JLG 260MRT Operator Manual - Manual (Page 53)

SECTION 4 - MACHINE OPERATION
3121219 – JLG Lift – 4-3
4.3 OPERATING CHARACTERISTICS
Leveling Jacks
The machine may be equipped with auto leveling jacks with
a manual adjust feature. These leveling jacks are operated
through one switch unlike the traditional four switch system.
The leveling jacks are operated by a bang bang valve.
NOTE: The engine speed will drop when the leveling jacks are
activated.
Auto Leveling
1. With the machine in the stowed position turn the power
on, start machine and depress the leveling jack selec-
tion switch located on the front of the platform control
box.
2. While squeezing the red trigger switch on the controller,
move the controller forward.
3. Once the leveling jacks make contact with the ground
surface there will be up to a 5 second delay before the
actual auto leveling begins.
NOTE: Due to varying ground conditions, there may be several
delays between machine level corrections. Be sure ample
time is allowed for all leveling adjustments to be com-
pleted.
4. Continue to engage the leveling jacks until the tilt light
stops blinking and is no longer lit.
NOTE: If you receive a 2/5 flash code through the system fault
light at the platform control station the machine is unable
to level. You must reposition and try again.
5. To retract the leveling jacks, move the controller back-
ward until the desired position is obtained.
NOTE: The tilt light serves as an indicator that the machine is out-
side the allowable lifting operation. When the machine
reaches a position within level of the specific market
specification, the tilt light will go out. Once the light is out,
the level adjustment of the machine may still be improved.
(See Manual Level Adjustment (Trim) section).
NOTE: There is a limit switch that senses when all four cylinders
are fully retracted and this will light up the four leveling
jack lights in the platform control station.
The proximity sensor will not allow the jacks to be
extended or retracted when the machine is elevated. If
there is a proximity sensor failure you cannot use the lev-
eling jacks.