Telescopic Boom Series
Models SJ61T & SJ66T
194312
December 2007 Page 225
Section 5 - Procedures Service and Maintenance
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5.11-1 Load Sensing System - CE
The Skyjack boom platform overload sensing system is based on load cell or electronic scale technology. The deck
steel structure is isolated from the aerial platform. The load cell is permanently bolted between the deck and the
rotary actuator mount. The load cell will only respond to the vertical component of the load in the platform. There
are four external bolted connections that serve as a redundant back up system for the load cell connection. The
system is rst calibrated with an empty platform to set the tare weight to zero. The following steps of the process
set the overload limit as regulated by applicable safety standards for Mobile Elevated Work Platforms.
Load Cell
LED Display
Error LED
Alarm LED
Interface Connector
Zero/Tare LED
Power LED
“T" Label
“4" Button
“Teach in" Handset
(Service only)
Platform Control Console
Indicator Module
Overload Light
Bottom View of Deck
Aerial Platform
(Rotary Actuator Mount)
External Bolts
Load Cell
Permanent Bolts
Deck
Error LED - Continously on when system error
Alarm LED - Continously on when platform is overload or has base contact
Interface Connector - Storage of limit valve (“Teach in" handset connects here)
Orange LED - Continously on when tare value is zero ± 15kg
Green LED - Flashes slowly on when system powered and calibrated
NOTE
When power is turned on and after a four second time period elapses, the overload light and audible
alarm will pulse two times. This indicates the system is active and there are no faults.
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