JLG 1500SJ Service Manual - Manual (Page 543)

SECTION 6 - JLG CONTROL SYSTEM
3121262 – JLG Lift – 6-91
6.18 CALIBRATING THE BOOM SENSORS
DURING THE BOOM SENSOR CALIBRATION PROCEDURE, IT IS
NORMAL FOR THE REAR WHEEL TO LIFT FROM THE GROUND
APPROXIMATELY 1 INCH (2.5 CM). IF THE WHEEL RAISES
APPRECIABLY MORE THAN THIS (I.E. 4 INCHES [10 CM] OR
MORE), CHECK THE AXLE OSCILLATION SYSTEM FOR PROPER
OPERATION OR THE NEED FOR BLEEDING, THEN PROCEED WITH
THE BOOM SENSOR CALIBRATION PROCEDURE.
Use the following step-by-step procedure to calibrate the
boom sensors.
1. Before the boom sensors can be calibrated, the fol-
lowing conditions must be met:
a. Steering, telescope crack points, and tilt previ-
ously calibrated
b. Axles Extended
c. Wheels Straight
d. Platform Unloaded
e. Jib Horizontal
f. Jib Swing Centered
g. Platform Level
h. Platform Centered
i. Turntable Centered
j. Boom Fully Retracted
k. Level Ground (within 1.5°)
2. Position the Platform/Ground select switch to the
Ground position.
3. Plug the analyzer into the connector inside the
Ground control box.
4. Pull out the Emergency Stop switch and start the
engine.
Figure 6-21. Boom Sensor Calibration Position 1