JLG 740AJ Operator Manual - Manual (Page 55)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3121654 – JLG Lift – 3-9
6. Boom Malfunction Indicator
If the Boom Malfunction Indicator illumi-
nates when attempting to activate a tower
boom function, the function is being cutout
by tower boom limit switch. The function is not permitted at
the current boom configuration.
If the Boom Malfunction Indicator is flashing or on steady
without a boom function attempt, the upright is out of
alignment or the monitoring system is in need of calibration.
DISCONTINUE OPERATION IF THE BOOM MALFUNCTION LIGHT IS FLASHING OR ON
STEADY.
IF THE UPRIGHT IS OUT OF ALIGNMENT WITH THE PLATFORM RAISED, LOWER THE
MAIN BOOM AND TELESCOPE OUT UNTIL THE PLATFORM REACHES THE GROUND. THE
TOWER BOOM DOWN FUNCTION IS CUT OUT IN THIS CONDITION. REPORT THE PROB-
LEM TO THE PROPER SERVICE PERSONNEL. DO NOT OPERATE THE MACHINE UNTIL
THE MALFUNCTION IS CORRECTED.
7. Platform Overload Indicator. (If Equipped)
Indicates the platform has been overloaded.
8. Drive and Steer Disable Indicator (If equipped)
Indicates the Drive and Steer Disable function
has been activated.