JLG 80HX_HX+6 Operator Manual - Manual (Page 27)

SECTION 2 - PREPARATION AND INSPECTION
2-10 – JLG Lift – 3120890
2.5 DAILY FUNCTIONAL CHECK
PROPER AXLE EXTENSION MUST BE CHECKED AND VERIFIED
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 MOVEMENT 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 the ground controls first, where
applicable, then from the platform controls.
1. Extendable Axles.
Prior to extending the axles, verify that the boom will
not elevate above horizontal and that it will not
extend more than 10 feet (3.0 m). For machines
equipped with red Axles Set or red Axles Not Set
indicator lamps, at the platform and/or the ground
controls, verify the lamps illuminate until the axles
are properly extended and locked. For machines
equipped with green Axles Set indicator lamps at the
platform and/or the ground controls, the lamps
should not illuminate until the axles are extended
and locked.
DO NOT OPERATE THE MACHINE IF THE BOOM ELEVATES
ABOVE HORIZONTAL OR EXTENDS BEYOND TEN FEET WITH-
OUT FULLY EXTENDING AND LOCKING THE AXLES.
Check axle operation as follows:
NOTE: Fixed axle machines have retaining pins for the
axles, steer cylinders, and tie rods. Machines
equipped with oscillating axles do not have these
retaining pins and all extending and retracting opera-
tions are performed from the platform without aid of
an assistant.
Machines Without Jacks
a. Position the boom over the drive wheel end of
machine. Position STEER/AXLES valve, located
adjacent to the right front wheel, to AXLES.
Remove axle lock pins.
D O N O T U S E E X T E N D - A - R E A C H ( I F E Q U I P P E D ) TO L I FT
MACHINE WHEN EXTENDING AND RETRACTING AXLES.
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.
b. 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.
c. With the aid of an assistant, position the
EXTENDABLE AXLE/STEER switch located on
the platform control console to LEFT until axles
are fully extended. On machines with fixed axles,
install axle lock pins.
d. 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.
e. Repeat steps b thru d for the steer axle. On
machines with fixed axles, remove the tie rod
lock pins, steer cylinder lock pin, and axle lock
pins.
f. Position STEER/AXLES valve to STEER.
g. On machines with fixed axles, cycle steer sys-
tem in both directions to ensure tie rod and steer
cylinder are properly locked.
h. For machines equipped with a green Axles Set
Indicator lamp, verify proper operation of the
lamp at the platform and ground controls.
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.
a. Position STEER/AXLES valve, located adjacent
to the right front wheel, to AXLES.
b. Position Jack/Steer/Axles select switch on
the platform control console to JACK.
c. 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 cylinder lock pin.
d. Position the Jack Select Switch to either FRONT
JACK or REAR JACK and position the JACK