JLG 800A_AJ Operator Manual - Manual (Page 73)

SECTION 4 - MACHINE OPERATION
3121209 – JLG Lift – 4-11
Raising and Lowering the Tower Boom
This machine will have two controls for the tower boom (two
toggle switches), one controls tower lift, the other tower tele-
scope. The switching system will sequence its LIFT and
TELESCOPE functions 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”
(approximately 12 degrees from vertical) before the
TOWER BOOM can be extended from the fully
retracted position.
b. The TOWER TELESCOPE “out” will only be opera-
ble 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 lowered.
b. TOWER BOOM lift “down” will only be operable
when the TOWER BOOM is fully retracted.
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 platform reaches desired position.