Tatu Marchesan GCRO 7010 User manual

OPERATOR’S
MANUAL
GCRO 7010GCRO 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 wheel system
with hydraulic activation to control the depth and for a safe
transportation over long distances. This system also streamlines
the maneuvers during the job.
This operator's 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 explanation or in the case 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 11
3. Data sheet 12 to 16
4. Components 17 to 19
5. Assembly 20 to 60
Using the set of wrenches 20
Assembly of bearings and spacer spools 21 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 / Lantern support assembly 42
Wheel arm 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
Side frames assembly 50
Hydraulic circuit 51 to 60
6. Set-up instructions 61 to 64
Preparing the tractor / Preparing the equipment / Hitching to the tractor 61 to 63
Important recommendations 64
7. Adjustments and operations 65 to 73
Cutting depth adjustment 65 & 66
Tractor position related to the previous pass - lateral displacement 66
Ways to start the harrowing 67
Correct way of use 68
Direction of the maneuvers / Frames alignment 69
Troubleshooting guide 70 & 71
Operations - Important points 72 & 73
8. Optional 74 & 75
9. Maintenance 76 to 82
Lubrication 76
Lubrication points 77
Hydraulic cylinder maintenance / assembly 78 & 79
Hydraulic safety 80
Disk harrow maintenance 81
Tires inflation 82
10. Important data 83 to 85
Hourly income calculation 83
Average income table 84
Torque table 85
11. Important 86

3
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
General information
Important
To the owner
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
transport, operate and carry out any maintenance on them;
• Marchesan is not responsible for any damage caused by accident
on transporting, 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
Working safely
Be careful with the environment
Dear operator!
Respect the ecology. Do not throw trash away. This gesture of
goodwill helps to protect our environment.
Products such as oil, fuel, filters, batteries and others are
spilt over the soil and can penetrate to the underground layers,
compromising nature. Ecological and conscious disposal of them
should be done.
This equipment 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 work, transportation, maintenance
and storage.
• Security aspects must be carefully observed, to avoid
accidents.
• This symbol is a warning used to prevent accidents.
• The instructions under this symbol refers to the safety of the
operator, mechanician or third parties, therefore they should
be carefully read and observed. If the safety instructions are
not being followed, a serious accident or even death may
occur.
Read and understand the information before making any
adjustment or maintenance.
Have extreme caution when operating with the power take-off
(PTO), which you should not get closer during operation.
When hitching the equipment to the tractor, use a chain to lock
the equipment drawbar to the tractor hitch bar. This procedure will
prevent a possible rupture of any hydraulic hose or breaks on the
hitching system, what would make the equipment tilt up.

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 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 or free from oil and grease.
Risk of accidents.
Never transport the equipment on highways or paved roads
during the night. 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 any maintenance or 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 or to get over the equipment, while it is operating,
during transportation or storage.
• When setting the equipment to transport position, check if there are no people
or animals close or under it.
• 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.
• Wear protective gloves to work near the cutting parts.
• Never operate the equipment without its protective devices.
• 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.
• Carefully check the transport width on narrow locations.
• Be careful while hitching the equipment to the tractor.
• Only pull the equipment using a tractor with appropriate power.
• 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.
• In case of emergency, know how to stop the tractor and disk harrow quickly.
• Always shut down the engine, remove the key and use the handbrake before
leaving the tractor seat.
• Never attempt to change the adjustments, clean or lubricate the equipment while
it is moving.
• Whenever you unhitch the equipment, either in the field or shed, do it on a flat
and firm surface and use 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;
• Use the jacks to support the equipment appropriately;
• The drawbar must be lifted and locked in a vertical position or it must be
removed and fastened to the load;
• Fasten the moving parts that may get loose and cause accidents;
• Underpin the equipment wheels properly;
• Use chock blocks and safety chains to secure the equipment to the truck or
trailer during the transport;
• Stay away from straps, cables or chains that are working under load;
• 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
Working safety standards
It is important to have knowledge not only about the functioning, operation of the
equipment and its technology, but also the working legal aspects when using the equipment,
such as: safety standards, operator's manual and working safety.
The equipment and tools used on the rural area must be properly handled, otherwise
health and safety of involved personnel may be compromised.
The operator must be capable and authorized to operate the tractor, meaning that that
person must comprehend the functioning instructions of the tractor and know about the
safety standards regarding the job that will be performed.
The Ministry of Labor and Employment created safety standards that aim to decrease
the risk of accidents that may occur to the rural worker. Related to the subject of agicultural
machines and equipments, we specifically cited the NR 06, NR 12 and NR 31 standards.
Regulatory Standard - NR 06:
• For purposes of applying this Regulatory Standard, personal protective equipment
(PPE) is considered any device or product that is worn by an individual worker for protection
against risks that could threaten safety and health at work.
Regulatory Standard - NR 12:
• This Regulatory Standard and its annexes provide technical references, basic
principles and protective measures to ensure the health and physical integrity of workers
and establishes minimum requirements for the prevention of accidents and occupational
diseases in the design stages and use of machinery and equipment of all kinds, and also to
its manufacture, importation, trading, exhibition and cession in any way. It is understood as
using phase the construction, transportation, assembly, installation, adjustment, operation,
cleaning, maintenance, inspection, disabling and dismantling of machinery or equipment.
Regulatory Standard - NR 31:
• This Regulatory Standard has the purpose to establish the precept to be applied on
the organization and on the working environment, in order to make compatible the planning
and development of agriculture, livestock, forestry, forest exploration and aquaculture with
safety on the working environment.
To the operator

9
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
To the operator
Lifting points
This planter has adequate lifting points located on the frame. When carrying out any
maintenance or transporting the equipment, it is essential to hitch the cables to these points.
Use chains, of at least 3 meters long, to lift the equipment safely.
Use the adequate points for lifting and be sure that the equipment is safe. Avoid
accidents.
Always keep a safe distance from the equipment.

10 Marchesan 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.
Safety decals
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
A
A
D
D
V
V
E
E
R
R
T
T
Ê
Ê
N
N
C
C
I
I
A
A
/
/
W
W
A
A
R
R
N
N
I
I
N
N
G
G
/
/
A
A
D
D
V
V
E
E
R
R
T
T
E
E
N
N
C
C
I
I
A
A

11
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
To the operator
Safety decals
Qty. Model Serial number
2GCRO 7010 decal set 05.03.03.3943
2GCRO 7012 decal set 05.03.03.3944
2Tatu logotype decal 05.03.03.5340
1Warning decal 05.03.03.1738
4Lifting points decal 05.03.03.4078
1Read the manual decal 05.03.03.1428
1Lubricate and tighten daily decal 05.03.03.1827
1Danger decal 05.03.03.1896
1Danger decal 05.03.03.1739
1Grip coupler colors decal 05.03.03.4499
1Danger decal 05.03.03.3038
Decal set

12 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
Side 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 7.5 mm, Ø 28" x 7.5 mm,
..................................................... Ø 30" x 7.5 mm, Ø 30" x 9 mm,
................................................ Ø 32" x 7.5 mm and Ø 32" x 9 mm
Disc blade type:.................................................... Concave notched and/or concave plain
Bearings - length: .................................................................................................262 mm
- type: ....................................................Oil bath bearing or steel-plated 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 the 'tires inflation' page
Working speed:................................................................................................. 5 - 7 km/h
Transport speed:...................................................................................................30 km/h

13
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 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 54 mm (2.1/8")
Hitching type: ......................................................................................................Drawbar
Tires: ..................................................................................Check the 'tires inflation' page
Working speed:................................................................................................. 5 - 7 km/h
Transport speed:...................................................................................................30 km/h

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

15
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

16 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GCRO 7010 / 7012
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 - Side frames.
• *Thesemeasuresmaysu󰀨erchangesaccordingtothediscbladesize.
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
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 ----
Narrow
48D 9390 6520 2020 430 9310 3495 3050 4400
52 9480 7025 2020 430 9325 3495 3050 4400
56 9555 7535 2020 430 9290 3495 3050 4400
Normal
52 9480 7025 2020 430 9325 3490 3050 4855
56 9555 7535 2020 430 9290 3490 3050 4855
60 9640 8120 2020 430 9325 3490 3050 4855
72 10720 9650 2115 465 10775 4870 3550 6425
76 10840 10175 2115 465 10860 4970 3550 6425
80 11025 10860 2230 500 11025 5030 3550 6425

17
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GCRO 7010 / 7012
Components
01 - Frame 09 - Mechanical leveling system
02 - Front disc gang 10 - Transport lock
03 - Rear disc gang 11 - Depth stops
04 - Wheels 12 - Rear hitch (optional)
05 - Hose support 13 - Jack
06 - Drawbar 14 - Hydraulic system
07 - Tractor hitch 15 - Wrenches
08 - Hydraulic leveling system (optional) 16 - Safety chain
GCRO 7010 / 7012 - non-folding wings
0404
0808
1414
0505
1212
0303
0202
0707
1616 1313
0606
1111
1010
0101
1515
0909

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