Service Manual Instruction Manual

SECTION 6 - JLG CONTROL SYSTEM
6-64 – JLG Lift – 3121171
2. After pressing the ENTER key , the analyzer will
display “CALIBRATING…”on the bottom line and Control
System will calculate load pin cal resultant force 9. The
Control System must see a change in the drive orienta-
tion switch or “CAL FAILED” and “DRIVE ORNT SW” will
be displayed. The Control System will calculate and
record the load pin cal resultant force by averaging the
load pin cal angle resultant forces 8 and 9. If the load pin
cal resultant force is not within 31,140lb +/-13000lb, the
analyzer will display “CAL FAILED” and “LOAD PIN
FAULT”, otherwise the control system shall calculate the
corrected load pin cal moment 9 and calculate and
record the corrected load pin cal moment by averaging
the corrected load pin cal moments 8 and 9. If the load
pin cal moment is not within 1,011,000 +/-566000, the
analyzer will display “CAL FAILED” and “LOAD PIN
FAULT”.
Step 10 - Position 10
1. After completing the previous step, the analyzer will
read:
Lift main down to stop
The Control System will disable all functions except auto
platform level and main lift down. When main lift down
is commanded, the main boom angle will be controlled
to the target angle of 15.0 +/- 3.0 (relative to tower).
When the angle is reached, the Control System will dis-
able main lift down. The Control System will monitor
and record the main lift down crack point at which the