JLG 660SJ Operator Manual - Manual (Page 28)

SECTION 2 - USER RESPONSIBILITIES, MACHINE PREPARATION, AND INSPECTION
2-6 – JLG Lift – 3121205
2.3 LIMIT SWITCH FUNCTIONAL CHECK
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, then from plat-
form controls.
1. Operate machine from ground control.
NOTE: For adjustments see Service Manual - Limit Switch Adjust-
ments.
2. Check elevation limit switch as follows:
a. Lift boom up to 2 degrees to 7 degrees above hori-
zontal. The switch should activate at this point.
b. Lift boom down to 2.5 degrees to 7.5 degrees
below horizontal. The switch should reset at this
point.
3. Raise main boom, extend and retract telescope. Check
for delayed movement of fly section, indicating loose
cables.
4. Swing turntable to LEFT and RIGHT a minimum of 45
degrees. Check for smooth motion.
NOTE: Step 5 is only applicable for machines with an external tilt
sensor.
5. With the aid of an assistant to monitor the CHASSIS
OUT OF LEVEL indicator light on the platform control
console, manually activate the indicator light by com-
pressing 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 6 is applicable for machines with an internal tilt sen-
sor.
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 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 surface, shut down the machine, and contact a
qualified technician before resuming operation.