JLG 600SC_660SJC Operator Manual - Manual (Page 57)

SECTION 4 - MACHINE OPERATION
3120897 – JLG Lift – 4-3
USE EXTREME CAUTION WHEN APPROACHING A CREST OF
ANY TERRAIN OBSTACLE. CHECK FOR CURBS, LARGE STONES,
OR OTHER TERRAIN OBSTACLES INCLUDING OVERHEAD
OBSTACLES AS THE MACHINE WILL MAKE UNCONTROLLED
PIVOTING MOTIONS WHEN THE CENTER OF GRAVITY (CENTER
OF TRACK FRAME) SHIFTS OVER AN EDGE. SLOW DOWN TO
MINIMIZE ACCELERATION DURING PIVOTING MOVEMENT.
BEFORE DRIVING, MAKE SURE THE BOOM IS POSITIONED OVER
T H E R E A R O F T H E C H A S S I S ( O V E R F I N A L D R I V E S A N D
SPROCKETS). IF THE BOOM IS OVER THE FRONT OF THE CHAS-
SIS (OVER THE IDLER WHEELS) STEER AND DRIVE CONTROLS
WILL MOVE IN OPPOSITE DIRECTIONS TO MACHINE CONTROLS.
Traveling Forward or Reverse
1. With engine running, depress footswitch and posi-
tion DRIVE control to FORWARD and hold for the
duration of forward travel desired.
2. Depress footswitch and position DRIVE control to
REVERSE and hold for duration of reverse travel
desired.
3. Depress footswitch, move joystick (DRIVE/STEER
CONTROL) to select desired direction of travel (for-
ward or reverse), move DRIVE/STEER control to
RIGHT for smooth turn to right and LEFT for smooth
turn to left.
4. To obtain sharp turns, move DRIVE SPEED/
TORQUE SELECT switch to the back position, slow
down the travel speed and move the DRIVE control
lever to RIGHT for a turn to the right and to LEFT for
a turn to the left. The sharpest possible turn is
achieved when the joystick is in the position to com-
mand one track to stop and the other to move
slowly.
TURN IN PLACE ONLY IN AN AREA FREE OF OBSTACLES AND
ONLY WITH THE BOOM FULLY RETRACTED. USE SLOW, GENTLE
CONTROL MOVEMENTS AND DO NOT OPERATE ANY OTHER
FUNCTIONS DURING COUNTERROTATION.
5. To obtain counterrotation (turn in place), stop the
machine, move the DRIVE/STEER control lever
Figure 4-1. Machine Motion Hazard