JLG 1500SJ Service Manual - Manual (Page 492)

SECTION 6 - JLG CONTROL SYSTEM
6-40 – JLG Lift – 3121262
Sensor #6 - Jib Level Angle Sensor
This sensor is used to measure Jib Level angle in relation-
ship to the Main Boom. It is a rotary type sensor mounted
between the Main Boom Fly nose and the Jib Pivot weld-
ment. This sensor is used for velocity control and for jib
leveling closed loop control.
Sensor #7 - Jib Lock Pin Switch
This sensor is used to indicate the Jib Lock Pin is fully
engaged. It is an inductive proximity switch mounted to
the Jib Pivot weldment with both Normally Open and Nor-
mally Closed contacts wired into the control system.
Sensor #8 - Jib Stow Angle Sensor
This sensor is used to measure Jib swing angle. It is a
rotary sensor mounted to the underside of the Jib Pivot
weldment. This sensor is used for velocity control only.
Sensor #9 - Jib Lift Cylinder Angle Sensor
This sensor's function is to measure the Jib angle in rela-
tionship to the Main Boom Pivot weldment. The sensor
does this by measuring cylinder stroke. It is a linear posi-
tion type sensor located inside the Jib lift cylinder. This
sensor is used for velocity control only.