ASSEMBLY / OPERATOR'S MANUAL
GF 6401 T GYROTEDDER
N° 95215 D.GB - 04.2002
DEAR OWNER,
In buying a KUHN machine you have chosen wisely. Into it have gone years of thought,
research and improvements. 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 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. The performance you get from this machine is largely dependant upon how well you
read and understand this manual and apply this knowledge. Please DO NOT ASSUME THAT
YOU KNOW HOW TO OPERATE AND MAINTAIN YOUR MACHINE before reading this
manual carefully. KEEP THIS MANUAL AVAILABLE FOR REFERENCE.
Your KUHN dealer will instruct you on the general operation of your machine. He is interested
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.
For this reason please complete the model identification plate diagram below with the required
information. This will provide you with an easy reference for future service parts orders.
ABOUT IMPROVEMENTS
KUHN is continually striving to improve its products and, 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.
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CONTENTS
Safety 2
Safety decals 8
Technical specifications 10
Assembly instructions 10
Attachment : - to the tractor 22
- PTO shaft 24
Working position and adjustments 26
Transport position 30
Parking the machine 32
Lubrication 34
Optional equipment 36
Electrical connector (for North America) 38
Conditions of limited warranty 39
Copyright 2002 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 6401 T Gyrotedder must only be used for the work for which it has been designed : spreading and turning
pre-mowed fodder and straw. When fitted with a reduction gearbox, the GF 6401 T can also 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.
The GF 6401 T Gyrotedder must only be operated, maintained and repaired by competent persons who 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. Use a tractor equipped with a safety cab. Keep windows and roof hatch closed for reduced sound level while
operating the PTO drive implement.
6. Before starting up the machine and beginning work, check the surrounding area (beware of children!). 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. Before any adjustments, maintenance or repairs are carried out, ensure that the machine cannot 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. Before operating the machine, check the tightness of all nuts and bolts, particularly on rotating parts (blades,
tines, knives, spades ...)
5. Before operating the machine, ensure that all safety guards are firmly in place and in good condition. If worn
or damaged, replace immediately.
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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.
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 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. Do not stand between the tractor and the machine when operating the outer control lever of the lift mechanism.
5. In transport, the machine lift mechanism should be stabilized by tractor tie rods to avoid floatation and side
shifting.
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 or removing the PTO shaft, disengage PTO shaft, turn off engine and remove ignition 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 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 can continue turning momentarily after PTO is disengaged. 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.
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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. Before any adjustments, maintenance or repairs are carried out, lower the machine, depressurize the circuit,
turn off the engine and remove ignition key.
TIRES
1. Before any adjustments, maintenance or repairs are carried out, ensure that the machine rests on the ground
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.
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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.
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. Check safety guards regularly, particularly those that are subject to wear. Replace immediately if damaged.
8. Spare parts used must be in accordance with specifications and standards as defined by 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
1. 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 maneveuring.
2. Never tow the machine at speeds higher than 25 km/h (15 mph).
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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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8
6
4
5
3
9
7
2
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ASSEMBLY INSTRUCTIONS
A - MACHINES SHIPPED IN CRATES
To facilitate shipping, the GF 6401 T is packed in a wooden crate with some disassembled parts.
Also, on certain machines, the roll pins (L) (photo A) have not been driven in so that the side wings can be folded
even further towards the inside, thus reducing the shipping width of these machines.
Before using the machine, make sure that the roll pins (L) are driven in the housings so that
they protrude by approximately 10 mm on each side of the housing (distance X in photo A).
TECHNICAL SPECIFICATIONS
Attachment pivoting hitch
Number of rotors/tine arms per rotor 6 / 6
Working width (DIN 11220) 6.40 m / 21'
Width in working position 6.75 m / 22'1"
Length in working position 3.90 m / 12'9"
Transport width 2.95 m / 9’8"
Length in transport position 3.70 m / 12'2"
Height in transport position (when machine is resting on the ground) 3.45 m / 11'4"
Power requirement (at the PTO) 22 kW / 30 hp
Weight with PTO shaft 1100 kg/2420 lbs
Tyres : Lateral rotors 15 x 6.00 - 6 / Pressure 2 bars - 29 psi
Central rotors 220 / 50 - 6 / Pressure 2.5 bars - 36 psi
Transport frame 145 x 13 / Pressure 3 bars - 43 psi
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ASSEMBLY INSTRUCTIONS
1. Assembling the cylinder pins on the rear undercarriage (photo 1)
Disengage the locking pin (L) from the intermediate housings (N) (photo 27, page 33) and insert it into the storage
housings (R) (photo 26, page 33).
Pivot the rear undercarriage (G) down towards the rear. Next, join the hydraulic cylinders (9) to the rear undercarriage
(G) using 2 pins (10), 2 roll pins (11) (diameter 8 x 40) and 2 self-locking screws (M10 x 20).
2. Fitting tines and tine arms
Assemble and secure tine arms as shown in figure 2.
1 = self-locking screw M 12 x 30
2 = self-locking nut M 12
Tighten to a torque of 12 daNm (88 ft.lbs)
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) Tines for rotors which turn to the left (counter clockwise) : the “KUHN” marking is found on the longest finger (see
figure 3).
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 3.
Torque to 16 daNm / 120 ft.lbs.
3. Assembling the wheels (photo 4)
Fit the preassembled wheel sets (P) onto the rotor axles (A) so that the handles are pointing rearwards. Each wheel
set is numbered and must be matched to the rotor axle in such a way that the handles are directed towards the rear.
Secure using roll pins (J) (dia. 8 x 50). Do not forget to install flat washers (K) (35 x 50 x 1) and spacers (E) between
supports (L) and roll pins (J).
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2
4
3
1
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ASSEMBLY INSTRUCTIONS
4. Assembling the transport wheel deflectors (photo 5)
Fit the two preassembled deflectors (U) onto the axle (V) using 4 self-locking bolts (Z) (M 10 x 25) and 4 self-locking
nuts (M 10).
Fit the 2 triangulation bars (Y) to the axle holder and to the deflector (U) using 4 self-locking nuts (Z) (M 10 x 25)
and 4 self-locking bolts (M 10).
5. Fitting the safety guards (photos 6 and 7)
Fit the side beams (H) onto the central rotor housings using 4 hexagon screws (C) (M12 x 90) and 4 conical spring
washers (D) (M12).
Fit the front crossbar (F) to the 2 side beams (H) using 4 hexagon screws (M) (M 12 x 60) and 4 self-locking nuts
(M 12) (torque 8 daNm/60 ft.lbs). Insert 2 support pads (N) between the bolt heads and the crossbars (photo 6).
Fix the rear crossbar (O) onto the rear undercarriage (G) using pin (I) and 2 roll pins (J) (diameter 6 x 30) and onto
the link (L) using hexagon screw (K) (M12 x 40), self locking nut (M12) and 2 conical spring washers (M12) (photo
7). Ensure that the hexagon screw is not tightened completely (K).
6. Fitting the signalling and lighting elements (photos 8, 9,10 and 10' and figure A)
When fitting the signalling elements make sure that the white and red stripes are pointing in the right direction (the
red corners should be located at the top, pointing outwards).
At the same time, fit the 2 rear signalling panels (1) and the reflector support plates (2) onto the rear crossbar (O)
using 6 hexagon screws (4) (M10 x 45), 4 hexagon screws (5) (M 10 x 20) and 10 self locking nuts (M 10) (photo
9).The largest support plate (2) is to be fitted on the left side (photo 9).
Fix the front right signalling panel (6) on the front crossbar (F) using 2 hexagon screws (4) (M 10 x 45), 2 hexagon
screws (5) (M10 x 20) and 4 self locking nuts (M 10) (photo 10).
Fix the front left signalling panel (6') at the same time as the spare wheel (7) onto the front crossbar (F) using
2 hexagon screws (8) (M 10 x 55), 1 hexagon screw (4) (M10 x 45), 1 hexagon screw (5) (M10 x 20) and 4 self
locking nuts (M10) (photo 10').
Stick the white reflectors (U) on the front signalling panels (6 and 6') as shown in photos 10 and 10'.
Fit the white lights (Q) (slit E pointing downwards) on the front warning boards (photos 10 and 10').
Fit the rear left light (R ) marked “L” on the rear left warning board (1) (photo 9). The rear left light connector
is also identified by a white cable sheath (highlighted in grey on figure A).
Fit the rear right light marked “R” on the rear right warning board.
Plug the harness connectors to the corresponding pilot and tail lamp terminals .The locking tab (12) of
the female connector (13) must be fully engaged over the peg (14) of the male connector (15) (fig. A).
Fix the electric cables on the crossbar (F) and (O) using the clamp collars (T) as shown in photos 8, 10 and 10'.
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6
7
10
9
10'
A
8
5
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B) Machines shipped in ‘Container packing’
When unloading ‘container packed’ GF 6401 T, make sure the danger area is clear of
people.
To unload ‘container packed’ GF 6401 T a lifting device with a minimum lifting capacity of 2 tons needs to be used
(hoist, crane etc…).
Use two nylon straps (A) of length 2m (minimum capacity of each strap:1500 kg / 3300 lbs) and attach them to the
rotor axles, as shown in photo A.
Proceed as follows:
- Using the crane, unload the machine onto the ground, keep the straps taut, remove the wooden wedges (B and
C), tension hoops and maintaining wires taking the usual safety precautions (photo A).
- Put wedges (D) under the back wheels, then slightly lift the machine and put the wooden wedge (C) under the
support (E) (photo B).
- Fix a nylon strap (A) to the upper ring (F) of the headstock (G), lift the crane until strap (A) is tight (photo C).
- Take out the roll pins (diameter 5 x 50 and 8 x 50) then remove the pivoting axle (H) and lower the headstock (G)
to the ground (photo C).
- Remove the two mounting nuts and bolts (I) and detach the connecting frame (J) (photos D and E). Two people
are needed to assist in this operation (photo E).
- With the crane lift the machine and pivot it about its rear wheels (K) place a trestle (L) with a height of approx. 76
cm / 30” and capable of holding a minimum load of 1 ton under the support (E) (photo F).
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A
B
C
D
EF
- 18 -
- Remove the four mounting nuts and bolts (I) and detach the support (M) (photo G).
- Glide the connecting frame (J) in its housing on the chassis (N) (photo H) and secure it using the 6 original mounting
nuts and bolts (I) (photo I) making sure the six conical spring washers are in the correct position (convex side
against bolt head) (Torque to 22 daNm / 162 ft.Ibs). Simultaneously connect the drive shaft (O) to the central
gearbox input shaft and secure with the nut and bolt (P) (photo I).
- Install the stand (Q) with the axle (R) and 2 roll pins (S) (diameter 8 x 40) under the connecting frame (J), put a
wooden wedge (B) under the stand (photo J).
- Remove the trestle (L) (photo J) and the support (E) by unscrewing the mounting hardware (T) (photo K).
- Re-install the headstock (G) on the connecting frame (J) with the axle (H) and the roll pins (U) (diameter 5 x 50
and 8 x 50) (photo L).This manoeuvre is made easier using a strap (A) and the crane (photo L).
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G
H
I
J
KL
- 20 -
- Pass the flexible hoses (V) and the wiring harness (W) through the guide (X) and the connecting frame support
(Y) and through the upper ring (F). Secure the lot with the hose clamp (Z) and cable ties (A), as shown on photo
M.
- Fit the hydraulic bloc (B) and hoses underneath the main frame (N) using an hexagonal screw (M10x75) and a
serrated lock washer (M10) (photo N)
- Assemble left and right protection hoods (C) and mount them on connecting frame (J) using 11 self-locking screws
(D) (M10x16) (photo N). Make sure that the electrical harness (E) for the front signalling equipement is placed in
the V-shaped sheath welded on the left protection hood (C) and passed through the passing hole (H) (photo O).
- Pass the two cords (O) through plates (P) and tie a knot (photo P).
Pass the other end of the cords through the eyelet (Q), and slightly tighten the cords, add a plastic washer (R)
to each cord and tie a knot in front of the eyelet (Q) (photo P). Thread the loose ends of the cords through the handles
(S) , tie a knot at a suitable length in order to manoeuvre easily from the tractor seat, cut any excess cord at the
base of the knots (photo P).
Put the black cap (T) on the handle operating the machine folding/unfolding system and the red cap (U) on the
handle operating the unlocking of the rear undercarriage (photo P).
- To complete the job assemble the outer guards (V) onto the outer housings simultaneously using 4 hexagonal
bolts (W) (M12 X 60) and 4 conical spring washers (X) (dia.12) and onto the inner connecting tube flanges using
4 self locking screws (Y) (M12 X 30) (photo Q). Install the outer guards with the machine coupled to the
tractor (see page 22) and folded in working position (see page 26).
All assembly instructions relative to GF 6401 T shipped in crates, see pages 10 to 15, also apply
to the GF 6401 T shipped ‘container packed’.
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Q
OP
MN
- 22 -
ATTACHMENT
1. ATTACHMENT TO THE TRACTOR
The GF 6401 T Gyrotedder can be fitted to all tractors equipped with a 3-point linkage.
The lower link pins have a diameter of 22 and 28 mm for tractors with Cat. 1 and 2 linkages.
Attach the tractor lower link arms (A) to the inside of the 3-point frame for Cat. I linkages and to the outside for Cat.
2 linkages (photo 11).
Ensure that the tractor linkage is always stabilised to avoid sideways movement.
Check chain (C) is designed to maintain the pre-set pitch angle (see page 28). Attach it to the tractor yoke using
the hook (see photo 11) and to the machine using a spacer and a lynch pin (photo 19, page 29).
Connect hydraulic hoses (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 parking stand (B) (photo 11) and lock it into place.
Do not forget to raise the parking stand 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).
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11
- 24 -
ATTACHMENT
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 (photos A and B). Bevel and clean the tubes
(photo C) and grease the inside of the outer tube (photo D).
3) Never operate the PTO at too great an angle (30° maximum)
These recommendations and adjustments must be respected to avoid damage or
premature wear of the PTO.
Never connect the PTO to the 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 eyelet located under the main connecting frame (photo 11, page 23). Worn or damaged
guards must be replaced immediately.
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AB
C
D
- 26 -
WORKING POSITION AND ADJUSTMENTS
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.
1. Transport
With the transport wheels lowered ( photo 12), ensure that the locks (V - photo 13) and (4 - photo 16) are well engaged.
Raise the tractor 3-point lift so that the main frame is more or less horizontal (photo 12).
Raise the parking stand (B) (photo 12).
2. Folding machine into working position (photos 14 to 17)
The GF 6401 T is fitted with 2 manoeuvring cords (photo 14)
- the cord with the black handle (D1) controls the unfolding of the machine
- the cord with the red capped handle (D2) controls the raising and lowering of the transport wheels (locks V - photos
13 and 15).
a) Raising the transport wheels :
- lower the tractor 3-point lift until the check chain is tight
- pressurise the transport wheel cylinders so that they open up against their stops
- release locks (V) by pulling on the cord with the red capped handle (D2) (photo 14). Keep the cord taut
- raise the transport wheels by retracting the cylinders
- release the cord, locks (V) re-engage automatically when the transport wheels are raised (photo 15).
b) Unfolding the machine
- pressurise the hydraulic cylinders so that they close up against their stops (photo 16)
- release locks (4) (photo 16) on the outer rotors by pulling on the cord with the black handle (5) (photo 16)
- lower the outer rotors by extending the cylinders
- make sure that the hydraulic cylinders are completely extended
- now the machine is in the working position (transport wheels raised and outer rotors lowered) (photo 17).
For safety reasons never engage tractor PTO while outside wings are folded up.
Before placing the machine in the working position, move all persons away from the
pivoting area of the transport wheels and the outer rotors.
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12
16
17
13
14
15
- 28 -
WORKING POSITION AND ADJUSTMENTS
3. Adjustment of rotor angle (fig. 20)
- Note : Levers 6 and 7 are to be operated at the same time.
- Raise machine slightly by means of the rear transport frame.
- Turn the release lever (6) and put it back in its original position after having raised or lowered the control lever (7).
(See arrows, fig. 13).
- Position 9 : maximum rotor angle.
- Position 8 : minimum rotor angle.
Maximum working angle (position 9) should be used for first cut (normal or particularly dense crops). For second
and third cuts (medium density and light crops) the minimum working angle setting (position 8) should be used.
- Attach the check chain (C) using the chain hook (G) to one of the free holes on the 3-point frame (photo 19).
- Adjust the rotor angle using the tractor 3-point lift until the tines lightly skim the ground at the front. In this position
the check chain (C) should be taut (photo 19)
- In order to maintain this setting definitively, close the chain hook eyelet (G) using the roll pin (diameter 5 x 45
mm).
Maximum working angle (position 9) should be used for first cut (normal or particularly dense crops). For second
and third cuts (medium density and light crops) the minimum working angle setting (position 8) should be used.
4. Working in the oblique position (fig. 20 A)
- The oblique position can be used when working along edges of fields, hedgerows, fences, etc.
- Slightly raise the machine off the ground by means of the rear transport frame.
- Turn release lever (4) and put it back in its original position after having moved control lever (7) to the left or to the
right. (See arrows, fig. 20 A).
- Position 1 : projecting crop towards the left.
- Position 2 : hole selected for normal operation.
- Position 3 : projecting crop towards the right.
5. 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 6401 T 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.
- 29 -
20
20A
19
- 30 -
TRANSPORT POSITION
Transport position
a) Folding the machine
Before placing the machine in the transport position move all persons away from the
pivoting area of the rear transport wheels and the outer rotors.
- Disengage the tractor PTO.
Wait for the rotors to stop rotating.
- Pull control cord with the black capped handle (5) (photo 21)
- Activate the tractor hydraulics to lift the outer rotors until the locks (4) automatically engage into the transport
position.
b) Lowering the transport wheels
- Pressurise the hydraulic cylinders so that they close up against their stops
- Release locks (V - photo 22) by pulling on the cord with the red capped handle (D2) (see photo 14, page 27).
- Lower the transport wheels by extending the hydraulic cylinders.
- Release the cord. Locks (V) re-engage automatically when the rear transport wheels are lowered (photo 23).
- Raise the 3-point lift so that the main frame is more or less horizontal (photo 24).
- Check that plug of the light and signal system is properly connected (see photo 11, page 23) and ensure that all
signal lights are functioning correctly.
Never engage tractor PTO while the machine is in the transport position (photo 24).
In transport position never shift the tractor hydraulic distributor in floating position.
NOTE : The GF 6401 T is equipped with a spare wheel attached behind the front left warning board (photo 24).
The replacement of a punctured wheel necessitates use of a 24 mm spanner.
Never tow the machine at speeds higher than 25 km/h (15 mph).
- 31 -
21
24
22
23
- 32 -
PARKING THE MACHINE
- Once the machine is in the transport position, lower the parking stand (B) into the vertical position and lock it in
place with the handle (P) (photo 25),
- unhook the check chain and attach it onto the PTO shaft holder (S) (photo 25),
- lower the tractor 3-point lift until the machine is resting on the parking stand
- place light and signal plug (F) and male coupling of the hydraulic hoses (M) into their holders (photo 25),
- PTO shaft (T) should be positioned in its support (S) to avoid ground contact which could result in premature failure
due to contamination with dirt and dust (photo 25),
- detach the machine from the tractor.
Take extra care when attaching or detaching the machine . Do not disconnect/
connect the PTO schaft unless the PTO is disengaged, the tractor engine stopped
and the ignition key removed.
The GF 6401T must always be parked on a flat ground which is more or less horizontal.
furthermore, make sure that the wedges are placed under the transport wheels (photo 25).
If the machine is to be parked for a long time or if the GF 6401 T height needs to be reduced for storage (e.g. in winter),
the undercarriage can be locked in the intermediary position by proceeding as follows :
- once the transport wheels are locked in the transport position with pins (V), remove lynch pin (A) and disengage
the locking pin (L) from its housing (R) (photo 26),
- insert locking pin (L) into the intermediate housings (N) and lock it in this position with the lynch pin (A)
(photo 27),
- pressurise the hydraulic cylinders so that they open up against their stops,
- release the locks (V) (photo 26) by pulling on the cord with the red handle (D2) (see photo 14, page 27)
- retract the transport wheel cylinder. The machine lowers until it comes in contact with the locking pin (L)
(photo 27).
- 33 -
25
27
26
- 34 -
LUBRICATION AND MAINTENANCE
1. Lubrication (photos 28 to 32)
- The drive gearbox (7) is filled with SHELL ALVANIA WRO grease (capacity:0.650 kg).
- The recommended greasing intervals are based on normal field and work conditions. Severe or unusual conditions
may require more frequent lubrication.
8 h
. PTO yoke bearings and drive tubes (5) and (6)
.6 rotor gearboxes (8)
.6 rotors (11)
.Vertical axle on hitch frame (2)
.6 axles (9)
.6 finger couplings “DIGIDRIVE” (10)
.Undercarriage pin (4)
.6 wheel columns (13)
. 2 hydraulic cylinder articulations (1)
Oil every 50 hours
or at least once per year
.12 wheel position locks (12)
.The 2 locking pins on the undercarriage (3)
.All other pivoting points of the machine
50 h or
at least once per season
TO ENSURE TROUBLE FREE OPERATION OF YOUR MACHINE,
WE RECOMMEND SHELL LUBRICANTS.
Greasing intervals Grease fittings Lubricant
SHELL Multi-Purpose Grease NLGI grade 2
SHELL Oil
- 35 -
30
31
32
28
29
- 36 -
OPTIONAL EQUIPMENT
Duplex reduction gearbox (Kit no. 112 6130)
A “Duplex” reduction gearbox for the GF 6401 T can be supplied as an optional extra when using the machine for
raking night swaths. With this gearbox, the high rotor speed (rotational frequency) necessary for tedding is
maintained and there is also a lower rotor speed (rotational frequency) for raking night swaths.
The reduction gearbox can be attached to existing GF 6401 T's without modification.
To install the “DUPLEX” reduction gearbox proceed as follows :
- to start with, remove the right guard (D) (photo 36) and the original guard cone,
- next, remove the original drive shaft,
- fit the drive shaft (A) delivered with the kit so that the splines (190 mm in length) are pointing towards the front (photo
34),
- position the PVC spacer tube (F) on the U-iron (C), slide the Duplex reduction gearbox unit on the drive shaft (A)
and secure in place with 2 washers (I) (diameter 11 x 24 x 2) and 2 original self locking nuts (L) (M 10)
(tighten to 6 da N.m/45 ft.lbs),
- finally, put back the right guard (D) using the 7 original self locking bolts (O)
When tedding, the PTO shaft must be fitted directly to the splined end of drive shaft (A). When raking night swaths,
mount the PTO shaft on the “Duplex” reduction gearbox input shaft (phto 37). In this case the tractor PTO speed
(rotational frequency) should be maintained at 400 rpm (min-1) and ground speed between 5 - 7 km/h (3 - 4 mph).
Mount the PTO shaft cover (E) inside the guard (G) using wing nut (H) so that the PTO end not in use is fully guarded
(photo 37).
- 37 -
37
35
34
36
- 38 -
ELECTRICAL CONNECT OR (for North America)
KUHN wiring harnesses are supplied with an ISO (International Standards Organization) 1724 plug connector .If the
implement is to be operated with a tractor equipped with an SAE style seven-pin connector a SA J 560b plug must
be installed. If required, the SAE J 560b plug is factory supplied with the machine.
Implement wiring harness description
Colors Function Terminal connection
ISO 1724 plug SAE J 560b plug
White Ground 3 1
Black Left running lights 7 6 *
Yellow Left turn & hazard 1 3
Red Stop lights 6 4 **
Gr ee n Right turn & hazard 4 5
Brown Right running lights 5 6 *
BlueNot used 2 7
* Note that the black and brown wires must be connected together on SAE type connectors for proper light
opération.
** The red wire should only be attached to the #4 terminal if the #4 terminal on the tractor is confirmed to be a
brake light terminal. If the tractor has no brake terminal the red wire of the implement should be sealed off
and not connected to any terminal.
- 39 -
SOUND LEVELS
Sound levels given out by : GF 6401 T Gyrotedder
Sound levels have been measured in accordance with the measuring methods as defined in:
EN 1553
<< Agricultural machinery - Agricultural self-propelled, mounted, semi-mounted and trailed machi-
nes - Common safety requirements >>
A-weighted emission sound pressure level L (A) eq inside tractor cab (with closed windows) :
Tractor only : 73.2 dB (A)
Tractor + machine : 73.5 db (A)
LIMITED WARRANTY
KUHN S.A. of 4 Impasse des Fabriques, 67706 SAVERNE CEDEX, France (hereinafter called the
«Company») warrants, in accordance with the provisions below, to each original retail purchaser of
KUHN new equipment of its own manufacture, from an authorized KUHN dealer, that such equipment
is, at the time of delivery to such purchaser, free from defects in material and workmanship and that
such equipment will be warranted for a period of one year starting from the date the goods are delivered
to the end user and during this period up to a limit of 500 hours use, providing the machine is used and
serviced in accordance with the recommendations in the Operator’s Manual.
THESE CONDITIONS ARE SUBJECT TO THE FOLLOWING EXCEPTIONS :
1. Parts of machines which are not of our manufacture i.e. tyres, belts, P.T.O. shafts, clutches etc., are not
covered by this Limited Warranty but are subject to the warranty of the original manufacturer. Any claim
falling into this category will be taken up with the manufacturer concerned.
2. Warranty claims applying to these types of parts must be handled in the same way as if they were parts
manufactured by KUHN. However, compensation will be paid in accordance with the warranty agreement of the manufacturer concerned in as much as the latter justifies such a claim.
3. This Limited Warranty will be withdrawn if any equipment has been used for purposes other than for
which it was intended or if it has been misused, neglected or damaged by accident or let out on hire. Nor
can claims be accepted if parts other than those manufactured by us have been incorporated in any of
our equipment. Furthermore, the Company shall not be responsible for damage in transit or handling by
any common carrier and under no circumstances within or without the warranty period will the Company
be liable for damages for loss of use or damages resulting from delay or any consequential damage.
We cannot be held responsible for loss of earnings caused by a breakdown or for injuries either to the owner
or to a third party, nor can we be called upon to be responsible for labor charges, other than originally
agreed, incurred in the removal or replacements of components.
THE CUSTOMER WILL BE RESPONSIBLE FOR AND BEAR THE COSTS OF:
1. Normal maintenance such as greasing, maintenance of oil levels, minor adjustments, etc.
2. Transportation of any kind of any KUHN product to and from the place the warranty work is performed.
3. Dealer travel time to and from the machine or to deliver and return the machine from the workshop for
repair.
4. Dealer travelling costs.
Parts defined as normal wearing items are listed as follows and are not in any way covered under this
Limited Warranty :
V belts, discs, knives, wear plates, disc guards, tires, torque limiters, hydraulic hoses, pitman shafts, swath
sticks, blades, tines and tine holders.
KUHN Limited Warranty will not apply to any product which is altered or modified without the expressed
permission of the Company and/or repaired by anyone other than Authorized Service Distributors or
Authorized Service Dealers.
LIMITED WARRANTY IS DEPENDENT UPON THE STRICT OBSERVANCE BY THE
PURCHASER OF THE FOLLOWING PROVISIONS :
- That this Limited W arranty shall not be assigned or transferred to anyone unless the Company’s consent in
writing has first been obtained.
- The warranty/product registration form has been correctly completed by dealer and purchaser with their
names and addresses, dated, signed and returned to the appropriate address as given on the warranty/
product registration form.
- The claim form sent to KUHN has been correctly completed st ating:
* dealer’s name and address
* owner’s name and address
* type of machine
* machine serial number
* delivery date to buyer
* date of failure
* tractor make and type
* description of the failure and its cause
* quantity, reference number and name of the damaged p art s
* reference number, quantity and date of the invoice for the replacement parts.
- The judgement of the Company in all cases of claims under this Limited W arranty shall be final and conclu-
sive and the purchaser agrees to accept its decisions on all questions as to defect and to the exchange of
any part or parts.
- That all safety instructions in the Operator’s Manual shall be followed and all safety guards regularly inspected
and replaced where necessary .
No warranty is given on second-hand products and none is to be implied. Persons dealing in the Company’s
products are in no way legal agents of the Company and have no right or authority to assume any obligation
on their behalf, express implied, or to bind them in any way .
KUHN S.A. reserves the right to incorporate any change in design in its products without obligation to make
such changes on units previously manufactured.
Moreover, because of the constant progress in technology, no guarantee is given to the descriptions of
equipment published in any document by the company .
DISCLAIMER OF FURTHER W ARRANTY
There are no warranties, expressed or implied, except as set forth above. There is no
warranty of merchantability. There are no warranties which extend beyond the description
of the product contained herein. In no event shall the company be liable for indirect, special
or consequential damages (such as loss of anticipated profits) in connection with the retail
purchaser’s use of the product.
- N O T E S -
This machine complies with the safety requirements of the European machinery directive.
The Operator should respect all Health and Safety regulations as well as the Highway
Code. For your own safety, use only genuine KUHN spare parts. The manufacturer
disclaims all responsibilities due to incorrect use or non-compliance with the
recommendations given in this manual.
Printed in France by KUHN
KUHN S.A. 4 Impasse des Fabriques F - 67706 SAVERNE CEDEX (FRANCE)
Tél. : + 33 (0) 3 88 01 81 00 - Fax : + 33 (0) 3 88 01 81 03
www.kuhnsa.com - E-mail : info@kuhnsa.com
Société Anonyme au Capital de 19 488 000 Euros
For your safety
and to get the best from your machine,
use only genuine KUHN parts
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