Raising And Lowering The Tower Boom - JLG 800A Operation And Safety Manual

Raising and Lowering the Tower Boom

This machine will have two controls for the tower boom (two tog-
gle switches), one controls tower lift, the other tower telescope.
The switching system will sequence its LIFT and TELESCOPE func-
tions as follows:
1. Depress footswitch and sequence while RAISING the TOWER
BOOM from the fully lowered position.
a. The TOWER BOOM must be fully elevated "up" (approxi-
mately 12 degrees from vertical) before the TOWER
BOOM can be extended from the fully retracted posi-
tion.
b. The TOWER TELESCOPE "out" will only be operable
when the TOWER BOOM is fully elevated "up".
2. Depress footswitch and sequence while LOWERING the
TOWER BOOM from the fully elevated "up" position.
a. TOWER TELESCOPE "in". The TOWER BOOM must be
fully retracted before the TOWER BOOM can be low-
ered.
b. TOWER BOOM lift "down" will only be operable when
the TOWER BOOM is fully retracted.
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Raising and Lowering the Main Boom
To raise and lower Main Boom, depress footswitch, position MAIN
LIFT controller to UP OR DOWN, and hold until desired height is
reached.
Telescoping the Main Boom
To extend or retract Main Boom, depress footswitch, position
MAIN TELESCOPE control switch to IN or OUT, and hold until plat-
form reaches desired position.
– JLG Lift –
SECTION 4 - MACHINE OPERATION
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