KUHN GA8121 User manual

Original instructions
KN202BGB F
OPERATOR'S MANUAL
Gyrorake
GA8121
KN202BGB F
- English - 09-2014

Dear Owner
Gyrorake
GA8121
1
KN202BGB F
$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. It therefore reserves 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 the conditions of use (products to handle, soil, weather
conditions, etc...).
Designated use of the machine
The GA8121 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 2014 KUHN

Gyrorake
2
GA8121
Contents
KN202BGB F
$Contents
Dear Owner.....................................................................................................................1
Contents..........................................................................................................................2
Identification of the machine.........................................................................................4
Rear view (working position)...........................................................................................................4
Rear view (transport position).........................................................................................................4
Model identification plate ................................................................................................................5
Optional equipment..........................................................................................................................6
Safety...............................................................................................................................7
Description of symbols used in this document.............................................................................7
Safety instructions...........................................................................................................................8
Location and description of safety decals on the machine .......................................................18
Road safety equipment and recommendations...........................................................................21
Machine specifications................................................................................................24
Description and glossary...............................................................................................................24
Technical specifications................................................................................................................26
Compulsory equipment .................................................................................................................27
Sound levels ...................................................................................................................................28
Putting into service......................................................................................................29
Description of control elements....................................................................................................29
Coupling and uncoupling..............................................................................................................29
Instructions for transport............................................................................................40
Putting the machine into transport position................................................................................40
Conformity with the road regulations...........................................................................................43

Contents
Gyrorake
GA8121
3
KN202BGB F
Instructions for work................................................................................................... 44
Putting the machine into work position.......................................................................................44
Adjustments in working position..................................................................................................46
Machine use....................................................................................................................................51
Optional equipment.....................................................................................................55
1 3/8’’ - 6 spline pto shaft...............................................................................................................55
1 3/8’’ - 6 spline pto shaft (With free wheel clutch) .....................................................................55
32x38 - 8 spline pto shaft...............................................................................................................55
Flow divider ....................................................................................................................................56
Swath curtain..................................................................................................................................57
Bogie axle suspension ..................................................................................................................58
3D axle suspension........................................................................................................................58
Check chains..................................................................................................................................58
Bogie axles .....................................................................................................................................59
SUPERBALLOON spare wheel......................................................................................................60
7 pin plug (Only for North America) .............................................................................................60
Spacer for straw .............................................................................................................................60
Clearance lights..............................................................................................................................61
SMV sign.........................................................................................................................................61
Maintenance and storage............................................................................................ 62
Frequency chart .............................................................................................................................62
Cleaning the machine....................................................................................................................63
Lubrication......................................................................................................................................63
Maintenance....................................................................................................................................71
Storage............................................................................................................................................77
Limited warranty.......................................................................................................... 78

Gyrorake
4
GA8121
Identification of the machine
KN202BGB F
$Identification of the machine
1. Rear view (working position)
2. Rear view (transport position)

Identification of the machine
Gyrorake
GA8121
5
KN202BGB F
3. Model identification plate
Please write below the type and serial number of the
machine. This information is to be indicated to the dealer
for all spare parts orders.
Type: GA8121
Serial no.:
TYPE
MASSE kg
KUHN S.A.
67700 SAVERNE- FRANCE
N°
MADEIN FRANCE
TYPE
MASSE kg
KUHN S.A.
67700 SAVERNE - FRANCE
N°
MADE IN FRANCE

Gyrorake
6
GA8121
Identification of the machine
KN202BGB F
4. Optional equipment
Tick box corresponding to the equipment fitted on your
machine:
PTO shaft
1 3/8 - 6 spline pto shaft.
1 3/8 - 6 spline pto shaft (PTO shaft with free wheel).
32x38 - 8 spline pto shaft (With free wheel clutch + Cam type cut-out clutch).
Flow divider.
Swath curtain.
Bogie axle suspension.
3D axle suspension.
Check chains.
Bogie axles.
SUPERBALLOON spare wheel.
7 pin plug (Only for North America).
Spacer for straw.
Clearance lights.
SMV sign.

Safety
Gyrorake
GA8121
7
KN202BGB F
$Safety
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 instructions or
procedures which, if not followed strictly, could result in
machinery damage.
This symbol is used to communicate technical
information of particular interest.

Gyrorake
8
GA8121
Safety
KN202BGB F
2. Safety instructions
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 certain
parts in this manual, please contact your KUHN dealer.
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.
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 operator must imperatively respect safety instructions in this manual and in the 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 for any 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.

Safety
Gyrorake
GA8121
9
KN202BGB F
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.
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 to ground 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.

Gyrorake
10
GA8121
Safety
KN202BGB F
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.

Safety
Gyrorake
GA8121
11
KN202BGB F
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.
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.

Gyrorake
12
GA8121
Safety
KN202BGB F
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.
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 disconnectinga 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 cause severe
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.

Safety
Gyrorake
GA8121
13
KN202BGB F
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 all people
and animals are clear from the machine. Never engage
the PTO drive when the tractor engine is stopped.

Gyrorake
14
GA8121
Safety
KN202BGB F
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.
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.
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’’)
A

Safety
Gyrorake
GA8121
15
KN202BGB F
Remote controlled components
Danger of crushing and shearing can exist when
components are operated by hydraulic or pneumatic
controls. Keep away from these danger zones.
Tyres
Regularly check the tyre pressure. Respect
manufacturers' recommendations on pressure.
Assembly, disassembly and repair of wheels and tyres
must only be carried out by competent persons 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).
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 tell you how to avoid
accidents.
Always keep the safety decals clean and readable, and
replace them when they are worn, damaged, missing or
illegible.
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.

Gyrorake
16
GA8121
Safety
KN202BGB F
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.
It is strongly recommended to have your machine
checked by your Kuhn dealer after each season,
especially tools and their attaching hardware.

Safety
Gyrorake
GA8121
17
KN202BGB F
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.
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.

Gyrorake
18
GA8121
Safety
KN202BGB F
3. Location and description of safety
decals on the machine
Location of safety decals
1
2
4
5
3
4
5
3