JLG G12-55A AccuPlace Service Manual - Manual (Page 165)

9.47 G10-55A & G12-55A AccuPlace
Electrical System
9.15.5 Calibrations
Machine calibrations are required to initialize
components and to account for mechanical mounted
offsets (i.e., zero the components). If the ESC key is
pressed during the calibration procedure, the calibration
will be aborted and "CAL FAILED" will be displayed on
the bottom line of the analyzer and the previous
calibration values will be used.
Initial conditions:
• Ensure the forks are unloaded and boom is fully
retracted.
• All four tires are the same size/inflation.
• The machine is on an even and level surface
(within ±0.3°) and ensure the boom is level side-
ways (±0.3°).
• The Boom and Fork appear visually level.
a. Chassis Tilt Sensor Calibration
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL and engage the park brake.
2. With a digital level, ensure the machine is on an
even and level surface (within ±0.3°) and the boom is
level sideways (±0.3°).
a. If angle is not within ±0.1° tolerance, relocate the
machine or use the outriggers to make the
necessary adjustments to reach the tolerance.
3. With the hand held analyzer, put the machine into
access level 2 (Access Level 2 Code: 33271).
a. Under the “CALIBRATION” menu, enter the
“CHASSIS TILT” calibration.
b. The analyzer will display “LEVEL VEHICLE” on
the top line and the angle reading on the bottom
line.
c. Press the ENTER key on the analyzer. If both tilt
sensor angles are acceptable, the analyzer will
display “CAL COMPLETE”.
Note: If the initial sensor angle conditions are not met,
the analyzer will display “CAL FAILED”. Adjust the
machine position and repeat the tilt sensor calibration.
b. Boom Angle Sensor Calibration
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom to
the machine stop, place the transmission control
lever in (N) NEUTRAL and engage the park brake.
Note: Ensure the boom end/quick switch is not in
contact with the ground.
2. With the hand held analyzer, put the machine into
access level 2 (Access Level 2 Code: 33271).
a. Under the “CALIBRATION” menu, enter the
“BOOM ANGLE” calibration.
b. When calibrating the boom angle sensors, the
analyzer will display “BOOM CAL POS 1” on the
top line and “BOOM DOWN?” on the bottom line.
c. Press the ENTER key on the analyzer.
d. If the boom angle is within the acceptable range,
the first calibration point will be accepted and the
analyzer will display “BOOM CAL POS 2” on the
top line and “BOOM UP?” on the bottom line.
e. Lift the boom to the end of stroke then press the
ENTER key on the analyzer.
f. If the boom angle is within the acceptable range,
the calibration point will be accepted and the
analyzer will display “CAL COMPLETE”;
otherwise “CAL FAIL LT ANGL” or “CAL FAIL RT
ANGL”.
g. If “CAL FAILED”, make necessary adjustments
and repeat the calibration process.
Note: The calibration procedure will simultaneously
calibrate both the left and right boom angle sensors.
c. Boom Length Sensor Calibration
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL and engage the park brake.
2. With the hand held analyzer, put the machine into
access level 2 (Access Level 2 Code: 33271).
a. Under the “CALIBRATION” menu, enter the
“BOOM LENGTH” calibration.
b. When calibrating the boom length sensor, the
analyzer will display “BM LNGTH CAL POS 1” on
the top line and “BOOM RETRACTED?” on the
bottom line.
BOOM POS 1
Left Boom Angle Raw Counts = 32000 ±4000
Right Boom Angle Raw Counts = 180 ±50
BOOM POS 2
Left Boom Angle Raw Counts = POS 1 + 27490
±1100
Right Boom Angle Raw Counts = 910 ±60