Telescoping The Main Boom; Function Of Tower Boom - JLG 800A Operation And Safety Manual

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.

Function of 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. 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" or "in" will only be
operable when the TOWER BOOM is fully elevated
"up".
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2. 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. The TOWER BOOM lift "down" will only be operable
when the TOWER BOOM is fully retracted.
TO AVOID UPSET IF TOWER BOOM SWITCHING MALFUNCTIONS:
— LOWER PLATFORM TO GROUND VIA MAIN BOOM LIFT AND TELE-
SCOPE.
— HAVE CONDITION CORRECTED BY A CERTIFIED JLG SERVICE
TECHNICIAN BEFORE CONTINUING USE OF MACHINE.
– JLG Lift –
SECTION 4 - MACHINE OPERATION
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