JLG 1250AJP Service Manual - Manual (Page 503)

SECTION 6 - JLG CONTROL SYSTEM
3121171 – JLG Lift – 6-71
8. After the 60 seconds has elapsed the control system
will Leave the Enable valves on and turn on the Main
Control Valve and turn on the Tower Lift PVG valve at
a 20% down command 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 sec-
onds. If one of these conditions occur the test will
abort and display on the top line “CHECK FAILED:”
and “MAIN LIFT APU”, “TOWER LIFT APU” or
“TOWER TELE APU” on the bottom line depending
on which section moved.
or
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