JLG 1850SJ Service And Maintenance Manual page 508

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Table of Contents

SECTION 6 - JLG CONTROL SYSTEM

3. If all of the initial conditions are passed, the analyzer will

The control system will suppress the latched faults ("LIFT

RESPONSE") to allow the boom out of transport position

until the boom is unlocked or the test is cancelled.

Engage main lift until the control system cuts it out. The

system will cut out at 7°. Only lift up and lift down will be

available while on this menu, all other functions will be

cut out. After the machine reaches the stop point, the

menu will automatically advance.

4. After the machine has reached the set point in step 3,

Lift up and down functionality will be cut out and Tele-

scope in and out functionality will be restored. The ana-

lyzer menu will display:

Engage Tele Out until the control system cuts it out. The

system will cut out at 60.0". After the machine reaches

the set point, the menu will automatically advance and

Telescope in and out will be cut out. During this test, the

telescope response will be tested. Telescope out will

have to be commanded for at least 3 seconds, and meet

the requirements for movement and for the correct

direction. If the machine reaches the telescope set point

without 3 seconds of continuous operation, it will be

assumed that the telescope response was correct and

the menu will advance. If the machine does not move, or

moves in the wrong direction, the menu "CHECK FAILED

WRONG TELE DIR. " will be displayed and the test will

end. The WRONG TELE RESPONSE fault will still be active,

and the boom unlock procedure will have to be

attempted again.

Troubleshooting