JLG 120-SXJ ANSI Operator Manual - Manual (Page 32)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3-2 – JLG Lift – 3121104
3.3 CONTROLS AND INDICATORS
Ground Controls
1. Power/Emergency Stop Switch
Pull out ON-OFF POWER/EMERGENCY STOP
SWITCH to turn on engine ignition and power to the
electrical system. Push in to shut off engine and
remove power from the controls. The Ground Con-
trol Emergency Stop Switch must be pulled out to
operate the machine from either Ground Control or
Platform Control. This allows the machine to be shut
down in emergency situations by those untrained in
the operation of the lift but who recognize the Emer-
gency Stop Switch.
2. Engine Start/ Auxiliary Power Switch
The Engine Start/Auxiliary Power switch is a momen-
tary contact switch. With the POWER/EMERGENCY
STOP switch in the on (pulled out) position and the
switch in the Engine Start position, electrical power
is supplied to the start solenoid.
To use auxiliary power, the switch must be held
“down” for duration of auxiliary pump use. This ener-
gizes the electrically operated auxiliary hydraulic
pump
NOTE: Auxiliary power will be disabled if the engine is run-
ning.
a. The auxiliary pump functions to provide suffi-
cient oil flow to operate the basic machine func-
tions should the main pump or engine fail. The
auxiliary pump enables the boom lift and tele-
scope and swing to be operated.
b. It should be noted that the functions will operate
at a slower than normal rate because of the
lower lpm of hydraulic fluid delivered.
NOTE: When operating on auxiliary power, do not operate
more than one function at a time. (Simultaneous
operation can overload the 12-volt auxiliary pump
motor.)
c. Position PLATFORM/GROUND switch to
GROUND.
d. Position POWER/EMERGENCY STOP switch to
ON.
e. Operate appropriate control switch or lever for
desired function and hold.
f. Position ENGINE START/AUXILIARY POWER
switch to DOWN and hold.
g. Release AUXILIARY POWER switch, allowed by
the selected control switch or lever.
h. Position the POWER/EMERGENCY STOP
SWITCH to off.
3. Control Station Selector
A three position, center off, key activated Platform/
Ground Select switch supplies power to the platform
control console when positioned to Platform. With
the switch in Ground position, power is shut off to
the platform control console, and only the controls
on the ground control panel are operable.
NOTE: With the Platform/Ground Select Switch in the center
position, power is shut off to controls at both operat-
ing stations.
NOTE: Main Lift, Swing, Platform Level, Main Telescope,
Platform Rotator and Auxiliary Power, control
switches are spring-loaded and will automatically
return to neutral (off) when released.
WHEN OPERATING THE BOOM ENSURE THERE ARE NO PER-
SONNEL AROUND OR UNDER PLATFORM.
TO AVOID SERIOUS INJURY, DO NOT OPERATE MACHINE IF ANY
CONTROL LEVERS OR TOGGLE SWITCHES CONTROLLING
PLATFORM MOVEMENT DO NOT RETURN TO THE OFF POSITION
WHEN RELEASED.
4. Main Lift Control.
The MAIN LIFT control switch provides raising and
lowering of the main boom when positioned to UP or
DOWN.
5. Main Telescope Control.
The MAIN TELESCOPE control switch provides
extension and retraction of the boom, when posi-
tioned to IN or OUT.
6. Swing Control.
The SWING control switch provides 360 degrees
continuous turntable rotation when positioned to
RIGHT or LEFT.