Est SCR DPF
Est SCR DPF
TIER IV SCR
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Notes
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Contents
Controller Status ................................................................................. 4
Monitor .............................................................................................. 6
Programming...................................................................................... 9
Additional Tools ................................................................................ 13
Configuration.................................................................................... 15
Engine Derate Status ................................................................... 16
Engine Restart Counter Reset ........................................................ 18
Controller Tests ................................................................................ 19
UDST (Urea Dosing System Test) ..................................................... 20
Overview .................................................................................... 20
Test Instructions ......................................................................... 21
Testing Specifics .......................................................................... 22
Urea System Emptying Routine ........................................................ 28
UREA SYSTEM FLUSHING ROUTINE ................................................... 30
SCR System Troubleshooting .............................................................. 32
System is OK in Hydraulic Point of View ............................................. 32
Air in Urea System ......................................................................... 33
Leakage and Low UREA Injection ...................................................... 34
UREA Leakage in High Pressure Part ................................................. 35
No or Too Little UREA Injection......................................................... 36
UREA Evacuation Failed ................................................................... 37
No UREA Pressure Build Up Possible .................................................. 38
Pressure Line Clogged ..................................................................... 40
Pump Not Working.......................................................................... 41
UREA Reverting Valve Defect ........................................................... 42
Obstructed Throttle ........................................................................ 43
Tubes Interchanged at UREA Tank .................................................... 44
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Controller Status
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NOTE: File version is saved as ".ver" file. Open file as "Notepad" to view saved
information.
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Monitor
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6. Select the EXIT Icon when the desired list of parameters has been selected.
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Note this is an example of the SCR TIER IV parameters that can be monitored.
*** The Monitor icon will monitor specific Tier IV SCR and engine parameters.
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Programming
3. Turn the Key "OFF" and wait 30 seconds, then turn key "ON" and wait 30
seconds. When this is completed, click on the OK
Button.
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4. Click on Browse and highlight the proper dataset by clicking on it. Select OK.
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5. Select PROGRAM DOWNLOAD. DO NOT place a "check mark" in the box next
to "Program boot code too"
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7. Once the download has completed the following indicators will be present.
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Additional Tools
The Easy Engine Tool for Tier IV applications is found under the Additional Tools tab
on the main EST screen.
NOTE: A warning icon will appear. Due to the instability of the EASY-DCU15 program it
is recommended to use the base EST software for diagnostic and downloading of the
Denoxitronic Control Unit(DCU15).
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Configuration
The Configuration icon allows the EST to send model specific or customer preference
values to certain controllers. This icon also allows the EST operator to access certain
controller calibration menus.
Each of the Configuration processes has instructions advising the EST operator “How
To Use” each of the configurations.
The Tier IV Wheel Loaders, both NHCE and Case, have many added features in the
Configuration Menu. The configuration options are:
Engine Derate Status
Engine Restart Counter Reset
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With the release of Electronic Service Tool (EST), version 6.4.0.0, there are two new
features specific to the Tier 4 applications which will be helpful for diagnosing the
Selective Catalyst Reduction (SCR) system.
The 6.4.0.0 version of Electronic Service Tool (EST) has the capability of monitoring the
output signal of the Nitric Oxide (NOx) sensor mounted in the exhaust stream, and can
also be used to view derates or inducements the Engine Control Unit (ECU) is
commanding during engine operation.
Within this window you have the option to save the parameter observations within a file,
retrieve a previously saved file for viewing or observe the current active derate data with
the current parameters for the following functions.
NOTE: Depending on the engine design, not all options may be available.
Calculated Exhaust Gas Temperature (EGT)
Smoke Quantity
NOx Measured at sensor
eVGT Position Feedback (electrical Variable Geometry Turbocharger)
VGT-Position Command for eVGT
VGT-Boost Target Deviation
VGT-Turbo Speed Limit Deviation
VGT-Control Mode
VGT-Firing Mode Defect States
Turbo Charger Speed
The Derate status will display the “Active Derate” with a value and a description, the
example shows a “Smoke map limitation (normal during transit throttle operation).”
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Functionality
The NOx sensor signal can be very useful when viewed within the Engine Derate Status
function. This is the only place you can obtain the measurement from the NOx sensor.
The NOx sensor will indicate a value of 500 parts per million (ppm) when static.
As the exhaust temperature rises, the SCR system will start to inject DEF/AdBlue into
the exhaust stream. The measured NOx will change from its warm-up value of 500 ppm
to a lower number (typically in the range of 250-270 ppm). The lower NOx measured at
the sensor signifies that the system is operating and controlling the NOx emissions from
the engine.
New developments in regards to EST functionality and parameter nominal values will be
explained as information becomes available.
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The Engine Restart Counter Reset feature is used for Tier IV machines. When the
Tier IV engine suffers a severe inducement(derate) from one of several factors the
engine will be reduced to 50% of max torque and 60% of max engine speed.
When the key switch is cycled ON -OFF, the machine torque and engine RPM will be
restored for 30 minutes. After 30 minutes the severe inducement is resumed. This is
considered an emergency Restart.
There are three attempts(Restarts) allowed. After the third Restart whenever the key is
cycled ON-OFF the engine will resume the severe inducement immediately.
Only the technician using the EST can reset the counter to allow 3 additional Restarts.
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Controller Tests
There are three tests that can be used by the technician for service and diagnostic
troubleshooting on the Tier IV SCR system.
Urea Dosing System Test (UDST)
Urea System Emptying Routine
Urea System Flushing / Cleaning Routine
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Overview
The Urea Dosing System Test (UDST) is used to test if the dosing system
components are installed correctly and are functioning. This is very helpful
test which will provide a visual graph and text document describing the
pressures/speeds and operation of the components during the test. The test
take approximately 3 minutes to complete.
The document and graph can be very useful when troubleshooting the
system when a specific portion of the test fails. The test tool display “PASS”
or “FAIL” at the conclusion of the test.
Internal to the text document you can observe each test (multiple tests are
performed during the cycle) that passes or fails. There are 5 tests that occur
within the UDST, each test will have a “minimum test value” or “maximum
test value” that can either pass or fail. Some tests will have additional values
which are tested, totaling 11 individual test results.
DO NOT run the UDST more than 5 times while testing. Damage of the
catalyst can occur due to accumulation of urea on the catalyst if you run
UDST more than 5 times. To avoid damage you must burn off the urea prior
to re-running the UDST. To burn off the urea, run the engine at rated power
for 15 minutes or make sure the upstream SCR temperature reaches more
than 350 C° (660 F°) for several minutes.
After the UDST has completed the system will not run a “emptying” cycle
that you normally observe after the key switch is turned off. If the unit is in
cold weather, you need to run the system emptying routine also available on
the Electronic Service Tool (EST).
The UDST should be ran as a “static” test with the engine not running. Other
conditions which need to be considered to provide accurate and reliable test
results.
• Urea tank temperature is greater than 5 C° (41 F°)
• Adequate battery voltage (above 20 volts on 24 volts system/above 10
volts on a 12 volt system)
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Test Instructions
1. Stop Engine, Turn Key Switch to ON.
2. Press START TEST on service tool to begin the test.
3. Wait for the routine to finish. The routine will require a couple minutes
to run.
4. The service tool will display PASS or FAIL at the bottom of the screen.
5. Press the TROUBLESHOOTING button to details about resolving issues.
ABORT - Press abort if required to halt the routine and turn OFF the urea
system device commands.
SAVE DATA TO FILE - Press SAVE to store the test results to a file for
sharing data with CNH.
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Testing Specifics
(Detailed diagnostic information was provided by FPT)
The UDST can provide valuable testing results, below is the graph you will
typically observe when the UDST has passed this test. Each line within the
graph represents a speed, pressure or duty cycle (percentage).
During the pump speed test, the pump duty cycle (blue line) is verified three
times for the appropriate change.
Test point #1 looks for a 50% change in duty cycle (change from 0%
to 50%)
Test point #3 looks for a 50% change in duty cycle (change from 50%
to 0%)
Test point #2 uses the results from test #1 and #3 to determine test
functionality.
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Test #4 is the throttle test and is started immediately after Test #3 and runs
for 15 seconds. This test looks for the pressure differential from the start
and end of the test.
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Test #7 is the evacuation test and is the last test that the UDST will
complete, this test verify the pump has the capabilities to evacuate the
system. The pump will generate a vacuum once the reverting valve duty
cycle has changed from 100% to 0%.
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The DCU15 will purge the DEF fluid from the system every time the ignition
key switch is turned to the "OFF" position. The technician can use the EST
to simulate this occurrence and check for proper operation.
This is not a test. The Urea System Emptying Routine can be used to
verify that the SCR system is properly purging the DEF fluid from the
system. This test can also be used to check for leaks in the system as the
pressure of the DEF fluid must drop between -50 and -300 mBar during the
evacuation process.
Test Instructions
1. Stop Engine, Turn Key Switch to ON.
2. Press START TEST on service tool to begin the routine.
3. Wait for the routine to finish. The routine will require a couple minutes
to run.
ABORT - Press abort if required to halt the routine and turn OFF the urea
system device commands.
SAVE DATA TO FILE - Press SAVE to store the operating data to a file for
sharing data with CNH if requested.
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This is not a test. The flushing routine is used to circulate fluid through
the urea lines without injecting urea. This routine can be used to clean the
urea lines, especially after disassembling the system. It is recommend to
flush the system for 2-4 minutes (even though the trace below only shows
flushing for 60 seconds).
After running the FLUSHING routine, then run the EMPTYING routine before
turning the key switch OFF.
Test Instructions
1. Stop Engine, Turn Key Switch to ON.
2. Press START TEST on service tool to begin the routine.
3. Press STOP on the service tool to end the routine.
4. Run the EMPTYING routine before turning the key switch OFF.
Note: This routine will run until the user presses STOP.
STOP - Press stop if required to halt the routine and turn OFF the urea
system device commands.
SAVE DATA TO FILE - Press SAVE to store the operating data to a file for
sharing data with CNH if requested.
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A typical trace will look similar to the following. If the trace is significantly
different than this reference trace, then run the "Urea Dosing System Test
(UDST)" and follow the UDST troubleshooting to resolve the issue.
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Obstructed Throttle
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TIER IV
F5H Engine
DPF System
Electronic Service Tool
Introduction
Starting January 1, 2012 all off-highway diesel engines must be Tier 4a / Tier IV interim
complaint.
CNH has chosen to use Cooled Exhaust Gas Recirculation(CEGR) in combination with
a Diesel Particulate Filter(DPF) to meet these strict emissions requirements on
machines under 100HP.
The new engine used in CE equipment is the FPT F5H 4.2L engine. This is an
electronic engine using the latest common rail technology.
With the introduction of the engine comes new technolgies available on the Electronic
Service Tool(EST). The EST will be used by the service technician for various
Additional function to be added that are not currently in the EST 7.2.0.0. (adding with 7.3.0.0)
Replacement of the Exhaust Gas Recirculation Valve (EGR) ‐ Reset ECU Data
o The dealer will need to make a reset after EGR replacement, before returning the
machine to the customer the engine will need to warm up to 65+ C° (149 F°)
degrees (engine coolant temperature) and verify there are no engine fault codes
present within the ECU.
Additional function to be added that are not currently in the EST 7.2.0.0. (adding with 7.4.0.0)
Controller Status
After the equipment and connector is selected and connected, the EST will
default to the Controller Status screen. The Controller Status can always be accessed
by clicking on the icon.
This screen is used to determine whether a controller is connected to the CAN bus and
communicating, the hardware and software versions of the controllers, and also detailed
controller version information can be viewed by clicking the appropriate button at the
bottom of the screen.
Fault codes from all available controllers are accessed through the Retrieve
Controller Faults icon. Note that the only the VCM communicates fault codes to the
EST. Faults originating from the ECU or TRAX controllers are sent to the VCM via CAN
bus, then the VCM establishes the four digit fault code number and sends the fault code
to the EST for technician troubleshooting.
While both of these choices will access the exact same controller (the VCM), there are
some slight differences between these two choices.
If fault codes are present they will show on the screen with information including:
Whether the code is active (currently occurring) or not active (previously occurred)
The current hour meter reading will be displayed at the top of the screen as a reference
comparison.
VIEW LIST OF DEFINED FAULTS will bring up a list of all of the known faults
that the VCM recognizes. Double-clicking the fault code from the list will go to
the Troubleshoot Problem page for that fault code, as well as clicking the
TROUBLESHOOT PROBLEM button at the bottom. Click on Exit to return to the
previous screen. Note that all 1xxx faults originated from the VCM, all 3xxx faults
originated from the ECU, and all 4xxx faults are from the TRAX transmission
controller.
CLEAR CONTROLLER FAULTS will clear the fault memory of the VCM after
clicking on a verification window.
REFRESH will cause the EST to take another look at the fault status. Fault
codes are not shown in real time, and it is necessary to keep pressing the
REFRESH button if waiting to see if a fault code status changes.
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Much of this information is the same as the previous selection, but there are a few
additional buttons at the bottom of the screen.
OPEN FILE FROM DISK - open a previously saved file to view fault information
which occurred in the past.
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Monitor Parameters
Monitoring parameters is one of the most valuable aspects of the EST. When
diagnosing problems with any of the systems which are run through electronic
controllers, the ability to see the inputs and outputs of each of the electronic controllers
is very important. Clicking on the Monitor Parameters icon will bring up this screen.
First, the technician must select the parameters to be monitored by the EST by clicking
on the CHANGE PARAMETER SELECTIONS button.
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There are two types of parameters which are shown by two different icons at the left
side of the parameter name.
The gauge icon is for parameters which are a variable reading such as
temperature or sensor signal voltage.
This icon is for parameters which are simply on or off such as a pressure
switch or dash switch.
After selecting the desired parameters (as many as desired), click the EXIT button. This
will return to the previous screen, and now the selected parameters will be displayed
with the values seen by the controllers in real time. The example below is not
connected to a machine, so no parameter values are shown.
The selected parameters can be monitored over time and saved to a text file by clicking
the LOG PARAMETER SELECTIONS button. This will bring up an additional set of
buttons at the upper right of the screen.
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Click the SETTINGS button to set up how the parameter should be logged.
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Programming
The controller may need software downloaded when installing a new controller, to
update the controller software to a newer version, or to correct a corrupted software
issue. Clicking the View Controller Information button at the right side will show the
current software version information, which can be referenced and compared with
newer available versions.
To download software to the VCM or TRAX transmission controller, first click the SET
UP CONTROLLERS FOR DOWNLOADING button. This will bring up the following
dialog box:
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Turn the key off, waiting for at least 5 seconds after the VCM screen goes blank, then
turn the key back on and click the OK button.
If completed successfully, the capture icon is displayed next to the controller, indicating
that the controllers are ready to be programmed. Additionally, the VCM LCD display will
be blank, with only the yellow exclamation point telltale light flashing constantly.
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Next click the Browse button to select the software file to download.
The EST will default to the correct folder containing the latest software file for the
selected controller. Note that the folders can be navigated like any typical windows
based program and a file can be selected from another source, such as a USB memory
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The EST will then bring up a dialog box verifying the file selection. Click the OK button
if this is correct.
The selected file name will now be present in the Download File Selection bar. Click the
BEGIN DOWNLOAD button to start downloading the software to the controller. A dialog
box will come up asking to verify the action. Click the OK button.
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This will be followed by a dialog box indicating the success or failure of the download.
Click OK when complete.
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After completion, it may be necessary to turn the key off, then back on if prompted by
the EST to do so in order to return the controllers back out of the programming mode.
In this example, software was downloaded to the VCM of an M series 3 loader backhoe.
The process is identical for the N series, and also for downloading software to the TRAX
transmission controller. On the N series, when downloading software to the TRAX
controller, the correct software must be selected for the Powershift S-type or H-type
transmissions.
On Tier 4 models, the ECU software for the engine electronic controller is also
downloaded from the Programming screen, but the process is different. Refer to ASIST
knowledge for detailed instructions on downloading engine datasets.
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Additional Tools
The Additional Tools icon contains access to the EASY engine tool, a separate
program used for engine diagnosis, parameter monitoring, fault code information and
more. When dealing with an engine problem, the EASY engine tool is the primary
electronic tool the technician will use for engine diagnosis.
Click on the Start the Easy Engine Diagnostic and Download Tool button to open this
separate program.
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Configurations Icon
The configuration icon is used by the technician to send model specific features
and customer preferences to the controllers of the machine. On the new Case N series
Tier 4 machines, several new service related features are now included which were not
previously seen.
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Each time the ignition key is turned on the ECU sends a code to the VCM based on the
dataset software that is loaded. The VCM checks this code against its stored value. If
they match, all is OK and the engine operates normally. If they do not match, the VCM
will command an engine rpm and torque de-rate as well as a 3158 fault code. If the
VCM never receives the code, fault code 3157 and engine de-rate will result. If the
ECU or VCM is replaced, or a new dataset is loaded into the ECU, it will be necessary
to register the new dataset with the VCM by using this feature in the EST.
Click on the START button to begin the process. A pop-up box will appear asking you
to verify the action. Click the OK button. After clicking the OK button, the screen will
show the process, which may take several minutes to complete. In this example screen
shot, the dataset was already registered with the VCM, so the process is completed
early.
When the process is complete, click the EXIT button to return to the main Configuration
screen.
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Tips:
The Injector Code is located on the injector body as shown in the photos below. The location and
format of the code is different for different engine types.
The injector code values only allow certain alpha/numeric characters in the code. A couple of the most
common "typo" errors are the following.
The injector codes will never include the number zero. These are the letter "O".
The injector codes can have both the letter "I" and the number "1", so pay attention.
The injector codes can have both the letter "B" and the number "8", so pay attention.
So if you read the wrong value from the injector or type the wrong value into the PC, then the code will
not pass the validity check and the following message will be displayed.
Instructions:
1. Before installing the injector, write down the Code for the new injector on a piece of paper. (It
is suggested to wait to install the injector until after performing the following process to avoid
the possibility of mistakes when copying the code to paper. )
2. Connect the EST and turn the key switch ON without starting the engine.
3. Press the “RETRIEVE DATA FROM CONTROLLER” button to read the current data.
4. In the “Modified” data column, enter the Code for the new injector into the box for the
appropriate injector number that will be replaced. If you are installing more than one injector,
then be sure to note which injector code is assigned to which injector number so that you
remember when you are installing the injectors. If you are installing more than one injector,
then you must enter data into more than one box.
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Example Photos:
NOTE: These Codes are examples only. The code for the injector on your engine will be different!
Injector Code for the 13L 2 Stage Turbo Engine in red box (EDC17CV41 engine controller):
‐ 10 digit value
Injector Code for the F5C Engine in red box (EDC17C49 engine controller):
‐ 7 digit value
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To view or enter the injector codes, click the RETRIEVE DATA FROM CONTROLLER
button if the fields do not populate. Enter any changed or new codes in the Modified
Values boxes, then click the SAVE DATA TO CONTROLLER button. Click the
INSTRUCTIONS button if further clarification is needed.
The injector codes are on the body of the injector itself, and also the original injector
numbers will be on a decal on back of the ECU housing.
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After a component is replaced reset the ECU by clicking on the appropriate item, then
clicking CONFIGURE SELECTED ITEM.
When the new window opens, click the RESET button. When the process completes,
exit back out of the window.
This reset procedure is identical for each of the other emissions components included in
the Configuration Items, including the Differential Pressure Sensor, Exhaust Gas
Recirculation Valve, Lambda Sensor, Oxidant Catalyst, and the Rail Pressure Relief
Valve.
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To reset the ECU, click on the RESET button, then exit the window when the process is
complete. The same engine oil / filter reset can also be accomplished through the VCM
navigation menus.
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Please be aware that this operation should only be performed with the machine parked
in neutral and the engine set at idle. Park Brake should be set if installed.
Engine speed will be automatically controlled during the test by the Electronic Control
Unit.
Caution: There will be hot exhaust gases and components during this test.
The Controller Tests icon is new for the N series Tier 4 loader backhoes. This feature
allows a technician to be able to force the engine controller into performing a Service
Regeneration. The Service Regeneration will cause the full Diesel Particulate Filter
regeneration to take place. This may be necessary in the event of operator misuse or
system faults which cause the ECU to not be able to complete the regeneration process
through normal means of passive, auto, or manual regeneration.
To begin the service regeneration, click on the START TEST button. In order for the
test to complete successfully, it will be necessary for the engine to be running and at
operating temperature before beginning the test. Also, the machine will need to be in a
safe area without combustible materials since the exhaust temperature will become very
hot during the procedure. A new window will open with instructions and status
information for the duration of the test.
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