JLG 80HX_HX+6 Operator Manual - Manual (Page 71)

SECTION 4 - MACHINE OPERATION
4-8 – JLG Lift – 3120890
13. To retract extendable axles:
a. Position STEER/AXLES valve located adjacent
to right front wheel to AXLES.
b. Activate the machine hydraulic system and raise
the boom and extend the boom no more than
2.4 meters.
c. Position the boom over the steer wheel end of
the machine; on machines with fixed axles,
remove tie rod lock pins, steer cylinder pin and
axle lock pins.
NOTE: It may be necessary to elevate the wheels and jog
the steer control for removal of lock pins.
NOTE: On machines equipped with Soft Touch Proximity
System, the operator must press and hold the over-
ride button on the front of the control box in order to
lift the steer wheels from the ground.
d. Position the LIFT control to DOWN and hold until
the steer wheels rise from the ground; it may be
necessary to feather the LIFT control to maintain
wheel elevation.
e. Position EXTENDABLE AXLE/STEER switch
located on platform control console to RIGHT,
until axles are fully retracted.
f. On machines with fixed axles, align steer wheels
and insert tie rod lock pins and steer cylinder
pin. Install axle lock pins.
g. Position LIFT control to UP to lower the
machine; elevate the boom sufficiently and repo-
sition the boom over the drive wheel end of the
machine.
NOTE: On machines equipped with Soft Touch Proximity
System, the operator must press and hold the over-
ride button on the front of the control box in order to
lift the drive wheels from the ground.
h. Position LIFT control to DOWN and hold until the
drive wheels rise from the ground; it may be nec-
essary to feather the LIFT control to maintain
drive wheel elevation.
i. Position EXTENDABLE AXLES/STEER switch,
on platform control console, to RIGHT, until axles
are fully retracted. On machines with fixed axles,
install axle lock pins.
j. Position LIFT control to UP to lower the machine
drive wheels; position STEER/AXLES valve to
STEER.
k. On machines with fixed axles, cycle the steer
system in both directions to ensure the tie rods
are properly locked.
Machines With Jacks
NOTE: For machines equipped with a front jack only, refer to
the instructions under Machines Without Jacks to
extend the rear axle.
1. Position STEER/AXLES valve, located adjacent to
right front wheel, to AXLES.
2. Position the Jack/Steer/Axles Select switch on the
Platform control console to JACK.
3. On machines with fixed axles, remove the axle lock
pins on the applicable axle. If extending the steer
axle, also remove the tie rod lock pins and steer cyl-
inder lock pin.
4. Position the Jack Select Switch to either FRONT
JACK or REAR JACK and position the JACK control
switch to down and hold until the wheels on the
selected axle rise from the ground.
5. Position the Jack/Steer/Axles Select switch to
AXLES. Then, position the Steer/Axles/Jack control
switch to left until the axles are fully extended. On
machines with fixed axles, install axle lock pins. If
extending the steer axle, also install the tie rod lock
pins and steer cylinder lock pin.
ENSURE THE JACK IS FULLY RETRACTED BEFORE OPERATING
THE MACHINE. FAILURE TO DO SO COULD RESULT IN DAMAGE
TO THE MACHINE.
6. Position the JACK control to the up position to lower
the machine. Ensure the jack is fully retracted before
operating the machine.
7. Repeat steps 2 thru 6 and extend the opposite axle.
8. Position the STEER/AXLES valve to STEER.
9. On machines with fixed axles, cycle the steer system
in both directions to ensure the tie rod and steer cyl-
inder are properly locked.