JLG 4017 Service Manual - Manual (Page 144)

Electrical System
9.24 4017
9.11.9 Boom Angle Sensor
The boom angle sensor (1) is located at the top left inside
rear of the machine.
a. Boom Angle Sensor Removal
1. Open engine cover. Allow engine to cool.
2. Disconnect the negative (-) battery cable at the
negative (-) battery terminal.
3. Disconnect the boom angle sensor electrical
connector.
4. Loosen and remove the nut holding the rod
assembly to the sensor arm.
5. Loosen and remove the two bolts holding the sensor
to the sensor seat.
6. Remove the sensor assembly.
b. Boom Angle Sensor Inspection and Replacement
Inspect the sensor and the wiring harness connector
terminals for continuity. Replace a defective or faulty
sensor with a new sensor.
c. Boom Angle Sensor Installation
1. Install the sensor assembly to the sensor seat and
tighten both bolts.
2. Install the rod end to the sensor arm and tighten nut.
3. Measure and set rod length to 256.5 mm. (10 in) if
needed.
4. Plug the electrical connector into the sensor
assembly.
5. Connect the negative (-) battery cable to the negative
(-) battery terminal.
6. Close and secure engine cover.
d. Boom Angle Sensor Adjustment
1. Access Level 2 can be reached by pressing buttons
C and OK at the same time.
2. Access level 2 consists of the following menu-items:
• Anti theft device
• Software-Version
• Learning
3. The following submenus can be found in the
Learning menu.
• Boom
• Vehicle Speed
4. After choosing boom the analog values of the boom
angle sensor for the upper and lower limit positions
get determined and taken over.
The range detection of the analog values for the
boom must be performed for the boom angle sensor
in order to allow a precise calculation of the boom
angle.
Firstly, the upper analog value is learned. When the
boom is moved upwards (joystick Y-axis moved to
the back) one can see the analog value gets higher.
At the upper limit position of the boom the value gets
confirmed by pressing the OK button and the learning
of the lower limit position can be started. When the
boom is moved downwards (joystick Y-axis moved to
the front) the value decreases. At the lower limit
position the value needs to be confirmed with the OK
button and one comes back to the Learning menu.
Conditions for the value range:
• If the lower value is outside the range of 70-330, a
value of 100 is taken over.
• If the upper value is outside the range of 550-850, a
value of 800 is taken over.
5. If either the lower value (100) or the upper value
(800) is shown, the boom angle rod may need
adjusted.
MZ1320
256.5 mm (10 in)
1