JLG 450AJ Operator Manual - Manual (Page 35)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3120868 – JLG Lift – 3-5
3.4 CONTROLS AND INDICATORS
NOTE: This machines is equipped with control panels that
use symbols to indicate control functions. Refer to
Figure 3-7. and Figure 3-8. for the symbols on the
decal located on the control box guard in front of the
control box or by the ground controls for these con-
trol panel symbols and the corresponding functions.
Ground Controls
P E R F O R M P R E- O P E R AT I O N A L C H E C K S A N D
INSPECTIONS FROM THE GROUND CONTROL STA-
TION. WHEN PERSONNEL ARE IN THE PLATFORM,
OPERATION OF THE BOOM WILL ONLY BE PER-
FORMED WITH THE PERMISSION OF THE PLATFORM
OCCUPANT(S).
NOTE: When Power/Emergency Stop switch is in the on
position and engine is not running, an alarm will
sound, indicating Ignition is on.
WHEN THE MACHINE IS SHUT DOWN THE MASTER/EMERGENCY
STOP SWITCH MUST BE POSITIONED TO THE OFF POSITION TO
PREVENT DRAINING THE BATTERY.
1. Power/Emergency Stop Switch.
Pull out on-off Power/Emergency Stop Switch to turn
on engine ignition and power to the electrical sys-
tem. Push in to shut off engine and remove power
from the controls. The Ground Control 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. The keyed Master Switch can
also be used for the same purpose.
2. Engine Start/ Auxiliary Power Switch.
A toggle-type Engine Start/Auxiliary Power control
switch, on the ground control panel, energizes the
engine starter or the electrically operated auxiliary
hydraulic pump, when actuated. To start the engine,
the switch must be held up until the engine starts. To
use auxiliary power, the switch must be held down
for duration of auxiliary pump use.
NOTE: Auxiliary power only works if there is no oil pressure,
and is disabled if engine is running.
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 tower boom lift and
telescope 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 flow 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, followed 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 PLAT-
FORM/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. Remove the key to prevent the controls
from being actuated.
NOTE: Engine Start/Auxiliary Power, Main Lift, Swing, Plat-
form Level, Main Telescope, Tower Lift and Platform
Rotator 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.