Functional check, Functional check -6 – JLG 460SJ Operator Manual User Manual
Page 32
SECTION 2 - USER RESPONSIBILITIES, MACHINE PREPARATION, AND INSPECTION
2-6
– JLG Lift –
3121216
Functional Check
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.
1.
Telescope boom IN and OUT several cycles at various
degrees of elevation lengths. Check for smooth telescope
operation.
2.
Swing turntable to LEFT and RIGHT a minimum of 45
degrees. Check for smooth motion.
NOTE:
Step 3 is only applicable for machines prior to S/N 0300140365.
3.
Check the oscillating axle valve (if equipped) under the
turntable at the top front of frame. Observe that the valve
plunger is depressed when turntable is positioned forward,
and centered. Swing the turntable until bracket is past the
valve. The plunger should be fully extended.
NOTE:
Step 4 is only applicable for machines prior to S/N 61718.
4.
With the aid of an assistant to monitor the CHASSIS OUT OF
LEVEL indicator light on the platform control console, man-
ually activate the indicator light by compressing any one of
the three tilt indicator mounting springs. If the light does
not illuminate, shut down machine and contact a qualified
service technician before continuing operation.
NOTE:
Step 5 is applicable for machines built from S/N 61718 to present.
5.
Check the chassis out of level indicator located on the plat-
form control console by driving, with the machine in level
position, up a suitable ramp of at least 5° slope. Check the
out of level indicator, with the machine on the ramp. If the
light does not illuminate, return the machine to a level sur-
face, shut down the machine, and contact a qualified techni-
cian before resuming operation.
6.
Check that platform self-leveling system functions properly
during raising and lowering of boom.
7.
Check rotator for smooth operation and assure platform
will rotate 90 degrees in both directions from centerline of
boom.
8.
Drive forward and reverse; check for proper operation.
9.
Check boom horizontal limit switches to see that they are
operable and not damaged. Raise and lower Boom. Check
for smooth operation.
NOTE:
When the boom is raised above horizontal, high drive speed is
cut out.
10.
Steer left and right; check for proper operation.