JLG 1850SJ, Service And Maintenance Manual, Page: 511 / 712

SECTION 6 - JLG CONTROL SYSTEM
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6.11 SETTING CRACKPOINTS
Crackpoints, the point at which a valve is opened enough to
induce movement, must be set for a variety of reasons: when-
ever related valves or cartridges are changed, software is
updated, the UGM is changed, or the boom envelope control
does not seem to be functioning properly.
The crackpoints covered in this section are:
• Platform Level Up and Down,
• Jib Level Up and Down,
• Main Lift Up and Down,
• Main Telescope Out and In.
THE JLG ANALYZER WILL PROMPT USERS FOR A CODE UPON REACHING MENU:
OPERATOR ACCESS. THIS FIVE-DIGIT CODE (33271) WILL DISABLE THE BOOM
ENVELOPE CONTROL. WHEN THE BOOM ENVELOPE CONTROL IS DISABLED,
THE MACHINE MAY TIP IF USED INCORRECTLY.
DO NOT ATTACH THE ANALYZER TO THE CONNECTION PORT IN THE PLAT-
FORM. DO NOT CONDUCT ANY CRACKPOINT SETTINGS FROM THE PLATFORM.
NOTE: Cycle the boom functions (8 to 10 times, 5 seconds in each
direction) prior to setting the crackpoints to ensure the
hydraulic oil is at operating temperature.
NOTE: If ESC is pressed while calibration readings are being
taken, the calibration will abort, and CAL FAILED will
appear on the analyzer. The previous calibration values
will be used instead. Only press ESC when instructed
to do so.
During all Control System lag times, the analyzer will dis-
play CALIBRATING...
Platform Level Up and Down Crackpoints
NOTE: To set crackpoints for Platform Level Up and Down, a JLG
analyzer is needed. Have an assistant on hand to help ver-
ify that movement occurs.
1. Connect the JLG analyzer to the machine at the Ground
Controls. Start the engine.
2. Scroll to MENU: OPERATOR ACCESS and press ENTER
.
3. Enter code 33271 and press ENTER .