Snorkel TB85J - Manual (Page 33)

Chapter 6 – Controls
TB80/TB85J – 0112477 29
Jib Articulation Switch – TB85J Only
The jib switch is used to raise or lower the jib. The switch
is spring returned to the center off position.
Hold the switch up to raise the jib. Hold the switch down
to lower the jib.
Platform Level Switch
The level switch 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 down to tilt the
platform floor downward or toward the ground.
Platform Rotate Switch
The platform rotate switch 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 turntable coun-
terclockwise. Hold the switch to the left to rotate the turn-
table clockwise.
Boom Extend/Retract Joystick
The boom extend/retract joystick is used to extend or
retract the booms. The joystick is spring returned to the
center off position.
Hold the joystick forward to retract the booms and back-
ward to extend the booms.
Engine/Emergency Power Switch
The engine/emergency power switch is spring returned
to the engine position for aerial platform engine opera-
tion.
Hold the switch in the emergency power position to oper-
ate aerial platform functions using the emergency power
system.
Note
The emergency power system is for lowering the platform
during an emergency and is not intended for normal ma-
chine operation.
If the engine is running, it will stop when the switch is
placed in the emergency power position.
Throttle Switch
The throttle switch is used to set the engine throttle speed
to either low or high idle.
Place the switch in the low position for normal machine
operation and in high to drive at maximum speed.
Cummins engines have a three speed throttle operation
from the upper controls. Independent of the throttle switch,
the platform foot switch, when depressed, increases the
engine speed from low to mid-range.
Emergency Stop Button
The emergency stop is a two-position, red push button
on the top of the upper control panel (refer to Figure 6.6).
Push the button in to disconnect power to all control cir-
cuits 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 con-
trols are not in use to protect against unintentional op-
eration.
Boom Joystick
The boom joystick is used to raise and lower the main
boom and to rotate the turntable. The boom and turn-
table functions may be operated simultaneously.
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 coun-
terclockwise and to the left to rotate the turntable clock-
wise.
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 for-
ward 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.
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 two positions to select drive
wheel operation:
• HI – high speed and low torque operation.
• LO – low speed and high torque operation.