JLG 340AJ Operator Manual - Manual (Page 58)

SECTION 4 - MACHINE OPERATION
4-10 – JLG Lift – 3121258
Raising and Lowering the Tower Boom
To raise or lower the Tower Boom, position Tower Boom Lift
switch to Up or Down until desired height is reached.
Raising and Lowering the Main Boom
To raise or lower the Main Boom, use Main Boom Lift control-
ler to select UP or DOWN movement.
Telescoping the Main Boom
To extend or retract the main boom, use the Main Telescope
Control Switch to select IN or OUT movement.
4.8 FUNCTION SPEED CONTROL
This control affects the speed of telescope, tower boom lift
and jib lift. Turning the knob all the way counterclockwise
until it clicks puts drive, main lift, platform rotate, and swing
into creep mode.
4.9 DUAL FUEL SYSTEM (GAS ENGINE ONLY)
The dual fuel system enables the standard gasoline engine
to run on either gasoline or LP gas.
IT IS POSSIBLE TO SWITCH FROM ONE FUEL SOURCE TO THE OTHER
WITHOUT ALLOWING THE ENGINE TO STOP. EXTREME CARE MUST BE
TAKEN AND THE FOLLOWING INSTRUCTIONS MUST BE FOLLOWED.
Changing From Gasoline to LP Gas
1. Start engine from Ground Control Station.
2. Open hand valve on LP gas supply tank by turning
counterclockwise.
3. While engine is operating on GASOLINE under a no-
load condition, place FUEL SELECT switch at Platform
Control to LP position.