JLG 1250AJP Service Manual - Manual (Page 502)

SECTION 6 - JLG CONTROL SYSTEM
6-70 – JLG Lift – 3121171
7. After the 20 seconds has elapsed the control system
will command the engine back to idle, shut off the
commands to the PVG valves, disengage the Main
Control and PVG enable valves and turn on the Main
Lift, Tower Lift and Tower Telescope Enable valves
and monitor the Main Lift and Tower Lift angles for
decreasing movement of more then 0.2 deg and
Tower Telescope length decreasing movement of
more then 0.5” for 60 seconds. If one of these condi-
tions occur the test will abort and display on the top
line “CHECK FAILED:” and “MAIN LIFT HOLD”,
“TOWER LIFT HOLD” or “TOWER TELE HOLD” on
the bottom line depending on which section moved.
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