JLG 800AJ HC3 Operation & Safety Manual page 54

Machine Controls and Indicators
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 driving 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 chassis 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 selecting either crab or compound steer, then select front steer (center switch position) to
operate the normal steering function.
Tower Boom Stow Indicator (If Equipped)
A green LED illuminates when the tower boom is in the stowed position.
Tower Lift
This switch provides for raising and lowering of the tower boom when positioned to "up" or "down".
Tower Lift must be fully elevated "up" before operating Tower Telescope. (Tower Lift should not
function when Tower Telescope is extended).
To avoid upset and serious injury, do not operate machine if tower lift and
telescope do not operate in the order described above.
Tower Telescope
This switch provides for extending and retracting of the tower boom when positioned to in or out.
Tower Telescope must be fully retracted before operating Tower Lift.
Note: Tower Telescope should not function when Tower Lift is not fully elevated (in the up
position).
To avoid serious injury, do not operate machine if tower lift and telescope do not
operate in the order described above.
54
WARNING
WARNING
31222411 800AJ HC3