Chapter 6 – Controls
24 A46JRT – 0260996
Boom Speed Knob
Use the boom speed control knob (refer to Figure 6.5) to
control the speed of the following boom functions:
• Main boom raise/lower
• Main boom extend/retract
• Turntable rotation clockwise/counterclockwise
Set the knob to slow (turtle) when beginning a boom
movement. The speed may be increased by slowly rotat-
ing the knob toward fast (rabbit). For smooth operation,
rotate the knob to slow when ending boom movement.
Rotation Switch
The rotation switch (refer to Figure 6.5) is used to rotate
the turntable in a clockwise or counterclockwise direction.
The switch is spring returned to the center off position.
• Hold the switch to the right to rotate the turntable
counterclockwise.
• Hold the switch to the left to rotate the turntable
clockwise.
Riser Switch
The riser switch (refer to Figure 6.5) is used to raise or
lower the riser booms. The switch is spring returned to
the center off position.
• Hold the switch upward to raise the riser booms.
•
Hold the switch downward to lower the riser booms.
Boom Elevation Switch
The boom elevation switch (refer to Figure 6.5) is used
to raise or lower the main boom. The switch is spring
returned to the center off position.
• Hold the switch upward to raise the main boom.
• Hold the switch downward to lower the main boom.
Boom Extension Switch
The boom extension switch (refer to Figure 6.5) is used to
extend or retract the booms. The switch is spring returned
to the center off position.
• Hold the switch downward to extend the booms.
• Hold the switch upward to retract the booms.
Jib Articulation Switch
The jib articulation switch (refer to Figure 6.5) is used to
raise or lower the jib. The switch is spring returned to the
center off position.
• Hold the switch upward to raise the jib.
• Hold the switch downward to lower the jib.
Platform Level Switch
The platform level switch (refer to Figure 6.5) is used to
level the platform floor with respect to the ground. The
switch is spring returned to the center off position.
• Hold the switch up to tilt the platform floor upward or
away from the ground.
• Hold the switch downward to tilt the platform floor
downward or toward the ground.
Platform Rotation Switch
The platform rotation switch (refer to Figure 6.5) is used
to rotate the platform relative to the end of the tip boom.
The switch is spring returned to the center off position.
• Hold the switch to the right to rotate the platform
counterclockwise.
• Hold the switch to the left to rotate the platform clock-
wise.
Engine/Emergency Power Switch
The engine/emergency power switch (refer to Figure 6.5)
is used to operate turntable, boom, and platform functions
using the emergency power system. The switch is spring
returned to the engine position for aerial platform engine
operation.
Caution
The emergency power system is for emergency
lowering and stowing only. The length of time the
pump can be operated depends on the capacity of the
battery. Do not use this system for normal operation.
• Hold the engine/emergency power switch downward
in the direction of the white arrow to activate the
emergency power system.
•
Release the switch to
disengage the emergency power
system.
If the engine is running, it will stop when the switch is
placed in the emergency power position.
Horn Switch
The horn switch is to the right of the emergency stop
button on the upper control panel (refer to Figure 6.5).
Hold the switch upward to sound the horn.
Platform Overload Warning Light
When the platform overload limit is exceeded, the horn will
sound intermittently and the platform overload light (refer
to Figure 6.5) will blink until the excess load is removed
from the platform.
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