Snorkel TB47J CE - Manual (Page 26)

Chapter 6 – Controls
22 TB47J – 0075239EE
Set the knob to slow when beginning a boom movement.
The speed may be increased by slowly rotating the knob
toward fast. For smooth operation, rotate the knob to
slow when ending boom movement.
Drive/Boom Selector Switch
Place the drive/boom selector switch (refer to Figure 6.5)
in the drive position to drive the aerial platform.
Place the drive/boom selector switch in the boom posi-
tion to operate the boom functions.
Note
Boom and drive functions can not be operated at the
same time.
Boom Joystick
The boom joystick (refer to Figure 6.5) is used to raise
and lower the main boom and to rotate the turntable. The
boom and turntable functions may be operated simulta-
neously.
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 (refer to Figure 6.5) 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 operated 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 (refer to Figure 6.5) has two posi-
tions to select drive wheel operation:
• HI – high speed and low torque operation.
• LO – low speed and high torque operation.
Jib Articulation Switch
The jib 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 up to raise the jib. Hold the switch down
to lower the jib.
Note
The jib and platform rotate functions can not be oper-
ated at the same time. The platform rotate function will
override the jib function.
Boom Extend/Retract Switch
The boom extend/retract switch (refer to Figure 6.5) is
used to extend or retract the tip and intermediate booms.
The switch is spring returned to the center off position.
Hold the switch down to extend the booms. Hold the
switch up to retract the booms.
Platform Rotate Switch
The platform rotate 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 left to rotate the platform clock-
wise. Hold the switch to the right to rotate the platform
counterclockwise.
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 down to tilt the
platform floor downward or toward the ground.
Engine/Emergency Power Switch
The engine/emergency power switch (refer to Figure 6.5)
is spring returned to the engine position for aerial plat-
form engine operation.
Place the switch in the emergency power position and
hold to operate aerial platform functions using the emer-
gency power system. Release the switch to disengage
the emergency power system.
Note
The emergency power system is for lowering the plat-
form during an emergency and is not intended for normal
machine operation.
If the engine is running, it will stop when the switch is
placed in the emergency power position.
Throttle Switch
The throttle switch (refer to Figure 6.5) is used to set the
engine throttle speed to either low or high idle.