JLG 600A Operation And Safety Manual page 49

6. Auxiliary Power
Energizes the electrically operated hydraulic pump,
when actuated. (Switch must be held ON for duration of
auxiliary pump use.)
The auxiliary pump functions to provide sufficient oil flow
to operate the basic machine functions should the main
pump or engine fail. The auxiliary pump will operate
tower boom lift, tower telescope, main boom lift, main
telescope and swing.
7. Fuel Select (Dual Fuel Engine Only) (If Equipped)
Gasoline or liquid propane fuel may be selected by mov-
ing the switch to the appropriate position. It is unneces-
sary to purge the fuel system before switching fuels, so
there is no waiting period when switching fuels while the
engine is running.
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SECTION 3 - MACHINE CONTROLS AND INDICATORS
8. Lights (If Equipped)
This switch operates control console panel lights and
head lights if the machine is so equipped. The ignition
switch does not have to be on to operate the lights, so
care must be taken to avoid draining the battery if left
unattended. The master switch and / or the ignition
switch at the ground control will turn off power to all
lights.
9. Drive/Steer
The DRIVE joystick provides for driving either forward or
backward. The controller is 'ramped' to allow variable
drive speed.
Steering is controlled by a thumb operated switch on
top of the joystick.
NOTE: When boom is positioned above horizontal and any of the
following switches, DRIVE SPEED/TORQUE SELECT or
FUNCTION SPEED, are positioned to HIGH, high function
speeds are automatically cut out and the machine contin-
ues to operate at a lower speed.
– JLG Lift – 3-13