ARAG 863 Series Quick start guide

863-864-871-873 SERIES
ELECTRIC CONTROL UNIT
FOR CROP-SPRAYING APPLICATIONS
INSTALLATION, USE AND MAINTENANCE
02

• LEGEND OF SYMBOLS
=Generic danger
=Warning
This manual is an integral part of the equipment to which it refers and must accompany the equipment in case
of sale or change of ownership. Keep it for any future reference; ARAG reserves the right to modify product
specications and instructions at any moment and without notice.

3
CONTENTS
• Legend of symbols ..........................................................................................................2
1 Product description .........................................................................................................4
1.1 Intended use............................................................................................................4
2 Product functionality .......................................................................................................5
2.1 Components of electric control units........................................................................5
2.1.1 Electric control units with main control valve SERIES 871....................................5
2.1.2 Electric control units with main control valve SERIES 864....................................6
2.2 Components function...............................................................................................7
3 Installation........................................................................................................................8
3.1 Safety regulations ....................................................................................................8
3.2 Installing and connecting the unit ............................................................................8
3.3 Connecting up the system ..................................................................................... 10
3.4 Electrical connections............................................................................................ 11
3.5 Connection to control devices................................................................................ 12
4 Setting before use.......................................................................................................... 13
4.1 Electric unit adjustments before operation............................................................. 14
4.2 Adjustment of maximum operating pressure (only applicable for units
with proportional valve)..........................................................................................16
5 Use ..................................................................................................................................17
5.1 Calibration of operating pressure........................................................................... 17
5.1.1 Constant pressure units.......................................................................................18
5.1.2 Units with proportional valve ...............................................................................18
5.2 Calibrating the metered by-passes ........................................................................ 19
5.2.1 Metered by-pass calibration tables .....................................................................21
6 Maintenance / Diagnostics / Repairs............................................................................22
6.1 Flushing the liquid passages of the electric control units.......................................22
6.2 Cleaning the filters .................................................................................................23
6.2.1 Manual cleaning..................................................................................................23
6.2.2 Automatic cleaning of self-cleaning filters...........................................................24
6.3 Troubleshooting .....................................................................................................27
7 Technical data ................................................................................................................29
7.1 Correspondence between valve parts and maximum valve pressure....................29
8 End of life disposal........................................................................................................30
9 Guarantee terms.............................................................................................................30

4
1 PRODUCT DESCRIPTION
ARAG electric control units for crop-spraying applications consist of individual, modular-design
electric valves.
When installed on crop spraying machines, they ensure regular distribution of pesticides.
This booklet describes all the various parts that may be included in the unit.
Some of these parts may not be included in your unit. Likewise, given the modulari-
ty of the product, some types of parts may not be assembled together but are only
alternatives for others.
The illustrations in this booklet are, therefore, provided only as indications.
For detailed information, please refer to the description of the part in question and
not of the unit in general.
ARAG is not liable for any damage caused directly or indirectly by the type of uids
used for spraying by its control units.
The operator has full liability for the use of these products and therefore must verify
the safety regulations indicated on the package by the manufacturer of the liquid
and must wear suitable protective clothing (gloves, overall, footwear, helmet, etc.)
as required by law.
ARAG is therefore not liable for any damage or injury to persons, animals or things
as a result of the incorrect use of the products employed, without protection or con-
trary to recommendations.
1.1 Intended use
This device is designed to work on agricultural machinery for spraying and crop
spraying applications.
The machine is designed and built in compliance with EN ISO 14982 standard
(Electromagnetic compatibility - Forestry and farming machines), harmonized with
2004/108/EC Directive.

5
2 PRODUCT FUNCTIONALITY
2.1 Components of electric control units
2.1.1 Electric control units with main control valve SERIES 871
Fi g . 1
1Gearmotor of main control valve
2Maximum pressure valve
3Proportional electric valve
4Filter
5Boom section electric valves
6Metered by-passes
7Pressure gauge adapter or pressure sensor connection
IN Intake of liquid for spraying
OUT A Drain for maximum pressure valve
OUT B Drain for metered by-pass
OUT C Drain for proportional valve
OUT D Drain for self-cleaning lter
U1÷U5 Boom section delivery
LThe main control valve series 871 is an assembly made up of main control valve
gearmotor (1) and maximum pressure valve (2)

6
2.1.2 Electric control units with main control valve SERIES 864
Fi g . 2
1Gearmotor of main control valve
2Maximum pressure valve
3Proportional electric valve
4Filter
5Boom section electric valves
6Metered by-passes
7Pressure gauge adapter or pressure sensor connection
IN Intake of liquid for spraying
OUT A Drain for maximum pressure valve
OUT B Drain for calibrated backows
OUT C Drain for proportional valve
OUT D Drain for self-cleaning lter
U1÷U5 Boom section delivery
The main control valve series 864 is an assembly made up of main control valve
gearmotor (1) and maximum pressure valve (2).

7
2.2 Components function
1Gearmotor of main control valve
Opens or closes main valve to let uid ow through the system.
Gearmotor is operated via a suitable switch installed on the control device of the unit (e.g.: control
box or computer).
• Valve open = liquid sent directly to the circuit for application;
• Valve closed = liquid sent to the tank;
the suction system, if present, starts functioning.
2Maximum pressure valve
Eliminates the excess liquid when the set pressure level is reached.
Can be adjusted manually using the appropriate knob; the knob has a different colour according to
the maximum pressure for the valve (refer to par. 7.1 - Correspondence between valve parts and
maximum valve pressure).
3Proportional electric valve
Adjusted via a dedicated switch installed on unit control device (e.g.: control box or computer), this
valve regulates spraying pressure: when the vehicle progress speed changes during spraying, the
volume of the liquid distributed per surface unit (litres/ hectare) remains stable.
The increase or reduction in delivery is proportional to the number of revs of the engine with a
tolerance of +- 20%.
4Filter
Protects nozzles from dirt, which would eventually reduce their performance.
With self-cleaning lters, there is less need for frequent cleaning of the cartridge inside the lter.
5Boom section electric valves
These valves open/close the corresponding boom section; for valves with metered by-passes, the
valve closed position is the same as the drain position for the respective metered by-pass.
6Metered by-passes
These are adjusted so the level of spraying pressure remains steady when one or more sections
of the boom are closed.
7Pressure gauge adapter or pressure sensor connection (supplied on request)
Connection for pressure gauge or pressure sensor to provide working pressure indication when
main control valve is open.
Operation details will be described below.
For information on the adjustment of individual components, see Chap. 4 - Setting
before use - and Chap. 5 - Use.
For information on connectable control devices, see Par. 3.4 - Connection to control
devices.

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3 INSTALLATION
3.1 Safety regulations
• Do not install the control unit inside the driver’s cab.
• Install unit so that manual valves can be easily accessed, but well away from opera-
tor’s station.
• The intake ow rate for the unit must be less than maximum ow rate envisaged for
the main control valve.
• The parts and the hoses that are installed on the main pressure line (delivery line)
must be capable of withstanding greater levels of pressure than that of the maximum
pressure valve (refer to Par. 7.1 - Correspondence between valve parts and maximum
valve pressure).
• Commission the drainage system according to the maximum delivery ow rate for
the pump. Also install hose whose nominal operating pressure is greater than that
of the drain: any bottlenecks in the drainage system could cause abnormally high
pressure levels.
• Make sure the hoses used are suitable for the diameters of the chosen hose tails.
Use systems to secure the hoses that are suitable for the hoses in question.
• It is recommended to install a pressure-relief device (Series 459 on general ARAG
catalogue) on the pump to avoid risks caused by a unit malfunction.
This device does not replace a further safety valve, but it can limit unit damages in
case of sudden over-pressures.
Contact skilled personnel for any intervention requiring modications to the congu-
ration of the hydraulic connections.
ARAG is not liable for any damage to equipment or injury to persons, animals or
things caused by incorrect or unsuitable connection of the unit.
Likewise, ARAG is not liable for any damage caused directly or indirectly to
equipment or machinery, or injury to persons, animals or things caused by unsuita-
ble or unt hoses, cable grips, wraps or other accessory.
All forms of warranty are rendered null and void in case of damage to the unit caused
by the abovea.
3.2 Installing and connecting the unit
Install the control unit and secure it using the appropriate holes located on the brackets, as shown
in Fig. 3.
Fig. 3
xing holes

9
Respect the mounting direction of the unit, as shown in Fig. 4:
Fi g . 4
STANDARD MOUNTING POSITION

10
3.3 Connecting up the system
Connect the hoses in the system according to the layout shown below.
WARNING!
- Do not connect backow hoses in the lower part of the tank with the intention of
using them as hydraulic stirrers; only place them in the upper part so the liquid
drops down by gravity, as shown in Fig. 5.
- Make a separate connection of the backow of the valves with the tank.
Fi g . 5

11
3.4 Electrical connections
863 and 873 series valves can be connected to all control boxes of the new 4669 series as well as
to all control boxes of the previous 4663 and 4664 series and all ARAG computers.
3-wire operation > 4669 series control boxes:
- 12 Vdc power supply always on.
- Valve opens when opening/closing control is fed with
12 Vdc. Valve closes when control power is cut.
2-wire operation > 4663-4664 series control
boxes:
- Opening/closing movement obtained by reversing
power polarity with a double switch.
In both cases, the motor absorbs current only during the valve movement.

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3.5 Connection to control devices
• The diagram below is for illustrative purposes only; to ensure correct operation,
always refer to the installation manual relevant to the control device you are using.
• Connections and setting into operation are best left to qualied personnel.
ARAG disclaims all liabilities for damage to equipment, persons, animals or things
resulting from wrong or improper connection of the unit.
• Any damage to the unit resulting from the above will automatically invalidate any
warranty rights.
Electric units are designed for connection to ARAG control devices (computers, monitors, displays).
Each control device comes complete with the necessary connection cables and all cables are mar-
ked for ease of identication; please see Fig. 6 for a description of cable marks and their meanings.
Fi g . 6
• Use only the cables supplied with ARAG computers or control boxes.
• Do not pull on the cables. Be careful not to break, tear or shear the cables.
• Check wiring and cables for damage from time to time.
Minimum required cross-section area for cables connected to main control valve is
1.5 mm2; minimum required cross-section area for cables connected to remaining unit
components is 0.75 mm2.
• Any damage resulting from use of unsuitable cables or anyway other than ARAG
cables will automatically invalidate any warranty rights.
• ARAG disclaims all liabilities for damage to equipment, persons, animals or things
resulting from the above.
MPressure sensor
1÷5 Boom section valves
PProportional valve
GMain control valve

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4 SETTING BEFORE USE
• ONLY use clean water for any intervention or adjustment without any chemical
additives.
• Observe rated power supply voltage.
• Make sure to disconnect power to the device before arc welding; consider physical-
ly disconnecting the power supply cables.
• The hook-up diagram shown in Fig. 6 is for illustrative purposes only; standard unit
adjustment procedure may vary depending on which control device is used.
• All indications on installation, adjustment and operation reported below are inten-
ded for the unit installed in the standard mounting position (Fig. 4).
• For detailed information on the operation or adjustment of the valves included in
the unit, ALWAYS refer to the operating and maintenance instructions manual rele-
vant to your control device.
• All valves incorporate a protection that shuts down operation automatically in the
event of overvoltage; to reset the valves, remove power supply to the unit for about
20 seconds.
• Pressure readings are indicated by the pressure gauge or displayed at the control
device (where unit is equipped with a pressure sensor).

14
4.1 Electric unit adjustments before operation
1
Install pressure gauge or pressure
sensor to the seat in the pressure
gauge adapter.
Make sure the at gaskets
supplied with the control unit are
correctly positioned in the pressure
gauge adapter seat.
• nylon adapter = 1 gasket
• brass adapter = 2 gaskets
• Pressure gauge:
- tighten the pressure gauge into the relevant seat of pressure gauge holder ange until locking it,
without forcing it.
Use ARAG pressure gauges with 1/4" M coupling and a suitable end scale for the maximum operating
pressure.
• Pressure sensor:
- use ARAG sensors (Code 466112.X00); please read the instructions manual supplied with the
device for full installation information.
2
Set the relevant switch on the control
device to 'OFF' to set the main valve
so as to allow discharge.
3
Turn the knob anticlockwise to comple-
tely open the hand wheel of the
maximum pressure valve.

15
4
Fully open the proportional valve by setting down the relevant switch on
the control device.
5
Set the relevant switches on the control device to 'OFF' to close all
section valves.
6
Open all the compensation cocks by turning their knobs anticlockwise.
7
Turn the knob clockwise and completely close the drain to the
selfcleaning lter.

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4.2 Adjustment of maximum operating pressure (only applicable for units with proportional
valve)
Should either of the following be noted during operation:
• pressure above the maximum limit for the system and safety valve;
• abnormal leaks of liquid;
stop work, switch the pump off and check that the installation and preliminary procedures
have been completed correctly.
1Start pump operation.
2
Set the relevant switch on the control
device to 'ON' to open the main valve:
this will let uid in through the system.
3Gradually increase the number of revs of the pump until the maximum operating level is reached.
4
Push up the relevant switch on the control device to fully close the
proportional valve.
5
Close all the compensation cocks by turning their knobs clockwise.
6
Adjust the maximum pressure valve
by turning its knob clockwise until the
pressure of the valve is about 20%
above the unit’s maximum operating
pressure.

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5 USE
For detailed information on operation or adjustment of unit valves, ALWAYS refer to
the operating and maintenance instructions manual relevant to your control device.
Pressure readings are indicated by the pressure gauge or displayed at the control
device (where unit is equipped with a pressure sensor).
5.1 Calibration of operating pressure
1Select the type of nozzle and the relative operating pressure according to the litres/hectare (l/ha) to be
sprayed and the speed of progress.
2With the machine off, start the pump and take it to its operating level.
3
Set the relevant switch on the control
device to 'ON' to open the main valve.
4
Set the relevant switches on the control device to 'ON' to open all
section valves.
5Now take the unit pressure to the required level for spraying. There are two ways to perform this
adjustment:
CONTINUES

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5.1.1 Constant pressure units (Fig. 7a and 7b)
This kind of unit does not have a proportional valve, therefore the calibration of the operating pressure
is carried out by the maximum pressure valve.
The adjustment is made by turning the knob on the maximum pressure valve until operating pres-
sure is obtained:
• turn clockwise to increase pressure;
• turn anticlockwise to decrease pressure.
Fi g . 7a Fi g . 7b
5.1.2 Units with proportional valve (Fig. 8)
The calibration of the operating pressure is carried out by the proportional valve.
To adjust, operate the relevant switch on the control device until achieving the desired pressure.
Fi g . 8
In this case, the proportional valve must be used for pressure
adjustment and not the maximum pressure valve since the propor-
tional valve would not compensate the variations in speed correctly
should the operating pressure be too close to the calibration of the
maximum pressure valve.

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5.2 Calibrating the metered by-passes
These cocks safeguard the constant distribution of liquid even in case of operation with one or two
section valves closed.
Calibration must be carried out EACH TIME the type of nozzle is changed.
The metered by-pass calibration knobs are equipped with a graduated scale. Once each metered
by-pass has been calibrated, enter the value of the graduated scale for the type of nozzle in use in
the tables on page 20. This means that it will not be necessary to recalibrate a given metered by-
pass the next time the same nozzles are used, but simply set it to its value in the tables.
1
Close one section valve by setting its corresponding switch on the
control device to 'OFF'.
2
Adjust the corresponding compensation cock by turning the knob until
the pressure level is restored on the pressure gauge that was previously
set with all the section valves open.
3
Open and close the section valve (operate its switch on control device as
needed) and make sure that pressure value remains steady.
If pressure uctuates, repeat the operations described at step 2
until no more uctuation occurs.
CONTINUES

20
4Calibrate ALL section valves before running a treatment; the calibration can be done as follows, depen-
ding on the conguration of the control unit:
• the number of nozzles is EQUAL for all section valves
you need only to calibrate one single valve, then set the graduated scales of all the others to the same
mark.
• the number of nozzles is DIFFERENT for each section valve
each section valve must be calibrated independently.
• the number of nozzles for each section valve is MIRRORED (Fig. 9):
you need to calibrate only one part of the control unit (right or left boom, valves A, B, C): calibrate the
other part of the boom by setting the corresponding metered by-passes to match the valve settings on the
section of boom already calibrate (Fig. 9).
Fi g . 9
If the types of nozzle are not changed, the adjustments made will safeguard a uni-
form distribution of liquid even when spraying needs differing levels of operating
pressure.