JLG 1850SJ, Service And Maintenance Manual, Page: 358 / 712

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
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5.4 CYLINDER LENGTH SENSOR
Both the jib lift cylinder and the platform level cylinder utilize
a cylinder length sensor which communicates with the JLG
control system. These sensors can be removed from without
the cylinder being disassembled.
Removal
1. Lower the platform to the ground or on suitable block-
ing.
NOTE: The jib lift cylinder weighs approximately 186 lbs.(84 kg)
and the platform level cylinder weighs approximately
76 lbs. (34 kg)
2. Support the weight of the jib cylinder and remove the
bolt and keeper pin that secure the cylinder barrel
retaining pin. Remove the pin.
3. Lower the cylinder to a horizontal position to gain
access to the rear of the cylinder.
4. Place a catch pan under the cylinder to capture any oil
that may drain out of the cylinder. If the cylinder is
removed from the machine, drain the oil out of the cylin-
der.
5. Remove the plug that is over the setscrew that secures
the sensor in place.
6. Using an allen wrench, remove the setscrew.
Figure 5-122. Cylinder Length Sensor