JLG X390AJ Operator Manual - Manual (Page 51)

SECTION 4 - MACHINE OPERATION
3128792 – JLG Lift – 4-7
4.5 TRACKS - DRIVING, STEERING AND TRACK
WIDTH ADJUST
KEEP EVERYONE A DISTANCE OF AT LEAST 3 FT. (1 M) FROM THE
MACHINE WHEN OPERATING THE TRACKS.
NOTE: The base and boom/jib must be aligned and retracted
before this function will operate, see Section 4.4,
BASE AND BOOM/JIB ALIGNMENT.
Travelling (Drive and Steer)
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.
USE EXTREME CAUTION WHEN DRIVING IN REVERSE.
• To drive straight forward or reverse, move the controllers
for both tracks at the same time, direction and position.
• Always travel in the slow speed setting unless the travel
path is firm, level and uniform.
Travelling (Grades and Side Slopes)
DO NOT DRIVE MACHINE ON GRADES EXCEEDING 20 DEGREES
(36%).
USE RAMPS WHEN TRAVELLING ON STEPS OR OTHER SURFACES
THAT ARE NOT SMOOTH OR HAVE GOOD TRACTION.
WHEN DRIVING ON SIDE-SLOPES, EXTEND THE LOW SIDE OUTRIG-
GERS UNTIL THEY ARE CLOSE TO THE GROUND TO HELP PEVENT A
TIP-OVER IF A CHANGE IN SURFACE OCCURS. (SEE FIGURE 4-2.)
DRIVE ON SIDE-SLOPES WITH THE BOOM STOWED. DO NOT DRIVE
ON SIDESLOPES WHICH EXCEED 10 DEGREES.