JLG 120-SXJ ANSI Operator Manual - Manual (Page 39)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3121104 – JLG Lift – 3-9
NOTE: LIFT, SWING, and DRIVE control levers or switches
are spring-loaded and will automatically return to the
neutral (OFF) position when released.
TO AVOID SERIOUS INJURY, DO NOT OPERATE THE MACHINE IF
ANY CONTROL LEVERS OR TOGGLE SWITCHES CONTROLLING
THE PLATFORM MOVEMENT DO NOT RETURN TO THE OFF OR
NEUTRAL POSITION WHEN RELEASED.
6. Main Lift/Swing
For lift functions, the Main Lift/Swing control lever
provides raising and lowering of the boom when
positioned to UP or DOWN and automatically
returns to off when released.
For swing functions, the Main Lift/Swing control lever
provides 360 degrees continuous swing when posi-
tioned to left or right
7. Telescope
The TELE control switch provides extension and
retraction or the boom when positioned to the In or
Out positions, and automatically returns to off when
released.
8. Jack Steer Axles
When in the steering mode, positioning the Drive/
Steer/Axles controller right or left enables steering
the machine to the right or to the left. When in the
jack or axles mode, positioning the controller right or
left enables extending and retracting of the jacks or
axles.
To select the Jack or Axles mode, the switch must
be held in position. The switch is spring loaded to
return to the steering mode position.
9. Axle/Jack Select
The Axle/Jack Select switch is used to select
between the extension or retraction of the front or
rear axle or jack, depending upon the position of the
jack-steer-axle switch.
NOTE: When the boom is above horizontal, high speed
functions are automatically cut out and the machine
continues to operate at a lower speed.
10. Drive Speed/Torque Select
The Drive Speed/Torque Select switch is a three
position switch. The forward position gives maxi-
mum drive speed by shifting the drive motors to min-
imum displacement and giving high engine when
drive controller is moved. The back position gives
maximum torque for rough terrain and climbing
grades by shifting the wheel motors to maximum
displacement and giving high engine speed when
drive controller is moved. The center position allows
the machine to be driven as quietly as possible by
leaving the engine at mid speed and the drive
motors in maximum displacement.
11. Function Speed
The knob provides variable speed control of all
boom functions grouped together to the right of the
knob. For smoothest operation of these functions,
use two hands: rotate the knob counterclockwise to
the slowest position, select the function switch, and
while holding the switch on, rotate the knob to the
desired speed. To achieve a smooth stop, rotate the
knob ccw to a slow speed prior to letting go of the
function switch.
Rotating the knob fully counterclockwise until a click
is heard puts all controls, including drive, main lift,
and swing into “creep” speed. This slow speed is
used for fine positioning of the platform when close
to obstacles. A snail symbol is used to indicate
“creep” speed and is shown at the Function Speed
knob as well as near the proportional controllers to
act as a reminder.
12. Drive/Steer/Jacks/Axles
The Drive/Steer/Jacks/Axles controller is used to
control multiple functions.
The controller provides driving either forward or
backward when positioned to forward or reverse.
The controller is ramped to allow infinitely variable
driving speed between fast and slow.
In addition to drive, the controller is used to control
steering left or right, extension and retraction of the
jacks, or extension and retraction of the axles. The
function being operated is dependent upon the
position of the Jack/Steer/Axle Select switch.