Tilt Vs. Allowed Height Evaluation - JLG 1930ES Service Maintenance Manual

Tilt vs. Allowed Height Evaluation

First, find a level surface (not just flat like a parking lot;
must be level). The surface should be a plane in which the
wheels are within 00.2. Find this surface by taking a
digital level and measuring the areas on which the wheels
would rest in both the X and Y directions. Mark the loca-
tions and drive the machine to these points. If a level sur-
face can not be found, flat shims or plates may be place
under the wheels to create a level plane for the wheels.
In determining the existing tilt angle, read the angle on the
Analyzer under DIAGNOSTICS/SYSTEM. Do not place a
hand-held level on the machine to determine whether the
machine is level and lifting to the appropriate height. Such
a measurement will likely be different than the Ground
box/tilt sensor angle reading due to manufacturing and
mounting tolerances. The tilt angle in both directions
should read within 0.5 while on a level surface. If not,
then either the machine has a drifting tilt sensor or has
been erroneously re-calibrated since the original factory
calibration.
Check the service records to determine whether a re cali-
bration has been performed. If so, re-calibrate on the level
surface. If there is no record of an earlier calibration, we
must assume that the sensor output has drifted. There-
fore, replace the sensor and return to JLG with a detailed
troubleshooting description.
NOTE: There is a rare case in which an attempted calibra-
tion will be unsuccessful for machines with Ground
module software version P1.5 or earlier. If this
occurs while performing a calibration, the Analyzer
will display:
LEVEL VEHICLE
TILT +20.0 +20.0
and the following fault will also be logged.
TILT SENSOR NOT CALIBRATED (2/3) [DTC 811]
If no other faults have been logged since the last startup,
this fault indicates that the software needs to be updated
to P1.6 or later. Update the software and continue trouble-
shooting evaluation before replacing any components.
If the tilt sensor readings are within range for a level
machine, compare the allowed Tilt vs. Height in the chart
below. Being within 6" of the target height is considered
acceptable.
3121166
SECTION 5 - JLG CONTROL SYSTEM
Tilt Setting
Model
(front to back)
1930ES 3°
2030ES 3°
2630ES 3°
2646ES 3°
3246ES 3°
If the machine does not appear to track the lift cutout
heights and no fault exists as described above, stow the
machine and re calibrate the Elevation Sensor.
– JLG Lift –
Table 5-1. Tilt Settings
Tilt Setting Maximum Deck
(side to side)
1.5° 18.75 ft (5.7 m)
2° 14 ft (4.3 m)
2.5° 11 ft (3.4 m)
3° 9 ft (2.7 m)
1.5° 20 ft (6 m)
2° 15 ft (4.5 m)
2.5° 12 ft (3.7 m)
3° 10 ft (3 m)
1.5° 25.4 ft (7.7 m)
2° 20 ft (6 m)
2.5° 16 ft (4.9 m)
3° 13 ft (4 m)
2° 26 ft (7.9 m)
2.5° 22 ft (6.7 m)
3° 20 ft (6 m)
2° 31.75 ft (9.7 m)
2.5° 22 ft (6.7 m)
3° 20 ft (6 m)
Elevation
5-7