KUHN GA6501 User manual

Original instructions
KN255AGB F
Read carefully before starting the machine
OPERATOR'S MANUAL
Gyrorake
A0001 > B0000
GA6501
KN255AGB F
- English - 08-2015

1. - Dear Owner
GA6501
1
KN255AGB F
Gyrorake
1. Dear Owner
In buying a Kuhn machine you have chosen wisely. Into it have gone years of thought, research and
improvement. You will find, as have thousands of owners all over the world, that you have the best that
engineering skill and actual field testing can produce. You have purchased a dependable machine, but only
through proper care and operation can you expect to receive the performance and long service built into it.
This manual contains all the necessary information for you to receive full efficiency from your machine. The
performance you get from this machine is largely dependent on how well you read and understand this
manual and apply this knowledge. Please DO NOT ASSUME YOU KNOW HOW TO OPERATE AND
MAINTAIN YOUR MACHINE before reading this manual carefully. KEEP THIS MANUAL AVAILABLE FOR
REFERENCE. Pass it on to the next owner if you re-sell the machine.
Your KUHN dealer can offer a complete line of genuine KUHN service parts. These parts are manufactured
and carefully inspected in the same factory that builds the machine to assure high quality and accurate
fitting of any necessary replacements.
About improvements
We are continually striving to improve our products. We therefore reserve the right to make improvements
or changes when it becomes practical to do so, without incurring any obligations to make changes or
additions to the equipment sold previously.
Wear parts
Wearing parts fitted on our machines have been tested in very different situations to optimize their service
life. Nevertheless, the service life depends highly on theconditions of use (products to handle, soil, weather
conditions, etc...).
Designated use of the machine
The GA6501 Gyrorake must only be used for the work for which it has been designed: raking on the ground
and forming windrows of pre-mowed fodder and straw.
Document illustrations
The illustrations in this manual may be based on one type of machine only. However, all instructions apply
to all machines covered in this manual.
Copyright 2015 KUHN

GA6501
22. - Contents
KN255AGB F
Gyrorake
2. Contents
1. Dear Owner .....................................................................................................................1
2. Contents..........................................................................................................................2
3. Identification of the machine.........................................................................................5
3.1 Front view (working position)........................................................................................................... 5
3.2 Rear view (transport position)..........................................................................................................5
3.3 Model identification plate ................................................................................................................. 6
3.4 Optional equipment.......................................................................................................................... 6
4. Safety...............................................................................................................................7
4.1 Description of symbols used in this document.................................................................................7
4.2 Safety instructions ...........................................................................................................................8
4.2.1 Introduction......................................................................................................................... 8
4.2.2 Read and follow the safety instructions..............................................................................8
4.2.3 Precautions to be taken before carrying out any operations on the machine..................... 8
4.2.4 Precautions to take before using the machine ................................................................... 9
4.2.5 Precautions when driving ...................................................................................................9
4.2.6 Precautions when driving on public roads........................................................................10
4.2.7 Maximum speed................................................................................................................11
4.2.8 Precautions when coupling...............................................................................................12
4.2.9 Hydraulic circuit................................................................................................................12
4.2.10 PTO shaft..........................................................................................................................13
4.2.11 Precautions during manoeuvres....................................................................................... 14
4.2.12 Remote controlled components........................................................................................15
4.2.13 Tyres.................................................................................................................................15
4.2.14 Safety decals.................................................................................................................... 15
4.2.15 Waste disposal .................................................................................................................15
4.2.16 Precautions for maintenance and repair work.................................................................. 16
4.2.17 Projection of stones and foreign objects........................................................................... 16
4.2.18 Precautions for machine use............................................................................................ 17
4.3 Location and description of safety decals on the machine ............................................................ 18
4.3.1 Location of safety decals..................................................................................................18
4.3.2 Description of safety decals.............................................................................................. 19
4.4 Road safety equipment and recommendations ............................................................................. 21
4.4.1 Tyre pressure.................................................................................................................... 22
4.4.2 Instructions specific to France.......................................................................................... 22

2. - Contents
GA6501
3
KN255AGB F
Gyrorake
5. Machine specifications................................................................................................ 23
5.1 Description and glossary ............................................................................................................... 23
5.2 Technical specifications................................................................................................................. 24
5.3 Compulsory equipment.................................................................................................................. 25
5.3.1 Check chain (Belgium, Spain, France)............................................................................. 25
5.3.2 Lighting and signalling...................................................................................................... 25
5.4 Sound levels.................................................................................................................................. 26
6. Putting into service...................................................................................................... 27
6.1 Description of control elements ..................................................................................................... 27
6.2 Coupling and uncoupling............................................................................................................... 27
6.2.1 Description of coupling elements ..................................................................................... 27
6.2.2 Preparing the tractor......................................................................................................... 28
6.2.3 Coupling the machine.......................................................................................................30
6.2.4 Hydraulic connection........................................................................................................ 31
6.2.5 Electrical connection ........................................................................................................ 31
6.2.6 Primary PTO shaft............................................................................................................ 32
6.2.7 Adjusting the machine......................................................................................................34
6.2.8 Uncoupling the machine................................................................................................... 35
7. Instructions for transport............................................................................................ 37
7.1 Putting the machine into transport position ................................................................................... 37
7.2 Conformity with the road regulations............................................................................................. 39
8. Instructions for work................................................................................................... 40
8.1 Putting the machine into work position.......................................................................................... 40
8.2 Adjustments in working position .................................................................................................... 41
8.2.1 Working width................................................................................................................... 41
8.2.2 Rotor working height ........................................................................................................ 43
8.3 Machine use .................................................................................................................................. 45
8.3.1 Putting the machine in headland turn position ................................................................. 46
8.3.2 Drive speed...................................................................................................................... 46

GA6501
42. - Contents
KN255AGB F
Gyrorake
9. Optional equipment......................................................................................................47
9.1 Steering system ............................................................................................................................. 47
9.1.1 Steering system adjustment ............................................................................................. 47
9.1.2 Lubrication........................................................................................................................ 49
9.2 Check chains ................................................................................................................................. 50
9.3 Clearance lights.............................................................................................................................50
9.4 SMV sign .......................................................................................................................................50
9.5 Europe signalling equipment .........................................................................................................51
9.5.1 Coupling and uncoupling.................................................................................................. 51
9.6 USA signalling equipment.............................................................................................................. 51
9.6.1 Coupling and uncoupling.................................................................................................. 51
10. Maintenance and storage ............................................................................................52
10.1 Frequency chart............................................................................................................................. 52
10.2 Cleaning the machine.................................................................................................................... 53
10.3 Lubrication .....................................................................................................................................54
10.3.1 PTO shafts........................................................................................................................ 55
10.3.2 Grease.............................................................................................................................. 56
10.3.3 Oil.....................................................................................................................................58
10.4 Maintenance .................................................................................................................................. 58
10.4.1 Check angle gearbox oil level........................................................................................... 58
10.4.2 Checking the fixing elements............................................................................................59
10.4.3 Replacing an oscillating shaft...........................................................................................60
10.4.4 Tyre pressure.................................................................................................................... 62
10.5 Storage ..........................................................................................................................................63
10.5.1 At the end of each season................................................................................................63
10.5.2 At the start of each season...............................................................................................63
11. Limited Warranty ..........................................................................................................64

3. - Identification of the machine
GA6501
5
KN255AGB F
Gyrorake
3. Identification of the machine
3.1 Front view (working position)
3.2 Rear view (transport position)
40

GA6501
63. - Identification of the machine
KN255AGB F
Gyrorake
3.3 Model identification plate
Please write below the type and serialnumber of the
machine. This information is to be given to the Kuhn
authorized dealer for any spare parts order or
warranty claim.
Type: GA6501
Serial no.:
3.4 Optional equipment
- Tick box corresponding to the equipment fitted on
your machine:
TYPE
MASSE kg
KUHN S.A.
67700 SAVERNE - FRANCE
N°
MADE IN FRANCE
Steering system.
Check chains.
Clearance lights.
SMV sign.
Europe signalling equipment.
USA signalling equipment.

4. - Safety
GA6501
7
KN255AGB F
Gyrorake
4. Safety
4.1 Description of symbols used in
this document
This symbol indicates a potentially hazardous
situation that if not avoided, could result in serious
bodily injury.
This symbol is used to identify special instructionsor
procedures which, if not followed strictly, could
result in machinery damage.
This symbol is used to communicate technical
information of particular interest.

GA6501
84. - Safety
KN255AGB F
Gyrorake
4.2 Safety instructions
4.2.2 Read and follow the safety instructions
Before using the machine, carefully read all the
safety instructions in this manual and the warnings
placed on the machine.
Before starting work, the operator must be familiar
with all machine controls, handling devices and their
functions. It is too late to learn once work has been
started!
Never let anyone operate the machine who is not
trained to do so.
Should you have any difficulties in understanding
any parts of this manual, please contact your KUHN
dealer.
4.2.3 Precautions to be taken before carrying
out any operations on the machine
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, disengage the
PTO drive, turn off the engine, remove ignition key
and wait until all moving parts have come to a
complete stop and apply park brake.
4.2.1 Introduction
The machine must only be operated, maintained and repaired by competent persons who are familiar with
machines' specifications and operation and aware of safety regulations for preventing accidents.
The operatormust imperatively respect safety instructions in this manual and inthe warnings posted on the
machine. The operator is also obliged to respect current legislation concerning accident prevention, work
safety and public traffic circulation.
Designated use of the machine also means following operation, maintenance and repair recommendations
given by the manufacturer, and using only genuine spare parts, equipment and accessories, as
recommended by the manufacturer.
The manufacturer is not held liable for any damage resulting from machine applications other than those
specified by the manufacturer. Any use other than the designated operation is at the risk and responsibility
of the operator.
The manufacturer is not held liable forany damage or accident resulting from machine modifications carried
out by the operator himself or by a third party without previous written agreement from the manufacturer.

4. - Safety
GA6501
9
KN255AGB F
Gyrorake
4.2.4 Precautions to take before using the
machine
Do not wear loose clothing which could become
caught up in moving parts.
Wear the appropriate protective clothing for the
work in hand (gloves, shoes, goggles, helmet, ear
defenders, etc.).
Ensure that all operating controls (ropes, cables,
rods, etc) are placed so as they cannot be operated
unintentionally and cause damage or injury.
Before operating the machine, check tightness of
nuts and bolts, particularly on fixing elements (tines,
forks, blades, knives, etc). Retighten if necessary.
Before operating the machine, ensure that all the
safety guards are firmly in place and in good
condition. Immediately replace any worn or
damaged guard.
4.2.5 Precautions when driving
Tractor handling, stability, performance and braking
efficiency are all affected by weight distribution,
trailed or mounted implements, additional ballast
and driving conditions. It is therefore of great
importance that the operator exercises caution in
every given situation.
Groundspeed must be adapted toground conditions
as well as to roads and paths. Always avoid abrupt
changes of direction.
Be particularly cautious when turning corners,
paying attention to machine overhang, length,
height and weight.
Never use a narrow track tractor on very uneven or
steeply sloping ground.
Never leave the tractor seat while the machine is
operating.
Carrying people or animals on the machine when
working or in transport is strictly forbidden.

GA6501
10 4. - Safety
KN255AGB F
Gyrorake
4.2.6 Precautions when driving on public
roads
Dimensions
Depending on the dimensions of the machine, contact
the relevant authorities to ensure that it can be legally
transported on public roads.
If the machine is over the maximum legal size, follow the
local regulations for special transportation of oversize
equipment.
Gross weight and weight per axle
Respect the tractor gross weight, its lift capacity or the
permissible maximum load on the attachment and the
maximum load per axle.
The front axle load (1) must never, under any
circumstances, be less than 20% of the tractor's unladen
weight. If necessary, add ballast weights to the front or
to the rear to preserve the steering and braking
efficiency.
Do not exceed the gross machine weight rating or the
maximum machine axle load allowed.
Transport position
Before transporting the machine on public roads, place
the machine into its transport position, according to the
instructions in this manual.
kg
lb
kg
lb
1
For machines with hoppers or tanks:
- If the total weight exceeds the machine's total gross weight, empty the hopper to travel on public
roads.
- In any case, we recommend to travel on public roads with empty hoppers and tanks.

4. - Safety
GA6501
11
KN255AGB F
Gyrorake
Lights and indicators
Before transporting the machine on public roads, ensure
that all legally required lightings and signallings are in
place.
Ensure that lightings and signallings are clean and in
good working order. Replace any missing or broken
equipment.
4.2.7 Maximum speed
- Always keep to the legal speed limit for driving a
tractor-machine assembly on public roads.
Always obey current regulations for driving
on roads.

GA6501
12 4. - Safety
KN255AGB F
Gyrorake
4.2.8 Precautions when coupling
Before attaching the machine, make sure that it
cannot accidentally start moving (chock the wheels)
and that the parking stand is in the right position.
The machine must only be attached to the hitch
points provided for this purpose.
Never stand between the tractor and the machine
when operating the three point linkage.
Do not stand between the tractor and the machine
without ensuring that the parking brake is applied.
4.2.9 Hydraulic circuit
Caution! The hydraulic circuit is under high
pressure. Maximum pressure at work: 200 bar.
Before connecting hoses to the tractor hydraulics,
ensure that tractor and machine circuits are not
under pressure. Before disconnecting a hose,
depressurize the hydraulic circuit.
To avoid making incorrect connections, mark
hydraulic couplers and corresponding hoses with
colors. WARNING! Functions could be reversed (for
example: lift/lower) and cause accidents.
Regularly check the hydraulic hoses. In case of
normal wear, replace the hydraulic hoses every 5
years. Damaged or worn hoses must immediately
be replaced. When replacing the hydraulic hoses,
only use hoses with the specification recommended
by the manufacturer of the machine.
To locate a leak, use appropriate means. Protect
body and hands from liquid under pressure.
Any liquid under pressure (particularly oil from
hydraulics) can penetrate the skin and causesevere
injury. If injured, see a doctor immediately, there
could be danger of infection.
Before any adjustments, maintenance or repairs are
carried out, lower the machine to the ground,
depressurize the hydraulics, turn off the engine,
remove ignition key and wait until all moving parts
have come to a complete stop.

4. - Safety
GA6501
13
KN255AGB F
Gyrorake
4.2.10 PTO shaft
Use only PTO shafts supplied with the machine or
recommended by the machine manufacturer.
The protective shield of the tractor PTO stub, the
PTO shaft guards and the protective shield of the
machine input shaft must always be in place and in
good condition.
Make sure that the PTO shaft guards are secured
with the safety chains provided. Check that the PTO
shaft guard can turn freely a full rotation
independent of the shaft.
Any worn or damaged guards must be replaced
immediately. A worn guard or an unprotected PTO
shaft can cause a serious or even a lethal accident.
Do not wear loose clothing that could be caught in
the rotating PTO shaft.
Before attaching or removing a PTO shaft, or before
doing any work on the machine, disengage the PTO
drive, turn off the engine, remove ignition key and
wait for all moving parts to come to a complete stop.
If the primary PTO shaft is equipped with a torque
limiter or a free wheel, these must be fitted on the
machine side.
Ensure that the PTO shaft is always correctly fitted
and locked into place.
Before connecting the PTO shaft, ensure that the
PTO speed (rotational frequency) and direction of
rotation are in line with the machine manufacturer's
recommendations.
Before engaging the PTO drive, make sure that
there are no people or animals near the machine.
Never engage the PTO drive when the tractor
engine is stopped.

GA6501
14 4. - Safety
KN255AGB F
Gyrorake
Do not install any adapter device that results in a
portion of the tractor PTO stub, the rotating PTO
shaft, or the adapter to be unguarded. The tractor
master shield shall overlap the end of the splined
shaft and the added adaptor device as outlined in
the table.
When uncoupling the machine, rest the PTO shaft
on the support specially provided, and replace
protective shield on the PTO stub of the tractor.
Read and follow the instructions in the operator's
manual provided with the PTO shaft.
4.2.11 Precautions during manoeuvres
When moving the machine from the transport
position to the working position and vice versa,
make sure that nobody is within the machine
pivoting area.
A
PTO type Diameter X splines
A
±5 mm (0.20’’)
135 mm
(1.378’’) 685 mm (3.35’’)
235 mm
(1.378’’) 21 85 mm (3.35’’)
345 mm
(1.772’’) 20 100 mm (4.00’’)

4. - Safety
GA6501
15
KN255AGB F
Gyrorake
4.2.12 Remote controlled components
Danger of crushing and shearing can exist when
components are operatedby hydraulic or pneumatic
controls. Keep away from these danger zones.
4.2.13 Tyres
Regularly check the tyre pressure. Respect
manufacturers' recommendations on pressure.
Assembly, disassembly and repair of wheels and
tyresmustonlybecarried out bycompetentpersons
who are equipped with standardized tools. Before
any work is performed on the wheels, ensure that
the machine rests on the ground and is perfectly
stable so that it cannot move accidentally (put
chocks in place).
4.2.14 Safety decals
Safety warning decals are placed in pictorial form on
various parts of the machine. They are there to warn
you of potential dangers and to tellyou how to avoid
accidents.
Always keep the safety decals clean and readable,
and replace them when they are worn, damaged,
missing or illegible.
4.2.15 Waste disposal
Respect the environment! Never spill pollutants (oil,
grease, filters, etc.) on the ground, never pour them
down the drain and never discard them in any other
place where they could pollute the environment.
Never throw away or burn a tyre. Always take waste
to specialized recycling or waste disposal centers.

GA6501
16 4. - Safety
KN255AGB F
Gyrorake
4.2.16 Precautions for maintenance and repair
work
Before leaving the tractor or before adjusting,
maintaining or repairing the machine, disengage the
PTO drive, turn off the engine, remove ignition key
and wait until all moving parts have come to a
complete stop and apply park brake.
Rest the machine on the ground, release the
pressure from the hydraulic circuit and leave the
machine to cool down.
Make sure that the parts of the machine that need to
be lifted for maintenance or repair work are firmly
propped up.
Before any work is done on the electric circuit or
before any electric welding is carried out on the
attached machine, disconnect the machine from the
tractor electrical circuit. Also disconnect alternator
and battery terminals.
Repairs on elements under pressure or tension
(springs, pressure accumulators, etc.) must only be
carried out by competent persons with regulation
equipment.
Wear the appropriate protective clothing for the
work in hand (gloves, shoes, goggles, helmet, ear
defenders, etc.).
Do not solder, weld or use a blow torch near fluids
under pressure or inflammable products.
For your own safety and for correct machine
operation, only use original manufacturer parts.
4.2.17 Projection of stones and foreign
objects
For driver safety, always use a tractor equipped with
a cab. Never start a gyrorake when there are people
nearby. Even when the machine is used in
accordance with its purpose, objects may be
projected. Stones and other foreign objects
projected by the moving parts can travel a
considerable distance. Keep all persons and
animals away from the danger zone.

4. - Safety
GA6501
17
KN255AGB F
Gyrorake
4.2.18 Precautions for machine use
Before using the machine, check tools (tines) and
their attachment hardware in accordance with the
instructions of the present manual.
Check the guards regularly. Immediately replace
any damaged or missing elements.
Before engaging the pto drive, lower the rotors onto
the ground. Make sure all the guards are in place.
Keep all persons and animals away from the danger
zone.
Stay a safe distance from the Gyrorake when rotors
are moving.
Never reverse while raking.
After the power source has stopped, the rotors can
continue turning for a time. Stay away from the
machine until all moving parts have come to a
complete standstill.
If an obstacle is hit, disengage the PTO drive, stop
the tractor engine, remove the ignition key and wait
for all moving parts to come to a complete standstill.
Check the entire machine for any damage before
resuming work.

GA6501
18 4. - Safety
KN255AGB F
Gyrorake
4.3 Location and description of safety
decals on the machine
4.3.1 Location of safety decals
1
2
4
5
4
3
5
3