AGRA-GPS CRG-Fendt User manual

INSTALLATION
MANUAL
CRG-Fendt Roof Bridge
CRG-Fendt
July 2022

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 ii
Contact information
Agra-GPS Ltd.
Box 2585
Stony Plain, AB
T7Z 1X9
CANADA
[phone]
www.agra-gps.com
Release Notice: This is the July 2022 release of the CRG-Fendt Installation Manual.
It is assumed that users of the products described herein have either system integration or technical
experience, as well as an understanding of the fundamentals of agricultural machinery.
Disclaimer
While every effort has been made to ensure the accuracy of this document, Agra-GPS Ltd assumes
no responsibility for omissions and errors. Nor is any liability assumed for damages resulting from
the use of information contained herein. Agra-GPS Ltd shall not be responsible or liable for
incidental or consequential damages or a loss of anticipated benefits or profits, work stoppage or
loss, or impairment of data arising out of the use, or inability to use, this system or any of its
components.
DO NOT USE THE CRG-FENDT IF YOU DISAGREE WITH THE DISCLAIMER.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 iii
Important Safety Information
Read this manual and the machine operation & safety instructions carefully before installing the
CRG. Refer to Appendix A for Product Specifications.
•Follow all safety information presented within this manual.
•If you require assistance with any portion of the installation or service of your equipment,
contact Agra-GPS for support.
•Follow all safety labels affixed to the system components. Be sure to keep safety labels in
good condition and replace any missing or damaged labels. To obtain replacements for
missing or damaged safety labels, contact Agra-GPS.
When operating the machine after installing the CRG, observe the following safety measures:
•Be alert and aware of surroundings.
•Do not operate the CRG system while impaired.
•Always remain in the operator’s position in the machine when the CRG system is engaged.
•Determine and maintain a safe working distance away from other individuals. The operator
is responsible for disabling the CRG system when a safe working distance has been
diminished.
•Ensure the CRG is disabled prior to starting any maintenance work on the machine or parts
of the CRG system.
•Follow all safety instructions from the Fendt machine as well as the John Deere system.
•The CRG must only be used in the field, never on public roads.
Electrical Safety
•Always verify that the power leads are connected to the correct polarity as marked.
Reversing the power leads could cause severe damage to the equipment.
•Verify that all cables and connectors are not in contact with sharp edges or anything that
could cause chafing, as this could result in power shorts and/or other malfunctions.
•Power is supplied to the CRG even when the key is off. Power can be removed in 3
different ways: 1) Remove the connector from the CRG, 2) Remove the fuse supplying
circuit power, or 3) Remove a battery lead while the machine is off.
Risk of Fire
•The circuit supplying 12 volt power for this product requires a fuse. The maximum fuse
rating is 5 amps, and the minimum is 1 amp.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 1 of 20
Introduction
Congratulations on your purchase of the CRG! The CRG (Fendt version) is designed to bridge the
communication between a Fendt tractor and a John Deere (JD) display (1800, 2600, 2630, 4240,
or 4640). This allows a JD display to create maps in the John Deere format, and also provides
autosteer functionality. The operator uses the JD display to create AB-lines or field documentation,
or to handle any other GPS system input.
The CRG contains a) an RTK-capable GPS receiver, AND b) a full steering controller capable of
steering a Fendt tractor with a John Deere display!
All conditions for autosteer such as minimum speed, steering enabled, etc., must be met by the
Fendt tractor before the autosteer engage option can be activated.
NOTICE
This manual is not intended to replace the manuals for the Fendt tractor nor the John Deere GPS
system. The operator must read and understand the manuals and instructions of these systems,
before using the CRG.
Components
The CRG-Fendt kit contains the following items:
1. CRG receiver
2. Harness to connect the John Deere display to the ISO in-cab connector of the Fendt tractor
3. Harness from the CRG to the X4250 roof connector for autosteer integration
4. Harness to integrate the CRG to a John Deere tractor as a receiver-only option

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 2 of 20
Pre-Install
(Optional): Install CRG SIM Card
If your CRG is equipped with an optional cellular modem, install the SIM card BEFORE
installing the CRG. Later on, the SIM card cannot be installed or changed without removing the
CRG from the tractor.
Refer to the CRG Modem Guide for further instructions.
Determine Mount Type
The CRG is designed to mount within the Fendt interior roof panel. However, if you wish to
mount the CRG outside instead, you will need a standard receiver mount.
NOTE: the CRG mounting bracket for JD mounts is not compatible with the shallow mount
type as shown below.
Not supported This style of external
mounting is usable
If using an external mount, install the CRG by placing the rear CRG mount groove in first, and
then pushing the entire unit towards the back. Pushing backwards will compress the springs and
allow the front groove to mate with the front of the external mount. After this, be sure to pull the
CRG forwards again to ensure the front groove is fully seated.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 3 of 20
Step 1: Install the CRG
1a) Open the Roof Panel
The CRG is installed in the roof above the main seat.
Removing the plastic cover, exposing the metal panel
behind it.
To access the connector for steering, you need to
remove all the bolts securing the inner panel,
allowing it to swing down.
CAUTION! The hinge side of the roof panel is
loose, and the panel can easily fall. Ensure the red
corner cable remains connected!
Once the panel is open, the connector(s) should be
exposed.
ENSURE YOU HAVE THE CORRECT CABLE
HARNESS TO MATCH THE CONNECTOR
STYLE AS SHOWN:
Old Style Connectors
New Style Connector

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 4 of 20
1b) Remove JD Mounting Bracket
Even though the CRG comes with a JD mounting
bracket, it is designed to fit into the Fendt sunroof and
has the same bolt pattern as the Fendt metal roof plate.
If your CRG came with the JD mount pre-installed at
the bottom, you will need to remove it.
Remove the JD mounting bracket from the CRG
bottom by removing four bolts, as shown.
The JD bracket is only needed when you use the CRG
as a receiver on a John Deere machine and mount. For
the Fendt installation it is not required.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 5 of 20
1b) Mount the CRG
Prior to mounting the CRG, determine if the unit
contains an internal cellular modem. If so, a SIM
card must be installed.
Use the same 4 bolt locations to fasten the CRG onto
the Fendt sunroof metal base.
For older model Fendt tractors, the CRG is mounted
forward (cable connectors toward the back of the
tractor).
For newer Fendt tractors, the CRG receiver is
mounted sideways facing right (cable connectors to
the left).
The roof plate will only allow you to install the CRG
in one particular direction due to the bolt pattern on
the CRG.
IMPORTANT!
The mount direction is configured within the CRG
ISO App in the JD display (refer to page 11).
Specifying the correct direction is crucial to proper
operation. The CRG is shown mounted in a right-
hand direction.
1c) Connect the CRG
Use the harness marked X4250 and connect the 2
DTM plugs (black and grey) to the CRG. Connect
the other end to the Fendt X4250 connector.
Optionally, the configurable serial NMEA output
from the CRG can be connected to the internal
NMEA serial lines of your Fendt tractor. The 9-pin
serial connector in your cab will output various
NMEA formats based on the configuration in the
CRG ISO App (ISObus VT). Refer to the connector
image on page 7.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 6 of 20
The CRG contains an RTK receiver which, like any
RTK receiver, requires RTCM correction data. To
achieve this, you may use an Internet-based NTRIP
server.
To get RTCM correction data into the CRG, there are
3 options available:
•Internal cellular modem (Refer to page 12 for
NTRIP caster setup).
•Bluetooth® using your mobile phone (Refer to
page 14 for Agra-GPS app setup).
•External correction source via radio modem
For an external radio, you may use the 4-pin DT
deutsch connector (shown unconnected). If the CRG
is supplied with an internal cellular modem, this
connector must remain unconnected.
ENSURE THE X4250 CONNECTOR IS
FULLY SEATED AS SHOWN.
(The side tabs will *click*.)
Close the overhead panel and plastic cover.
ENSURE THE FASTENERS ARE TIGHT.
Any loose movement of the CRG or overhead metal
panel will harmfully impact proper operation.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 7 of 20
Step 2: Mount the JD Display
The mounts for the JD display are NOT part of the
CRG kit, but can easily be manufactured in the
average shop or ordered from John Deere.
The JD display adapter cable will be plugged into the
9-pin ISO socket on the back right roof panel. Plug
the other end into the JD monitor as shown below.
Should another device in your tractor require NMEA
GPS information, this can be provided with the 9-pin
D-sub CRG serial output (shown unconnected to the
right of the cable). Configure the required signals in
the CRG ISO App.
The 4-pin ISObus access plug can be left un-
connected as shown.
The JD display may be mounted in many ways. You
may use the standard JD mounts or a RAM mount. A
display mount is not provided in the CRG kit and
must be purchased separately.
For example: RAM-270U + 2 * 1.5" balls (RAM-
202U) + 4" double socket arm (RAM-201U)
http://www.rammount.com/part/RAM-270U
Shown: JD 2600 in a Fendt 714

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 8 of 20
Step 3: Setup ISObus Apps
The CRG comes with 2 ISObus VT applications (ISO apps) that will be loaded onto the John Deere
monitor. The apps will automatically install themselves into the monitor after the first few minutes
of the initial start-up. On subsequent runs the apps will load themselves from monitor memory
much more quickly. The CRG apps include:
–Bridge/steering configurations
–Option to change work recording mode
–Option to change the machine type
–RTK configuration
–NMEA serial output configurations
Depending on the model of JD monitor, the
CRG ISO apps may be found in different
locations.
On a John Deere 4640 the application will be
loaded in the ISObus VT section on the main
page of the display.
On John Deere 1800, 2600, & 2630 the
application will be shown in the side menu of
the John Deere display. The side menu (shown
below) is opened by pressing the button on the
bottom right.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 9 of 20
NOTE: John Deere 1800 and 2600 monitors do not show a loading bar for ISO applications, while
2630 and 4640 monitors do.
If the ISO application does not load:
•Try clearing the monitor's memory. On 2630 monitors this can be done in the Message Center
in the side menu. Go to the Cleanup tab, check controllers, then Begin Cleanup. On 4640
monitors this can be done in the info page of the ISObus VT. Navigate to the ISObus VT
window and press the info (i) button at the top of the page, then press Clean Up ISObus VT.
•Do a hard reset of the John Deere monitor (Unplug it, then plug it back in).
•Do a full restart of the machine. Remember, the app may take a few minutes to load.
Switching Between ISO Apps
When accessing ISObus VT, the first page
viewed may be the CRG-Bridge app. Before
setting up the Bridge parameters, it is
necessary to setup the CRG-Receiver app. To
do this, pull up the app page using the button
circled.
Refer to page 15 for more information on
configuring the Bridge app.
In the image, the top item (light grey) switches
back to the CRG-Bridge app, and the bottom
item (yellow) switches to the CRG-Receiver
app.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 10 of 20
Step 4: Configure CRG-Receiver ISO App
The main screen of the CRG-
Receiver app is the “CRG Info”
page, as shown.
The minimum initial setup require-
ments include specifying the mount
placement & completing the
calibration procedure (refer to Mount
Settings on page 11).
Refer to the following sections for more information:
MINIMUM SETUP →
SETTINGS
Page 11 ……… General Settings
Page 11 ……… Mount Settings
Page 12 ……… NTRIP Settings
Page 12 ……… Modem Settings
Page 13 DIAGNOSTICS
Page 13 SERIAL PORT
UPDATES
Refer to the CRG Firmware
Update Manual
Use this button to switch between
the CRG app and the Bridge app

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 11 of 20
4a) General Settings
Minutes On After Power Off: Delay for CRG
to power down after machine is turned off.
This will allow GPS satellite tracking to
continue and allows for getting back to work
quickly.
Bridge: Must be enabled to provide auto-
steering. Must be disabled if using the CRG
as a receiver only.
Default Correction: Multiband allows the
CRG to use its preferred default correction
algorithms. SBAS restricts the receiver to
WAAS or EGNOS only.
Modem Type: If the CRG was purchased with an optional cellular modem, the make of the modem
is selected here. The “NTRIP Settings” and “Modem Settings” buttons are invisible if no modem
is selected.
Reset to Defaults: All parameters within the CRG Iso App are reset. The default settings take
effect after the CRG is rebooted.
Reset CRG: The CRG device is rebooted. WARNING: Resetting the CRG while it is engaged
will cause loss of machine control.
4b) Mount Settings
Height: the height from the ground to the
bottom of the CRG.
Fore/Aft: the horizontal distance from the
turning point (usually the rear axle) to the
CRG.
Mount Direction: the direction of the front of
the CRG. For example, when facing forward
in the driver’s seat, if the CRG connectors are
to the left, the Mount Direction should be
specified as Right.
Calibration: the tractor should be parked on a
spot that is as level as possible. After initial
readings are taken, you will be required to
turn the tractor around (180°) and park it on
exactly the same spot. Follow the on-screen
instructions.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 12 of 20
4c) NTRIP and Modem Settings
There are 3 options for connecting to an NTRIP caster of your choice:
•You may have purchased the CRG with an internal cellular modem. This modem requires
a SIM/data card to be installed.
•If you don’t have a cellular modem, you may use our Agra-GPS app on your phone to
connect to the CRG via Bluetooth® and get the RTCM correction data from an NTRIP
caster. In this case, the IP address and other details of the NTRIP caster are specified
within the phone app.
•You may connect an external radio modem. Consult with Agra-GPS for options.
If your CRG is equipped with an optional
cellular modem, setup within ISObus VT is
required. The NTRIP settings page allows
you to connect to RTCM correction data via
cellular connection.
The CRG also works without correction data;
however, accuracy is not nearly as good as
with an RTCM correction source.
Refer to the CRG Modem Guide for further
instructions.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 13 of 20
4d) Diagnostics
The diagnostics page is useful for determining
proper operation of the CRG.
For connecting with Bluetooth, please note
the name displayed near the bottom. This
name should appear on your phone on the
Bluetooth connections page.
Each CRG will have a unique Bluetooth name
(the last 4 characters will differ).
Refer to page 17 for notes on normal
indications and/or troubleshooting.
4e) Serial Port
The CRG can send NMEA data to the 9-pin
D-sub port on the ceiling panel (image on
page 7).
Serial format:
•8 data bits, no parity, 1 stop bit
•Baud Rate as specified on screen
Output Rate: 10 HZ means “10 sentences per
second”
Various NMEA sentence formats may be
selected for transmission.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 14 of 20
4f) Bluetooth App
The Agra-GPS app provides RTCM correction streaming via Bluetooth, through your mobile
phone. Be aware that you will require a reliable cellular network signal at your work site.
NOTE: Streaming data through your phone may incur extra data charges from your mobile
phone network provider, depending on your data limits. However, the data rate is fairly low: for
example, a typical 15kb/min streaming rate means that it will take almost 1200 hours to consume
1 GB of data.
1) Ensure the Bluetooth service on your mobile phone is enabled. Also, ensure it is not being
used by another app on your phone (for example, it may try to automatically connect with the
audio in your tractor cab or perhaps with a set of headphones).
2) Android: Go to the Google Play Store
iPhone: Go to the App Store
•Search for the Agra-GPS app, and install it.
3) Start the app, and using the upper left menu, go to the Settings page.
4) Under Settings → NTRIP, specify the parameters, for example:
•Host caster.emlid.com:2101
•Mount Point MP9999
•Login u12345
•NMEA Source Receiver
-The Host can also be specified with an IP address, e.g. 159.89.221.86:2101
-2101 refers to the “Port Number”, and must be separated from the address with a colon
-A list of Mount Points may also be obtained by typing the Host name (along with port
number) into a web browser like Google Chrome or Safari
-The Login user name must be obtained from your NTRIP service provider
-The NMEA Source may also be specified manually in terms of Lat/Long/Altitude
position. This must be the precise location of the stationary base station receiver.
5) Under Settings → Receiver, select the CRG device such as “AGRA-CRG-xxxx”, where xxxx
is a unique identifier for your CRG. The CRG must be powered on in order to be found by
your mobile phone. If you have multiple CRGs on different machines, you will need to reset
this parameter each time you move to a different machine.
6) User Profile: this is a way to store different NTRIP settings. If you move to work in a
different field, you may need to change to a different mount point or even a different caster.
By saving a different profile for different locations, it makes changing the setup easier.
7) Return to the Home screen and press Connect. RTCM data from the caster should start
streaming to the CRG, and under ideal conditions an RTK fix can be achieved in under 10
seconds. Your phone screen can be turned off and streaming will continue. For long work
days, it is recommended to keep your phone plugged into a charger so there is no interruption
due to phone battery drain.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 15 of 20
Step 5: Configure CRG-Bridge ISO App
Before adjusting auto-steer performance, the proper settings must be entered into the CRG-
Bridge ISO app.
The Bridge options home page is shown.
Press the button indicated by arrow to access
other information pages.
a) Ensure the Machine Type and Seat
Direction are appropriate for your
machine.
b) Record Mode refers to the recording of
the work area of the field completed by
the implement. Record Mode selects
between “Standard” and “On Resume”,
where “On Resume” can be triggered by
hydraulics (for example, it only records
work area when the implement in the
ground and not when raised).
c) While driving, if the direction of the machine is detected incorrectly, you can force it to change
it here.
d) You can see how the CRG detects the steering wheel angle from here
Other information pages include Help ,
Contact , and Firmware Update (refer
to the CRG Firmware Update Manual)
The button for accessing the Diagnostic page
is circled.
(b)
(c)
(d)

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 16 of 20
Auto-Steer Operation
Refer to the Pie indicator on the JD monitor screen. With the CRG’s
Bridge section enabled (via General Settings), you should see 1 quarter of
the Pie (Installed).
Press the AutoSteer-Enable button on the armrest to obtain 2 quarters
(Configured).
Press the Pie (on screen) to obtain 3 quarters (Enabled).
Press the Engage (also known as Resume) button to activate Auto-Steering
(4 quarters). You can press the Engage button again to disengage, or simply
turn the steering wheel.
Auto-Steer Optimization
Using the JD display you may adjust your steering performance. Most machines will perform
optimally with all JD settings centred. If a change is required, find an open area where you can
travel at target speed and adjust one parameter at a time until you are satisfied with the steering
performance.

AGRA-GPS Ltd. Installation Manual: CRG-Fendt
July 2022 Page 17 of 20
SF1 & RTK Indicators
In order to communicate with a John Deere monitor, the CRG identifies itself
as having an SF1 signal at all times, even when no satellite signals are
available. This doesn’t mean you are receiving an SF1 signal, and also doesn’t
mean you have an SF1 license.
When receiving a correction stream and in RTK Fix mode, the JD monitor will
show that RTK is enabled.
When in RTK Float mode, the JD monitor will show RTK-X.
When the CRG switches from RTK Float to RTK Fix mode, auto-steering will disengage. This is
normal and expected behaviour, and prevents a sudden unexpected path change. Press the Engage
(or Resume) button to re-engage.
Troubleshooting
-Normal values for RTK Data Received should be
between 10 to 20 kb/min, depending on the mount
point configuration. If RTK message indicators are
yellow, this means data has stopped flowing within
the past minute. Once 1 minute has elapsed
without a valid RTCM correction stream,
indicators will show red.
-RTK State will show yellow in Float mode.
-If an inappropriate mount point is chosen (for
example, from a receiver that is too far away), the
RTK State may not be able to obtain a Fix, but will
stay in Float mode. The accuracy in float mode is
not reliable, and in some cases, non-RTK positioning might even be better than float.
-If “Good RTK Messages” shows purple, this is because an information message was received
from the caster, which is usually an error message. This can happen if the caster believes you
are outside of the service area for the selected mount point.
-CNO refers to “Carrier to Noise” ratio, which is a measure of satellite signal strength.
Anything over 35 is normally acceptable for an RTK fix.