JD 7520.book - Terre-net

AutoFarm GPS AutoSteer
Hardware Installation Guide
Supported Models:
John Deere 7220
John Deere 7320
John Deere 7420
John Deere 7520
PN: 602-0022-02
Special Requirements
Tools
This list consists of special tools that are needed. A complete set of common installation tools is assumed. If you
find that you are using other special tools, please notify Documentation@gpsfarm.com.
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Metric open wrenches
Metric socket wrenches up to 24mm
Soft brush
Clean rags
Oil collection pan (for collecting oil when hose connections are opened)
Attention
Tighten all screws, bolts, nuts, hose connections and cable connections after the final assembly of the AutoFarm
Steering System on the vehicle.
Technician Feedback
Please contact Novariant via email to Documentation@gpsfarm.com with:
• outdated pictures or instructions
• tips for other installers
• general comments or suggestions
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Table of Contents
Special Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Attention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Technician Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Kit Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation Kit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Install Roof Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Install the Base Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mount the Roof Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Install the Wheel Angle Sensor (WAS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Wheel Angle Sensor Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mount Linkage Arm and Sensor Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mount Linkage Arm and Sensor Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Adjust the Sensor and Linkage Arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mount the Sensor and Connect the Linkage Arms . . . . . . . . . . . . . . . . . . . . . . . . . 8
Install the User Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Assemble and Mount the User Terminal Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mount and Adjust the User Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Install the SA Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mount the SA Module Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mount the SA Module to the Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Assemble and Mount the Hydraulic Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Install the Hydraulic Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Install the Hydraulic Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Assemble the Hydraulic Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Route the Hydraulic Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
AutoFarm Steering Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
AutoSteer High Flow Valve Port Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Connect the Hydraulic Hoses to Power Beyond Ports . . . . . . . . . . . . . . . . . . . . . 20
Identify Power Beyond Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Power Beyond JD-6820 Europe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Attach the Pressure Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Install the Main Cable Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Attach the Main Cable Harness to the User Terminal . . . . . . . . . . . . . . . . . . . . . 25
Attach the Cable to the Power Supply in the Cab. . . . . . . . . . . . . . . . . . . . . . . . . 25
Attach the Main Cable Harness to the Roof Module . . . . . . . . . . . . . . . . . . . . . . 26
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Install the SA Module Cable Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Attach the Cable to the SA Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Connect the SA Module Harness to the Hydraulic Valve . . . . . . . . . . . . . . . . . . 30
Connect the SA Module Harness to the Wheel Angle Sensor . . . . . . . . . . . . . . . 31
Attach SA Module Cable Harness to Main Cable Harness . . . . . . . . . . . . . . . . . 31
Final Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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1. Installation Overview
1.1 Kit Overview
The John Deere 7520 Tractor Installation Kit contains the following components. (Component size is not
shown to scale below.)
1
1.2 Installation Kit Components
Item
Component
1
Hose Kit
2
Valve Bracket
3
Hydraulic Valve
4
User Terminal Monitor Bracket
5
Wheel Angle Sensor (WAS) Assembly
6
Roof Module Bolts/Spacers
7
Mounting Hardware
8
SA Module Assembly
9
SA Module Bracket
10
Main Harness
11
SAM Harness
12
Roof Module Bracket
13
Installation Guide
2
2. Install Roof Module
2.1 Safety Notes
The AutoFarm system must be powered OFF when installing or removing the roof module.
The supplied locking pin or a padlock must be in place whenever the vehicle is in operation.
The roof module must be removed when transporting the vehicle at speeds above 30 mph.
Make sure that you are in a stable position on the tractor platform when removing the roof module, so that
you do not fall or drop the roof module.
2.2 Install the Base Plate
Remove the cab roof bolts.
3
Align the base plate to mounting holes and fasten the base plate to the roof. The lettered holes and the
dummy cable connector must be on the left side of the tractor.
left side of
tractor
2.3 Mount the Roof Module
Slide the roof module into locked position. The cable connection must be on the left side of the tractor,
facing the rear.
4
Make sure that the spring lock is in place.
locked position
Insert and close the locking pin through the holes in the roof array and the base plate. Note that a padlock
can replace the locking pin.
locking pin
Attach the radio modem antenna. Note: The antenna should be attached “hand tight.” Do not use any tools
to tighten the antenna. Apply a small amount of silicone grease to the o-ring seal on the antenna before
mounting on the roof module.
5
3. Install the Wheel Angle Sensor (WAS)
3.1 Wheel Angle Sensor Overview
The Wheel Angle Sensor is shown in the diagram below.
linkage
arm
bracket
cable
connector
sensor
sensor
bracket
linkage arms
3.2 Mount Linkage Arm and Sensor Brackets
Mount the sensor bracket on the right side of the front axle as shown in the photo below. Use the existing
bolt on differential housing to secure the bracket.
sensor
bracket
sensor
linkage
bracket
linkage
arms
6
3.3 Mount Linkage Arm and Sensor Brackets
Mount the sensor bracket as shown below.
sensor
bracket
Mount the linkage arm bracket as shown below.
linkage arm
bracket)
7
3.4 Mount the Sensor and Connect the Linkage Arms
The complete wheel angle sensor installation is shown below.
sensor
bracket
sensor
linkage
bracket
linkage
arms
3.5 Adjust the Sensor and Linkage Arms
Adjust linkage arm length and/or linkage bracket position to obtain between 3200 and 3800 counts. Turn the
tractor all the way right and left to make sure the linkage arms can move without interference. Note: This
step is done after final assembly during the calibration and tuning steps.
8
4. Install the User Terminal
4.1 Assemble and Mount the User Terminal Bracket
Remove plastic hole covers from the cab post.
mounting
bracket
position
Mount the bracket assembly
9
4.2 Mount and Adjust the User Terminal
Attach the mounting plate on the adjustable arm to the user terminal using four screws.
mounting
plate
Remove the travel stop on the bracket assembly.
10
Slide the user terminal arm on to the bracket.
Replace the travel stop.
11
Tighten the arm on to the bracket using an Allen key wrench supplied in the installation kit.
Remove adjustment bolt caps.
12
Adjust user terminal arm tightness so the arms can be easily turned during normal tractor operation.
Replace adjustment bolt caps and adjust user terminal viewing angle. Turn the lever to loosen before
adjusting the angle.
13
Replace the plastic cover before final assembly. The complete User Terminal installation is shown in the
figure below.
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5. Install the SA Module
5.1 Mount the SA Module Bracket
Mount the SA module bracket in a protected position on the tractor.
SA module
bracket
5.2 Mount the SA Module to the Bracket
Mount the SA Module to the bracket.
SA module
15
AutoFarm recommends mounting the SA module in the positions shown below.
Do NOT mount the SA module in the positions shown in the figure below.
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6. Assemble and Mount the Hydraulic Valve
6.1 Install the Hydraulic Valve
The AutoFarm steering valve is mounted under the right side of the tractor cab in the position shown below
using the existing tractor bolts. Remove the cab mount bolts and use them to mount the valve bracket.
cab
bolts
hydraulic
valve
Mount the hydraulic valve on to the bracket using the three long bolts supplied.
hydraulic
valve
hydraulic
valve
bracket
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7. Install the Hydraulic Hoses
7.1 Assemble the Hydraulic Hoses
Assemble hoses as shown (Hose length is not shown to scale below.)
pressure port on
power beyond
pressure line
return port on
power beyond lines
return line
load sense
load sense port on
power beyond
adapters to
connect the
tractor steering
hoses to
AutoFarm valve
“steer out” right
line to right
steer cylinder
“steer out” left
line to left
steer cylinder
1/4 NPT elbow
for pressure
transducer
teflon tape
for NPT
threads
7.2 Route the Hydraulic Hoses
Summary: Steer IN and OUT hoses are routed from the hydraulic valve, under the cab, to the vehicle’s
steering lines.
Note: Secure the hoses with cable ties and be sure they are clear of moving parts and heat sources.
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7.3 AutoFarm Steering Valve
The valve is shown in the figure below.
steer out right
steer out left
steer in right
steer in left
return
load sense
pressure
7.4 AutoSteer High Flow Valve Port Connections
Hydraulic Hose
Valve Port Label
Steer In (Right)
SR
Steer In (Left)
SL
Steer Out (Right)
R
Steer Out (Left)
L
Pressure
P
Return
T
Load Sense
LS
Pressure Transducer
Trans
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7.5 Connect the Hydraulic Hoses to Power Beyond Ports
The pressure, return and load sense hoses from the AutoFarm valve must be connected to the three power
beyond ports located at the back of the tractor as shown below. The load sense port is usually a metric thread
on the side of the triangular adapter plate on either the right or left side of tractor as shown below. Some
tractors have Load Sense adapter plates on both sides. If both load sense adapter plates are installed on the
tractor and already being used, you will have to install a shuttle valve to connect the AutoFarm load sense
hose to one of the load sense ports already being used.
Pressure and
return ports for
power beyond.
Use metric thread
hose adapters.
The load sense port
is usually located on
this plate or on
similar plate on the
other side of the
tractor
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7.6 Identify Power Beyond Ports
Tractors equipped with a power beyond kit typically have the two quick couplers shown below. To install
the AutoFarm system on these tractors you can either replace the female quick couplers on tractor by the
two metric adapters provided in your hose kit or you can purchase two male quick couplers from a John
Deere dealer and install them on the ends of the AutoFarm pressure and return hoses. The AutoFarm load
sense hose can either be connected directly to the adapter plate on the valve block as shown on right or you
can install a male quick coupler on hose end if the tractor is already equipped with female quick coupler for
load sense. The load sense adapter plate can be installed on either the right side or the left side of the
tractor’s valve stack.
pressure and
return hoses
from
AutoFarm
valve
load sense
adapter plate for
power beyond
(this is a John
Deere part)
Optional male
quick couplers
on hose ends for
tactors having
female quick
couplers already
installed
metric thread
elbow adapter
for load sense
hose going to
AutoFarm valve
21
7.7 Power Beyond JD-6820 Europe
Some tractors have different port locations for the power beyond. The picture below is from a JD-6820 in
Europe. Your hose kit includes both M12 and M14 threaded elbows for the load sense because the thread
size can be different according to the tractor model and Power Beyond port location.
power beyond
block
pressure and
return ports
load sense port
22
7.8 Attach the Pressure Transducer
Attach the 90 degree fitting to the port marked “trans” on the AutoSteer valve. Note: Use teflon tape to
ensure a good seal.
Attach the pressure transducer to the 90 degree fitting. Note: Use teflon tape to ensure a good seal.
23
Attach the cable connector from the valve harness to the pressure transducer.
pressure
transducer
cable connector
make sure to line up the
connectors correctly. do not
force the connection.
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6. Install the Main Cable Harness
6.1 Attach the Main Cable Harness to the User Terminal
6.2 Attach the Cable to the Power Supply in the Cab
17
On European versions of the John Deere 7520 tractors you may find a different style of power outlet in the cab
as shown below. Purchase a power adapter to connect your AutoFarm to this type of outlet.
6.3 Attach the Main Cable Harness to the Roof Module
Route the cable out of the cab through an existing rubber plug under the left side of rear window.
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Attach the cable to the roof module as shown in the photo below.
Secure the cable to the roof using the eye clamp.
19
Route the cable down the left side of the cab and secure with cable ties.
cable tie
20
7. Install the SA Module Cable Harness
7.1 Attach the Cable to the SA Module
Connect the cable to the SA Module. (Different vehicle shown below.)
bottom of SA
module
cable
connector
locking
mechanism in
open position
Close the cable connector locking mechanism.
locked
position
21
Note: To disconnect the cable from the SA module, the connector must first be unlocked as shown.
pull upwards
pinch here
7.2 Connect the SA Module Harness to the Hydraulic Valve
Route and secure the steering cable from the SA Module to the hydraulic valve.
two connectors
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7.3 Connect the SA Module Harness to the Wheel Angle Sensor
Route and secure the WAS cable from the SA Module beneath the cab to the WAS. The two connectors on
the main must exit under that cab to connect to the SAM Module cable. Attach the cable to the WAS.
7.4 Attach SA Module Cable Harness to Main Cable Harness
Route the SA Module cable into the cab through the rubber plug under the right side of rear window.
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8. Final Checklist
Check all hose connections.
Check all cable connections.
Power up the vehicle and check for hydraulic leaks.
Check manual steering.
Power up the AutoSteer system and begin the calibration and tuning process.
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