JLG 740AJ Service Manual - Manual (Page 275)

SECTION 4 - BOOM & PLATFORM
3121160 – JLG Lift – 4-59
7. Enter the service code "81075" and press the
"ENTER" key. The controller display will now
display the following,
followed by:
The flashing and scrolling messages will repeat until
the "ENTER" key is pressed.
8. When the "ENTER" key is pressed, the UMS
will be disabled and the display will read:
9. Before using tower lift down adhere to the following:
• Make sure the main boom is fully retracted.
• Make sure the tower boom is fully retracted.
• Slowly lower the tower boom.
10. When the platform has been safely lowered to the
ground, exit the service mode by pressing the Emer-
gency Stop Switch (EMS) at the ground controls.
Upon loss of power (pressing the EMS) to the sys-
tem, the upright monitoring system will reset and all
functionality will be restored to the machine.