Control System Boom Sensors; Sensor #1 - Load Pin (1); Sensor #2 - Main Boom Angle Sensors (2); Sensor #3 - Main Boom Length Sensor (1) - JLG 1850SJ Service And Maintenance Manual

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6.6 CONTROL SYSTEM BOOM SENSORS

The Boom Control System (BCS) requires the use of multiple

sensors to measure the position of the boom. The sensors

used to determine main boom and jib boom position are

shown in the following figures.

THE CONTROL SYSTEM MUST BE RECALIBRATED AFTER REPLACING OF ANY

The Main Lift Cylinder is attached to the Turntable with a load

cell pin. This pin is fixed to the Turntable so as to allow mea-

surement of the force exerted by the cylinder regardless of the

cylinder orientation.

See (See Figure 6-25.)

These sensors measure Main Boom angle with respect to grav-

ity. They are located in the rear of the Section #1boom and

mounted such that they generate opposing signals with

respect to boom movement.

SECTION 6 - JLG CONTROL SYSTEM

This sensor is used to measure total stroke of the Main Boom.

It is located in the rear of the Base Boom and consists of a wire

rope attached to a rotating drum.