JLG 1500SJ Service Manual - Manual (Page 489)

SECTION 6 - JLG CONTROL SYSTEM
3121262 – JLG Lift – 6-37
6.6 CONTROL SYSTEM BOOM SENSORS
NOTE: Note: The machine is defined as being in transport
mode if:
Axles are retracted.
Main boom lift is below elevation angle.
Main boom telescope is fully retracted.
Jib boom telescope is fully retracted.
Jib boom locked inline with the main boom via the jib
lock pin.
Turntable swung so that the main boom is between
the rear wheels.
The Boom Control System (BCS) uses a number of sen-
sors to measure the position of the boom. The sensors
used to determine main boom and jib boom position are
shown in Figure 6-18., Control System Boom Sensors.
Sensor #1 - Moment Pin
The Main Lift Cylinder is attached to the Turntable with a
single axis load cell pin which measures load on the
boom.
Sensor #2 - Main Boom Angle Sensors
These sensors measure Main Boom angle in reference to
gravity. They are located in the rear of the Base Boom and
mounted such that they generate opposing signals with
respect to boom movement.
MOMENT
PIN