JLG 600A_AJ Operator Manual - Manual (Page 65)

SECTION 4 - MACHINE OPERATION
3121204 – JLG Lift – 4-9
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. Sequence while RAISING the TOWER BOOM from the
fully lowered position.
a. The TOWER BOOM must be fully elevated “up”
(approximately 13 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”.
2. Sequence while LOWERING the TOWER BOOM from
the fully elevated “up” position.
a. Operate TOWER TELESCOPE “in” until TOWER
BOOM is fully retracted. (TOWER must not lift
“down until boom is telescoped ”in” or “up” fully.
b. The TOWER lift “down” will only operate when the
TOWER BOOM is fully retracted.
TO AVOID TILTING MACHINE IF TOWER BOOM SWITCHING MALFUNC-
TIONS:
— LOWER PLATFORM TO GROUND USING MAIN BOOM LIFT AND TELE-
SCOPE FUNCTIONS.
— HAVE CONDITION CORRECTED BY A CERTIFIED JLG SERVICE TECH-
NICIAN BEFORE CONTINUING USE OF MACHINE.