Service Manual Instruction Manual

SECTION 6 - JLG CONTROL SYSTEM
3121171 – JLG Lift – 6-55
• During calibration if the main boom becomes
extended the Control System will abort the calibration
sequence and the analyzer will display “CAL FAILED”
and “MAIN EXTENDED”. Continue to display “CAL
FAILED” and follow the electrical retrieval system
sequence for positions of backward stability concern
until all transport positions are met or the power is
cycled. Refer to Section 4.9, Electrical Retrieval System.
Step 1 - Position 1
1. After the machine is in Position 1, using the analyzer, put
the machine into Access Level 1 and enter the “BOOM
SENSORS” calibration.
The analyzer will read:
After pressing the ENTER key , the Control System
will verify the load pin, main boom angle, tower boom
angle, tower lift cylinder rotary angle, and tower boom
length sensors are reporting valid data, the axles are
completely extended, the wheels are straight within 10,
the tower length sensors are reading less than 8.41
inches plus 6.39 inches (21.36 cm plus 16.23 cm) of toler-
ance for the upper length and 12.47 inches plus 6.39
inches (31.67 cm plus 16.23 cm) of tolerance for the
lower length, tower boom transport length, main boom
transport length, and main boom dual capacity length,
limit switches are all in the retracted positions, the main
boom transport angle switch is in the transport position,
the tower lift cylinder rotary angle sensor reads less than
21.5 +15 of tolerance, the drive orientation switch is
indicating the turntable is between the rear tires, the jib
aligned switch is on, the chassis tilt sensor reads less
than 1.5 out of level, the steering and tilt sensor calibra-
tions have been successfully completed, and the
machine is in Ground Mode.
If these conditions are not met, the analyzer will prompt
the operator with any of the following analyzer mes-
sages necessary to satisfy the initial conditions.
•“BLAM CAN LOST”
• “AXLE VALVE FAULT”
• "OSC AXL SW FAULT”
• “PARK BRAKE FAULT”
• “LOAD PIN FAULT”
•“MAIN ANGL1 FAULT”
•“MAIN ANGL2 FAULT”
• “TWR ANGL1 FAULT”
• “TWR ANGL2 FAULT”
• “CYL ANGL FAULT”
• “TWR LEN1 FAULT”,
• “TWR LEN2 FAULT”
• “EXTEND AXLES”
• “CENTER WHEELS”
•“TOWER IN”
• “MAIN DOWN”
• “TOWER DOWN”
• “RETRACT MAIN”
• “ALIGN TURNTABLE”
•“CENTER JIB SWING”
• “LEVEL MACHINE”