SECTION 5 - JLG CONTROL SYSTEM
5-20
31215079
5.6
CALIBRATION PROCEDURES
Chassis Tilt Sensor
(Item 1, Figure 5-5.)
1. Drive the machine onto a measured level surface
(±0.5° for both x and y axis).
2. Using the Analyzer, go to MENU: CALIBRATION; TILT
SENSOR. Press Enter. LEVEL VEHICLE will display.
Press Enter again to calibrate.
3. Both axis’ raw angles need to be within
5.0°, other-
wise the machine is not level and the software will
prohibit calibration. Should this occur, check for the
following:
a.
Machine mounting and/or grade:
With a digital level, measure the top of the
Ground Control box for levelness. If unable to
get a good reading, check the box’s mounting
surface for levelness.
b.
Tilt sensor mounting on machine or wedged
crooked in control box:
If the machine mounting/grade appears
acceptable, open the Ground Control box care-
fully. Observe whether the tilt sensor is prop-
erly seated.
c.
Tilt sensor has developed an offset shift:
Remove the tilt sensor from the Ground Con-
trol box, but keep both the tilt sensor and
Ground Control box electrically connected.
Level one axis of the tilt sensor and observe
the raw reading (should be within ±2.0°). Do
the same for the other axis. If either axis is
greater than ±2.0°, replace the tilt sensor.
Some possible reasons that the tilt sensor will not cali-
brate are:
a. The surface the machine is sitting on is off level
by a few degrees (flat doesn’t imply level; park-
ing lots are often not level).
b. The tilt sensor has failed one or both of the
channels (X axis and Y axis).
c. Tilt sensor has moisture intrusion that has
shifted its output.
d. Water and/or corrosion in the box has cor-
rupted electrical connections or caused a tilt
s e n s o r o r g ro u n d co n t ro l b o a rd f a i l u re
(observe any cracks in the box).
e. The Ground Control Box, as mounted on the
machine, does not allow the tilt sensor to be
level.
For the following troubleshooting steps, a bubble level
(smaller is better) will be needed and the machine must
be on a level surface:
1. On the Analyzer, go to Diagnostics/System and read
the tilt angle. If either angle r20.0°, there is
an electrical/electronic failure (tilt sensor, control
board, electrical connections).
a. Open the Ground Control Box.
b. Disconnect the sensor and clean any corrosion
off of the tilt sensor and control board connec-
tions.
c. Reassemble and test. If fault persists, replace
tilt sensor.
2. If the Analyzer displays angles other than +20.0°,
attempt to calibrate. If machine will not calibrate,
note the reason displayed on Analyzer:
a. SENSOR FAILURE – tilt sensor internal fre-
quency is out of range (replace sensor).
b. NOT LEVEL - tilt sensor has either developed an
offset or it is too unlevel as mounted on the
machine.
Oscillating Axle Tilt Sensor (If Equipped)
(Item 4, Figure 5-6.)
1. Place machine on level surface
2. Start with machine in the stow position
3. Go to CALIBRATIONS > AXLE TILT
4. Select Enter
5. Analyzer says "Level Vehicle"
6. Select Enter
7. Analyzer will display the Axle Tilt Calibration Values
8. Hit Escape to leave menu
1. Ground Control Box
2. Digital or Bubble
Level
2
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