JLG LSS Boom - Manual (Page 31)

SECTION 2 - SERVICE - ENGINE POWERED BOOM LIFTS
3124287 – JLG Lift – 2-9
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. Start the vehicle’s engine and
ensure that all controls are functional and the Load
Sensing System’s Overload Visual and Audible
Warnings are not active. Simulate an Overload by
unplugging the Shear Beam Load Cell connected to
J5 on the LSS Module (the most easily accessed).
The Overload Visual Warning should flash, and the
Audible Warning (at Platform and Ground) should
sound for 5 seconds On, and 2 seconds Off. With
the engine running, all control should be prevented.
Cycle the Platform EMS to stop the engine and then
power-up again. The Overload Visual and Audible
Warning should continue. Confirm that controls are
responsive when using the Auxiliary Power Unit for
emergency movement. Install the disconnected
Shear Beam Load Cell back in J5 on the LSS Mod-
ule. The Overload 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 Over-
load 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
when using the engine and the Auxiliary Power Unit
(if the Host Controls System’s MACHINE SETUP,
LOAD is set to “2=CUTOUT PLT”. If set to “3=CUT-
OUT ALL”, then Ground Controls will be prevented
when using the engine 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 Host Control System Capacity Indication
(optional for vehicles with Dual Capacity Ratings).
For vehicles equipped with a Capacity Select switch
on the Platform Console Box, it is necessary to
examine an additional interface between the Load
Sensing System and the Host Control System.
Using the vehicle keyswitch, select Platform Mode
and power-up. If necessary, put the boom in the
transport position (completely stowed) and center
the Jib Plus (if equipped). Place the Capacity Select
switch in the 500lbs (230kg)position and ensure that
the proper indicator illuminates on the Platform Con-
sole Box. Plug the JLG Analyzer into the LSS Mod-
ule’s Analyzer connection and proceed to the
DIAGNOSTICS, SYSTEM submenu. Ensure that the
750# (340kg) CAPACITY and 1000# (450kg)
CAPACITY displays indicate OFF. Place the Capacity
Select switch in the 750lbs/1000lbs (340kg/450kg)
position (if so equipped) and ensure that the proper
indicator illuminates on the Platform Console Box
(but does not flash). For vehicles with 750lbs
(340kg) capacity, ensure that the 750# (340kg)
CAPACITY display indicates ON but the 1000#
(450kg) CAPACITY indicates OFF. For vehicles with
1000lbs capacity, ensure that the 750# (340kg)
CAPACITY display indicates OFF but the 1000#
CAPACITY indicates ON.
7. 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. For Dual
Capacity vehicles, do the same for the alternate
capacity (750LBS or 1000LBS [340kg or 450kg]).