Drive Range Switch; Boom Joystick; Boom Extension Switch; Jib Articulation Switch - Snorkel TB66JRT Operator's Manual

Chapter 6 – Controls
Note
The distance the joystick is moved is proportional to the
speed of the function.
To move the aerial platform forward, hold the joystick

forward as indicated by the directional arrows on
the chassis.
To move the aerial platform backward, hold the

joystick backward as indicated by the directional
arrows on the chassis.
To steer to the right, hold the joystick to the right as

indicated by the directional arrows on the chassis.
To steer to the left, hold the joystick 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 6.6) has two
positions to select drive wheel operation:
• High range – high speed and low torque operation.
• Low range – low speed and high torque operation.

Boom Joystick

The boom joystick (refer to Figure 6.6) is used to raise
and lower the main boom and to rotate the turntable.
The boom and turntable 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

counterclockwise and to the left to rotate the turn-
table clockwise.

Boom Extension Switch

The boom extension switch (refer to Figure 6.6) is used
to extend or retract the tip and intermediate booms. The
switch is spring returned to the center off position.
Hold the switch backward to extend the booms.

Hold the switch forward to retract the booms.

26

Jib Articulation Switch

The jib switch (refer to Figure 6.6) is used to raise or
lower the jib. The switch is spring returned to the center
off position.
Hold the switch forward to raise the jib.

Hold the switch backward to lower the jib.


Platform Level Switch

The platform level switch (refer to Figure 6.6) 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 forward to tilt the platform floor up-

ward or away from the ground.
Hold the switch backward to tilt the platform floor

downward or toward the ground.

Platform Rotation Switch

The platform rotation switch (refer to Figure 6.6) 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

clockwise.
Hold the switch to the right to rotate the platform

counterclockwise.

Boom Speed Knob

Use the boom speed control knob (refer to Figure 6.6)
to control the speed of the following boom functions.
• Jib boom raise/lower
• Boom extend/retract
• Platform level up/down
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.

Throttle Switch

The throttle switch (refer to Figure 6.6) is used to set the
engine throttle speed to either low or high idle.
Place the switch in the low position for normal ma-

chine operation.
Place the switch in the high position to drive at

maximum speed.
The engine may have two or three speed throttle op-
eration.
On machines with a two speed throttle:
With the throttle switch in the low position, the engine

will operate at low speed only. Operation will be
TB66J – 0083740