Snorkel TB42, Руководство оператора

Страница: 28 / 68

Chapter 6 – Controls
24 TB42/TB50 – 0075251EE
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.
Place the switch in the low position for normal machine
operation and in high to drive at maximum speed.
The engine has a three speed throttle operation from the
upper controls. Independent of the throttle switch, the
platform foot switch, when depressed, increases the en-
gine speed from low to mid-range.
High engine speed is obtained when the main boom is
horizontal, the foot switch is depressed, the throttle switch
is in the high position, and the drive joystick is moved out
of neutral into the forward or reverse position.
The machine can be driven in mid-range engine speed
with the throttle switch place in the low position.
Horn Button
The horn button is on the right side of the upper control
panel. Press the button to sound the horn.
Platform Foot Switch
The upper controls are interlocked through the platform
foot switch (refer to Figure 6.6). Step down on and hold
the platform foot switch to activate the drive and boom
functions from the upper controls.
Figure 6.6 – Platform
Platform Foot
Switch
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.
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)