Boom Speed Knob; Platform Level Switch; Platform Rotation Switch; Engine/Emergency Power Switch - Snorkel TB66JRT Operator's Manual

Boom Speed Knob

The boom speed knob (refer to Figure 6.2) is used to
control the speed of the following boom functions:
Main boom raise/lower

Jib boom raise/lower

Boom extend/retract

Platform level up/down

Turntable rotation clockwise/counterclockwise

Set the knob to slow when beginning a movement. The
speed may be increased by slowly rotating the knob
toward fast. For smooth operation, rotate the knob to
slow when ending movement.

Platform Level Switch

The platform level switch (refer to Figure 6.2) 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 upward to tilt the platform floor up-

ward or away from the ground.
Hold the switch downward to tilt the platform floor

downward or toward the ground.

Platform Rotation Switch

The platform rotation switch (refer to Figure 6.2) 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 platform

counterclockwise.
Hold the switch to the left to rotate the platform

clockwise.

Engine/Emergency Power Switch

The engine/emergency power switch (refer to Figure 6.2)
is used to operate turntable, boom, and platform func-
tions using the emergency power system. The switch is
spring returned to the engine position for aerial platform
engine operation.
Caution
The emergency power system is for emergency
lowering and stowing only. The length of time the
pump can be operated depends on the capacity
of the battery. Do not use this system for normal
operation.
Hold the engine/emergency power switch downward

to activate the emergency 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.
TB66J – 0083740
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 6.2) is used to set the
engine throttle speed to either low or high idle.
Place the switch in the low position before starting

the engine.
Place the switch in the high position for machine

operation and for engine and/or hydraulic system
warm-up.
The engine has a two speed throttle operation from the
lower controls.
Place the throttle switch is in the low position to idle

the engine.
Place the switch in the high position to increase the

engine speed to mid-range.
Placing the ground controls switch in the on position

also increase the engine speed to mid-range

Fuel Switch

Engines on machines with the dual fuel option can be
operated using gasoline or liquefied petroleum gas
(LPG). Dual fuel machines have a gasoline tank and
an LPG tank behind the door on the right side of the
turntable.
The fuel switch may be used to select between gasoline
and LPG operation.
Place the switch downward to operate the engine

using gasoline.
Place the switch upward to operate the engine us-

ing LPG.

Hydraulic System Warm-up Switch

The optional hydraulic fluid warm-up switch is used to
warm the hydraulic fluid when the ambient temperature
is below 32°F (0°C) and boom movement is sluggish
because of cold fluid.
Caution
Not all hydraulic fluid is suitable to use in the hy-
draulic system. Some have poor lubricating char-
acteristics and may increase component wear. Only
use hydraulic fluid as recommended.
Use cold weather hydraulic oil as recommended in the
machine General Specifications in temperatures of 10°F
(-12°C) or below.
The toggle switches for the warm-up system are on
the lower control panel and on the front of the upper
control panel.
Chapter 6 – Controls
23