JLG 600A_AJ Operator Manual - Manual (Page 46)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-10 – JLG Lift – 3121204
Platform Control
(See Figure 3-5. and Figure 3-6.)
1. Drive Speed/Torque Select
The machine has a two position switch — The forward
position produces maximum speed and torque by giv-
ing speed when the drive controller is moved. The back-
ward position allows the machine to be driven with the
engine at mid speed.
2. Steer Select (If Equipped)
When equipped with four wheel steering, the action of
the steering system is operator selectable. The center
switch position gives conventional front wheel steering
with the rear wheels unaffected. This is for normal driv-
ing at maximum speeds. The forward position is for
“crab” steering. When in this mode both front and rear
axles steer in the same direction, which allows the chas-
sis to move sideways as it goes forward. This can be
used for positioning the machine in aisle ways or against
buildings. The back switch position is for “coordinated”
steering. In this mode the front and rear axles steer in
the opposite directions to produce the tightest turning
circle for maneuvering in confined areas.
To re-synchronize the front and rear axles, position the
rear drive wheels to the forward drive position by select-
ing either crab or compound steer, then select front
steer (center switch position) to operate the normal
steering function.
ONLY USE THE PLATFORM LEVELING OVERRIDE FUNCTION FOR
SLIGHT LEVELING OF THE PLATFORM. INCORRECT USE COULD
CAUSE THE LOAD/OCCUPANT TO SHIFT OR FALL. FAILURE TO DO SO
COULD RESULT IN DEATH OR SERIOUS INJURY.
3. Platform Leveling Override
This switch allows the operator to adjust the level of the
platform.
4. Horn
Supplies electrical power to the horn when pressed.
5. Power/Emergency Stop
An ON-OFF POWER/EMERGENCY STOP switch and a
separate ENGINE START/AUXILIARY POWER toggle
switch on the platform console supply electrical power
to the starter solenoid, when the ignition switch is placed
in the “ON” position and the ENGINE START switch is
push forward.