JLG 4017 Service Manual - Manual (Page 146)

Electrical System
9.26 4017
Note: If either the button or magnet is released too early
the display will revert to the uncalibrated condition
number 4.
THE SYSTEM ALLOWS FIVE MINUTES for each
part of the calibration procedure to be completed. If a
part of the calibration procedure is not completed
within the five minutes allowed the system will
automatically revert to the uncalibrated error
condition number 4.
IF THE IGNITION IS SWITCHED OFF during first
calibration the system will remain in the uncalibrated
condition.
2. For any subsequent calibration:
PRESS and hold the TEST button, and place the
magnet in position level with and just to the right of
the TEST button. The display will show all LEDs
flashing and sounder on. The correct position is
indicated when the sounder stops and all LEDs stay
on.
• Calibration Procedure
1. Set 0%
ARRANGE the machine on level ground in the 0%
calibration position, (ie boom is retracted, forks
lowered but not resting on the ground, and no load on
the forks).
PRESS the TEST button ONCE. The system will give
a single, short beep indicating that the 0% point is
set. The display will change to show the red and
amber LEDs lit (with continuing intermittent beeps),
indicating that the system is ready and waiting for the
100% reference.
Note: If a long beep is emitted from the sounder during
calibration, this indicates a fault condition - see below.
2. Set 100%
PICK up the calibrated (maximum capacity) 100%
load and extend the boom to the pre-determined,
normal 100% point.
PRESS the TEST button ONCE to set the 100%
reference.
The display will now change back to normal
operation, and show 100%, (ie all green and amber
LEDs lit and flashing).
System calibration has now been completed. No
further action is required.
9.11.12 Front and Rear Axle Proximity
Sensors
The sensors used on each axle allow the steering to be
changed to one of three different settings. The sensors
will not allow the change to be completed unless both
axles are in the central location.
Each sensor is mounted in the center of each steer
cylinder.
a. Removal
1. Open engine cover. Allow engine to cool.
2. Disconnect the negative (-) battery cable at the
negative (-) battery terminal.
3. Unplug the axle proximity sensor from the wiring
harness.
4. Remove the three bolts holding the sensor to the
steering cylinder barrel.
b. Disassembly
1. Inspect the sensor and the wiring harness connector
terminals for continuity. Replace a defective or faulty
sensor with a new sensor.
c. Installation and Testing
1. Install the three bolts holding the sensor to the
steering cylinder barrel.
2. Connect the axle proximity sensor to the wiring
harness.
3. Connect the negative (-) battery cable to the negative
(-) battery terminal.
4. Close and secure engine cover.
5. Start the machine, select a steering mode, turn the
steering wheel until the display unit shows the
steering has been "locked" into the selected mode.