Service Manual Instruction Manual

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 seconds. If one of these condi-
tions 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 depend-
ing on which section moved.
or
or