This section contains the general safety precautions
which must be observed during maintenance of the aerial
platform. It is of utmost importance that maintenance personnel pay strict attention to these warnings and precautions to avoid possible injury to themselves or others, or
damage to the equipment. A maintenance program must
be followed to ensure that the machine is safe to operate.
MODIFICATION OF THE MACHINE WITHOUT CERTIFICATION BY
A RESPONSIBLE AUTHORITY THAT THE MACHINE IS AT LEAST
AS SAFE AS ORIGINALLY MANUFACTURED, IS A SAFETY VIOLATION.
The specific precautions to be observed during maintenance are inserted at the appropriate point in the manual.
These precautions are, for the most part, those that apply
when servicing hydraulic and larger machine component
parts.
Your safety, and that of others, is the first consideration
when engaging in the maintenance of equipment. Always
be conscious of weight. Never attempt to move heavy
parts without the aid of a mechanical device. Do not allow
heavy objects to rest in an unstable position. When raising
a portion of the equipment, ensure that adequate support
is provided.
SINCE THE MACHINE MANUFACTURER HAS NO DIRECT CONTROL OVER THE FIELD INSPECTION AND MAINTENANCE,
SAFETY IN THIS AREA IS THE RESPONSIBILITY OF THE OWNER/
OPERATOR.
CMAINTENANCE
FAILURE TO COMPLY WITH SAFETY PRECAUTIONS LISTED IN
THIS SECTION MAY RESULT IN MACHINE DAMAGE, PERSONNEL
INJURY OR DEATH AND IS A SAFETY VIOLATION.
• REMOVE ALL RINGS, WATCHES AND JEWELRY
WHEN PERFORMING ANY MAINTENANCE.
• DO NOT WEAR LONG HAIR UNRESTRAINED, OR
LOOSE-FITTING CLOTHING AND NECKTIES WHICH
ARE APT TO BECOME CAUGHT ON OR ENTANGLED
IN EQUIPMENT.
• OBSERVE AND OBEY ALL WARNINGS AND CAUTIONS ON MACHINE AND IN SERVICEMANUAL.
• KEEP OIL, GREASE, WATER, ETC. WIPED FROM
STANDING SURFACES AND HAND HOLDS.
• NEVER WORK UNDER AN ELEVATED SIZZOR UNTIL
PLATFORM HAS BEEN SAFELY RESTRAINED FROM
ANY MOVEMENT BY BLOCKING OR OVERHEAD
SLING, OR BOOM SAFETY PROP HAS BEEN
ENGAGED.
• BEFORE MAKING ADJUSTMENTS, LUBRICATING OR
PERFORMING ANY OTHER MAINTENANCE, SHUT
OFF ALL POWER CONTROLS.
•BATTERY SHOULD ALWAYS BE DISCONNECTEDDURING REPLACEMENT OF ELECTRICAL COMPONENTS.
• KEEP ALL SUPPORT EQUIPMENT AND ATTACH-
BHYDRAULIC SYSTEM SAFETY
It should be noted that the machines hydraulic systems
operate at extremely high, potentially dangerous pressures. Every effort should be made to relieve any system
pressure prior to disconnecting or removing any portion of
the system.
MENTS STOWED IN THEIR PROPER PLACE.
• USE ONLY APPROVED, NONFLAMMABLE CLEANING
SOLVENTS.
3124288– JLG Lift –A-1
INTRODUCTION
REVISION LOG
Original Issue- June 13, 2003
Revised- July 28, 2003
Revised- August 11, 2003
Revised- September 12, 2003
Revised - March 1, 2004
Revised - October 15, 2004
Revised - July 15, 2006
Revised - October 26, 2007
Revised - June 4, 2010
Revised - March 31, 2011
Revised - March 1, 2012
Revised- August 11, 2012
Revised- January 30, 2013
Revised - July 26, 2013
A-2– JLG Lift –3124288
TABLE OF CONTENTS
TABLE OF CONTENTS
SUBJECT - SECTION, PARAGRAPHPAGE NO.
SECTION A - INTRODUCTION - MAINTENANCE SAFETY PRECAUTIONS
NOTE: This manual is intended as a supplement to the indi-
vidual machine’s Operators and Safety Manual.
1.1INTRODUCTION & OPERATION
NOTE: It is the responsibility of the owner/user/operator/les-
sor/lessee to read & understand this manual and the
machine Operators & Safety Manual and to prevent
overloading the platform. Do not operate a machine
with a disconnected or inoperative Load Sensing
System.
The JLG-designed Load Sensing System (LSS) measures
platform load. If the actual platform load exceeds the
selected Rated Load, the following will occur:
1. The Overload Visual Warning Indicator will flash at
the selected control position (platform or ground).
2. The Platform and Ground Alarms will sound 5 seconds On, and 2 seconds Off.
3. All normal movement will be prevented from the
platform control position (optional - ground control
functions may be prevented).
4. Further movement is permitted by:
a. Removing the excess platform load until actual
platform load is less than Rated Load.
b. By an authorized person at the ground control
position (optional - ground control functions
may be prevented).
THE LOAD SENSING SYSTEM MUST BE CALIBRATED WHEN ONE
OR MORE OF THE FOLLOWING CONDITIONS OCCUR:
a. LSS System initial installation
b. LSS Module replacement
c. LSS Sensor removal or replacement
d. Addition or removal of certain platform mounted
accessories. (Refer to Calibration in Section 2)
e. Platform is removed, replaced, repaired or
shows evidence of impact.
THE LOAD SENSING SYSTEM REQUIRES PERIODIC FUNCTION
VERIFICATION NOT TO EXCEED 6 MONTHS FROM PREVIOUS
VERIFICATION. REFER TO TESTING & EVALUATION IN SECTION
2.
Calibration of the Load Sensing System is performed by
connecting the JLG Analyzer (Analyzer Kit, JLG part no.
2901443). All calibration procedures are menu driven
through the use of the Analyzer.
1.2USING THE ANALYZER
With the machine power on and the analyzer connected
properly, the analyzer will display the following:
HELP:
PRESS ENTER
At this point, using the RIGHT and LEFT arrow keys, you
can move between the top level menu items. To select a
displayed menu item, press ENTER. To cancel a selected
menu item, press ESC.; then you will be able to scroll
using the right and left arrow keys to select a different
menu item.
If you press ENTER at the HELP: PRESS ENTER display
and there are no faults, the Analyzer will display EVERY-
THING OK. In the event of a fault, the Analyzer will display
a Help Message.
If ENTER is pressed again, the Analyzer will display
LOGGED HELP, a record of the last 16 faults. Use the left
and right arrow keys to scroll through the fault log. To
return to the top level menu, press the ESC key twice.
When a top level menu entry is selected, a new set of
menu items will be displayed.
Pressing ENTER while viewing any of the above menu
entries will display additional sub-menus. Typically, the
sub-menu is where parameter information is displayed or
changed. You may only view Personality settings while in
Access Level 2. Access Level 1 is required to change Personality settings and calibrate.
3124288– JLG Lift –1-1
SECTION 1 - ANALYZER OPERATION - ALL
The ESC key may be used to leave a sub-menu at any
time.
1.3CHANGING THE ACCESS LEVEL OF THE
HAND HELD ANALYZER
When the analyzer is first connected, you will be in access
level 2 which enables you to only view most settings
which cannot be changed until you enter a password to
advance to a lower level. This ensures that a setting cannot be accidentally altered. To change the access level,
the correct password must be entered. To enter the password, scroll to the ACCESS LEVEL menu. For example:
Once the correct password is displayed, press ENTER.
The access level should display the following, if the password was entered correctly:
MENU:
ACCESS LEVEL 1
Repeat the above steps if the correct access level is not
displayed or you can not adjust the personality settings.
MENU:
ACCESS LEVEL 2
Press ENTER to select the ACCESS LEVEL menu.
Using the UP or DOWN arrow keys, enter the first digit of
the password, 3.
Then using the RIGHT arrow key, position the cursor to
the right one space to enter the second digit of the password.
Use the UP or DOWN arrow key to enter the second digit
of the password which is 33271.
Continue using the arrow keys until all the remaining digits
of the password is shown.
1-2– JLG Lift –3124288
1.4VIEWING & ADJUSTING PARAMETERS
PERS O NALITIES:
DRI V E A CCEL 3 . 0 s
USING THE HAND HELD ANALYZER
Once you have gained access to level 1, and a personality
item is selected, press the UP or DOWN arrow keys to
adjust its value, for example:
SECTION 1 - ANALYZER OPERATION - ALL
There will be a minimum and maximum for the value to
ensure efficient operation. The Value will not increase if
the UP arrow is pressed when at the maximum value nor
will the value decrease if the DOWN arrow is pressed and
the value is at the minimum value for any particular personality. If the value does not change when pressing the
up and down arrows, check the access level to ensure
you are at Access Level 1.
PERSONALITIES:
OVR DEBNCE 3.0s
3124288– JLG Lift –1-3
SECTION 1 - ANALYZER OPERATION - ALL
NOTES:
1-4– JLG Lift –3124288
SECTION 2 - OPERATION - (LE, MRT, RTS)
SECTION 2. OPERATION - (LE, MRT, RTS)
2.1CONNECTING THE JLG CONTROL
SYSTEM ANALYZER (LE, MRT & RTS)
THE LOAD SENSING SYSTEM MODULE HAS AN INDEPENDENT
ANALYZER CONNECTION LOCATED NEAR THE MODULE. DO
NOT CONFUSE IT WITH THE ANALYZER CONNECTION FROM
THE HOST CONTROL SYSTEM.
1. Connect the cable supplied with the Analyzer to the
LSS Module located beneath the platform and connect the remaining end of the cable to the analyzer.
NOTE: The cable has a four-pin connector at each end of
the cable; The cable cannot be connected backwards.
2. Power-up the Control System by turning the key to
the Platform or Ground position and pulling both
emergency stop buttons.
Table 2-1. LSS Fault Codes (LE, MRT and RTS)
Help/Logged
Message
Everything OKLED ON The "Normal" Help Message
<MIN CALCalibration attempt Unsuccessful, Empty Platform appears to weigh too little. Improper Model Selection (Machine
>MAX CALCalibration attempt Unsuccessful, Empty Platform appears to weigh too much. This situation has the same root causes
BATT TOO LOW4/1Incoming Supply Voltage <9.0 Vdc. The control system’s battery voltage is too low due to excessive electrical load or
BATT TOO HIGH4/4Incoming Supply Voltage >34.0 Vdc. The control system’s battery voltage is too high. This may be due to over-charg-
C E L L # 1 E R R O R8 / 1C e l l # 1 ’ s B r i dg e < 2 V, > 3 V, o r c o u l d n o t r e a d C e l l #1’s Internal Memory. This situation indicates damage to the sensor
C E L L # 2 E R R O R8 / 2C e l l # 2 ’ s B r i dg e < 2 V, > 3 V, o r c o u l d n o t r e a d C e l l #2’s Internal Memory. This situation indicates damage to the sensor
C E L L # 3 E R R O R8 / 3C e l l # 3 ’ s B r i dg e < 2 V, > 3 V, o r c o u l d n o t r e a d C e l l #3’s Internal Memory. This situation indicates damage to the sensor
C E L L # 4 E R R O R8 / 4C e l l # 4 ’ s B r i dg e < 2 V, > 3 V, o r c o u l d n o t r e a d C e l l #4’s Internal Memory. This situation indicates damage to the sensor
WATCHDOG RST9/1Microprocessor’s Watchdog Timer Tr iggered. This is an indication that the LSS Module has been exposed to excessive
EEPROM ERROR9/2Memor y used to retain Personality/Machine Setup/Calibration has been corrupted and must be reset by verifying all
NO CAL9/3Calibration has not been successfully completed. A new LSS Module will display this message until properly cali-
Flash
Code
Setup) may cause the LSS Module to expect the wrong Empty Platform Weight. This also may be caused by a damaged
sensor or associated wiring. Finally, this condition may occur if mechanical interference between the platform and support structure exists (all weight must transfer through sensors).
as the "<MIN CAL" Fault Message.
discharge.
ing or improper charger operation.
or its wiring.
or its wiring.
or its wiring.
or its wiring.
electrical noise, or has experienced a hardware difficulty.
entries and re-calibrating.
brated.
2.2HELP MENU & FAULT CODES (LE, MRT
& RTS)
The Help Menu is a troubleshooting tool to communicate
detected System Faults to the technician. The following
table documents the Faults for the Load Sensing System.
To access the Help Menu, use the LEFT and RIGHT arrow
keys to select HELP: PRESS ENTER from the Top Level
Menu. Press the ENTER key to view the menu.
When accessing the Help Menu, the JLG Analyzer will display EVERYTHING OK if the platform is not overloaded
and no difficulties are detected. Otherwise, the JLG Analyzer will display OVERLOADED.
In the event of difficulty, the user can press ENTER again
to display Logged Help, which is a record of the last 16
Fault Messages. The following table lists each Help/
Logged Message, the Flash Code (for each Fault, the
module will flash the two-digit code on its LED) triggered
by the Fault, and a Description of the Situation (cause).
Description of Situation
3124288– JLG Lift –2-1
SECTION 2 - OPERATION - (LE, MRT, RTS)
Table 2-1. LSS Fault Codes (LE, MRT and RTS)
Help/Logged
Message
INTERNAL ERR9/9Pin excitation <4.25 V. The sensors may be excessively loading the excitation supply, or the LSS Module may have
Flash
Code
hardware difficulty.
High Side Driver Error. The load attached to OUT1 or OUT2 is shor ted to battery or ground and has been detected by the
LSS module.
DRDY Interrupt from A/D missing. This may indicate an LS S Module hardware difficulty.
Description of Situation
2-2– JLG Lift –3124288
SECTION 2 - OPERATION - (LE, MRT, RTS)
2.3DIAGNOSTIC MENU (LE, MRT & RTS)
The Diagnostic Load Menu is another troubleshooting tool
for the Load Sensing System. Sensor and status information is presented in real-time for the technician. Several
sub-menus exist to organize the data.
Note that the Diagnostic Menu changes based on MODEL
Parameter in the Machine Setup Menu (some displays are
suppressed). The information presented in the following
table will be proper when MODEL=3369LE/4069LE/
500RTS or 260MRT (refer to Machine Setup Menu).
Table 2-2. Diagnostic Menu Descriptions (LE, MRT & RTS)
Diagnostics Menu
(Displayed on Analyzer 1
CELL 1:
CELL 2:
CELL 3:
CELL 4:
SYSTEM:
st
Line)
Parameter (Displayed
nd
on Analyzer 2
Line)
PLTLOAD+XXXX LBS or KgDisplays (Total Measured Force – Empty Platform
PLTGROS+XXXX LBS or KgDisplays Total Measured Force (Sum of Pins 1 thru 4
OVERLOADED?Yes / N oDisplays Current LSS Module Overload Status
LOAD+
RDG+XX.XXXX mV/VDisplays Pin Reading in mV/V
INPUT+
GAINXXXX.XDisplays calibration factor from pin
LOAD+
RDG+
INPUT+
GAINXXXX.XDisplays calibration factor from pin
LOAD+
RDG+
INPUT+
GAINXXXX.XDisplays calibration factor from pin
LOAD+
RDG+
INPUT+
GAINXXXX.XDisplays calibration factor from pin
OVLOAD STATOFF / ONState of Overload Status Digital Output
WARNINGOFF / ONState of Warning Digital Output
MOT INHIBITNO / YESStatus of Internal Motion Inhibit Flag
MOTION #1OFF / ONStatus of Digital Input #1
To access the Diagnostic Menu, use the LEFT and RIGHT
Arrow keys to select DIAGNOSTICS from the Top Level
Menu. Press the ENTER key to view the menu.
Press the LEFT and RIGHT Arrow keys to view the displays and select the various sub-menus (PIN 1, PIN 2,
etc.). To access a sub-menu, press the ENTER key. Once
in a sub-menu, press the LEFT and RIGHT Arrow keys to
view the various displays (just like a Top Level menu). To
exit a sub-menu, press the ESC key.
The table below details the structure of the Diagnostic
Menu, and describes the meaning of each piece of information presented.
Parameter Value
(Displayed on Analyzer 2
nd
Description
Line)
Calibration)
LOAD)
XXXX LBS or KgDisplays Calibrated Cell Reading in Current Units
XX.XXXX mVDisplays Pin Reading in mV
XXXX LBS or KgDisplays Calibrated Cell Reading in Current Units
XX.XXXX mV/VDisplays Pin Reading in mV/V
XX.XXXX mVDisplays Pin Reading in mV
XXXX LBS or KgDisplays Calibrated Cell Reading in Current Units
XX.XXXX mV/VDisplays Pin Reading in mV/V
XX.XXXX mVDisplays Pin Reading in mV
XXXX LBS or KgDisplays Calibrated Cell Reading in Current Units
XX.XXXX mV/VDisplays Pin Reading in mV/V
XX.XXXX mVDisplays Pin Reading in mV
3124288– JLG Lift –2-3
SECTION 2 - OPERATION - (LE, MRT, RTS)
Table 2-2. Diagnostic Menu Descriptions (LE, MRT & RTS)
Diagnostics Menu
(Displayed on Analyzer 1
VERSIONS:
st
Line)
Parameter (Displayed
nd
on Analyzer 2
Line)
Parameter Value
(Displayed on Analyzer 2
Line)
nd
Description
MOTION #2OFF / ONStatus of Digital Input #2
MOTION #3*OFF / ONStatus of Digital Input #3
BATTERYXX.XXVDisplays Current Battery Voltage
EXCITEX.XXXXVDisplays Load Pin Excitation Voltage
TEMP+/-XXX.X Deg CDisplay the Temperature Sensed by the LSS Module
for Scissor Pin Compensation
SOFTWAREPX.XXDisplays LSS Module Software Version
HARDWAREXDisplay LSS Module Hardware Revision
ANALYZERVX.XXXXDisplays Analyzer Software Version
2-4– JLG Lift –3124288
2.4PERSONALITIES (LE, MRT & RTS)
SECTION 2 - OPERATION - (LE, MRT, RTS)
NOTE: The following parameter adjust performance of the
Load Sensing System. All adjustments must be made
at access level 1 (33271).
Table 2-3. Personalities Menu Description (LE, MRT, RTS)
Personalities
(Displayed on
Analyzer 1st line)
FAC TORY#1 G AIN
Parameter (Displayed
On Analyzer 2nd line)
OVERLD XXXX
LBS (KGS)
ACC’Y XXXX LBS
(KGS)
MTN DELAY XS
OVR DBNCE XS
OVR HOLD XS
X.XXXX
#1 ZERO
+X.XXXX mV
#2 GAIN
X.XXXX
#2 ZERO
+X.XXXX mV
#3 GAIN
X.XXXX
#3ZERO
+X.XXXX mV
#4 GAIN
X.XXXX
#4 ZERO
+X.XXXX mV
EX GAIN
X.XXXX
TEMP OFFS
+/- XXX.X
Description4069LE3369LE500RTS260MRT
Displays/adjusts the overload limit for this
AWP
Displays/adjusts a de-rating for
Accessories
Displays/adjusts the delay between motion
ceasing and evaluation of overload
Displays/adjusts the de-bounce delay
before an overload
Displays/adjusts the minimum delay
before an overload can be released.
Displays/calibrates the LSS Module analog
channel gain
Displays/calibrates the LSS Module analog
channel offset.
Displays/calibrates the LSS Module analog
channel gain
Displays/calibrates the LSS Module analog
channel offset
Displays/calibrates the LSS Module analog
channel gain
Displays/calibrates the LSS Module analog
channel offset
Displays/calibrates the LSS Module analog
channel gain
Displays/calibrates the LSS Module analog
channel offset
Displays/calibrates the LSS Module excitation measurement gain
Displays/calibrates the LSS Module internal
temp sensor
THE SETTINGS UNDER THE FACTORY MENU OPTION ARE
UNIQUE TO EACH MODULE. THESE SETTINGS ARE NOT TO BE
ALTERED. IN THE EVENT THAT THESE SETTINGS ARE
ALTERED, CONTACT JLG WITH THE SERIAL NUMBER OF THE
MODULE.
No
Extensions-
2628 LBS
(1192 KGS)
Single or
550 LBS
(378 KGS)
0 LBS
(0KGS)
2 SEC2 SEC2 SEC2 SEC
3 SEC3 SEC3 SEC3 SEC
5 SEC5 SEC5 SEC5 SEC
1042 LBS
(473 KGS)
0 LBS
(0KGS)
Dual
Extensions
2083 LBS
(945 KGS)
MegaDeck-
1574 LBS
(714 KGS)
0 LBS
(0KGS)
X
X
X
X
X
X
X
X
X
X
1320 LBS
(599 KGS)
0 LBS
(0KGS)
3124288– JLG Lift –2-5
SECTION 2 - OPERATION - (LE, MRT, RTS)
2.5MACHINE SETUP MENU (LE, MRT &
RTS)
The Machine Setup Menu is used to configure the Load
Sensing System for application on a particular JLG model,
and select the desired force units (i.e. pounds or kilograms). In addition, the technician can trigger the LSS
Module to restore Defaults to all Personalities Parameters
by changing the MODEL to any other selection, and then
re-selecting proper model.
Note that Diagnostics and Personalities Menus change
based on MODEL Parameter (some displays are suppressed).
To access the Machine Setup Menu, use the LEFT and
RIGHT Arrow keys to select MACHINE SETUP from the
Top Level Menu. Press the ENTER key to view the menu.
Press the LEFT and RIGHT Arrow keys to view the displays.
The following table details the structure of the Machine
Setup Menu, and describes the meaning of each parameter.
Displays/adjusts Model Selection. Must be set to proper
model for this application.
(Scissor available after software V7.00)
Displays/adjusts global force
units
2.6CALIBRATION MENU (LE, MRT & RTS)
The Calibration Menu is used to zero the Empty Platform
weight.
To access the Calibration Menu, use the LEFT and RIGHT
Arrow keys to select CALIBRATION from the Top Level
Menu. Press the ENTER key to view the menu.
NOTE: The Calibration Menu is not available in Access
Level 2.
Upon entry to the Calibration Menu, the LSS Module shall
communicate to the Analyzer:
CALIBRATE:
YES:ENTER, NO:ESC
Pressing the ESC key will return the user to the top level
menu and not disturb the prior calibration information.
2-6– JLG Lift –3124288
SECTION 2 - OPERATION - (LE, MRT, RTS)
Pressing the ENTER key will confirm that the platform is
empty (except for factory-installed options outside the
Rated Load). The LSS Module will calculate the total of all
load cell readings and ensure that the total is greater than
minimum calibration value, but less than maximum calibration value. If successful, the Analyzer will show the following:
If the empty platform weight is less than minimum calibration value, the calibration attempt will be unsuccessful and
the Analyzer will show the following:
CALIBRATE:
< MIN CAL
CALIBRATE:
COMPLETE
Table 2-5. Calibration Values
MODELS4069LE3969LE500RTS260MRT
Minimum Cali-
bration Value
Maximum Cali-
bration Value
850 lb
(385 kg)
1425 lb
(646 kg)
850 lb
(385 kg)
1425 lb
(646 kg)
110 0 l b
(499 kg)
2950 lb
(1338 kg)
(340 kg)
1250 lb
(567 kg)
If the empty platform weight is greater than maximum calibration value, the calibration attempt will be unsuccessful
and the Analyzer will show the following:
750 lb
CALIBRATE:
> MAX CAL
3124288– JLG Lift –2-7
SECTION 2 - OPERATION - (LE, MRT, RTS)
(
P
r
e
s
s
E
s
c
a
p
e
T
w
i
c
e
t
o
R
e
t
u
r
n
t
o
H
e
l
p
)
DIAGNOSTICSPERSONALI TIESMACHINE SETUP
FACTORY
MODEL = BOOMLI FT
4069LE, 3369LE, 500RTS,
260MRT, SCISSOR
YES: ENTER, NO:ESC
UNITS = LBS/KG
CALI BRATIONS
OWR HOLD=0,
10, 25, 50, 100,
250, 500MS;1,2
3,5, 10 secr et ar y
ACCY XXXX
LBS, KG
VERSIONS
#2 GAIN X.XXXX
#1 ZERO +/- X.XXXX
#1 GAIN X.XXXX
#2 ZERO +/- X.XXXX
#1 ZERO +/- X.XXXX
#1 GAIN X.XXXX
#3 ZERO +/- X.XXXX
#3 GAIN X.XXXX
#4 ZERO +/- X.XXXX
#4 GAIN X.XXXX
TEMP OFFS +/- XXX.XC
EXCITE GA
IN X.XXXX
OWR DENCE=0,
10, 25, 50, 100,
250, 500MS;1,2
3,5, 10 secr et ary
MTN DLY =0,
10, 25, 50, 100,
250, 500MS;1,2
3,5, 10 secr et ar y
OVERLD XXXX
LBS, KG
Figure 2-1. Module Analyzer Flow Chart
2-8– JLG Lift –3124288
SECTION 2 - OPERATION - (LE, MRT, RTS)
2.7JLG WORKSTATION IN THE SKY™
ACCESSORIES
The Load Sensing System must be configured for proper
operation with JLG Sky™ Accessories. Calibration of the
Load Sensing System can be performed with the Accessory mounted in the platform.
A platform-mounted accessory slightly reduces the
amount of load that can be carried before the vehicle
becomes overloaded. This extra load must be accounted
for to enable the accessory to be mounted during Calibration.
A De-Rating is provided for JLG Sky Accessories via decal
and/or the JLG Workstation in the Sky
ual. This De-Rating must be entered into the LSS Module’s ACC’Y Personality to cause the system to accurately
indicate overload (by the De-Rating factor).
Example: Consider that of the Easi-Cladder™ with a DeRating of 300 lbs (136 kg) mounted on a 500RTS. Without
De-Rating, the Load Sensing System will declare on Overload at 2750 lb (1247 kg), which is 110% of its 2500 lb
(1134 kg) rated Load. When the De-Rating for Easi-Cladder™ is entered into the ACC’Y Personality, the LSS will
declare Overload 300 lb (136 kg) earlier (2450 lb or 1111
kg).
TM
Accessory Man-
Table 2-6. LSS Module Guidelines
PERSONALITYSETTING
ACC’Y300 lb (136 kg)
Procedurally, the Accessory should be mounted to the
platform and the LSS Module’s ACC’Y Personality should
be set using the guidelines above. Calibration should be
performed as outlined in this manual. During Testing &
Evaluation, it should be noted that the LSS will declare
Overload with less platform load (by the amount of the DeRating).
3124288– JLG Lift –2-9
SECTION 2 - OPERATION - (LE, MRT, RTS)
NOTES:
2-10– JLG Lift –3124288
SECTION 3 - OPERATION - (ES, RT)
SECTION 3. OPERATION - (ES, RT)
3.1CONNECTING THE JLG CONTROL
SYSTEM ANALYZER (ES & RT)
1. Connect the cable supplied with the Analyzer to the
host control system located at the ground controlstation on both the ES and the RT models. There is
also an alternate connection on the under side of the
platform control station on the RT. Connect the
remaining end of the cable to the analyzer.
NOTE: The cable has a four-pin connector at each end of
the cable; The cable cannot be connected backwards.
2. Power-up the Control System by turning the key to
the Platform or Ground position and pulling both
emergency stop buttons.
Table 3-1. LSS Fault Codes (LE, MRT and RTS)
Help/Logged Message
PLATFORM OVERLOADE D
BATTERY TOO HIGH4-4Incoming Supply Voltage >34.0 Vdc. The control system’s battery voltage is too high. This may be due to over-charg-
BATT TOO LOW4-4Incoming Supply Voltage <9.0 Vdc. The control system’s battery voltage is too low due to excessive electrical load or
CANBUS FAILURE: LSS
MODULE
C EL L #1 E R RO R8 -1C el l #1 ’ s Br i dg e <2 V, >3 V, o r c o ul d no t r ea d Ce ll #1’s Internal Memory. This situation indicates damage to the sen-
C EL L #2 E R RO R8 -2C el l #2 ’ s Br i dg e <2 V, >3 V, o r c o ul d no t r ea d Ce ll #2’s Internal Memory. This situation indicates damage to the sen-
C EL L #3 E R RO R8 -3C el l #3 ’ s Br i dg e <2 V, >3 V, o r c o ul d no t r ea d Ce ll #3’s Internal Memory. This situation indicates damage to the sen-
C EL L #4 E R RO R8 -4C el l #4 ’ s Br i dg e <2 V, >3 V, o r c o ul d no t r ea d Ce ll #4’s Internal Memory. This situation indicates damage to the sen-
WATCHDOG RST9-1Microprocessor’s Watchdog Timer Triggered. This is an indication that the LSS Module has been exposed to exces-
EEPROM ERROR9-2Memory used to retain Personality/Machine Setup/Calibration has been corrupted and must be reset by verifying all
LSS NOT CALIBRATED9-3Calibration has not been successfully completed. A new LSS Module will display this message until properly cali-
LSS INTERNAL ERROR
- PIN EXCITATION
LSS INTERNAL ERROR
- DRDY MISSING FROM
A/D
Flash
Code
2-5The platform load measured at the Load Sensing System is excessive. Functions from the platform control are pre-
vented, and functions from the ground control may be prevented, depending on machine.
ing or improper charger operation.
discharge. This may compromise ability to predict weight. Recharge batteries or check for damaged batteries.
6-6 The control system failed to receive messages from the LSS Module. Check wiring at the LSS Module and along scis-
sor arms leading up to platform.
sor or its wiring.
sor or its wiring.
sor or its wiring.
sor or its wiring.
sive electrical noise, or has experienced a hardware difficulty.
entries and re-calibrating. After resolution, re-cycle power to clear difficulty.
brated.
9-9Pin excitation <4.25 V. The sensors may be excessively loading the excitation supply, or the LSS Module may have
hardware difficulty.
9-9DRDY Interrupt from LSS Module’s A/D conver ter missing. This may indicate an LSS Module hardware difficulty.
3.2HELP MENU & FAULT CODES (ES & RT)
The Help Menu is a troubleshooting tool to communicate
detected System Faults to the technician. The following
table documents the Faults for the Load Sensing System.
To access the Help Menu, use the LEFT and RIGHT arrow
keys to select HELP: PRESS ENTER from the Top Level
Menu. Press the ENTER key to view the menu.
When accessing the Help Menu, the JLG Analyzer will display EVERYTHING OK if the platform is not overloaded
and no difficulties are detected. Otherwise, the JLG Analyzer will display OVERLOADED.
In the event of difficulty, the user can press ENTER again
to display Logged Help, which is a record of the last 16
Fault Messages. The following table lists each Help/
Logged Message, the Flash Code (for each Fault, the
module will flash the two-digit code on its LED) triggered
by the Fault, and a Description of the Situation (cause).
Description of Situation
3124288– JLG Lift –3-1
SECTION 3 - OPERATION - (ES, RT)
3.3DIAGNOSTIC MENU (ES & RT)
The Diagnostic Load Menu is another troubleshooting tool
for the Load Sensing System. Sensor and status information is presented in real-time for the technician.
To access the Diagnostic Menu, use the LEFT and RIGHT
Arrow keys to select DIAGNOSTICS from the Top Level
Menu. Press the ENTER key to select the menu.
Table 3-2. Diagnostic Menu Descriptions (ES & RT)
Diagnostics Menu
(Displayed on Analyzer 1
LOAD:
st
Parameter (Displayed
Line)
on Analyzer 2
PLTLOAD+XXXX KgDisplays (Total Measured Force – Empty Platform
PLTGROS+
OVERLOADED?Yes / N oDisplays Current LSS Module Over load Status
CELL 1+
CELL 2+
CELL 3+
CELL 4+XXXX KgDisplays Calibrated Cell Reading in kilograms
ANALYZERVX.XXXXDisplays Analyzer Software Version
nd
Line)
NOTE: The Diagnostic, Load menu is not available when the
LSS is not enabled. (Machine Setup, Load is set to
0=Not Installed
Press the LEFT and RIGHT Arrow keys to view the load
sub-menus and press the enter key. Once in the load submenu, press the LEFT and RIGHT arrow keys to view the
various displays.
The table below details the structure of the Diagnostic,
Load Menu, and describes the meaning of each piece of
information presented.
Parameter Value
(Displayed on Analyzer 2
Line)
XXXX KgD i sp l ay s Tot a l Me a su r ed F or c e (S u m o f Pi n s 1 t h r u 4
XXXX KgDisplays Calibrated Cell Reading in kilograms
XXXX KgDisplays Calibrated Cell Reading in kilograms
XXXX KgDisplays Calibrated Cell Reading in kilograms
nd
Calibration), in kilograms
LOA D) in k ilo gr ams
Description
3.4PERSONALITIES (ES & RT)
The following parameter in the PERSONALITIES, LOAD
menu adjust performance of the LSS. All adjustments
must be made in Access Level 1 (33271).
Table 3-3. Personalities (ES & RT)
Submenu (Displayed on
analyzer1st LIne)
LOAD:ACC’Y XXXX KG
Parameter (Displayed on
REFER TO JLG WORKSTATION IN THE SKY™ ACCESSORIES IN
THIS SECTION WITH REGARD TO SETTING THE ACCY PERSONALITIES.
analyzer 2nd line)
OVR DBNCE 3 S
OVR HOLD 5 S
Description
Displays/adjusts a derating
for accessories
Displays/ adjusts the
debounce delay before an
overload
Displays/adjusts the minimum delay before an overload
can be released.
3-2– JLG Lift –3124288
SECTION 3 - OPERATION - (ES, RT)
3.5MACHINE SETUP MENU (ES & RT)
The LOAD submenu within the machine setup menu is
used to configure the LSS. To access the Machine Setup,
Load menu, use the Left and Right arrow keys to select
MACHINE SETUP from the Top Level Menu. Press the
ENTER key to select the menu. Press the Left and Right
arrow keys to select LOAD from the MACHINE SETUP
menu. Press the Enter key to view the submenu.
The following table details the structure of the load submenu and describes the meaning of the parameter.
Table 3-4. Machine Setup
Submenu
(Displayed on
analyzer1st LIne)
LOAD:
Parameter
(Displayed on
analyzer 2nd line)
0 = NOT INSTALLED
1 = CUTOUT PLT
2 =CUTOUT ALL
Description
Displays/adjusts the
LSS Module
3.6CALIBRATION MENU (ES & RT)
The Load submenu within the Calibration Menu is used to
zero the Empty Platform weight.
To access the Calibration Load Menu, use the LEFT and
RIGHT Arrow keys to select CALIBRATION from the Top
Level Menu. Press the ENTER key to select the menu.
Press the LEFT and RIGHT arrow keys to select LOAD
from the CALIBRATION menu. Press the ENTER key to
view the submenu.
NOTE: The Calibration Menu is not available in Access
Level 2.
Upon entry to the Calibration, Load Menu, the analyzer
will display:
CALIBRATE:
YES:ENTER, NO:ESC
Pressing the ESC key will return the user to the top level
menu and not disturb the prior calibration information.
3124288– JLG Lift –3-3
SECTION 3 - OPERATION - (ES, RT)
Pressing the ENTER key will confirm that the platform is
empty (except for factory-installed options outside the
Rated Load). The LSS Module will calculate the total of all
load cell readings and ensure that the total is greater than
minimum calibration value, but less than maximum calibration value. If successful, the Analyzer will show the following:
CALIBRATE:
COMPLETE
If the empty platform weight is less than minimum calibration value, the calibration attempt will be unsuccessful and
the Analyzer will show the following:
CALIBRATE:
< MIN CAL
If the empty platform weight is greater than maximum calibration value, the calibration attempt will be unsuccessful
and the Analyzer will show the following:
Table 3-5. Calibration Values
MODELSESRT
Minimum Calibration Value
Maximum Calibration Value
45 KG
(99 LB)
275 KG
(606 LB)
225 KG
(496 LB)
1020KG
(2249 LB)
CALIBRATE:
> MAX CAL
3-4– JLG Lift –3124288
SECTION 3 - OPERATION - (ES, RT)
(
P
r
e
s
s
E
s
c
a
p
e
T
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i
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o
R
e
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o
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e
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)
DIAGNOSTICSPERSONALI TIESMACHINE SETUP
FACTORY
MODEL = BOOMLI FT
4069LE, 3369LE, 500RTS,
260MRT, SCISSOR
YES: ENTER, NO:ESC
UNITS = LBS/KG
CALI BRATIONS
OWR HOLD=0,
10, 25, 50, 100,
250, 500MS;1,2
3,5, 10 secr et ar y
ACCY XXXX
LBS, KG
VERSIONS
#2 GAIN X.XXXX
#1 ZERO +/- X.XXXX
#1 GAIN X.XXXX
#2 ZERO +/- X.XXXX
#1 ZERO +/- X.XXXX
#1 GAIN X.XXXX
#3 ZERO +/- X.XXXX
#3 GAIN X.XXXX
#4 ZERO +/- X.XXXX
#4 GAIN X.XXXX
TEMP OFFS +/- XXX.XC
EXCITE GA
IN X.XXXX
OWR DENCE=0,
10, 25, 50, 100,
250, 500MS;1,2
3,5, 10 secr et ary
MTN DLY =0,
10, 25, 50, 100,
250, 500MS;1,2
3,5, 10 secr et ar y
OVERLD XXXX
LBS, KG
Figure 3-1. Module Analyzer Flow Chart
3124288– JLG Lift –3-5
SECTION 3 - OPERATION - (ES, RT)
NOTES:
3-6– JLG Lift –3124288
SECTION 4. OPERATION - (RS)
SECTION 4 - OPERATION - (RS)
4.1CONNECTING THE JLG CONTROL
SYSTEM ANALYZER (RS)
1. Remove the compartment panel on the ground con-
trol side of the machine.
2. Disconnect the 4 pin connector which provides
power and information to the MDI Display.
3. Connect the cable supplied with the Analyzer to the
mating 4 pin connector that was just disconnected.
NOTE: The cable has a four-pin connector at each end of
the cable; The cable cannot be connected backwards.
4. Power-up the Control System by turning the key to
the Ground Control position and pull the Ground
emergency stop button.
Table 4-1. LSS Fault Codes (RS ONLY)
HELP/LOGGED MESSAGE
Everything OKLED ON The "Normal" Help Message
PLATFORM OVERLOADED2-5While the Load Sensing System is enabled, the Platform Load measured by the Load Sensing System is
CANBUS FAILURE - LSS
ANGLE SENSOR
LSS PRESSURE SENSOR DISAGREEMENT
LSS ANGLE SENSOR - DIRECTION DISAGREEMENT
LSS ANGLE SENSOR OUT OF RANGE HIGH
LSS ANGLE SENSOR OUT OF RANGE LOW
LSS ANGLE SENSOR HAS
NOT BEEN CALIBRATED
FLASH
CODE
excessive. Functions from Platform Control are prevented, and functions from Ground Control may be prevented, depending on machine configuration (Markets other than Japan).
For the Japanese Market, only Lift Up is prevented and Drive (at creep speed) is allowed in the stowed position.
6-6The Control System Failed to receive messages from the Angle Sensor. Check wiring to the Angle Sensor.
8-2Pressure Sensor 1 and Pressure Sensor 2 do not agree. The system shall assume the machine is overloaded
until the sensors agree.
Using the Analyzer LOAD submenu under DIAGNOSTICS check PRES1 and PRES2 readings. They must
agree within 75 PSI. With the safety prop engaged check to ensure that the appropriate voltage is being supplied to both sensors and that the wiring and connections are intact. The voltage between pins A and B should
read +5V +/- 0.5V with the machine turned on. If the voltage supplied is correct, replace both transducers.
8-2The Angle sensors change in reading does not agree with the direction of machine motion (lift up).This indi-
cates that the direction of movement of the platform does not agree with the angle sensors change in output.
Ensure that the angle sensor is installed properly and that the lever arm is not damaged.
8-2The Angle Sensor's reading when the machine is at maximum elevation does not fall within the high end
acceptable range. The Angle Sensors reading must be less than or equal to 245 counts at maximum elevation.
Ensure that the Angle Sensor is mounted properly.
8-2The Angle Sensor's reading when the machine is stowed does not fall within the low end acceptable range.
The Angle Sensors reading must be greater than or equal to 5 counts with the platform stowed.
Ensure that the Angle Sensor is mounted properly.
8-2The Angle Sensor has never been calibrated and the control system assumes that the platform is overloaded.
Calibrate the Angle Sensor using the CALIBRAT ION: ANGLE submenu to clear the message.
4.2HELP MENU & FAULT CODES (RS)
The Help Menu is a troubleshooting tool to communicate
detected System Faults to the technician. The following
table documents the Faults for the Load Sensing System.
To access the Help Menu, use the LEFT and RIGHT arrow
keys to select HELP: PRESS ENTER from the Top Level
Menu. Press the ENTER key to view the menu.
When accessing the Help Menu, the JLG Analyzer will display EVERYTHING OK if the platform is not overloaded
and no difficulties are detected. Otherwise, the JLG Analyzer will display OVERLOADED.
In the event of difficulty, the user can press ENTER again
to display Logged Help, which is a record of the last 16
Fault Messages. The following table lists each Help/
Logged Message, the Flash Code (for each Fault, the
module will flash the two-digit code on its LED) triggered
by the Fault, and a Description of the Situation (cause).
DESCRIPTION OF SITUATION
3124288– JLG Lift –4-1
SECTION 4 - OPERATION - (RS)
4.3DIAGNOSTIC MENU (RS)
The Diagnostic Load and Angle menu's are another troubleshooting tool for the Load Sensing System. Sensor
and status information is presented in real-time for the
technician.
To access the Diagnostic Menu, use the LEFT and RIGHT
Arrow keys to select DIAGNOSTICS from the Top Level
Menu. Press the ENTER key to select the menu.
NOTE: The Diagnostic Load and Angle menu's are not avail-
able when the LSS is not enabled. (Machine Setup,
Load is set to 0=Not Installed
Press the LEFT and RIGHT arrow keys to view the load
and angle sub-menu and press the enter key. Once in the
load and angle submenu, press the LEFT and RIGHT
arrow keys to view the various displays.
The table below details the structure of the Diagnostic,
Load Menu and Angle Menu, and describes the meaning
of each piece of information presented.
Table 4-2. Diagnostic Menu Descriptions (RS)
DIAGNOSTICS MENU
(Displayed on Analyzer 1
st
Line)
PARAMETER
(Displayed on Analyzer
nd
Line)
2
PARAMETER VALUE
(Displayed on Analyzer 2
Line)
nd
DESCRIPTION
LOAD:OVERLOADED?Yes/NoDisplays the current LSS state.
PRES1xxxxPSIDisplays the actual pressure reading from Pres-
sure Transducer #1.
PRES2xxxxPSIDisplays the actual pressure reading from Pres-
sure Transducer #2.
LOAD: PRES DIFP1-P2xxxxPSIDisplays the absolute pressure difference
between transducer 1 and transducer 2. PRES DIF
= ABSOLUTE(PRES1 - PRES2).
LOAD: PRES DIFOVLD-P1xxxxPSIDisplays the pressure difference between Lift Up
or Lift Down Pressure Overload Limits (depending
on motion) and Actual Pressure.
M AR G IN = L if t U p P r es s ur e Ov e r lo a d L i mi t -
P RE S 1 o r M AR G IN = Li f t Do w n Pr e ss u re O ve r load Limit - PRES1.
LOAD: TOCLEAROVLDPRESxxxxPSIDisplays the amount of pressure that must be
reduced before the overload condition is resolved.
XXX = PRES1 - (OVRPRES - PRESREDUCE).
When an overload condition does not exist this
value shall be 0.
ANGLE:MINANGLExxxDisplays the angle sensors MINANGLE (stowed)
value based on angle sensor calibration.
MAXANGLExxxDisplays the angle sensors MAXANGLE (max ele-
vation) value based on angle sensor calibration.
ANGLERANGExxxDisplays the difference between MAXANGLE and
MINANGLE.
ANGLERANGE = MAXANGLE - MINANGLE.
ANGLExxxDisplays the actual angle sensor count value at all
times.
4-2– JLG Lift –3124288
SECTION 4 - OPERATION - (RS)
CAL ANGLE:
YES:ENTER NO:ESC
4.4PERSONALITIES MENU (RS)
The following parameter in the PERSONALITIES, LOAD
menu adjust performance of the LSS. All adjustments
must be made in Access Level 1 (33271).
Table 4-3. Personalities Menu Description (RS)
SUBMENU
(Displayed on
Analyzer 1st line)
LOAD:OVR DBNCE 0.3SDisplays/Adjusts the
PAR AMET ER
(Displayed on
Analyzer 2nd Line)
OVR HOLD 5.0SDisplays/Adjusts the
DESCRIPTION
debounce delay for an
overload.
minimum delay
before an overload
can be resolved.
4.5CALIBRATION MENU (RS)
NOTE: The Load Sensing System cannot be calibrated with-
out first calibrating the machines Angle Sensor.
Angle Sensor Calibration (RS Only)
To access the Calibration Angle Menu, use the LEFT and
RIGHT Arrow keys to select CALIBRATION from the Top
Level Menu. Press the ENTER key to select the menu.
Press the LEFT and RIGHT arrow keys to select ANGLE
from the CALIBRATION menu. Press the ENTER key to
view the submenu.
Should the Analyzer read CAL ANGLE:FAIL at any time
during the calibration procedure, reference the table
below for the failure listed by the Analyzer.
NOTE: The Calibration Menu is not available in Access
Level 2.
Upon entry to the Calibration, ANGLE Menu, the analyzer
will display:
CAL ANGLE:
YES:ENTER, NO:ESC
Pressing the ESC key will return the user to the top level
menu and not disturb the prior calibration information.
3124288– JLG Lift –4-3
SECTION 4 - OPERATION - (RS)
CAL ANGLE:
LIFT TO MAX
CAL ANGLE:
LOWER TO STOWED
CAL ANGLE:
COMPLETE!
Pressing the Enter key will request that the technician
engage lift up until the platform has reached maximum
height:
CAL ANGLE:
LIFT TO MAX
If the Angle Sensor's reading at maximum height is
acceptable the Control System will record the sensors
value and Analyzer will display the following.
If the Angle Sensors range from stowed to maximum
height is acceptable the Analyzer will display the following:
MAX NOT IN RANGEThe Angle Sensors upper limit is not accept-
able. It must fall within +/- 35 counts of 210
counts.
MAXANGLE TOO HIGHThe MAXANGLE value was greater than 245
counts. The MAXANGLE value mu st be a number less than or equal to 245.
LOW NOT IN RANGEThe Angle Sensors lower limit is not acceptable.
It must fall within +/- 35 counts of 40 counts.
MINANGLE TOO LOWThe MINANGLE value was less than 5 counts.
The MINANGLE value must be a number more
t ha n or e q ua l to 5 .
INVALID RANGEThe sensors range from the platform stowed
position to the platform's maximum elevation
position was not acceptable.
CAL FAIL!The technician has pressed ESC on the Ana-
lyzer during the calibration routine
4.6LOAD SENSING SYSTEM CALIBRATION
(RS ONLY)
To access the Calibration Load Menu, use the LEFT and
RIGHT Arrow keys to select CALIBRATION from the Top
Level Menu. Press the ENTER key to select the menu.
Press the LEFT and RIGHT arrow keys to select LOAD
from the CALIBRATION menu. Press the ENTER key to
view the submenu. Should the Analyzer read CAL
LOAD:FAIL at any time during the calibration procedure,
reference the table below for the failure listed by the Analyzer.
DESCRIPTIONCHECK
Upon entry to the Calibration, LOAD Menu, the analyzer
will display:
• Check the Angle Sensor to ensure it is
installed properly.
• Ensure that the Angle Sensors lever arm is
installed properly.
• Check the Angle Sensor to ensure it is
installed properly.
• Ensure that the Angle Sensors lever arm is
installed properly.
• Check the Angle Sensor to ensure it is
installed properly.
• Ensure that the Angle Sensors lever arm is
installed properly.
• Check the Angle Sensor to ensure it is
installed properly.
• Ensure that the Angle Sensors lever arm is
installed properly.
• "Check the Angle Sensor to ensure it is
installed properly.
• "Ensure that the Angle Sensors lever arm is
installed properly.
NOTE: The Calibration Menu is not available in Access
Level 2.
PRIOR TO LOAD SENSING SYSTEM CALIBRATION ENSURE THAT
THE MACHINE HAS BEEN PLACED ON LEVEL GROUND, THE
HYDRAULIC FLUID IS WITHIN THE ACCEPTABLE RANGE, THE
TEMPERATURE IS GREATER THAN 32 DEGREES F, AND THE
BATTERIES ARE FULLY CHARGED.
CAL LOAD:
YES:ENTER, NO:ESC
Pressing the ESC key at any time will return the user to the
top level menu and not disturb the prior calibration information.
Pressing the Enter key will ensure that appropriate Calibration Weight, 110% rated load, has been placed in the
3124288– JLG Lift –4-5
SECTION 4 - OPERATION - (RS)
CAL LOAD:
110% LOAD CENTER?
CAL LOAD:
LIFT TO MAX ELEV
CAL LOAD:
LOWER TO STOWED
CAL LOAD:
COMPLETE!
center of the platform. The Analyzer will display the following.
CAL LOAD:
110%LOAD,CENTER?
Pressing the Enter Key again will make the Analyzer display the following which means engage lift up from the
ground panel until the platform reaches maximum elevation.
Pressing the Enter key again will make the Analyzer display the following which means engage lift down until the
platform becomes stowed.
CAL LOAD:
LOWER TO STOWED
If the Load Calibration is successful the Analyzer will display the following.
NOT IN GND MODEThe machine is not in Ground Mode.• Set the key switch so that the machine is in
CAL ANGLEThe Angle Sensor has not been calibrated.• Navigate to the Calibrations menu and
PLAT NOT STOWEDThe machines platform is not stowed. • Ensure that the platform is stowed and per-
MOTION STOPPEDThe platform stopped moving during calibra-
tion.
CAL FAILThe technician has pressed ESC on the Ana-
lyzer during the calibration routine.
DESCRIPTIONCHECK
Ground Mode.
• The machine must be in ground Mode for
Load calibration.
enter the Angle submenu to perform Angle
Sensor calibration.
• The Angle sensor must be calibrated
before Load calibration can occur.
form the Load calibration again.
•The technician let go of the lift up switch
before the machine reached maximum elevation during "CAL LOAD: LIFT TO MAX
ELEV".
3124288– JLG Lift –4-7
SECTION 4 - OPERATION - (RS)
NOTES:
4-8– JLG Lift –3124288
SECTION 5 - SERVICE - (LE, MRT, RTS, ES, RT)
1
2
3
465
NOTE ORI ENTATION OF PIN ARROW,
POINTED AWAY FROM PLATFORM
8
7
1. Load Cell (Typical 4 Corners)
2. System Interface - Power & Digital - J1
3. System Interface Communication - J2
4. Indicator Light
5. Rear Right Load Cell - J8
6. Rear Left Load Cell - J7
7. Front Right Load Cell - J6
8. Front Left Load Cell - J5
Figure 5-1. Load Sense Module
SECTION 5. SERVICE - (LE, MRT, RTS, ES, RT)
5.1DESCRIPTION
The system consists of the LSS Module, four Shear Pin
Load Cells (sensors), Wire Harness, and various brackets
and fasteners. The LSS Module is mounted beneath the
platform on a bracket. The Shear Pin Load Cells mount
between the platform and the arm structure in such a way
that all support force for the platform is applied through
them (for measurement). The four Shear Pin Load Cells
plug directly into the LSS Module. The Wire Harness connects the LSS Module to the Host Control System.
3124288– JLG Lift –5-1
SECTION 5 - SERVICE - (LE, MRT, RTS, ES, RT)
5.2CALIBRATION
Procedure
1. Plug the JLG Analyzer into the LSS Module on the
LE, MRT and RTS or the Host Control System on the
ES and RT and enter the Access Level 1 Password.
Do not confuse the Host Control System and LSS
Module’s Analyzer Connections. Proceed to the
ACCESS LEVEL menu and enter the Access Level 1
Password (33271).
2. Park the vehicle on a level surface.
should be fully stowed and level within ± 5° (both
directions).
3. Configure the LSS Module for the proper model and
Desired Units. On LE, MRT and RTS, proceed to the
LSS Module’s MACHINE SETUP, MODEL sub-menu
and select “MODEL=4069LE, 3369LE, 500RTS, or
260MRT”. Press the RIGHT ARROW to view the
Units Selection. Select “UNITS=LBS” for platform
load measurement in Pounds, and “UNITS=KG” for
measurement in Kilograms.
EARLY RT’S REQUIRE A CONFIGURATION TO THE LSS MODULE.
PLUG THE JLG ANALYZER INTO THE MODULE’S CONNECTION
BENEATH THE DECKAND ENTER THE ACCESS LEVEL 1 PASSWORD (33271). UNDER MACHINE SETUP ENSURE THAT
MODEL=260MRT.
4. Remove everything except JLG Accessories from
the Platform. Empty the platform to allow the Load
Sensing System to record its weight during calibration. All tools, debris, and customer-installed devices
shall be removed. Permanently-fixed JLG Accessories shall remain and their contribution toward Rated
Load will be accounted for in the next step.
5. Configure the LSS Module for JLG Accessories.
contribution of each permanently-fixed JLG Accessory toward Rated Load must be determined. JLG
Accessories are decaled with their effective contribution toward Rated Load. If this decal is missing, reference the appropriate manual for the JLG
Accessory. Once determined, the contributions of all
permanently-fixed JLG Accessories mounted in the
platform of the vehicle shall be added together and
entered in the Analyzer’s PERSONALITIES, ACC’Y
display (using the proper units).
The platform
The
6. Execute a Calibration via the JLG Analyzer.
to the Analyzer’s CALIBRATION top level menu and
press ENTER. Press ESC to abort a calibration or
ENTER to calibrate (tare). 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.
Proceed
Te s t i n g & E v a l u a t i o n
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 (LE,
MRT and RTS) or the Host Control System (ES and
RT).
2. Park the vehicle on a level surface.
should be fully stowed and level within ± 5° (both
directions).
3. Observe the Empty Platform Weight.
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 +
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.
cian should enter the platform and record the PLTLOAD 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 technician. The range of the readings should be no more
than 40lbs (18kg) (max PLTLOAD reading – min PLTLOAD reading).
15lbs (± 7kg). Further, the reading
The platform
Proceed to the
The techni-
5-2– JLG Lift –3124288
SECTION 5 - SERVICE - (LE, MRT, RTS, ES, RT)
5. Confirm Host Control System Warnings and Interlocks. Using the vehicle’s keyswitch, select Platform
Mode and power-up. Start the vehicle’s engine (If
equipped) 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 Pin Load Cell connected to J5 on the LSS Module. 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 (If equipped), all platform 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. Install
the disconnected Shear Pin Load Cell back in J5 on
the LSS Module. 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
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 when using the engine (if the Host Controls
System’s MACHINE SETUP, LOAD is set to “2=CUTOUT PLT”. If set to “3=CUTOUT ALL”, then Ground
Controls will be prevented when using the platform).
Re-fit the Shear Pin Load Cell connector 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 platform in the fully
stowed position for safety. Place 120% of the
machines rated load in the center of the platform
and ensure that the overload visual and audible
warnings are active. Reduce the platform load to
100% rated load and ensure that the warnings are
not active. For vehicles with multiple capacities,
evaluate each operating mode with the proper rated
load.
3124288– JLG Lift –5-3
SECTION 5 - SERVICE - (LE, MRT, RTS, ES, RT)
5.3TROUBLESHOOTING
The following tables are furnished to provide possible resolutions for common difficulties. Difficulties are classified
Table 5-1. LSS Troubleshooting Chart - General
DifficultyPossible Resolution
JLG Analyzer does not display
“HELP: PRESS ENTER” when
connected to LSS Module’s
connection, but the module’s
LED is lit or flashing.
LED on LSS Module does not
light.
The JLG Analyzer is failing to communicate with the LSS Module, but the LSS Module is
powered (indicated by module’s LED). Investigate JLG Analyzer serial communication and
power supply connections.
1. If the Analyzer displays “CONNECTING…” or “CONNECTION ERROR” after a short
interval, examine the Analyzer harness on J2. J2-2 should connect to Pin 3 on the
Analyzer, and J2-11 should connect to Pin 2.
2. If the Analyzer does not display anything (and there is no backlighting), examine the
Analyzer’s power supply. Remove the harness connection from J2 and ensure that
J2-1 has approximately 12V, and J2-12 is 0V. The harness should connect J2-1 to Pin
1 on the Analyzer, and J2-12 to Pin 4 on the Analyzer.
3. The JLG Analyzer is suspect. Substitute to determine cause of failure.
4. The LSS Module is suspect. Substitute to determine cause of failure.
The LSS Module is un-powered, a short exists, or the device is damaged.
1. LSS Module’s power supply is improper. Check for the presence of approximately
12V on J1-1, and 0V on J1-2. The module’s power supply comes from the Platform
Console Box. Use to the Wiring Diagram to trace the conductors to their source.
2. There is a short circuit on the reference voltage present on J5-J8. Unplug the connectors one at a time and observe if the module begins to function after a particular
connection is removed. If so, carefully inspect the wiring between the module and
that sensor.
3. There is a short circuit on the pre-regulated supply for the JLG Analyzer present on
J2-1. Unplug J2’s connector and observe whether the module begins to function. If
so, examine the Analyzer harness for defect.
4. The LSS Module is suspect. Substitute to determine cause of failure.
as General, Calibration, Measurement Performance, and
Host System Functionality.
5-4– JLG Lift –3124288
DifficultyPossible Resolution
JLG Analyzer displays
“<MIN CAL” after attempt is
made to Calibrate.
JLG Analyzer displays “>MAX
CAL” after attempt is made to
Calibrate.
The LSS Module expected the empty platform to weight more for calibration.
1. The platform is being supported by something other than the four Shear Pin Load
Cells. This includes binding between the slide block/spacer bushing/arm tube
assembly (bushing should be free enough to rotate by hand). For proper operation,
the platform’s entire weight must be transferred through the Shear Pin Load Cells
and into the arm support structure for an accurate calibration.
2. The wrong Model Selection was made under the LSS Module’s MACHINE SETUP,
MODEL. This should be set to the proper MODEL (4069LE, 3369LE, 500RTS,
260MRT or SCISSOR). Improper selection may lead the LSS Module to expect different empty platform weights.
3. The calibration difficulty may be a result of a Measurement Performance issue.
Review the Possible Resolutions under that category.
The LSS Module expects the empty platform to weigh less for calibration.
1. Tools, debris, or customer-installed accessories have not been removed before calibration. The LSS Module must tare an empty platform and its optional JLG Accessories.
2. The wrong Model Selection was made under the LSS Module’s MACHINE SETUP,
MODEL. This should be set to MODEL (4069LE, 3369LE, 500RTS, or 260MRT).
Improper selection may lead the LSS Module to expect different empty platform
weights.
3. The calibration difficulty may be a result of a Measurement Performance issue.
Review the Possible Resolutions under that category.
Empty Platform Weight (DIAGNOSTICS, PLTLOAD) is not
within +
Platform Load readings (DIAGNOTICS, PLTLOAD) are unstable by more than +2lbs (±1kg)
(without the influence of vibration or wind).
There are large variations in
Platform Load (DIAGNOSTICS, PLTLOAD) based on the
location of the load. Tolerance
to variations is 40lbs (18kg) for
an evaluation using the technician’s weight, and +
Rated Load when using calibrated weights.
15lbs (±7kg) of zero.
or
or
5% of
The LSS Module is unable to properly measure the platform weight.
1. One of the Shear Pin Load Cells is not properly plugged into the LSS Module. Since
the connectors seal with an O-ring and are located in a crowded area, it is possible
that the connectors are threaded together, but poor electrical contact is made.
Attempt to wiggle the molded portion of each connector on J5-J8. If properly tightened, the molded portion should not move. Also, examined each Shear Pin Load
Cell’s readings via the JLG Analyzer. Proceed to the DIAGNOSTICS, CELL 1-4, LOAD
displays and determine if the readings are reasonable. Note that it is possible to have
only two sensors carrying all of the platform load due to fit between the platform and
support structure (this is normal).
2. Wiring leading to one of the Shear Pin Load Cells is damaged. Examine each sensor’s reading using the JLG Analyzer. Proceed to the DIAGNOSTICS, CELL 1-4,
LOAD displays and determine if the readings are reasonable and responsive to slight
downward pressure above the sensor being viewed. Carefully inspect sensor wiring
where it passes through cable clamps for signs of damage. Inspect wiring where
damage to the channel is apparent. If damage to the sensor’s cordset is found,
replace the appropriate Shear Pin Load Cell since the cordset is not serviceable
(connector is molded for moisture resistance; cordset is soldered into sensor
beneath welded stainless steel cover). If damage to the sensors extension cordset is
found, unplug both ends and fit a replacement.
3. One of the Shear Pin Load Cells was not assembled properly during installation.
Examine each sensor’s reading using the JLG Analyzer. Proceed to the DIAGNOSTICS, CELL 1-4, LOAD displays and determine if the readings are reasonable. It is
often helpful to apply slight downward pressure above the sensor being examined
and observe that its output increases (increasing force measurement; decreasing
means the sensor is mounted upside-down). Compare the order of assembly to the
detail on the Installation Drawing and ensure that the only contact between the platform and the support is through the sensor bodies (nothing else touches except
wires). Re-assemble according to print if necessary.
4. Damage to the platform or arm structure has occurred or one of the components is
out-of-tolerance.Twists in the platform, for instance, will cause huge off-axis forces to
be applied to the Shear Pin Load Cells, disturbing their primary measurement axis
readings. If Lift Up / Down is noisy or not smooth, examine this issue thoroughly.
Resolution is to replace the damaged or faulty component. Watch for Shear Pin Load
Cell damage (yield) as a result of this difficulty.
5. One of the Shear Pin Load Cells is contaminated by debris or moisture. Examine
each sensor’s reading using the JLG Analyzer. Proceed to the DIAGNOSTICS, CELL
1-4, LOAD displays and determine if the readings are reasonable and stable (not
changing by more than +
Lack of measurement stability is a key indication of contamination. Unplug the
appropriate connector (J5 is CELL 1, J6 is CELL 2, J7 is CELL 3, and J8 is CELL 4)
and inspect for dirt or moisture. Look carefully into the female connector on the sensor’s cordset for evidence of contamination. Debris should be brushed away with a
soft bristle brush (do not introduce any cleaners as they will leave conductive residue). Moisture should be allowed to evaporate or accelerated with a heat-gun (use
low heat and be carefully to not melt connector materials). Moisture intrusion into the
molded portion of the connector (capillary action into the wire bundle) or the Shear
Pin Load Cell itself will require replacement of the sensor.
6. One of the Shear Pin Load Cells has been mechanically damaged (yielded). Any
Shear Pin Load Cell that is physically deformed or has damage to one of the stainless steel covers should be replaced immediately. It is also possible to have invisible
mechanical damage resulting from an extreme overload (>4200lbs [>1900kg] for
1.25 in diam.; >5700 lbs or 2600 KG for 2 inch diam.). This can be detected by supporting the platform with an overhead crane and by removing the suspect sensor (no
weight resting on the Shear Pin Load Cell). Examine the sensor’s reading using the
JLG Analyzer. Proceed to the DIAGNOSTICS, CELL 1-4, LOAD displays and observe
whether the unloaded sensors read with +
Replace sensors that read excessive force when physically unloaded.
7. The LSS Module is suspect. Interchange the Shear Pin Load Cell connections (J5J8) and observe the results via the JLG Analyzer. Proceed to the DIAGNOSTICS,
CELL 1-4, LOAD displays and observe the readings. If the problem seems to remain
with a particular sensor, carefully re-examine the issues above. If the problems
seems to remain with a particular LSS Module channel, substitute another module.
2lbs (±1kg) (without the influence of vibration or wind).
15lbs (±7kg) of zero (individually).
3124288– JLG Lift –5-7
SECTION 5 - SERVICE - (LE, MRT, RTS, ES, RT)
Table 5-4. LSS Troubleshooting Chart - Host System Functionality
DifficultyPossible Resolution
The Visual and Audible Overload Warnings fail to sound
when platform is loaded
beyond Rated Load, or when
simulated by unplugging a
Shear Pin Load Cell from the
LSS Module. Controls remain
functional at Platform and
Ground Control positions.
The Host Control System is failing to regard the overload signal from the LSS Module, or
the signal is shorted.
1. The Load Sensing System must be enabled within the Host Control System. Plug
the JLG Analyzer into the Host Control System, enter the Access Level 1 password
(33271), and examine the MACHINE SETUP, LOAD sub-menu. The selection “CUTOUT PLT” should be displayed for European Community compliance (platform controls prevented during overload, ground controls remain operational). In country- or
customer-specific circumstance, the selection “3=CUTOUT ALL” is used (platform
and ground controls prevented during overload).
2. (LE, MRT and RTS) - The signal between the LSS Module and the Host Control System is shorted. The Platform Module’s J1-20 is an input, and it connected to the J15 output on the LSS Module To examine the status of this signal, plug the JLG Analyzer into the Host Control System, enter the Access Level 1 password (33271), and
examine the DIAGNOSTICS, SYSTEM, LOAD display. The display will indicate “OK”
when the Platform Module’s input is energized (approximately 12V), and “OVERLOADED” when it is de-energized (0V). Refer to the Wiring Diagram for Load Sensing System for details
3. Observe the LSS Module’s assessment of overload using the JLG Analyzer plugged
into the LSS Module’s connection. Proceed to the DIAGNOSTICS, OVERLOADED?
display. The display should indicate “OVERLOADED? N” when the platform is
empty, and “OVERLOADED? Y” when the platform is overloaded. If the assessment
is improper, the difficulty may be a result of a General or Measurement Performance
issue. Review the Possible Resolutions under those categories.
4. (LE, MRT and RTS) - If the LSS Module’s J1-5 Output does not appears to coincide
with the DIAGNOSTICS, OVERLOADED? display, then the LSS Module is suspect.
Substitute to determine cause of failure.
5-8– JLG Lift –3124288
Table 5-4. LSS Troubleshooting Chart - Host System Functionality
DifficultyPossible Resolution
The Visual and Audible Overload Warnings sound even
when the platform is empty.
Controls are prevented in the
same manner as when overloaded.
Controls remain functional at
the Ground Control position
during an overload, or when
simulated by unplugging a
Shear Pin from the LSS Module. The Control at the Platform
Control position are prevented.
SECTION 5 - SERVICE - (LE, MRT, RTS, ES, RT)
The LSS Module is un-powered, un-calibrated, or is experiencing a Measurement Performance difficulty. Alternately, the Host Control System is not receiving the proper signal from
the LSS Module.
1. Ensure that the LSS Module is powered. The LSS Module’s LED will be lit or flash if
the module is powered. If not, ensure that approximately 12V is present between J11 and J1-2 on the LSS Module (J1-1 is positive). Trace the Ignition and Ground supply wires into the Host Control System’s wiring harness using the wiring diagram to
locate the difficulty.
2. Plug a JLG Analyzer into the LSS Module’s connection and ensure that the Host
Control System is powered-up. When HELP:PRESS ENTER is displayed, press the
ENTER key on the Analyzer. If “EVERYTHING OK” is displayed, it is probable that
the Overload Signal from the LSS Module is not reaching the Host Control System.
This signal is present on LSS Module’s J1-5 and is approximately 12V normally, and
0V during an overload. This signal eventually reaches the Main Terminal Box to provide the overload signal. Refer to the Wiring Diagram for wire color, number, and terminal information.
3. (LE, MRT and RTS) - If the Analyzer displayed “OVERLOADED” in the previous step,
press the ENTER key again. If “NO CAL” is displayed, the Load Sensing System has
not been properly calibrated. Refer to the Calibration portion of this manual.
4. If another fault is displayed, refer to the portion of this manual that describes Fault
Messages and their causes.
5. The difficulty may be a result of a Measurement Performance issue. Review the Possible Resolutions under those categories.
The Host Control System is configured to prevent platform controls only in the event of
overload (as required for EN280 compliance). Alternately, the Host Control System can be
configured to prevent ground and platform controls for country- or customer-specific circumstances.
Plug the JLG Analyzer into the LSS Module’s connection and enter the Access Level 1
password (33271). Proceed to the MACHINE SETUP, LOAD sub-menu. Set this parameter
to “CUTOUT PLT” to prevent platform controls in the event of overload. Set this parameter
to “CUTOUT ALL” to prevent platform and ground controls in the event of overload.
3124288– JLG Lift –5-9
SECTION 5 - SERVICE - (LE, MRT, RTS, ES, RT)
Figure 5-2. LSS Module Load Cell Connector
Pinout (J5, J6, J7, J8)
NOTE: Physical connector as viewed looking into the
cable end
Table 5-5. LSS Module System Interface Connector -
Power & Digital (J1 - Grey)
PinSignalDescription
1VBATPos itive Power Supply from Host Control System
(12-24V)
2GNDNegative Power Supply from Host Control System
The platform load sensing system is intended to prevent
machine operation in the event that the platform is overloaded. Machine operation does not return until the platform 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.
6.2CALIBRATION (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 Analyzer 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.
Table 6-1. Platform Calibration Weight - RS
MACHINECALIBRATION WEIGHT
1932RS/6RS550 lbs. (250 Kg)
3248RS/10RS775 lbs. (352 Kg)
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 Analyzer 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 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 ofthis manual). Press ESC to return to the top level
menu.
3124288– JLG Lift –6-1
SECTION 6 - SERVICE - (RS)
6.3TESTING AND EVALUATION (RS)
Refer to the troubleshooting section of this manual if the
Load Sensing System fails to meet these guidelines.
1. Park the vehicle on a level surface. The platform
should be fully stowed and level within +/- 0.5
degrees (both directions).
2. Ensure Pressure Transducers work appropriately.
Proceed to the DIAGNOSTICS, LOAD submenu and
ensure that PRES1 and PRES2 are within 10 PSI of 0
with the platform stowed. Engage lift up from the
ground panel and ensure that the PRES1 and
PRES2 readings begin to increase as the machine
elevates.
3. Ensure the Angle Sensor works appropriately. Proceed to the DIAGNOSTICS, ANGLE submenu and
ensure that ANGLE, ANGLE increases as the
machine elevates and decreases as the machine
descends.
4. Confirm Host Control System Warnings and Interlocks and Load Sensing System Performance with
Calibrated Weights. Using the vehicle’s key switch
select ground mode and power-up. Ensure that all
controls are functional and the Load Sensing Systems Visual and Audible Warnings are not active.
Engage lift up from the Ground Panel until the platform reaches maximum elevation, and then engage
lift down from the Ground Panel until the platform
becomes stowed. Ensure that the Overload Visual
and Audible alarm did not activate at either control
position during this procedure. Ensure that the Load
Sensing System activates with 120% rated load
placed in the center of the platform. With the platform stowed engage lift up with 120% rated load
placed in the center of the platform ensuring that the
Load Sensing System activates within the ranges
listed in the following table. Ensure that the DIAGNOSTICS, LOAD, OVERLOADED submenu reads
YES. The Overload Visual Warning should flash at
the selected control position and the Audible Warning should sound for 5 seconds On and 2 seconds
Off. With the machine On all platform movement
should be prevented. Cycle the Ground Panel Emergency Stop button. The Overload Visual and Audible
Warning should continue. Pull the manual descent
lever until the platform becomes stowed. The Overload Visual and Audible Warnings should cease and
all normal control function should return.
Table 6-2. System Activation Height - RS
MACHINESYSTEM ACTIVATION HEIGHT
1932RS/6RS4.92 - 8.20 ft. (1.5 - 2.5m)
3248RS/10RS8.20 - 11.48 ft. (2.5 - 3.5m)
6-2– JLG Lift –3124288
6.4LSS TROUBLESHOOTING (RS)
The following tables are furnished to provide possible resolutions for common difficulties.
Table 6-3. LSS Troubleshooting - RS
PROBLEMPOSSIBLE RESOLUTION
JLG Analyzer displays "MAX NOT IN
RANGE" after the step "LIFT TO MAX"
during Angle Calibration
JLG Analyzer displays "MAXANGLE
TO HIGH" after the step "LIFT TO MAX"
during Angle Calibration
JLG Analyzer displays "LOW NOT IN
RANGE" after the step "LOWER TO
STOWED" during Angle Calibration
JLG Analyzer displays "MINANGLE
TOO LOW" after the step "LOWER TO
STOWED" during Angle Calibration
JLG Analyzer displays "CAL FAIL!" at
any time during the ANGLE calibration.
JLG Analyzer displays "INVALID
RANGE" after the step "LOWER TO
STOWED"
JLG Analyzer displays "NOT IN GND
MODE" when attempting to perform a
LOAD Calibration
JLG Analyzer displays "CAL ANGLE"
when attempting to perform a LOAD
Calibration.
The Angle Sensor’s upper limit is not acceptable. The Angle Sensor’s reading
must fall within +/- 35 counts of 210 counts when the platform is at maximum elevation.
1. Check the Angle Sensor to ensure that it is installed properly and that no
debris has become lodged around the Angle Sensor lever arm.
2. Ensure that the lever arm is installed properly and is not damaged.
The Angle Sensor's reading when the platform is at maximum elevation was
greater than 245 counts. The Angle Sensor's reading when the platform is at maximum elevation must be a number less than or equal to 245 counts.
1. Check the Angle Sensor to ensure that it is installed properly and that no
debris has become lodged around the Angle Sensor lever arm.
2. Ensure that the lever arm is installed properly and is not damaged.
The Angle Sensors lower limit is not acceptable. The Angle Sensor’s reading
must fall within +/- 35 counts of 40 counts when the platform is stowed.
1. Check the Angle Sensor to ensure that it is installed properly and that no
debris has become lodged around the Angle Sensor lever arm.
2. Ensure that the lever arm is installed properly and is not damaged.
The Angle Sensor's reading when the platform is stowed was less than 5 counts.
The Angle Sensor's reading when the platform is stowed must be a number
greater than or equal to 5 counts.
1. Check the Angle Sensor to ensure that it is installed properly and that no
debris has become lodged around the Angle Sensor lever arm.
2. Ensure that the lever arm is installed properly and is not damaged.
The technician has pressed ESC on the Analyzer during the calibration routine or
the Angle Sensor’s Range with the platform stowed to the platform at maximum
elevation was not acceptable.
1. ESC was accidentally pressed during the Calibration procedure. The previously calibrated values will not be lost. Attempt ANGLE calibration again.
2. Check the Angle Sensor to ensure that it is installed properly and that no
debris has become lodged around the Angle Sensor lever arm.
3. Ensure that the lever arm is installed properly and is not damaged.
The sensors range from stowed to maximum height was not acceptable.
1. Check to ensure that the Angle sensor is mounted properly.
2. Ensure that the angle sensors lever arm is still functioning properly and is
not broken.
The machine is not in Ground Mode.
1. Re-attempt LOAD Calibration after setting the key switch to the Ground
Control position.
The Angle Sensor has not been calibrated.
1. The Angle Sensor must be calibrated before a LOAD calibration can occur.
Enter the CALIBRATIONS menu and perform an ANGLE calibration.
SECTION 6 - SERVICE - (RS)
3124288– JLG Lift –6-3
SECTION 6 - SERVICE - (RS)
Table 6-3. LSS Troubleshooting - RS (Continued)
PROBLEMPOSSIBLE RESOLUTION
JLG Analyzer displays "MOTION
STOPPED" after the LOAD calibration
steps "LIFT TO MAX ELEV" or "LOWER
TO STOWED".
JLG Analyzer displays "CAL FAIL!"
when attempting to perform a LOAD
Calibration.
The Visual and Audible Overload
Warnings fail to sound when platform
is loaded beyond rated load. Controls
remain functional at Ground and Platform Control Positions.
The Visual and Audible Overload
Warnings sound even when platform
is empty. Controls are prevented in the
same manner as when overloaded.
Controls remain functional at the
Ground Control position during an
overload.
The Control at the Platform Control
positions are prevented.
The platform stopped moving during LOAD calibration.
1. The technician let go of the lift up switch before the machine reached maximum elevation during "CAL LOAD: LIFT TO MAX ELEV" or the technician
let go of the lift down switch before the machine became stowed after the
"CAL LOAD: LOWER TO STOWED" step. Re-attempt LOAD calibration
making sure not to disengage the lift up and lift down switch during these
steps.
The technician has pressed ESC on the Analyzer during the calibration routine.
1. ESC was accidentally pressed during the Calibration procedure. The previously calibrated values will not be lost. Attempt LOAD calibration again.
The Load Sensing System is failing to detect that an overload condition exists or
the Load Sensing system has not been enabled.
1. The Load Sensing System must be enabled within the Host Control System. Connect the JLG Analyzer and enter the Access Level 1 Password
(33271). Navigate to MACHINE SETUP, LOAD submenu. The selection
"CUTOUT PLT" should be displayed for European Community Compliance
(platform controls prevented during overload, ground controls remain
operational). In country- or customer-specific circumstances, the selection
"CUTOUT ALL" is used (platform and ground controls prevented during an
overload).
2. The Load Sensing System requires re-calibration. If the Load Sensing System fails to detect an Overload with 120% load placed in the platform perform an ANGLE calibration followed by a LOAD calibration as specified by
the Calibration procedures listed in this document.
3. If a fault is displayed, refer to the portion of this manual that describes
Fault Messages and their causes.
The Load Sensing System has not been calibrated or is experiencing a measurement performance difficulty.
1. The machine is assumed to be overloaded until the Load Sensing System
has been calibrated. Navigate to the CALIBRATIONS menu and perform
an ANGLE calibration followed by a LOAD calibration.
2. The Load Sensing System requires re-calibration. If the Load Sensing System falsely detects an Overload with less than rated load placed in the
platform perform an ANGLE calibration followed by a LOAD calibration as
specified by the Calibration procedures portion of this manual.
3. If a fault is displayed, refer to the portion of this manual that describes
Fault Messages and their causes.
The Host Control System is configured to prevent platform controls only in the
event of overload. Alternately, the Host Control System can be configured to prevent ground and platform controls for country- or customer-specific circumstances.
1. Plug the JLG Analyzer in and enter the Access Level 1 password (33271).
Proceed to the MACHINE SETUP, LOAD sub-menu. Set this parameter to
"CUTOUT PLT" to prevent platform controls in the event of overload. Set
this parameter to "CUTOUT ALL" to prevent platform and ground controls
in the event of overload.
6-4– JLG Lift –3124288
6.5LSS COMPONENT REMOVAL/
1
2
3
1
2
3
INSTALLATION (RS)
Pressure Transducer Removal (RS)
(See Figure 6-1. and Figure 6-2.)
Use the following procedure to safely remove and repair
the pressure transducers on the lift cylinder.
1. Ensure that the key switch is set to ground mode.
2. Engage lift up from the ground panel until the platform has elevated high enough to engage the lift cylinder safety prop.
3. Engage the platform safety prop.
4. Lower the platform on to the safety prop and continue to engage lift down for 1 second after the platform makes contact with the safety prop.
5. Disconnect power at the batteries.
6. Carefully disconnect the electrical connectors on
each sensor.
7. Remove each pressure transducer.
Pressure Transducer Installation (RS)
1. Insert new pressure transducer and tighten.
2. Reconnect each pressure transducers electrical
connector.
3. Reconnect power at the batteries.
4. Turn machine on and engage lift up from the ground
panel so that the safety prop can be disengaged.
5. Lower the platform to the stowed position.
6. This completes pressure transducer repair.
SECTION 6 - SERVICE - (RS)
Figure 6-1. LSS Pressure Transducer Location -
1932RS/6RS
1. Ports On Barrel of Cylinder
2. Pressure Tran sdu cer s
3. Harness Connectors
Figure 6-2. LSS Pressure Transducer Location -
3248RS/10RS
1. Ports On Bottom of Cylinder
2. Pressure Transducers
3. Harness Connectors
3124288– JLG Lift –6-5
SECTION 6 - SERVICE - (RS)
10RS Angle Sensor Removal (RS)
(See Figure 6-1. and Figure 6-2.)
1. Ensure that the platform is stowed and the machine
is on level ground.
2. Disconnect power at the batteries.
3. Locate the Angle Sensor at the back of the machine.
4. Disconnect the Angle Sensor’s electrical connection.
5. Remove the Angle Sensor.
10RS Angle Sensor Installation (RS)
1. Install the Angle Sensor with the mounting hardware.
2. Reconnect the Angle Sensor’s electrical connector.
3. Reconnect power at the batteries.
4. Recalibrate the machine’s Angle Sensor.
5. Recalibrate the machine’s Load Sensing System.
6RS Angle Sensor Removal (RS)
1. Ensure that the key switch is set to ground mode.
2. Engage lift up from the ground panel until the platform has elevated high enough to engage the lift cylinder safety prop.
3. Engage the platform safety prop.
4. Lower the platform on to the safety prop and continue to engage lift down for 1 second after the platform makes contact with the safety prop.
5. Disconnect power at the batteries.
6. Disconnect the Angle Sensor’s electrical connection.
7. Remove the Angle Sensor.
6RS Angle Sensor Installation (RS)
1. Install the Angle Sensor with the mounting hardware.
2. Reconnect the Angle Sensor’s electrical connector.
3. Reconnect power at the batteries.
4. Turn machine on and engage lift up from the ground
panel so that the safety prop can be disengaged.
5. Lower the platform to the stowed position.
6. Recalibrate the machine’s Angle Sensor.
7. Recalibrate the machine’s Load Sensing System.
1932RS/6RS3248RS/10RS
1. Platform Gate
2. LSS Scissor Arm Angle Sensor (rear plate shown cutaway)
3. Platform Entry Ladder
6-6– JLG Lift –3124288
Figure 6-3. LSS - Scissor Arm Angle Sensor - (RS)
1. Elevation Limit Switch Location
2. LSS Scissor Arm Angle Switch (scissor arms shown cutaway)
3. Platform Entry Ladder
LSS Connector Pin Assignments (RS)
SECTION 6 - SERVICE - (RS)
Table 6-4. Connections to Host Control System
(J1-Black) (RS)
PINSIGNALDESCRIPTION
1PRES1Pressure Transducer 1 Input (0-5V)
2PRES2Pressure Transducer 2 Input (0-5V)
16PPRES Pressure Transducers Analog Reference (0-5V)
17NPRES Pressure Transducers Negative Reference
Table 6-5. Connections to Host Control System
(J2-Blue) (RS)
PINSIGNALDESCRIPTION
5CANLCANbus Low
6CANHCANbus High
15CANSCANbus Shield
22NOVLNagative for Overload Lamp (Low-Side Driver)
FIGURE 7-1. LOAD SENSING SYSTEM INSTALLATION (260MRT, M3369/M4069
LEFT FRONT
PLATFORM
SLIDE BLOCK
LEFT REAR
PLATFORM
SLIDE BLOCK
RIGHT FRONT
PLATFORM
SLIDE BLOCK
RIGHT REAR
PLATFORM
SLIDE BLOCK
TO
ANALYZER
GROUND
CONTROL
BOX
INDICATOR
LIGHT
TO
LOAD
SENSE
POWER
SUPPLY
PLATFORM
CONTROL
BOX
INDICATOR
LIGHT
7
7
7
7
29
29
29
29
29
292929
18
18
18
18
20
20
20
20
20A
20A
20A
20A
20B
20B
34B
34B
10
4
15
20B
34A
20B
34
34
33A
32A
32B
32
LE MACHINES
LE MACHINES
LE MACHINES
MRT MACHINES
LE MACHINES
LE MACHINES
20
20
33
159
33D
33C
33B
& 3369LE/4069LE)
7-2– JLG Lift –3124288
.
FIGURE 7-1. LOAD SENSING SYSTEM INSTALLATION (260MRT, M3369/M4069 & 3369LE/4069LE)
FIG & ITEM #PART NUMBERDESCRIPTIONQTY.REV.
LOAD SENSING SYSTEM INSTALLATIONRef.
0272964260MRT (Platform without D-Rings)Ref.F
0272965260MRT (Platform with D-Rings)Ref.E
0272930E/M3369/4069LE (Platform without D-Rings)Ref.I
0272931E/M3369/4069LE (Platform with D-Rings)Ref.I
1 to 3Not Used
4Bolt Options:3
0641405Prior to S/N 0200120066
0641415S/N 0200120066 to Present
5 to 6Not Used
7Bolt Options:4
260MRT:
0641636Bolt 3/8”-16NC x 4 1/2” (Prior to S/N 0200124148)
0701029Bolt (Metric) M10 x 120mm (S/N 0200124148 to Pres-
ent)
E/M3369/4069LE:
3931648Capscrew 3/8”-16NC x 3” (Prior to S/N 0200124146)
4032022Capscrew (Metric) M10 x 90mm (S/N 0200124146 to
Present)
8 to 9Not Used
10Module, Load Sensing Options:1
1600350Prior to S/N 0200120066
1600387S/N 0200120066 to Present
11 to 14Not Used
153311405Locknut 1/4”-20NC3
16 to 17Not Used
18Locknut Options:4
3311605Locknut 3/8”-16NC (Prior to S/N 0200124146)
3291005Locknut (Metric) M10 (S/N 0200124146 to Present)