Snorkel TB42, Operator'S Manual

Page: 27 / 68

Chapter 6 – Controls
TB42/TB50 – 0075251EE 23
Note
On some machines it may be necessary to pause about
three seconds in the on position before going to start so
the starter can engage.
Turn the switch to off to turn the engine off and save fuel
if the platform is to stay in a particular position for a long
time.
Emergency Stop Button
The emergency stop is a two-position, red push button
on the top of the upper control panel (refer to Figure 6.5).
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.
Speed Knob
Use the boom speed control knob (refer to Figure 6.5) to
control the speed of the following boom functions.
• Boom extend/retract
• Platform rotate clockwise/counterclockwise
• 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.
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.
The circuit breakers protect the electrical wiring and com-
ponents from electrical overload in case of a short circuit
or other fault.
A
Caution
A tripped circuit breaker indicates a malfunction in
the electrical system. Component damage can re-
sult if the cause of the malfunction is not corrected.
Do not operate the aerial platform if the circuit
breaker trips repeatedly.
Push the button to reset the circuit breaker.
Upper Controls
The upper controls (refer to Figure 6.5) are located on the
control panel at the platform. Boom, platform, and drive
functions can be operated from the upper controls. The
following controls are located on the upper control panel.
• Start switch
• Emergency stop button
• Speed knob
• Drive/boom selector switch
• Boom joystick
• Drive joystick
• Drive range switch
• Platform level switch
• Boom extend/retract switch
• Engine/emergency power switch
• Throttle switch
• Platform rotate switch
Figure 6.5 – Upper Control Panel Top
Start Switch
The engine can be started from the platform using the
anti-restart master switch on the front of the upper con-
trol panel (refer to Figure 6.4).
This switch is similar to an automobile ignition switch.
Turn the switch to start until the engine starts, then re-
lease it to on. If the engine dies, the switch must be
turned to off before it can be turned back to start.
An alarm sounds when the switch is turned on to warn
others that the machine engine is being started.
Engine
Throttle
Platform
Level
Engine/Emergency
Power
Boom Extend/
Retract Switch
Drive Range
Speed
Knob
Emergency Stop
Boom Joystick
Platform Rotate
Drive/Boom
Selector
Drive Joystick