JLG LSS Scissors - Manual (Page 53)

SECTION 6 - SERVICE - (RS)
3124288 – JLG Lift – 6-1
SECTION 6. SERVICE - (RS)
6.1 DESCRIPTION (RS)
The platform load sensing system is intended to prevent
machine operation in the event that the platform is over-
loaded. Machine operation does not return until the plat-
form overload is removed. If the platform load sensing
system is equipped the machine will include 3 additional
components, 2 pressure transducers and 1 angle sensor.
The pressure transducers, which are located at the barrel
end of the lift cylinder, (See Figure 6-1. and Figure 6-2.) are
intended to correlate hydraulic fluid pressure to the load
placed in the platform. The angle sensor, located at the
bottom of the arm stack to the rear of the 10RS, and
underneath the platform at the rear of the machine on the
6RS, (See Figure 6-3.) is intended to correlate machine
elevation with hydraulic fluid pressure as measured by the
pressure transducers.
NOTE: JLG specifications require that this procedure be
performed every 500 machine hours or 6 months,
whichever occurs first. Calibrating the platform load
sensing system regularly is essential to safe machine
operation. Continuing to operate a machine without
calibrating at the recommended specifications could
compromise machine stability resulting in a
machine tip-over.
6.2 CALIBRATION (RS)
The load sensing system cannot be calibrated without first
calibrating the machines Angle Sensor. The load sensing
system will not measure load at or below the elevation
switch trip point.
Angle Sensor Calibration Procedure (RS)
1. Ensure the batteries are fully charged and the
hydraulic fluid level is acceptable.
2. Park the vehicle on a level surface. The platform
should be fully stowed and level within +/- 0.5
degrees (both directions).
3. Remove the orange panel on the ground control key
switch side of the machine.
4. Disconnect the MDI display and connect the JLG
Analyzer.
5. Navigate to the ACCESS LEVEL menu on the Ana-
lyzer and enter the Access Level 1 code.
6. Execute a Angle Calibration via the JLG Analyzer.
Proceed to the Analyzer's CALIBRATION top level
menu and press ENTER. Navigate to the ANGLE
submenu and press ENTER. Press ESC to abort a
calibration or ENTER to calibrate. If successful the
Analyzer will display COMPLETE!. If unsuccessful, a
message will be displayed that will help lead to a
resolution (reference the Troubleshooting section of
this manual). Press ESC to return to the top level
menu.
Platform Load Sensing System Calibration
Procedure (RS)
1. If the Angle Sensor has not been calibrated refer to
the Angle Sensor Calibration Procedure first!
2. Ensure the batteries are fully charged and the
hydraulic fluid level is acceptable.
3. Park the vehicle on a level surface. The platform
should be fully stowed and level within +/- 0.5
degrees (both directions).
4. Ensure the temperature is greater than 32 degrees
Fahrenheit.
5. Place weight corresponding to 110% of the
machines rated load in the center of the platform.
Secure the weight to the platform. See the chart
below to determine the correct weight for calibration
on each machine.
6. Remove the orange panel on the ground control key
switch side of the machine.
7. Disconnect the MDI display and connect the JLG
Analyzer.
8. Navigate to the ACCESS LEVEL menu on the Ana-
lyzer and enter the Access Level 1 code.
9. Execute a Load Calibration via the JLG Analyzer.
Proceed to the Analyzer's CALIBRATION top level
menu and press ENTER. Navigate to the LOAD sub-
menu and press ENTER. Press ESC to abort a cali-
bration or ENTER to calibrate. If successful the
Analyzer will display COMPLETE!. If unsuccessful, a
message will be displayed that will help lead to a
resolution (reference the Troubleshooting section of
this manual). Press ESC to return to the top level
menu.
Table 6-1. Platform Calibration Weight - RS
MACHINE CALIBRATION WEIGHT
1932RS/6RS 550 lbs. (250 Kg)
3248RS/10RS 775 lbs. (352 Kg)