KUHN GF 5801 MH User manual

ASSEMBLY / OPERATOR'S MANUAL
GF 5801 MH / MHO GYROTEDDER
N° 95222 C.GB - 10.2003

DEAR OWNER,
In buying a KUHN machine you have chosen wisely. Into it have gone years of thought,
researchandimprovements.Youwillfind,ashavethousandsofownersallovertheworld,that
you have the best that engineering skill and actual field testing can produce. You have
purchased a dependable machine, but only by 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.Theperformanceyougetfromthismachineislargelydependantuponhowwellyou
readandunderstandthismanualandapplythisknowledge.PleaseDONOTASSUMETHAT
YOU KNOW HOW TO OPERATE AND MAINTAIN YOUR MACHINE before reading this
manual carefully. KEEP THIS MANUAL AVAILABLE FOR REFERENCE.
YourKUHN dealerwillinstruct youonthegeneral operationofyourmachine. He isinterested
that you get the best performance possible and will be glad to answer any special questions
that may arise regarding the operation of the KUHN 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.
When ordering service parts it is important that you indicate the type of machine concerned
and its serial number.
Forthisreasonpleasecompletethemodelidentificationplatediagrambelowwiththerequired
information. This will provide you with an easy reference for future service parts orders.
ABOUT IMPROVEMENTS
KUHN iscontinuallystriving to improveitsproducts and,therefore,reserves the righttomake
improvements or changes when it becomes practical to do so, without incurring any
obligations to make changes or additions to the equipment sold previously.

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CONTENTS
Safety __________________________________________ 2
Safety decals - Model identification plate _______________ 8
Technical specifications ____________________________ 10
Assemblyinstructions ______________________________ 10
Attachment:
- to the tractor____________________________________ 14
- PTO shaft______________________________________ 14
Working position and adjustments ____________________ 16
Transport position_________________________________ 20
Parking the machine ______________________________ 22
Lubrication ______________________________________ 24
Optional equipment _______________________________ 26
Conditionsof limited warranty ________________________ 29
Copyright 2003 KUHN S.A.

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SAFETY ADVICE
The above symbol is used throughout this manual every time recommendations are made concerning your
safety, the safety of others, or the good operation of the machine.
These recommendations must be made known to all machine operators.
DESIGNATED USE OF THE MACHINE
The GF 5801 MH / MHO Gyrotedder must only be used for the work for which it has been designed : spreading
andturningpre-mowedfodderandstraw.Whenfittedwithareductiongearbox,theGF 5801 MH/MHO canalso
be used for forming small night swaths in order to reduce the amount of humidity getting into the crop overnight.
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.
Designated use of the machine also means :
- following operation, maintenance and repair recommendations given by the manufacturer ;
- using only genuine spare parts, equipment and accessories as designated by the manufacturer.
TheGF5801MH/MHOGyroteddermustonlybeoperated,maintainedandrepairedbycompetentpersonswho
are familiar with machine specifications and operation and are aware of any danger involved.
The operator must imperatively respect current legislation concerning :
- accident prevention,
- work safety,
- public traffic circulation.
All safety advice indicated on the machine must be strictly observed.
The manufacturer is not held liable for any damage resulting from machine modifications carried out by the
operator himself or by a third party without previous written agreement from the manufacturer.

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GENERAL SAFETY RECOMMENDATIONS
Before operating the machine, always ensure that tractor and machine are in accordance with work safety and
road traffic regulations.
BASIC PRINCIPLES
1. In addition to the recomendations given in this manual, legislation on work safety and accident prevention
must also be respected.
2. Advice is indicated on the machine, specifying safety recommendations in order to prevent accidents.
3. When travelling on public roads, the operator must respect all road traffic regulations.
4. Before starting work, the operator must be familiar with all machine controls, handling devices and their
functions. Once at work, it is too late to do so!
5. Useatractorequippedwithasafetycab.Keepwindowsandroofhatchclosedforreducedsoundlevelwhile
operating the PTO drive implement.
6. Beforestartingupthemachineandbeginningwork,checkthesurroundingarea(bewareofchildren!).Make
sure there is sufficient visibility.
Keep all people and animals away from the danger zone of the machine (risk of projection!).
7. Carrying people or animals on the machine when working or in transport is strictly forbidden.
8. Machine must only be attached to tractor using means provided and in accordance with current safety
standards.
9. When attaching or removing the machine, place the parking stand into the corresponding position.
10. Special care should be taken when attaching or removing the machine from the tractor.
11. Before attaching the machine, ensure that the front tractor axle is sufficiently ballasted.
Ballast is to be placed on the supports provided in accordance with instructions of the tractor manufacturer.
12. Do not surpass the maximum axle load or the overall transport weight as prescribed by the manufacturer.
13. Do not exceed the maximum transport width authorized by road traffic regulations.
14. Before transporting the machine on public roads, ensure that all legally required guards and indicators
(lights, reflectors ...) are in place and in good operation.
15. All operating controls (cords, cables, rods...) must be positioned so that they cannot be set off accidently,
risking accident or damage.
16. Before traveling on public roads, put the machine into its transport position as instructed in this operator’s
manual.

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17. Never leave the tractor seat while the machine is operating.
18. Drive speed must be adapted to ground conditions as well as to roads and paths.
Always avoid abrupt changes of direction.
19. Precision steering, tractor adherence, road holding and efficient braking are influenced by the type of
implement, weight, ballast of front axle, ground or road conditions. It is therefore of utmost importance to
be cautious in every given situation.
20. Be particularly cautious when turning corners, paying attention to machine overhang, length, height and
weight.
21. Keep clear of the machine operating area.
22. WARNING ! Danger of crushing and shearing can exist when components are operated by hydraulic or
pneumatic controls.
23. Before leaving the tractor or before adjusting, maintaining or repairing the machine, turn off the engine,
remove the ignition key and wait until all moving parts have come to a complete stop.
24. Do not stand between the tractor and the machine unless the hand brake is tight and/or stops have been
placed under the wheels.
25. Beforeanyadjustments, maintenance or repairsarecarried out, ensure thatthemachinecannot be started
up accidentally.
PRECAUTIONS TO BE TAKEN BEFORE OPERATING THE MACHINE
1. Do not wear loose clothing which could be caught up in moving parts.
2. Wear the individual protection equipment corresponding to the work which is planned (gloves, shoes, eye
protection, helmet, ear protectors...).
3. All operating controls (cords, cables, rods ...) must be positioned so that they cannot be set off accidentally,
causing accident or damage.
4. Beforeoperatingthemachine,check thetightnessofallnutsandbolts, particularly onrotatingparts(blades,
tines, knives, spades ...)
5. Beforeoperatingthemachine, ensurethatallsafety guards are firmly in place andingoodcondition.Ifworn
or damaged, replace immediately.
ATTACHMENT
1. When attaching or removing the machine from the tractor, position hydraulic lift control lever in such a way
that it cannot be set off accidentally.
2. When attaching the machine to the tractor 3-point linkage, ensure that diameter of the link pins corresponds
to the diameter of the ball joints.
3. WARNING ! Danger of crushing and shearing can exist in the lifting zone of the 3-point linkage !
4. Donotstandbetweenthetractorandthemachinewhenoperatingtheoutercontrolleveroftheliftmechanism.
5. In transport, the machine lift mechanism should be stabilized by tractor tie rods to avoid floatation and side
shifting.
6. When transporting the machine in the raised position, lock the lift control lever in place.

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POWER TAKE-OFF
1. Use only the PTO shaft supplied with the machine or recommended by the manufacturer.
2. PTO guards must always be in place and in good condition.
3. Check for correct PTO overlap when at work and in transport.
4. Before attaching orremoving the PTOshaft, disengage PTOshaft, turn offengine and removeignition key.
5. If a primary PTO shaft is equipped with a slip clutch or a free wheel, these must be fitted on the machine
PTO.
6. Ensure that PTO shaft is always correctly fitted and locked into place.
7. Make sure guards are correctly in place and secured with the safety chains provided.
8. Before engaging PTO, ensure that PTO speed (rotational frequency) and direction of rotation are in
accordance with manufacturer's recommendations.
9. Before engaging PTO, keep all people and animals clear from the machine.
10. Never engage PTO shaft when tractor motor is turned off.
11. Never surpass the PTO angle recommended by the manufacturer.
12. WARNING!Rotating elements cancontinueturning momentarily after PTOisdisengaged. Keep clear until
all rotating elements are at a standstill.
13. When removing the machine, place PTO shaft on the supports provided.
14. Fit the safety cap on tractor PTO.
15. Replace any worn or damaged PTO guards immediately.
Rotation speed ... rpm (American Measure) is also expressed in metric measure : Rotational frequency ... min-1.
Both units are equivalent, for example : Rotation speed 540 rpm equals Rotational frequency 540 min-1.

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HYDRAULIC SYSTEM
1. Beware ! The hydraulic circuit is under pressure (maximum working pressure : 200 bars/2900 psi).
2. When fitting hydraulic motors or cylinders, ensure that connections have been made correctly, as per
manufacturer’s instructions.
3. Before connecting hoses to the tractor hydraulics, ensure that tractor and machine circuits are not under
pressure.
4. It is strongly recommended that the operator mark the hydraulic connections between tractor and machine
to avoid making a wrong connection. WARNING ! Functions could be reversed (for example : lift/lower).
5. Regularly check the hydraulic hoses ! Replace the hydraulic hoses every 5 years. Damaged or worn hoses
must immediately be replaced .
When replacing the hydraulic hoses, make sure to use hoses with the specifications and quality
recommended by the manufacturer of the machine.
6. Should a leak be found, take all necessary precautions to avoid accidents.
7. 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.
8. Beforeanyadjustments,maintenanceorrepairsarecarriedout,lowerthemachine,depressurizethecircuit,
turn off the engine and remove ignition key.
TIRES
1. Beforeanyadjustments,maintenanceorrepairsarecarriedout,ensurethatthe machinerestsontheground
and is perfectly stable so that it cannot move accidentally (put wedges in place).
2. Assembly, disassembly and repair of wheels and tires must only be carried out by competent persons who
are equipped with standardized tools.
3. Check tire pressure regularly !
Respect manufacturer’s recommendations on tire pressure.
MAINTENANCE
1. Before checking for any machine malfunction and before adjusting, maintaining or repairing the machine,
disengage PTO, turn off engine and remove ignition key.
2. Check tightness of nuts and bolts regularly. Retighten if necessary.
3. If the machine is raised, prop it up in a stable position before carrying out any maintenance work.
4. When replacing a working part, wear protection gloves and only use standardized tools.

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5. It is forbidden to discard any oil, grease or filters. These must be given to waste disposal organisations to
protect the environment.
6. Disconnect power source before any work is done to the electric system.
7. Checksafetyguardsregularly,particularlythosethataresubjecttowear.Replace immediately if damaged.
8. Spare parts usedmust be inaccordance with specificationsand standards as definedby the manufacturer.
Use only genuine KUHN parts !
9. Before any electric welding is carried out on tractor or attached machine, disconnect generator and battery
terminals.
10. Repairs on elements under pressure or tension (springs, accumulators etc...) must only be carried out by
competent persons with standardized equipment.
SPECIAL SAFETY RECOMMENDATIONS
When changing the machine over from the work to the transport position or vice versa, danger of crushing and
shearing can exist.
Be especially careful and keep all persons away from vicinity of the machine when manoeuvring.

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The following safety pictorials have been placed on your machine in the areas indicated. They
are intented for your personal safety and for the safety of the people working with you. The
text shown on them gives their precise meaning. Keep the pictorials clean. Replace them when
they are faded.
SAFETY DECALS
MODEL IDENTIFICATION PLATE
1

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2
4
3
5
7
6

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GF 5801 MH GF 5801 MHO
Attachment for tractors cat. 2 and 3
Numberofrotors/tinearmsperrotor 6 / 5 6 / 5
Workingwidth(DIN11220) 5.75 m / 18'10" 5.75 m / 18'10"
Width inworking position 6.00 m / 19'8" 6.00 m / 19'8"
Lengthinworkingposition 2.10 m / 6’11" 2.10 m / 6’11"
Transportwidth 2.40 m / 7’10" 2.40 m / 7’10"
Heightintransportposition (when machine isrestingontheground) 2.95 m / 9’8" 2.95 m / 9’8"
Powerrequirement(atthePTO) 20 kW / 27 hp 20 kW / 27 hp
Weightwith PTOshaft 690 kg / 1518 lbs 740 kg / 1628 lbs
Tyres 15 x 6.00 - 6 15 x 6.00 - 6
Tyrepressure 2 bars / 29 psi 2 bars / 29 psi
Hydraulicoutletsrequired 1 x double acting outlet
Electricconnectionrequired 1 x 7 pin plug
PTOspeed(rotationalfrequency) 540rpm(min-1)540rpm(min-1)
Particularity : The GF 5801 MHO is fitted with a hydraulic double acting cylinder and link rods which means
that the machine can automatically be placed in the oblique position without leaving the trac-
tor cab, for work on the edges of pastures, along hedgerows, fences, roads, lanes etc...
ASSEMBLY INSTRUCTIONS
To facilitate shipping of the GF 5801 MH / MHO, certains parts are removed to reduce size (photos 1 and 1A).
To improve security when delivering the machine, the stabilizer (S) is locked up by fixing bolt (H) (M 12 x 40)
and a self locking nut (M 12) (photo 2).
It is very important to remove this fixing bolt before using the machine.
1) Assembling the central wheels
a) GF 5801 MH (photo 3):
Fit the preassembled central wheel sets (P) onto the rotor axles (A) so that the handles are pointing backwards.
Each wheel set is numbered and must be matched to the rotor axle. Secure using a a flat washer (K) (dia.
30 x 50 x 1), a spacer (E) and a roll pin (J) (dia. 8 x 50).
b) GF 5801 MHO (photo 3 A):
Fitthepreassembledcentralwheelsets(P)ontotherotoraxlessothatthehandlesarepointingbackwards.Each
wheel set is numbered and must be matched to the rotor axle.
Secure using roll pins (U) (dia. 7 x 60 and 12 x 60).
TECHNICAL SPECIFICATIONS

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11A
3A3
2

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3) Fitting of the central guard and the wiring harness
The side beams (H) have been fitted in a forward position for shipment to reduce the dimension of the machine.
Thereforewhenassembling,theymustbe removedandfixedintheproperpositiononthecentralrotorhousings
with4hexagonalscrews(X)(M12x70)and4conicalspringwashers(D)(M12)(photo5).Donotforgettopress
the 8 plastic plugs (A) in their holes (photo 5).
Fit the front crossbar (F) and the front parking stand (G) to the 2 side beams (H) using 4 hexagon screws (I)
(M10x55),4flatwashers(dia.11x22x2)(onboltheadsside)ofand4self-lockingnuts(M10)(torque8daNm/
60ft.lbs)(photo 6).
Fit the rearcrossbar (O)and the rear parking stand (N) to the 2 sidebeams (H) using 4 hexagon screws (I)
(M10x55)and4self-lockingnuts(M10)(torque:5daNm/37ft.lbs).Donotforgettoinsert1supportpad(Q)between
the bolt heads and the crossbar (O) on the right side (photo 7).
Fit the rear left light (L) marked “L” on the rear left warning board (U) (photo 8). This rear left light is also
marked in white.
Fit the rear right light (R) marked “R” on the rear right warning board (V) (photo 9).
Thenattachthewiringharnesstotheguardframeusing8clampcollars(C)(length350mm)asshownonphotos
8and9.A clamp collar (C) ofthewiringharnessconnectoris also used to fitthePVCcord(K) of the rear parking
stand (N) (photos 7 and 8). Plug the harness connectors to the corresponding pilot and tail lamp terminals.
The connector terminals for the tail lights are marked "L" for left and "R" for right. The connector terminal for the
left tail light is also marked in white.The locking tab (1) of the female connector (2) must be fully engaged
over the peg (3) of the male connector (4) (fig. A).
Attach the front end of the wiring harness to the hydraulic hoses using 3 clamp collars (S) (length 176 mm)
(photo 6).
Stick the red reflectors (T) on the rear warning boards (U and V) (photos 8 and 9).
Insert the 4 plastic caps (P) in the front crossbar ends (F) (photo 6) and rear crossbar ends (O) (photo 8).
2) Fitting tines
Tines must be fitted on the tine arms in such a way that the longest finger is on the outside
and the pressure from the crop closes the spirals.
There are two types of tines :
a) Tinesfor rotorswhich turn to the left(counter clockwise) : the “KUHN”marking isfound on the longest finger
(see figure 4).
b) Tines for rotors which turn to the right (clockwise) : the “KUHN” marking is found on the shortest finger.
Attach tines (6) and their deflectors (11) to tine arms (7) with hexagon bolt (8) (M 14 x 50), plain washer (9)
(dia. 14,5 x 35 x 7) and a self locking nut (10) (M 14) as shown in figure 4.
Torque to 16 daNm / 120 ft.lbs.

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4
A
8
5
7
6
9

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ATTACHMENT
1. ATTACHMENT TO THE TRACTOR
The GF 5801 MH / MHO Gyrotedder can be fitted to all tractors equipped with a 3-point linkage.
The lower link pins have a diameter of 28 mm for tractors with Cat. 2 linkage.
With the machine parked and front and rear parking stands (A and C) lowered, attach the tractor lower link pins
(P) to the machine’s hitch brackets by sliding them from the outside towards the inside of the 3-point frame. Use
the 25 mm diameter link pins to attach tractor top link (Q) to the pendulum arm (D) (photo 10). When adapting
the machine to a tractor equipped with a Cat. 3 lift linkage, install bushes (dia. 37 mm) on the lower hitch pins
and a smaller bush (dia. 32 mm) on the top link pin.
Use rear parking stand (C) when parking the machine so that it does not tip over
when reattaching to the tractor.
The pendulum arm (D) has three attachment positions to suit varying tractor top link lengths. When working, the
roller of the pendulum arm (D) should move freely in its horizontal guide rail. If it does not, attach top link to the
uppermost hole of the pendulum arm.
Connect hydraulic hose (F) and plug (H) of the light and signal system (photo 11). To do this a double acting
hydraulic connection and a 7-pin electric socket at the rear of the tractor are required (photo 11).
Then lift up front and rear parking stands (A and C) and lock them into place.
Do not forget to raise the front and rear parking stands when the machine is
attached to the tractor.
Make sure that all pressure is released from the tractor hydraulic valves before
connecting hydraulic hoses (F) (photo 11).
2. PTO SHAFT
Connect the PTO shaft to the 540 rpm (min-1)tractor drive (with the safety clutch fitted on the machine side).
Make sure PTO length is correct :
1) When the PTO is in its maximum extended position, a minimum tube overlap of 300 mm (12") must be
maintained.
2) When the PTO is in its maximum overlap position (retracted), tubes should not butt against the yokes. As
a safety measure a clearance of at least 2 cm (0.8") must be maintained. If this is not the case, shorten the
two transmission tubes and the two guard tubes by the same length (fig. A and B). Bevel and clean the tubes
(fig. C) and grease the inside of the outer tube (fig. D).
3) Never operate the PTO at too great an angle (30° maximum)
Theserecommendationsandadjustmentsmustberespectedtoavoiddamageorpremature
wear of the PTO.
Never connect the PTO to the 750 or 1000 rpm (min-1)tractor drive.
To avoid accidents which could be serious, make sure that the guards are always correctly
in place and secured with the safety chains. On machine side attach the safety chain to the
eyeletlocatedunderthemainconnectingframe.Wornordamagedguardsmustbe replaced
immediately.

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11
10
AB
CD

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Before carrying out any operation such as maintenance or adjustment on the
machine, stop the tractor engine, remove ignition key and wait for the rotors to stop
before leaving the tractor.
Never engage the rotor drive while the outer rotors are folded up.
Keep all persons away from the vicinity of the machine before pivoting the outer
rotors in work position.
On GF5801MHO the rotors cannot be folded in transport position unless the central wheels
are raised off the ground. A built-in selector valve allows oil to be directed to the rotor fold
cylinders when the pendulum arm is positioned as shown in photo 16A, page 21.
WORKING POSITION AND ADJUSTMENTS
1) Working position
a) GF 5801 MH :
- Using the tractor's 3-point lift lower the machine to the ground.
- Pressurize hydraulic cylinders (V) (photo 12) to close them.
- Pull control cord (C) to release locks (R) and thereby free the outside rotors (photo 12).
- Lower the outside rotors by putting the hydraulic cylinders under pressure to extend them completely.
b) GF 5801 MHO :
- Using the tractor's hydraulic lift lower the machine making sure that the middle wheels do not touch the
ground.
- Pressurize the hydraulic cylinders so that the outside wings close up against their stops.
- Pull control cord (C) to free the outside rotors by releasing locks (photo 12A).
- Lower the outside wings by pressurizing cylinders so that they open completely up.
- Release pendulum arm (B) by lowering the machine to the ground (photo 12A).
When tedding (photo 13), the tractor 3-point linkage should always be in the free floating position and
the tractor valve which controls the oblique position setting must be in neutral.
2) Adjustment of rotor angle (photo 14)
The rotor angle is adjustable in 2 differents positions.
- Note : Levers 3 and 4 are to be operated at the same time.
- Raise machine slightly.
- Turn the release lever (3) and put it back in its original position after having raised or lowered the control lever
(4). (See arrows, photo 14).
- Position 1 : maximum rotor angle, should be used for first cut (normal or particularly dense crops).
- Position 2 : minimum rotor angle, should be used for second or third cuts (medium density and light crops).
Fine tune the rotor angle using the tractor top link so that the tines lightly skim the ground at the front (looking
in the direction of travel).

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12A
12
14
13

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4) Operating speed
.Many factors govern the choice of the correct forward speed :
a) Moisture content (this factor is most important the first time over).
b) Density of the crop.
c) Height and type of crop.
.Here are a few examples of correct speed given a crop of average length and density :
- First time over : when the crop has a high moisture content, the speed is approximately 7 - 8 km/h (4.5 -
5 mph).
- Second time over : the speed can reach 10 - 12 km/h (6.5 - 7 mph) according to the moisture content.
- The dryer the hay, the more the tractor engine speed (rotational frequency) should be reduced. When the
crop is very long, heavy and wet, the forward speed should be reduced.
.In general, whenever the GF 5801 MH / MHO is working in difficult conditions, it is adviseable to select
a lower gear. It is impossible to give accurate information on speeds which must be decided according to the
crop being treated.
- Raise the machine off the ground when turning sharply and when reversing.
- If in the working position the tractor does not lift the machine high enough to clear the outside rotors from
the ground, it is possible to lift the rotors slightly using the tractor hydraulics.
3) Working in the oblique position
The oblique position can be used when working along edges of fields, hedgerows, fences, etc.
a) GF 5801 MH (photo 15):
- Slightly raise the machine off the ground.
- Turn release lever (5) and put it back in its original position after having moved control lever (4) to the left or
to the right. (See arrows, photo 15).
- Position 6 : projecting crop towards the left.
- Position 7 : hole selected for normal operation.
- Position 8 : projecting crop towards the right.
b) GF 5801 MHO (photo 15A):
So that the GF 5801 MHO is automatically placed in the oblique position, activate the tractor hydraulics so that
the wheels are pointing towards the left (tedding to the left) or towards the right (tedding to the right).
For normal work the wheels (R) must be parallel to the side beams(L)(machine atrightangletothetractor)
(photo 15A).