Tatu Marchesan GCRO 7010 User manual

OPERATOR'S MANUAL
GCRO 7010
GCRO 7012

Dealer:
Owner:
Firm / Farm:
City: State:
No. of the Certificate of Guarantee:
Serial / No.:
Date: Invoice No.:
Product:
Notes:
IDENTIFICATION

1
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
Introduction
The GCRO 7010 and 7012 disk harrows were specially
designed for great areas. They are ideal for the initial preparation
or for leveling the soil, with excellent application and soil
preparation for annual or perennial crops.
Their reinforced and adequate structure are made of folded
steel plates joined by a good penetration weld and fine finishing,
with resistant parts on the load concentrations.
These disk harrows feature an efficient wheelset system
with hydraulic activation to control the depth and for a safe
transportation over long distances. This wheelset system also
streamlines the maneuvers during the job.
This instructions manual contains the necessary information
for the best performance of this disk harrow. The operator must
carefullyreadtheentiremanualbeforeworkingwiththeequipment.
Also, read and understand the safety recommendations.
For any further clarification or in the event of technical
problems that may arise during the service, consult your dealer
and the Technical Support department of the factory. They can
ensure the fully functioning of your TATU disk harrow.

2Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
Table of contents
1. To the owner 03
2. To the operator 04 to 09
3. Data sheet 10 to 14
4. Components 15 to 17
5. Assembly 18 to 58
Using the set of wrenches / Disc gangs assembly 18
Assembly of bearings and spacer spools 19 to 35
Disc gangs assembly sequence 36 to 39
Assembly of the disc gangs on the frame 40
Scrapers assembly 41
Disc gang carrier assembly to the frame 42
Wheelset assembly 43
Tires assembly / Stabilizer assembly 44
Hitch bar assembly 45
Hydraulic traction set assembly 46
Mechanical traction set assembly 47
Folding wings assembly 48 & 49
Lateral frames assembly 50
Hydraulic circuit 51 to 58
6. Set-up instructions 59 & 60
Preparing the tractor / Preparing the disk harrow / Hitching to the tractor 59
Important recommendations 60
7. Adjustments and operations 61 to 68
Cutting depth adjustment 61 & 62
Tractor position related to the previous pass - Lateral displacement 62
Ways to start the harrowing 63
Correct way of use 64
Direction of the maneuvers / Frames alignment 65
Troubleshooting guide 66 & 67
Operations - Important points 68
8. Optional 69 & 70
9. Maintenance 71 to 77
Lubrication 71
Lubrication points 72
Hydraulic cylinder maintenance 73 & 74
General maintenance / Hydraulic safety 75
Tires inflation 76
Lifting points 77
10. Important data 78 to 80
Calculation of hourly income 78
Average income table 79
Torque table 80
11. Important 81
12. Notes 82

3
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
To the owner
General information
Important
The acquisition of any TATU product assures to the original purchaser the following
rights:
• Warranty certificate;
• Operator's manual;
• Technical assistance by the dealer on equipment delivery.
However, the owner must check the condition of the equipment on delivery, as well
as knowing the warranty terms.
Special attention should be given to the safety recommendations, operation
precautions and maintenance of the equipment.
The instructions in this manual indicates how to get the best performance and allow
the operator to get maximum income, increasing the equipment lifetime.
This manual should be read by operators and maintenance staff.
• Only people who own a full knowledge of the tractor and equipment
must operate them;
• Marchesan is not responsible for any damage caused by accident
on transporting, maintenance, incorrect utilization or inadequate
storage, either by negligence and/or lack of experience from any
person;
• Marchesan is not responsible for any damage caused by unpredictable
situations or the incorrect use of the equipment.
The warranty shall not be applied to any equipment or any part thereof
which has been altered elsewhere than at the place of manufacture or
which the original purchaser thereof at retail has used or allowed to be
used parts, not made or supplied by Marchesan.
NOTE
Right and left hand side indication are made observing the equipment from the rear.
To order any parts or request technical assistance services, it is required to provide
the data contained on the nameplate, which is located on the equipment frame.

4Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
To the operator
Dear operator!
Respect the ecology. Do not throw trash away. This gesture
of goodwill helps to protect our environment.
Working safely
Be careful with the environment
This disk harrow is simple to operate, requiring however the
basic and essential cautions to its handling.
Always keep in mind that safety requires constant attention,
observation and prudence during the harrowing, transportation,
maintenance and storage.
Read and understand the information before making any
adjustment or maintenance.
Have extreme caution when operating with the power take-off
(PTO). Do not get closer during operation.
Products such as oil, fuel, filters, batteries and others are
spilled to the soil and can penetrate to the underground layers,
compromising nature. Ecological and conscious disposal of them
should be done.
• Security aspects must be carefully observed to avoid
accidents.
• This symbol is a warning to prevent accidents.
• The instructions under this symbol refers to the safety of the
operator, mechanician or third parties, therefore it should
be carefully read and observed. If the safety instructions
are not being followed, a serious accident or even death
may occur.

5
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
To the operator
Never use your bare hands to check hydraulic leaks, the high
pressure can cause several injuries.
Never attempt to change the adjustments, clean or lubricate the
equipment when the same is switched on or in movement.
Be careful while driving on slopes. Risk of overturn.
Prevent that chemical products (i.e.: fertilizers, treated seeds)
make any contact with your skin or clothes.
Keep access and work places clean and free from oil and grease.
Risk of accidents.
Never transport the equipment on highways or paved roads.
Avoid that the tractor wheels touch the drawbar in sharp turns.
The presence of any other people on the tractor or equipment
is stricly forbidden.
Have extreme caution when driving under electrical power lines.
Any contact may result in severe shocks, injuries or death.
For your protection and safety, always wear adequate clothes
and footwear while operating the equipment.
Always use the safety locks to carry out maintenance operations
and to transport the equipment.

6Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
To the operator
• Only trained and qualified personnel are allowed to operate the equipment.
• While working or during transportation, only the presence of the operator is
allowed on the tractor.
• Do not allow children to play near or over the equipment, while it is operating,
during transportation or storage.
• Have full knowledge of the soil before starting to work. Use the speed which is
suitable to the conditions of the ground or pathways to be covered. Provide the
delineation of obstacles or hazardous locations.
• Use personal protective equipment (PPE).
• Wear appropriate clothes and footwear. Avoid clothes that are either loose or
hanging from the body, which may become entangled in moving parts.
• Never operate the equipment without its protective devices.
• Be careful while hitching the tractor to the equipment.
• Wear appropriate gloves to work near the disc blades.
• When setting the equipment to transport position, check if there are people or
animals close or under the equipment.
• Never attempt to adjust, clean or lubricate the equipment while it is moving.
• In case of emergency, know how to stop the tractor and equipment quickly.
• Always shut down the engine, remove the key and use the handbrake before
leaving the tractor seat.
• Be sure that the tractor has enough power to pull the disk harrow.
• Carefully check the transport width on narrow locations.
• Do not drive the equipment under the influence of alcohol or any soothing/
stimulating medicine, as it may result in a serious accident.
• In case of a fire outbreak or any possible hazard, the operator must leave the
area as fast as possible and look for a safe place. Always have emergency
numbers at hands.
• Do not allow people or animals to get under the equipment at any time.
• Whenever you unhitch the equipment, either in the field or shed, do it on a flat
and firm surface and use the parking jacks. Make sure the equipment is properly
supported.
• We suggest that you carefully read the manual, as it will be a guide for periodic
verifications that need to be done and will allow that you assure the maintenance
of your equipment.
• If there is any doubt after reading it, ask your dealer. For more complicated
operations, there will be the right person to help you there.
• Please check the general safety instructions on the back cover of this manual.

7
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
Transportation over truck or trailer
To the operator
Marchesan does not advise the equipment traffic on highways, because this
practice involves serious security risks in addition to being prohibited by the
current existing traffic law. The transportation for long distances should be
done on truck, trailer or others by following these safety guidelines:
• Use adequate ramps to load or unload the equipment. Do not make the loading
on ditch banks, it can cause a serious accident.
• When lifting with a hoist, use the appropriate points to lift.
• Underpin the equipment appropriately.
• Fasten the moving parts that may get loose and cause accidents.
• Use chock blocks and safety chains to secure the equipment to the truck or
trailer during the transport.
• Make sure the SMV (Slow Moving Vehicle) sign, and all the lights and reflectors
that are required by the local highway and transport autorithies are in place,
are clean and can be seen clearly by all overtaking and oncoming traffic.
• After 8 to 10 km transporting, please inspect the load condition. Repeat this
procedure every 80 to 100 km. Give more attention when transporting the
equipment on rough roads, slopes and other adverse conditions.
• Always be careful with the load height, especially when passing under electrical
power lines, bridges and others.
• Check all laws and regulations regarding the height limits and load width while
transporting the equipment on truck or trailer. If necessary use banners, lights
and other devices in order to give adequate warning to the other drivers.

8Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
To the operator
The safety decals warn about the equipment points that require more attention and they
should be kept in good repair. If these decals become damaged or illegible, replace them.
Marchesan provide decals, upon request and indication of the respective serial numbers.
AATTEENNÇÇÃÃOO
AATTTTEENNTTIIOONN
AATTEENNCCIIÓÓNN
05.03.03.1428
Leia o manual antes de iniciar o
uso do equipamento.
Read the manual before attempting
to work with the equipment.
Lea el manual antes de iniciar el
uso del equipo.
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Para evitar acidentes, não faça regulagens com o
equipamento em movimento. Para manutenção
e limpeza, desligue o motor do trator.
In order to avoid accidents, do not carry out adjustments
with the equipment in movement. For maintenance and
cleaning, switch off the tractor engine.
Para evitar accidentes, no haga reglajes con el
equipo en movimiento. Para mantenimiento y limpieza,
apague el motor del tractor.
05.03.03.1739
Safety decals

9
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
To the operator
LUBRIFICAR E REAPERTAR DIARIAMENTE
LUBRICAR Y REAPRETAR DIARIAMENTE
L U B R I C AT E A N D T I G H T E N D A I LY
05.03.03.1827
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Para evitar acidentes, fique longe do equipamento quando o mesmo
estiver articulando ou desarticulando.
Falhas mecânicas ou hidráulicas podem fazer com que o equipamento
abaixe rapidamente.
In order to avoid accidents, keep away from the equipment
when the same is folding or unfolding.
Mechanical or hydraulic failure can make the equipment to
fall down quickly.
Para evitar accidentes, quede lejos del equipo cuando el mismo esté
articulando o desarticulando.
Fallas mecánicas o hidráulicas pueden hacer con que el equipo baje
rapidamente.
Para evitar acidentes, instale as travas dos cilindros antes
do transporte ou antes de efetuar serviços no equipamento.
In order to avoid accidents activate cylinder locks
before transportation or carrying out any service on
the equipment.
Para evitar accidentes, instale las trabas de los cilindros
antes del transporte o antes de efectuar trabajos en el
equipo.
05.03.03.1738
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Model Serial number Serial number
GCRO 7010 GCRO 7010 decal
05.03.03.3943 TATU logotype
05.03.03.3933
GCRO 7012 GCRO 7012 decal
05.03.03.3944

10 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
Data sheet
GCRO 7010
Model Number of
disc blades
Cutting width
(mm) Net weight (kg) Tractor required (cv)
GCRO 7010
Non folding
28 3,620 4,880 230 - 240
32 4,120 5,180 240 - 250
36 4,625 5,430 250 - 260
40 5,135 5,500 260 - 270
44 5,645 6,155 270 - 280
48 6,150 6,440 280 - 300
GCRO 7010
Folding wings
44 5,530 6,645 290 - 300
48 6,160 7,820 300 - 320
52 6,.730 8,180 320 - 340
56 7,240 8,405 340 - 360
60 7,772 9,420 360 - 380
GCRO 7010
Lateral frames
72 9,540 14,120 420 - 450
76 10,065 14,325 450 - 480
80 10,445 14,755 480 - 510
• The weights above were obtained using Ø 28" x 7.5 mm disc blades.
NOTE
Model: ......................................................................................................... GCRO 7010
Spacing between disc blades:.............................................................................270 mm
Disc blades dimension: .............................................................................. Ø 26" x 6 mm
........................................................................... Ø 26" x 7.5 mm
........................................................................... Ø 28" x 7.5 mm
........................................................................... Ø 30" x 7.5 mm
Disc blade type:...................................................Concave notched and/or concave plain
Bearings - Length: ..............................................................................................262 mm
- Type: .....................................................................................Oil bath bearing
Spacer spools - Length: ......................................................................................263 mm
- Type: ........................................................................................ Iron cast
Axle diameter: .................. Ø 41.3 mm (1.5/8"), Ø 44.45 mm (1.3/4") or Ø 54 mm (2.1/8")
Hitching type: .................................................................................................... Drawbar
Tires: ......................................................................................Check 'tires inflation' page
Working speed:................................................................................................5 - 7 km/h

11
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
Data sheet
GCRO 7012
Model Number of
disc blades
Cutting width
(mm)
Net weight
(Kg)
Tractor
required (cv)
GCRO 7012
Non folding
28 3,985 5,800 250 - 270
32 4,555 6,705 270 - 290
36 5,115 6,905 290 - 310
40 5,665 7,560 310 - 330
44 6,225 8,100 330 - 350
48 6,785 8,450 350 - 370
GCRO 7012
Folding wings
50 7,080 9,430 420 - 450
52 7,380 9,695 450 - 480
56 7,940 10,020 480 - 510
NOTE • The weights above were obtained using Ø 32" x 9 mm disc blades.
Model: ......................................................................................................... GCRO 7012
Spacing between disc blades (mm):...........................................................................300
Disc blades dimension: ........................................................................... Ø 30" x 7.5 mm
........................................................................... Ø 32" x 7.5 mm
.............................................................................. Ø 32" x 9 mm
Disc blade type:...................................................Concave notched and/or concave plain
Bearings - Length: ..............................................................................................292 mm
- Type: .....................................................................................Oil bath bearing
Spacer spools - Length: ......................................................................................292 mm
- Type: ........................................................................................ Iron cast
Axle diameter: ....................................................Ø 41.3 mm (1.5/8") or Ø 54 mm (2.1/8")
Hitching type: .................................................................................................... Drawbar
Tires: ......................................................................................Check 'tires inflation' page
Working speed:................................................................................................5 - 7 km/h

12 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
Data sheet
General dimensions
AA
BB
DD
CC

13
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
Data sheet
NOTE • * For these models, there are two versions that feature the measures below:
• Disk harrow with 52 disc blades - Height (F): 3435 or 3640;
• Disk harrow with 56 disc blades - Width (H): 4400 or 4855.
General dimensions
GG
FF
HH
EE

14 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
Model Number of
disc blades
Dimensions
A B C D E F G H
GCRO
7010
28 8630 4870 2020 430 ---- ---- 2790 ----
32 8630 4870 2020 430 ---- ---- 2790 ----
36 8630 5060 2020 430 ---- ---- 2790 ----
40 8670 5390 2020 430 ---- ---- 2790 ----
44 8670 5955 2020 430 ---- ---- 3050 ----
44D 9345 5820 2020 430 8760 3440 2470 3550
48 8690 6480 2020 430 ---- ---- 3050 ----
48D 9390 6520 2020 430 9310 3510 3050 3465
52 9480 7025 2020 430 9325 3660 3050 4340
56 9555 7535 2020 430 9290 3830 3050 4325
60 9640 8120 2020 430 9325 3750 3050 4675
72 10720 9650 2115 465 10775 4505 3550 6245
76 10840 10175 2115 465 10860 4790 3550 6310
80 11025 10860 2230 500 11025 5030 3550 6385
NOTE • The "B" measure corresponds to the TOTAL WIDTH of the disk harrow (being the disc
blades lowered for the folding wings type).
• The measures are approximated values.
• Disk harrow 28, 32, 36, 40, 44 and 48 - Non folding wings.
• Disk harrow 44D, 48D, 50, 52, 56 and 60 - Folding wings.
• Disk harrow 72, 76 and 80 - Lateral frames.
Data sheet
General dimensions
Model Number of
disc blades
Dimensions
A B C D* E F G H
GCRO
7012
28 8635 4870 2000 330 ---- ---- 3050 ----
32 8630 5025 2050 375 ---- ---- 3050 ----
36 9305 5600 2050 375 ---- ---- 3050 ----
40 9300 6155 2050 375 ---- ---- 3050 ----
44 9410 6705 2050 375 ---- ---- 3050 ----
48 9500 7270 2050 375 ---- ---- 3050 ----
50 9580 7600 2050 375 9315 3565 3050 4865
52 9615 7865 2050 375 9305 3570 3050 5390
56 9725 8435 2050 375 9305 3750 3050 5125

15
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
Components
01 - Frame 10 - Transport lock
02 - Front disc gang 11 - Cylinder stops
03 - Rear disc gang 12 - Rear hitch (Optional)
04 - Wheelset system 13 - Parking jack
05 - Hose support 14 - Hydraulic system
06 - Drawbar 15 - Wrenches
07 - Tractor hitch 16 - Safety chain
08 - Leveling system - Hydraulic (Optional)
09 - Leveling system - Mechanical
GCRO 7010 / 7012 - Non folding wings
0404
0808
1414
0505
1212
0303
0202
0707
1616 1313
0606
1111
1010
0101
1515
0909

16 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
Components
GCRO 7010 / 7012 - Folding wings
01 - Frame 10 - Transport lock
02 - Front disc gang 11 - Cylinder stops
03 - Rear disc gang 12 - Rear hitch (Optional)
04 - Wheelset system 13 - Parking jack
05 - Hose support 14 - Hydraulic system
06 - Drawbar 15 - Wrenches
07 - Tractor hitch 16 - Safety chain
08 - Leveling system - Mechanical
09 - Leveling system - Hydraulic (Optional)
0101
0404
0505
1010
0303
1212
1111
0202
0707 1313
1414
1515
1616
06060808
0909

17
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
Components
GCRO 7010 - Folding frame
01 - Central frame 09 - Transport lock
02 - Right lateral frame 10 - Wheelset system
03 - Left lateral frame 11 - Hose support
04 - Front disc gang 12 - Cylinder stops
05 - Rear disc gang 13 - Parking jack
06 - Drawbar 14 - Hydraulic system
07 - Tractor hitch 15 - Wrenches
08 - Leveling system - Hydraulic
0101
0404
1515
0101
0606
1111
1313
1414
0707
1010
0909
0505
1212
0202
0303
0808

18 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
Assembly
First of all, put the parts in a clean place to identify them easier. Check the parts using
the list that comes inside the packing box.
Using the set of wrenches
NOTE • We recommend wearing gloves, especially while assembling the disc gangs.
• The wrenches (A1) are used on 2.1/8" axles.
Disc gangs assembly
Before starting to assemble the disc gangs, check the correct position of the bearings
and spacer spools.
• Use two box-end wrenches (A and A1) to tighten the nuts of the disc gangs, one to
hold the axle nut on one side while the other tight the nut to the other end, thereby preventing
the axle from rotating.
• Use the box-end wrench (B) to tighten the nuts from the traction set.
• Use the open-end wrench (C) to adjust the nut on the rear stabilizer.
• Use the L-type socket wrench (D) to tighten the nuts on the disc gangs.
• Use the L-type socket wrench (E) to tighten the nuts on the bearing bolts.
EE
DD
BB
A1A1
CC
AA