JLG 1250AJP Service Manual - Manual (Page 496)

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 orientation 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 cor-
rected load pin cal moment 9 and calculate and
record the corrected load pin cal moment by aver-
aging 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 (rela-
tive to tower). When the angle is reached, the Con-
trol System will disable main lift down. The Control
System will monitor and record the main lift down