JLG 4017RS Service Manual - Manual (Page 174)

Electrical System
9-22 3614RS, 4017RS
5. Unplug boom retract sensor connector (1) from wiring
harness connector.
6. Loosen hardware securing boom retract sensor (2) and
remove boom retract sensor from boom.
c. Engine Boom Retract Sensor Inspection and
Replacement
Inspect sensor and wiring harness connector terminals for
continuity. Replace a defective or faulty sensor with a new
part.
d. Boom Retract Sensor Installation
1. Secure boom retract sensor (2) to boom.
2. Connect boom retract sensor connector to wiring harness
connector.
3. Properly connect battery.
4. Close and secure engine cover.
5. Remove Do Not Operate Tag from ignition key switch
and steering wheel.
6.
9.8.7 Boom Angle Sensor
The boom angle sensor is located at the top left inside rear of
the boom.
a. Boom Angle Sensor Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom, place
the transmission in (N) NEUTRAL, engage the park brake
and shut the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the machine
should not be operated.
3. Open the engine cover. Allow the engine to cool.
4. Properly disconnect the battery.
5. Disconnect the boom angle sensor electrical connector.
6. Loosen and remove the nut holding the rod assembly
(3) to the sensor arm.
7. Loosen and remove the two bolts holding the sensor to
the sensor bracket.
8. Remove the sensor assembly.
MZ8260
1
2
M 8210 Z
3
3614RS
4017RS
3
A
B