JLG ERT2669, Руководство по обслуживанию и ремонту

Страница: 308 / 376

SECTION 5 - JLG CONTROL SYSTEM
5-66 31215923
5.8 CALIBRATION PROCEDURES
Chassis Tilt Sensor - Non QuikLevel Equipped
Machine
1. Drive the machine onto a measured level surface
(±0.5° for both x and y axis) and ensure the platform
is stowed.
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

1.0°, 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 chassis for lev-
elness.
b. Tilt sensor mounting on machine:
Remove the tilt sensor from the chassis, but
keep the tilt sensor electrically connected.
Level one axis of the tilt sensor and observe
the raw reading (should be within ±1.0°). Do
the same for the other axis. If either axis is
greater than ±1.0°, replace the tilt sensor.
Some possible reasons that the tilt sensor will
not calibrate 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
sensor or ground control board failure observe
any cracks in the box).
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. Disconnect the sensor and clean any corrosion
off of the tilt sensor and control board connec-
tions.
b. 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 communication
can not be established.
b. NOT LEVEL - tilt sensor has either developed an
offset or it is too unlevel as mounted on the
machine or the surface on which the machine
sits is not level.