
four wheel drive operation with booms in any position.
The drive range operates in LO when the booms are out
of the stowed position, regardless of the position of the
drive range switch.
This switch is similar to an automobile ignition switch. Turn
the switch to start until the engine starts, then release it
to on. If the engine dies, the switch must be turned to off
before it can be turned back to start.
An alarm sounds when the switch is turned on to warn
others that the machine engine is being started.
Note
On some machines it may be necessary to pause about
three seconds in the on position before going to start so
the starter can engage.
Turn the switch to off to turn the engine off and save fuel
if the platform is to stay in a particular position for a long
time.
Emergency Stop Button
The emergency stop is a two-position, red push button
on the top of the upper control panel (refer to Figure
6.4). Push the button in to disconnect power to all con-
trol circuits at the upper controls. Pull the button out to
restore power.
Note
The lower controls override the upper controls. If the up-
per control emergency stop button is engaged the lower
controls can still be used to operate the aerial platform.
Push the emergency stop button in when the upper
controls are not in use to protect against unintentional
operation.
Drive/Boom Selector Switch
Place the drive/boom selector switch down in the drive
position to drive the aerial platform.
Place the drive/boom selector switch up in the boom
position to operate the boom functions.
Note
Boom and drive functions can not be operated at the
same time.
Boom Joystick
The boom joystick is used to raise and lower the main
boom and to rotate the turntable. The boom and turntable
functions may be operated simultaneously. As the main
boom is raised, the tip boom is extended a maximum of
76.2 cm (30
″).
Note
The distance the joystick is moved is proportional to the
speed of the function.
Hold the joystick forward to raise the main boom and
backward to lower the boom.
Hold the joystick to the right to rotate the turntable
counterclockwise and to the left to rotate the turntable
clockwise.