JLG 120-SXJ ANSI Operator Manual - Manual (Page 25)

SECTION 2 - PREPARATION AND INSPECTION
3121104 – JLG Lift – 2-9
2.5 DAILY FUNCTIONAL CHECK
THE LOAD MANAGEMENT SYSTEM AND THE AXLES (PROPER
EXTENSION AND RETRACTION) MUST BE CHECKED PRIOR TO
ANY OTHER SYSTEMS AND/OR FUNCTIONS.
A functional check of all systems should be performed,
once the walk-around inspection is complete, in an area
free of overhead and ground level obstructions. First,
using the ground controls, check all functions controlled
by the ground controls. Next, using the platform controls,
check all functions controlled by the platform controls.
TO AVOID SERIOUS INJURY, DO NOT OPERATE MACHINE IF ANY
CONTROL LEVERS OR TOGGLE SWITCHES CONTROLLING
PLATFORM MOVEMENTS DO NOT RETURN TO THE OFF OR NEU-
TRAL POSITION WHEN RELEASED.
TO AVOID COLLISION AND INJURY IF PLATFORM DOES NOT
STOP WHEN A CONTROL SWITCH OR LEVER IS RELEASED,
REMOVE FOOT FROM FOOTSWITCH OR USE EMERGENCY STOP
TO STOP THE MACHINE.
NOTE: Perform checks from ground controls first, where
applicable, then from platform controls.
1. Axles, Extending and Retracting (Machines without
Jacks).
a. From the platform controls, activate the machine
hydraulic system and position the boom over
the drive wheel end of the machine.
b. Position the Steer Select switch to the Front
Steer position. The boom must be retracted
within the limits of the 10 foot cutout switch and
below horizontal.
D O N O T U S E E X TE N D - A - R E A C H ( IF E QU I P P E D ) TO LI FT
MACHINE WHEN EXTENDING AND RETRACTING AXLES.
c. Position LIFT control to DOWN and hold until
drive wheels rise from the ground; it may be nec-
essary to feather the lift control to maintain drive
wheel elevation.
d. Push and hold the Jack/Steer/Axle Select switch
in the Axle position.
e. Position Drive/Steer/Jacks/Axle controller
located on platform control console to Extend
Axles until axles are fully extended and the Axles
Set light is on.
f. If the light does not illuminate when the axles are
fully extended, contact a qualified service techni-
cian before continuing operation.
g. Position LIFT control to UP to lower the
machine; elevate the boom sufficiently and repo-
sition the boom over the steer wheel end of the
machine.
h. Repeat steps a thru f for the opposite axle.
Axles, Extending and Retracting (Machines with
Jacks)
a. From the platform controls, activate the machine
hydraulic system and position the boom over
the drive wheel end of the machine.
b. Position the Steer Select switch to the Front
Steer position. The boom must be retracted
within the limits of the 10 foot cutout switch and
below horizontal.
c. Position the Jack Select switch to the desired
jack.
d. Push and hold the Jack/Steer/Axle Select switch
in the Jack position.
e. Position Drive/Steer/Jacks/Axle controller
located on platform control console to Extend
Jack position until the jack is fully extended.
f. Push and hold the Jack/Steer/Axle Select switch
in the Axle position.
g. Position Drive/Steer/Jacks/Axle controller
located on platform control console to Extend
Axles until axles are fully extended and the Axles
Set light is on.
h. If the light does not illuminate when both axles
are fully extended, contact a qualified service
technician before continuing operation.
NOTE: If no function is selected and the power is still on, the
jack will automatically retract after a period of 7 sec-
onds.
2. Load Management System.
a. With the boom fully retracted, raise the boom to
horizontal.
b. Position the toggle switch located on the right
side of the ground control box to the P position
and hold.
c. Extend the boom until it stops. The boom must
stop on the white band on the mid boom sec-
tion. Release the toggle switch.