Tatu Marchesan GNACR User manual

INSTRUCTIONS MANUAL
GNACR

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. GNACR
The GNACR model - Folding wheel offset disk harrow - was
specially designed to work over large areas with a high productivity,
pulled by large tractors to break the clods and level the soil. This
will assure that the soil is in great conditions to plant any type of
grain.
The harrow has tilting sides and wheelsets that are hydraulic
activated by the tractor cab, making it easier to transport the
equipment on narrow roads, under bridges, etc.
The simultaneous side tilting is done by the hydraulic cylinders
placed on the central frame.
During operations, the sides articulate to adapt in several types of
soil, including terraced slopes, to clod break them.
This instructions manual contains the necessary information for the
best performance of this disk harrow. The operator must carefully
read the entire manual before working with the equipment. 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.
Introduction

2Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
Table of contents
1. To the owner 03
2. To the operator 04 to 09
3. Data sheet 10
4. Components 11 & 12
5. Assembly 13 to 26
Using the set of wrenches 13
Assembly of bearings and spacer spools 14 to 16
Disc gangs assembly sequence 17 & 18
Joining the frames 19
Assembly of disc gangs on the frame / Scrapers assembly 20
Assembly of the disc gang carriers on the frame / Tires assembly 21
Traction set assembly / Assembly of the jack stand and hose support 22
Hydraulic cylinder assembly 23 & 24
Hydraulic circuit (64, 72 or 84 disc blades) 25
Hydraulic circuit (96 or 108 disc blades) 26
6. Working preparation 27 to 29
Tractor preparation / Harrow preparation / Hitching to the tractor 27 & 28
Jack stand position 28
Important recommendations 29
7. Adjustments and operations 30 to 34
Locking the frames for transportation 30
Cutting depth adjustment 31
Ways to start the harrowing 32
Direction of the maneuvers 33
Operations - Important points 34
8. Maintenance 35 to 38
Lubrication 35
Lubrication points 36
Harrow maintenance / Maintenance precautions 37
Lifting points 38
9. Important data 39 to 41
Calculation of hourly income 39
Average income table 40
Torque table 41
10. Important 42

3
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
General information
Important
To the owner
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.
The acquisition of any TATU product assures to the original purchaser the following
rights:
• Warranty certificate;
• Instructions 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 on 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, 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 S/A.
NOTE

4Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
To the operator
Dear user!
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
spilled to the soil and can penetrate to the underground layers,
compromising nature. Ecological and conscious disposal of them
should be done.
Working safely
• 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 or third parties, therefore it should be carefully read
and observed.
Read and understand the information before making any
adjustment or maintenance.
Be careful with the environment
The GNACR 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,
observations and prudence during the harrowing, transportation,
maintenance and storage.
Have extreme caution when operating with the power take-off
(PTO). Do not get closer during operation.

5
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
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
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 maintenance operations
and to transport the equipment.

6Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
To the operator
• Only trained and qualified personnel is 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. Provide the delineation
of obstacles or hazardous locations. Use the speed which is suitable to the
conditions of the ground or pathways to be covered.
• 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 proper protective devices.
• Be careful while hitching the drawbar to the tractor.
• Wear protective gloves to work near the disc blades.
• When setting the harrow to transport position, check if there are no people or
animals close or under it.
• Never attempt to change the adjustments, clean or lubricate the equipment while
it is moving.
• In case of emergency, know how to stop the tractor and harrow quickly.
• Always shut down the engine, remove the key and use the handbrake before
leaving the tractor seat.
• Only drive the equipment using tractors with appropriate power.
• Carefully check the transport width on narrow locations.
• Whenever you unhitch the equipment, either in the field or shed, do it on a flat
and firm surface and use the parking stands. Make sure the equipment is properly
supported.
• Please check the general safety instructions on the back cover of this manual.

7
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
Truck or trailer transportation
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 may cause a serious accident.
• When lifting with a hoist, use the appropriate points to lift.
• Underpin the equipment appropriately.
• Use chock blocks and safety chains to secure the equipment to the truck or trailer
during the transport.
• 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.
GNACR
The safety stickers warn about the equipment points that require more attention and
they should be kept in good repair. If these stickers become damaged or illegible, replace
them. Marchesan provide stickers, upon request and indication of the respective serial
number.
To the operator
ATENÇÃO
ATTENTION
ATENCIÓN
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.
Safety stickers
P E R I G O / D A N G E R /
P E L I G R O
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

9
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
Sticker set
Model Serial number
GNACR 05.03.03.3987
Tatu logo 05.03.03.3933
LUBRIFICAR E REAPERTAR DIARIAMENTE
LUBRICAR Y REAPRETAR DIARIAMENTE
L U B R I C A T E A N D T I G H T E N D A I LY
05.03.03.1827
PERIGO / DANGER / PELIGRO
05.03.03.1896
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
ADVERTÊNCIA / WARNING /
ADVERTENCIA
To the operator

10 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
Data sheet
Type: .............................................................................Folding wheel offset disk harrow
Model: ................................................................................................................GNACR
Number of disc blades: ................................................................... 64, 72, 84, 96 or 108
Spacing between disc blades:.............................................................................200 mm
Discs dimension: ........................................................................................ 20" x 3.5 mm
........................................................................................ 22" x 4.5 mm
Disc blade type - Front gang: ............................................................... Concave notched
- Rear gang: .................................................................... Concave plain
Bearings - Length: ..............................................................................................196 mm
- Type: ..................................................................................Duromark oil bath
Spacer spools - Length: ......................................................................................196 mm
- Type: .............................................................................................. Cast
Axle diameter:.............................................................................................. Ø 38.1 mm (1.1/2")
Hitching type: ...............................................................................................Traction bar
Working speed:........................................................................................... 7 to 12 Km/h
Tires (64,72 or 84 disc blades):................................................11L 15 - 10 tarps (52 PSI)
Tires (96 or 108 disc blades):.................... 11L 15 - 10 tarps (52 PSI) or 400/60 (52 PSI)*
Model Number of
disc blades
Cutting width
(mm)
Transport width
(mm)
Net Weight
(kg)
Tractor
required (cv)
GNACR
64 6200 3200 4715 220 - 240
72 7000 3200 4960 240 - 260
84 8200 3350 5215 260 - 280
96 9400 4100 6268 280 - 310
108 10550 4250 6824 310 - 330
* The 400/60 tires are supplied as an optional part.

11
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
Components
GNACR (64, 72 or 84 disc blades)
01 - Central frame 09 - Left rear frame
02 - Right side frame 10 - Central wheelset
03 - Left side frame 11 - Hydraulic cylinders
04 - Central front frame 12 - Hitch bar
05 - Central rear frame 13 - Tractor hitch
06 - Right front frame 14 - Jack stand
07 - Right rear frame 15 - Lateral wheelset
08 - Left front frame
03
02 01
04
05
06
07
08
09
15
15
11
11
11
12
13 14
11
10

12 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
Components
GNACR (96 or 108 disc blades)
01 - Central frame 09 - Left rear frame
02 - Right side frame 10 - Central wheelset
03 - Left side frame 11 - Lateral wheelset
04 - Central front frame 12 - Hydraulic cylinders
05 - Central rear frame 13 - Hitch bar
06 - Right front frame 14 - Tractor hitch
07 - Right rear frame 15 - Jack stand
08 - Left front frame
01
02
03
04
05
06
07
09
08
10
10
11
11
12
12
12
12
13
14 15

13
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
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.
Use two box end wrenches (A) 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 L shaped socket wrench (B) to tighten the nuts of the bearing bolts.
Use the L shaped socket wrench (C) to tighten the nuts of the traction unit.
C
A
B

14 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
Assembly
Assembly of bearings and spacer spools
Before starting to assemble the disc gangs, check the correct position of the bearings
and spacer spools.
Spacer spool
Bearing
GNACR - 64 discs
18 bearings
40 spacer spools
GNACR - 72 discs
18 bearings
48 spacer spools

15
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
Assembly
GNACR - 84 discs
18 bearings
60 spacer spools
GNACR - 96 discs
24 bearings
60 spacer spools
Spacer spool
Bearing
Assembly of bearings and spacer spools

16 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
Assembly
GNACR - 108 discs
24 bearings
72 spacer spools
Spacer spool
Bearing
Assembly of bearings and spacer spools

17
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A. GNACR
Assembly
Disc gangs assembly sequence
IMPORTANT Check the correct side of the bearings and spacer spools according
to the concavity of the disc blades.
Place the outer lock (A) along with the axle (B).
Tighten the nut (C) passing 5 mm from the axle face.
Place the disc blades (D), bearings (E) and spacer spools (F), following the instructions
on the previous pages (14 to 16).
Place the inner lock (G) and nut (C-1).
Place the bolt (H) that holds the lock nut (I), along with the spring washer and nut
(only on the outer side of the gangs).
Use the wrenches (A) from page 13 to tight the gangs, as follows:
1) Place one of the wrenches on the outer side of the gang (locked side), supporting
it on the ground.
2) On the inner side, use the other wrench and tighten the gangs to get maximum
torque.
3) To tighten, the gangs must remain underpinned with a piece of wood or another
object, preventing it from moving.
Lastly, put the bolt (H-1) and place the lock nut (I-1), fixing with a spring washer and
nut.

18 Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
GNACR
Axle torque
Axle diameter Ft. - lbs.
1.1/2" 1600
1.5/8" 1900
2.1/8" 2100
2.1/2" 2300
Assembly
Consult torque table on page 41.
NOTE
A
B
C
D
D
E
F
GC-1
H
H-1
I-1
I