JLG 340AJ Operation And Safety Manual page 51

5. Start/Auxiliary Descent Enable
When pushed forward, the switch energizes the starter
motor to start the engine.
When pushed back, it energizes Auxiliary Descent Enable
which allows the boom and jib to be lowered in the event of
engine malfunction. Gravity is used to control valves and
lower the booms and jib. The functions that can be operated
with this control are:
• Main Lift Down
• Tower Lift Down
• Jib Lift Down
6. Fuel Select (Dual Fuel Engine Only) (If Equipped)
Moving the switch to the appropriate position selects gaso-
line or liquid propane fuel.
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SECTION 3 - MACHINE CONTROLS AND INDICATORS
7. Drive Orientation Override
When the boom is swung over the rear tires or further in
either direction, the Drive Orientation indicator will illumi-
nate when the drive function is selected. Push and release
the switch, and within 3 seconds move the Drive/Steer con-
trol to activate drive or steer. Before driving, locate the black/
white orientation arrows on both the chassis and the plat-
form controls. Move the drive controls in a direction match-
ing the directional arrows.
NOTE: To operate the Drive joystick, pull up on the locking ring below
the handle.
NOTE: The Drive joystick is spring loaded and will automatically return
to neutral (off) position when released.
8. Drive/Steer
Push forward to drive forward, pull back to drive in reverse.
Steering is accomplished via a thumb-activated rocker
switch on the end of the steer handle.
9. Telescope
Provides extension and retraction of the main boom.
– JLG Lift – 3-11