JLG 1250AJP Service Manual - Manual (Page 494)

SECTION 6 - JLG CONTROL SYSTEM
6-62 – JLG Lift – 3121171
2. After pressing the ENTER key , the Control
System will verify the measured length of the tower
boom matches the expected length of 305.4” +/-
0.5”, otherwise, the analyzer will display “CAL
FAILED” on the top line and “TWR IN TO MIN” on
the bottom line each time the ENTER key is
pressed and the measured length does not match
the expected length.
Step 8 - Position 8
1. After completing the previous step, the analyzer will
read:
The Control System will disable all functions except
auto platform level and tower lift up and down. The
Control System will monitor and record the tower lift
down crack point at which the control system
detects movement of the cylinder angle sensor (if
required). When tower lift is commanded, the tower
cylinder angle will be controlled to target angle of
74.6 +/-0.5 (relative to the turntable). When the tar-
get angle is reached the Control System will disable
tower lift up and down. If the tower angle (ref. To
gravity) gets below 66 disable tower lift down and
display “CAL FAILED” and “TOWER TOO LOW” on
the analyzer.