JLG 1250AJP Troubleshooting Manual page 294

SECTION 5 - CALIBRATIONS
8. Use the arrow keys to reach DRIVE.
9. Hit Enter. The screen will read:
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10. Hit Enter again. The screen will read:
11. Hit Enter again. The screen will read:
12. Activate the Drive Joystick forward full stroke until
the machine just begins to move, then leave off the
joystick immediately. The display will read CRK PT =
and show the numeric crack point value.
1250AJP 3128411