Function check, Function check -5 – JLG M450 Operator Manual User Manual
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SECTION 2 - USER RESPONSIBILITIES, MACHINE PREPARATION, AND INSPECTION
3121210
– JLG Lift –
2-5
Function Check
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 func-
tions controlled by the platform controls.
TO AVOID SERIOUS INJURY, DO NOT OPERATE MACHINE IF ANY CON-
TROL LEVERS OR TOGGLE SWITCHES CONTROLLING PLATFORM
MOVEMENTS DO NOT RETURN TO THE OFF POSITION WHEN
RELEASED.
TO AVOID A 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 MACHINE.
1. Check boom limit switches. Raise and lower the Lower
Boom. Check for smooth operation.
NOTE: Perform checks from ground controls first, then from plat-
form controls.
2. Raise, extend, retract, and lower the Upper Boom.
Check for smooth operation.
3. If tower boom does not rest on stop with machine in the
stowed position, this indicates upright is out of plumb.
4. Telescope boom IN and OUT several cycles at various
degrees of elevation lengths. Check for smooth tele-
scope operation.
5. Swing turntable to LEFT and RIGHT a minimum of 45
degrees. Check for smooth motion.
6. Check the chassis out of level indicator located on the
platform control console by driving, with the machine in
level position, up a suitable ramp of at least 6° slope.
Check the out of level alarm, with the machine on the
ramp, raise the upper boom until it is parallel with the
chassis. DO NOT RAISE ABOVE THE PARALLEL POSI-
TION. If the light does not illuminate, return the machine
to a level surface, shut down the machine, and contact a
qualified technician before resuming operation.
For units equipped with optional tilt cutout, verify that the
drive function is cutout when the boom is elevated and
tilt alarm is activated.