Use and Maintenance Manual – A12 JE A15 JE A17 JE A12 JED A15 JED
Series
7.2.9. Adjustment of the overload controller (load cell)
WARNING!
Usually this device does need to be adjusted unless the device itself is replaced. The equipment
necessary for the replacement and adjustment of this component is such that these operations
should be carried out by skilled personnel.
AS THIS OPERATION IS VERY IMPORTANT IT IS TO BE CARRIED OUT BY SKILLED
TECHNICIANS ONLY.
The AIRO self-propelled articulated boom aerial platforms are
equipped with a sophisticated overload controller.
Normally the overload controller does not require any
adjustments, since it is calibrated in the factory before the
machine is delivered.
This device checks the load on the platform and:
▪ disables all movements if platform is overloaded by 20%
compared to the nominal load (drive and steering disabled
with platform lifted);
▪ with platform in transport position and overloaded by 20%
compared to the nominal load, it disables telescopic boom
lifting and extension;
▪ Warns the user of the overload condition by means of the
audible alarm and the platform warning light.
▪ By removing the overload, the machine can be operated
again.
Check operation at least once a year
The overload controller consists of:
▪ deformation transducer (A);
▪ Display (B) for system calibration placed on the ground
control panel.
Operation check of the overload controller:
▪ When the platform is completely lowered and with slide-out extension deck retracted, load a charge evenly
distributed equal to the nominal load allowed by the platform (see paragraph “Technical features”). In this condition
all operations should be possible both on platform control panel and ground control panel.
▪ When platform is completely lowered add to the rated load an overload of 25% of the nominal load. In this condition
the red alarm light and the audible alarm turn on.
▪ If the platform is at a height from the ground higher than that indicated in chapter “Technical features”, the alarm
condition locks the machine completely (the jib activates its microswitch after exceeding a height of 10° according to
the horizontal axis) the alarm condition blocks the machine completely. To operate the machine again, remove the
overload.
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