Ovlac Eurodisc Technical reference manual

EURODISC REV JUL-2021
INSTRUCTIONS AND SPARE PARTS MANUAL

CONGRATULATIONS!
You have just acquired an Ovlac Eurodisc!
As Spain's largest producer of agricultural machinery for soil tillage, we feel honoured
that you have chosen Ovlac as your trusted choice.
After many years of experience in the field, we make sure that you will be proud of your
purchase in the same way that we are proud of the product we have created under the
strictest quality standards.
For the correct use and enjoyment of this equipment, we strongly recommend that the
customer read the instructions contained in this manual and use it as a reference for
any questions that may arise regarding the operation of your Ovlac equipment.
Sincerely yours: Jorge Calvo
CEO of Ovlac
1

CONSIDERATIONS
This instruction manual describes the Operating and Maintenance
Instructions and Spare Parts for the indicated equipment.
This agricultural equipment, called EURODISC, is designed for tilling
the soil, applied to a Tractor with lifting gear and universal
threepoint linkage.
The proper functioning of the machine depends on its correct use. It
is therefore advisable to read the instructions given in this manual
carefully in order to avoid any inconvenience that could impair the
proper functioning and durability of the machine.
It is also important to follow the instructions in the manual, as the
Manufacturer declines all responsibility for negligence and
non-observance of these instructions.
The Manufacturer is at your disposal to guarantee immediate and
accurate technical assistance and to provide all that may be
necessary for a better functioning and performance of the machine.
The Manufacturer reserves the right to modify the Machine without
the need to urgently update this publication.
INDEX
1.- Security Rules
2.- Description and technical data
3.- NON STOP Security Systems
4.- Turn up
4.1.- Adaptation to the tractor
4.2.- Alignement
4.3.- Other adjustments
5.- Working depth
6.- Transport and parking
7.- Maintenance
8.- Optional equipment
9.- Spare parts
2
6.1.- Hydraulic functions

1.- Security Rules
Read carefully all the instructions for use of the cultivator.
The manufacturer declines all responsibility for any inconvenience caused by NOT observing
the Safety and Accident Prevention Regulations described below.
1.- Pay attention to the danger and warning symbols shown in this manual and indicated on the
equipment.
2.- Repairs and adjustments to the equipment must always be carried out with the engine
stopped and the tractor locked.
3.- It is strictly forbidden to transport people or animals on the equipment.
4.- It is strictly forbidden to entrust the driving of the tractor, with the equipment hooked up, to
people without a driving license, inexperienced, or who are not in good condition.
5.- Scrupulously observe all the accident prevention measures recommended and described in
this manual.
6.- The application of additional equipment to the tractor implies a different weight distribution
on the tractor axles.
7.- Before putting the tractor and the equipment into operation, check that all the safety
elements for transport and use are in perfect condition.
8.- The symbols with warnings displayed on the equipment give the appropriate suggestions for
the use of the same.
9.- To circulate on the road, it is necessary to observe the rules of circulation according to the
country where it’s operated.
10.- Respect the maximum weight foreseen on the tractor, the total mobile weight, the transport
regulations and the road code.
11.- Before starting to work, familiarise yourself with the control devices.
12.- Pay the utmost attention to hitching and unhitching the equipment.
13.- Never leave the driving position when the tractor is in motion.
14.- Remember that road adherence, steering and braking capacity may vary significantly due to
the presence of suspended equipment.
15.- It is strictly forbidden to remain in the area of action of the equipment.
16.- Before leaving the tractor, lower the suspended equipment, stop the engine, apply the
parking brake, and remove the ignition key from the dashboard.
17.- The category of the hitch pins of the equipment must correspond to that of the linkage of
the lift.
18.- Pay maximum attention when working in the area of the arms of the tractor, it is a very
dangerous area.
19.- It is strictly forbidden to stand between the tractor and the equipment to manoeuvre the
external lifting control.
20.- During road transport with the equipment suspended, put the control lever of the hydraulic
lift in the locking position.
21.- The spare parts must correspond to the requirements defined by the Manufacturer. Always
use original spare parts.
22.- The safety instruction decals must always be clearly visible. Clean and replace them if they
are not legible (You can ask your dealer for them).
23.- The instruction manual must be kept for the whole life of the equipment.
3

WARNING
Before starting to work, read the instructions in the
manual.
DANGER
Do not handle the equipment when it is suspended, danger
of crushing. Maintain the safety distance.
DANGER
Lifting the equipment can cause injuries due to reaching.
Maintain the safety distance.
To be ready in case of an emergency
Keep a first aid kit and fire extinguisher on hand. Write
down the telephone numbers of doctors, ambulance and
fire brigade and keep them near the phone.
Use adequate clothes
Avoid loose clothing and use appropriate safety equipment
depending on the type of work. Safe operation of the
machine requires the full attention of the operator.
Don’t use headphones for listening to the radio while
working with the machine.
4

SPECIFIC INSTRUCTIONS FOR
WELDING REPAIRS
When repair by welding is authorised by the manufacturer, the
following points shall be taken into account generally.
In particular cases, appropriate welding instructions shall be
provided for each application.
1 Repair welding should be carried out by qualified welders and
in accordance with good technical and safety code practice.
2 Before welding repairs, remove paint, rust, dirt or any other
substances harmful to the weld.
3 To avoid damage to mechanical or hydraulic components such
as bearings, shafts, hydraulic actuators, hydraulic systems, etc.,
care should be taken to place the earth connection in an area of
good contact, free of paint and rust.
On machines with hydraulic cylinders, we must ensure that the
welding current does not flow through such elements. For this
purpose, the earth connection shall be placed on the same part
of the machine to be repaired.
4 Our machines are made of high elastic limit (HEL) steels, which
means that special attention must be paid to welding processes
and filler materials. In general, basic coated electrodes E7016 or
E7018 will be used. For the MAG (semi-automatic) welding
process, ER70S6 wire and Ar+20C02 will be used as shielding gas.
In both cases, follow the recommendations for drying times and
temperatures recommended by the manufacturers of the filler
material.
5 When the parts to be welded are thicker than 15 mm, or the
ambient temperature is lower than 15 C, preheating by flame
between 75-100 C is recommended.
6 It is strictly forbidden to cool welding seams with water, air or
any other substance.
In case of questions during repair, please contact the
manufacturer via the usual means of communication.
5

2.- Description and Technical Data
1. HEADSTOCK
2. IDENTIFICATION PLATE*
3. CENTRAL FRAME
4. LATERAL FRAME
5. HYDRAULIC FOLDING SYSTEM
6. SECURITY SYSTEMS
7. BODY
8. DISC
9. ROLLERS
Note: the number of the plough’s manufacture, engraved on the
nameplate, must match the number engraved on the
headstock’s support.
*2. IDENTIFICATION PLATE
6
1
2
5
3
7
6
9
4
8

Technical Data
7
*Weight with bars rollers.
DISCS WORKING
WIDTH (m)
TRANSPORT
WIDTH (m)
POWER
(HP)
WEIGHT
(Kg) (*)
EURODISC 250
EURODISC 300
EURODISC 350
EURODISC 350P
EURODISC 400P
EURODISC 500P
EURODISC 550P
18
22
26
26
28
36
38
2,50
3,00
3,60
3,60
4,00
5,00
5,50
2,50
3,05
3,62
3,00
3,00
3,00
3,00
80-100
100-130
120-150
120-150
140-170
160-200
180-250
1.830
2.220
2.590
2.790
3.120
3.910
4.300
EURODISC

-
3.- Non-Stop Security Systems
“Non-Stop” Leafspring security system acts automatically. When the share meets an obstacle, the
systems gives up, elevating and saving the arm, getting back to its original position without stopping
the tractor.
This way, every impact caued by uneven terrain will be absorbed by the security system, which
protects the elements of the machine, and therefore, also the tractor.
For the same reason, Non-Stop security systems decreases the traction effort by avoiding the
tractor HAVING TO OVERCOME every obstacle and having an uniform labor.
In the machines equipped with leafspring securiry system . the string of the bow that determinate
the leafspring, must have a length of +- 500mm, measure as appears on Fig 2.
Note: OVLAC Non-Stop security system are factory-regulated witn an optimum pressure for
midhardness terrains.
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500+-2 mm
Fig. 2

4.- Turn up
4.1 - Adaptation to the tractor
OVLAC ploughs are designed to adapt to the 3 universal points of every tractor.
Before linking the plough must check that:
-Tractor arms are regulated to the same length and height.
-Tractor wheels have the same pressure, and check that it fits with the manufacturer
rules.
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4.2 - Alignment
The Short Disc Harrow must work alligned with the
tractor, or this will tend to abandon the tractor's
straight. Must check that the A1= A2 (Fig. 3).
The third point arm must be coupled in a way that
the end that links over the disc harrow remains
slightly higher than the end that links to the tractor
(Fig. 4).
To the tractor in a
descending way
Fig. 3 Fig. 4
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4.3 - Other adjustments
The length of the 3rd point must be adjusted in a way that the
frame adopts a parallel position to the ground, if not, the rows of
arms will work at uneven depths, causing a wrong labor. (Fig. 6)
For the same reason, is necessary for the tractor arms to be found
at the same height, so the machine works at the same depth in its
whole width (Fig. 7) and side triggers doesn't happen, so the tractor
doesn't find it hard to keep its path. (Fig. 7)
IMPORTANT: Must try not totake curves while working, specially
with very heavy machinery, since the pulling effort may cause
severe damage to the machine's structure.
Fig. 5
Fig. 6
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5.- Working depth
The working depth is regulated by the standard roller, through the regulation bolts A (Fig.7).
Nevertheless, the Eurodisc can be equipped with limiting wheels, whose height is regulated through the bolts B (Fig. 8)
Fig. 8
Fig. 7
A
B
12

6.- Transport
Fig. 9
13
Fig. 10
C
At the machines with hydraulic folding, this will be retracted in order to
ease its transport, leaving the machine at its minimum width. See Fig.9. In
order to avoid the oscillation of the rollers, fix the lower bolts A described
in the previous point.
At the trailed models the machine must elevate the most on its transport
wheels by the cylinder C (Fig 10) up to its maximum extension for a safe
transport. The cylinder C have on the inside a shock absorpter for a more
comfortable driving.
6.1- Hydraulic Functions
There's 2 hydraulic functions available:
1. Red: Elevate/Lower the trail kit, in order to regulate the
height of the machine.
2. Yellow: Fold/unfold the machine for Work (folding
cylinders stretched) –Transport (retracted cylinders)

7.- Maintenance
Must check how tighten the bolts are after the first 2 hours of labor, specially the
ones on the bodies and shares. Afterwards, check every 100 hours of labor. When
finishing the campaign, wash the plough and grease the bodies to avoid rust.
Lube: Greasing points must be greased up regularly.
Safe maintenance
Get familiar with the maintenance proccedures before doing any labor.The working
area must be clean and dry. Not doing any greasing labor, repair or adjustment
while the engine is running. Keep the hands, feets, and clothes always far from the
moving components. Place all the hydraulic controls on neutral-gear in order to
relieve pressure. Lower all gear to the ground. All the components must be in good
shape and correctly installed. Repair damage immediately. Change any wasted or
broken piece. Keep all the components of the machine clean off of grease, oil and
accumulated dirt. By dealing with trailed equipment, disconnecting the group of
cables from the tractor before doing any wielding on the machine.
Watch out for the high pressure leaks
Leaking fluids from the system might leak strong enough to tear flesh, causing
severe injuries. Therefore, is indispensable to leave the system pressure-less
before loosing or disconnecting any pipe and assure that all the connections and
connectors are well-tighten before applying pressure to the system.
In order to locate an hydraulic oil leak use a piece of cardboard placed in
between the connections. Don't get near high-pressure leakings.
Even if after all this measures an accident happens, go immediately to see a
doctor, who should remove the fluid surgically in a few hours in order to avoid
gangrene. Unexperienced doctors with injuries of such nature may go to a
specialized medical center.
Maintenance of hydraulic cylinders. IMPORTANT: keep the plugs clean. Abrasive
particles, such as sand, metal sharps, may damage the cylinders, causing inner
leaks. Once unplugged off the tractor, place the protection bolts and make
sure they're not touching the ground.
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LINKING BOLTS
The linking bolts A and the turning bolt
B must be made of: F-125 TREATED of
36 and 40 diameter each.
For the proper adjustment and
functioning the bolts will be replaced
when the clearance between the bolt
and the holder overpass 2 mm.
A
B

8.- Optional equipment
Ovlac' Eurodisc can be equipped with:
1. Sideplates. (Fig.11)
2. Limiting left disc. (Fig.12)
3. Side wheels. (Fig.13)
4. Rollers. (Fig.14, 15, 16, 17, 18)
Fig. 11 Fig. 13
Fig. 14
15
Fig. 12

Fig. 15 Fig. 16
Fig. 17 Fig. 18
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9.- Spare parts
Spare parts orders must always be placed through dealers and will include the next indications:
- Type, model and plough's number of manufacturing. This data is indicated on the identification plate of the plough.
- Reference of the piece. Indicated on the spareparts catalogue.
- Name of the piece and quantity required.
- Method of shipping. Transport expenses run of the purchaser.
- NOTE: The terms left or right, indicated on the name, are meant to be understood always facing the plough from its rear view. When it comes
to supposed-to-break gear, rights are considered ll those that are part of the body that drifts to the rigth and viceversa.
- Note on warranty: must be clearly specified if the spare parts order are ordered under warranty time. The manufacturer will be the one to
decide if the order stands to warranty or not when replacing the pieces. Plus, warranty loses all its value if:
• Repairs Unauthorized by the manufacturer are made, unoriginal spare parts and bolts are inadequate.
• User goes through the power limit stated on the technical data sheet, or abnormal maneuvers are made.
17

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Index
BEAM / FRAME.......................................................................................................19
BEAM / FRAME FOLDABLE ...................................................................................21
HYDRAULIC SYSTEM EURODISC..........................................................................23
BODY........................................................................................................................27
ROLLER ARM.......................................................................................................... 29
ROLLER....................................................................................................................31
DOUBLE ROLLER.................................................................................................... 35
V ROLLER.................................................................................................................37
RUBBER ROLLER................................................................................................... 39
LEAF-SPRINGS ROLLER.........................................................................................41
“T RING” ROLLER................................................................................................... 43
REAR DEFLECTORS ................................................................................................47
SIDE DISC................................................................................................................51
LATERAL WHEELS................................................................................................. 53
FIX EURODISC TRAFFIC LIGHT KIT ..................................................................... 55
FOLDABLE EURODISC TRAFFIC LIGHT KIT..........................................................57
FRONT TRAILING KIT............................................................................................ 59
FOLDING AUTOMATIC LOCKER ............................................................................61
REAR TRAILING KIT .............................................................................................. 63
HYDRAULIC SYSTEM TRAILING KIT.................................................................... 65
FRONT WHEEL EURODISC (>21)...........................................................................67
FRONT WHEEL EURODISC (<21).......................................................................... 69
FRONT SIGNALING KIT .......................................................................................... 71
REAR SIGNALING KIT.............................................................................................73

19
BEAM / FRAME