JLG 680S Operator Manual - Manual (Page 48)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-12 – JLG Lift – 3121233
6. Function Speed Control
Controls the speed of Boom and Swing Functions.
Rotate CCW for slower speed and CW for faster speed.
To adjust to creep, turn knob fully CCW until it clicks.
7. Drive Speed/Torque Select
The forward position gives maximum drive speed by
shifting the drive motors to minimum the displacement
and giving high engine when drive controller is moved.
The back position gives maximum torque for rough ter-
rain and climbing grades by shifting the wheel motors to
maximum displacement and giving high engine speed
when drive controller is moved. The center position
allows the machine to be driven as quietly as possible
by leaving the engine at mid speed and the drive motors
in maximum displacement.
8. Platform Rotate
This switch allows the operator to rotate the basket to
the left or right.
ONLY USE THE PLATFORM LEVELING OVERRIDE FUNCTION FOR
SLIGHT LEVELING OF THE PLATFORM. INCORRECT USE COULD CAUSE
THE LOAD/OCCUPANTS TO SHIFT OR FALL. FAILURE TO DO SO COULD
RESULT IN DEATH OR SERIOUS INJURY.
9. Platform Leveling Override
A three position switch allows the operator to adjust the
automatic self leveling system. This switch is used to
adjust platform level in situations such as ascending/
descending a grade.
10. Not Used
11. 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.