JLG LSS Boom - Manual (Page 48)

SECTION 3 - SERVICE - ELECTRIC POWERED BOOM LIFTS
3-8 – JLG Lift – 3124287
Testing & Evaluation
Refer to the Troubleshooting section of this manual if the
Load Sensing System fails to meet these guidelines.
1. Plug the JLG Analyzer into the LSS Module. Do not
confuse the Host Control System and LSS Module’s
Analyzer Connections. The Host Control System’s
connection is mounted beneath the Platform Con-
sole Box, and the LSS Module’s connection hangs
from a short harness near the module.
2. Level the Platform. The platform should be approxi-
mately level for analysis, or the guidelines below will
not be applicable. Level the platform from Ground
Control (if necessary) to within +5 degrees.
3. Observe the Empty Platform Weight. Proceed to the
DIAGNOSTICS, PLTLOAD sub-menu and observe
the measured platform load. All tools, debris, and
customer-installed devices shall be removed during
evaluation. Ideally, the PLTLOAD should be zero but
can vary +15lbs (± 7kg). Further, the reading
should be stable and should not vary by more than
+2lbs (±1kg) (unless there is heavy influence from
wind or vibration).
4. Use the Technician’s Weight to Evaluate. The techni-
cian should enter the platform and record the PLT-
LOAD reading while standing in the center of the
platform, and then each corner. The average of the
readings should be the estimated weight of the tech-
nician. The range of the readings should be no more
than 20lbs (9kg) (max PLTLOAD reading – min PLT-
LOAD reading).
5. Confirm Host Control System Warnings and Inter-
locks. Using the vehicle’s keyswitch, select Platform
Mode and power-up. Ensure that all controls are
functional and the Load Sensing System’s Overload
Visual and Audible Warnings are not active. Simu-
late an Overload by unplugging the Shear Beam
Load Cell connected to J5 on the LSS Module (the
most easily accessed). The Overload Visual Warning
in the platform should flash, and the Audible Warn-
ing (at Platform and Ground) should sound for 5
seconds On, and 2 seconds Off. All controls should
be prevented. Install the disconnected Shear Beam
Load Cell back in J5 on the LSS Module. The Over-
load Visual and Audible Warnings should cease and
normal control function should return. Switch the
vehicle’s keyswitch to Ground Mode and repeat the
above procedure. The Overload Visual Warning at
the Ground Controls should flash, and the Audible
Warning (at Platform and Ground) should sound for
5 seconds On, 2 seconds Off. However, the controls
should remain functional (if the Host Controls Sys-
tem’s MACHINE SETUP, LOAD is set to “2=CUTOUT
PLT”. If set to “3=CUTOUT ALL”, then Ground Con-
trols will be prevented as in the platform). Re-fit the
Shear Beam Load Cell to J5 on the LSS Module and
carefully tighten by hand, and then with a small pair
of locking pliers to seat the O-ring seal.
6. Confirm Load Sensing System Performance with
Calibrated Weights. Operate the vehicle from
Ground Control and place the boom in the transport
position (fully stowed) for safety. Plug the JLG Ana-
lyzer into the LSS Module’s connection and proceed
to the DIAGNOSTICS, PLTLOAD display. Place
500lbs (230kg) in the platform and ensure that PLT-
LOAD is with +5% of the actual weight.