JLG 120HX Operator Manual User Manual
Page 53
SECTION 4 - MACHINE OPERATION
3120818
– JLG Lift –
4-3
4.5
AXLES
NOTE: To extend or retract jacks or to extend or retract the
axles, the boom must be below horizontal and not
extended more than 3 meters. The machine must
also be on a flat, level surface.
To Extend the Axles
1.
Remove the pins from the front steer cylinder and tie
rod. Be sure the SELECT SWITCH is set to
GROUND.
2.
From the controls at the front axle, with the engine
running, push the axle jack control switch down to
raise the axle.
3.
When the tires are off the ground, push the axle
extend switch to the left to extend the axle. When the
axle is fully extended, return the pins to the front
steer cylinder and tie rod.
4.
Repeat steps 1 thru 3 for the for the rear axle. The
machine is now ready for boom operations.
To Retract the Axles
1.
Remove the pins from the front steer cylinder and tie
rod. Be sure the SELECT SWITCH is set to
GROUND.
2.
From the controls at the front axle, with the engine
running, push the axle jack control switch down to
raise the axle.
3.
Swing the steer cylinder clear of the axle tube before
retracting the axle.
4.
When the tires are off the ground, push the axle
extend switch to the right to retract the axle. When
the axle is fully retracted, align the steer cylinder with
the mounting bracket and return the pins to the front
steer cylinder and tie rod.
5.
Repeat steps 1 thru 4 for the for the rear axle.
4.6
PARKING AND STOWING
Park and stow machine as follows:
1.
Park machine in travel position; boom lowered over
rear, all access panels and doors closed and
secured, ignition off, turntable locked.
2.
Check that brakes hold machine in position.
3.
Chock wheels front and rear.
4.
Turn off SELECT SWITCH and remove key.
4.7
PLATFORM
Loading From Ground Level
1.
Position chassis on a smooth, firm and level surface.
2.
If total load (personnel, tools and supplies) is less
then rated capacity, distribute load uniformly on plat-
form floor and proceed to work position.
Loading From Positions Above Ground Level
Before loading weight to platform above ground level:
1.
Determine what the total rated capacity weight will
be after additional weight is loaded (personnel, tools
and supplies).
2.
If total weight in platform will be less then rated
capacity, proceed with adding weight.
Platform Level Adjustment
1.
Leveling UP. Depress footswitch to raise platform,
position PLATFORM LEVEL control switch UP and
hold until platform is level.
2.
Leveling DOWN. Depress footswitch to lower plat-
form, position PLATFORM LEVEL control switch to
DOWN and hold until platform is level.
Platform Rotation
1.
Depress footswitch to rotate platform to the left,
PLATFORM ROTATE control is positioned to the
LEFT and held until desired position is reached.
2.
Depress footswitch to rotate platform to the right,
PLATFORM ROTATE control is positioned to the
RIGHT and held until desired position is reached.
Updated 12/98