Calibrating The Boom Sensors - JLG 1200SJP Service Maintenance Manual

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6.19 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 OPERA-

TION 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 follow-

ing conditions must be met:

a. Steering, telescope crack points, and tilt previously

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°)

Figure 6-14. Boom Sensor Calibration Position 1

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

– JLG Lift –

SECTION 6 - JLG CONTROL SYSTEM

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