JLG 740AJ ANSI Operator Manual - Manual (Page 78)

SECTION 4 - MACHINE OPERATION
4-12 – JLG Lift – 3121650
Raising and Lowering the Tower Boom
To raise or lower the Tower Boom, depress footswitch,
position Tower Lift controller Up or Down, and hold
until the desired height is reached.
DISCONTINUE OPERATION IF THE UPRIGHT IS OUT OF ALIGNMENT OR THE BOOM
MALFUNCTION LIGHT REMAINS ILLUMINATED.
IF THE UPRIGHT IS OUT OF ALIGNMENT WITH THE PLATFORM RAISED, LOWER THE
MAIN BOOM AND TELESCOPE OUT UNTIL THE PLATFORM REACHES THE GROUND. THE
TOWER BOOM DOWN FUNCTION IS CUT OUT IN THIS CONDITION. REPORT THE PROB-
LEM TO THE PROPER SERVICE PERSONNEL. DO NOT OPERATE THE MACHINE UNTIL
THE CONDITION IS CORRECTED.
Raising and Lowering the Main Boom
To raise or lower the Main Boom, position the Main
Boom Lift switch to Up or Down until the desired
height is reached.
Telescoping the Main Boom
To extend or retract the main boom, use the Main
Telescope Control Switch to select In or Out move-
ment.
4.8 SHUT DOWN AND PARK
1. Drive machine to a protected area.
2. Assure boom is fully retracted and lowered over rear (Drive)
axle; all access panels and doors closed and secured.
3. Remove all load and allow engine to operate 3-5 minutes at
idle to permit reduction of engine internal temperatures.
4. At Ground Controls, turn Key Select switch to (center) Off
Position, Power/Emergency Stop switch (down) to Off.
Remove key.
5. Cover Platform Control console to protect instruction plac-
ards, warning decals and operating controls from hostile
environment.