KUHN GA8121 Operator's Manual
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KUHN GA8121 Operator's Manual

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

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  • Page 1 OPERATOR'S MANUAL KN202BGB F Gyrorake Original instructions KN202BGB F - English - 09-2014...

  • Page 3: Dear Owner

    (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.

  • Page 4: Table Of Contents

    Gyrorake GA8121 $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...
  • Page 5 Gyrorake GA8121  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.......................

  • Page 6: Identification Of The Machine

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

  • Page 7: Model Identification Plate

    Gyrorake GA8121 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. GA8121 Type: KUHN S.A. 67700 SAVERNE - FRANCE Serial no.: TYPE N°...

  • Page 8: Optional Equipment

    Gyrorake GA8121 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).

  • Page 9: Safety

    Gyrorake GA8121 $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.

  • Page 10: Safety Instructions

    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...
  • Page 11 Gyrorake GA8121  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.).
  • Page 12 Gyrorake GA8121  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.
  • Page 13 Gyrorake GA8121 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.
  • Page 14 Gyrorake GA8121  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.
  • Page 15 Gyrorake GA8121  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.
  • Page 16 Gyrorake GA8121 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.
  • Page 17 Gyrorake GA8121  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 tyre pressure. Respect manufacturers' recommendations pressure. Assembly, disassembly and repair of wheels and tyres must only be carried out by competent persons who are equipped with standardized tools.
  • Page 18 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 KN202BGB F...
  • Page 19 Gyrorake GA8121  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.

  • Page 20: Location And Description Of Safety Decals On The Machine

    Gyrorake GA8121 3. Location and description of safety decals on the machine  Location of safety decals Safety KN202BGB F...
  • Page 21 Gyrorake GA8121  Description of safety decals Operating instructions (1) The operators' manual contains all the information necessary for using the machine safely. It is imperative to read and comply with all instructions. Working on the machine (2) Before leaving...
  • Page 22 Gyrorake GA8121 Rotary tools (4) To prevent entanglement keep a safe distance from the machine. Body crushing (5) Stay a safe distance from the machine. Crushing hazard. Safety KN202BGB F...

  • Page 23: Road Safety Equipment And Recommendations

    4. Road safety equipment and recommendations The road safety equipment is mounted in the factory or by your authorized Kuhn dealer according to current safety regulations. - Always keep to the legal speed limit for driving a tractor-machine assembly on public roads.
  • Page 24 Gyrorake GA8121 The side device is made up of the following components: • 3 self-adhesive reflectors (1) per machine side.  Tyre pressure • Transport wheels (1): 3.0 bar (43 psi). • Rotor wheels (2): 2.0 bar (29 psi). Safety...
  • Page 25 Gyrorake GA8121  Instructions specific to France Coupling device (1) - Couple the machine to a tractor that is equipped with a system for locking the lift arms laterally and vertically. - To drive on roads, respect the attachment height specified in the operator's manual and lock the lift linkage.

  • Page 26: Machine Specifications

    Gyrorake GA8121 $Machine specifications 1. Description and glossary Parking stand Rotor arm Rotor arm folding cylinder Transport lock Front drag link Storage racks Drag link of steering arm Transport wheel Headstock 10 : Tine guard 11 : Main frame 12 :...
  • Page 27 Gyrorake GA8121 Tine Tine arms Rotor height adjustment crank Stub axle Guard lock Oscillating shaft housing Outer guard Tine arm support Rotor KN202BGB F Machine specifications...

  • Page 28: Technical Specifications

    Gyrorake GA8121 2. Technical specifications Attachment type 2 point, Category 2 Number of rotors Number of arms per rotor Working width (DIN11220) from 7.40 to 8.00 m (24’3’’ - 26’3’’) (approximately) Swath width from 1.40 to 2.00 m (4’7’’ - 6’6’’) (approximately) Width in working position from 7.50 to 8.10 m (24’7’’...

  • Page 29: Compulsory Equipment

    Gyrorake GA8121 3. Compulsory equipment  Primary PTO shaft The machines are factory fitted with one of the following PTO shafts: 1 3/8’’ - 6 spline pto shaft. 1 3/8’’ - 6 spline pto shaft (With free wheel clutch). 32x38 - 8 spline pto shaft (With free wheel clutch + Cam type cut-out clutch).

  • Page 30: Sound Levels

    Gyrorake GA8121  Axles Machines can be factory fitted with one of the following axles: Bogie axle suspension - Use this equipment in the following cases: • Adaptation of the rotors to slightly uneven ground contours. • High forward speed on bumpy grounds.

  • Page 31: Putting Into Service

    Gyrorake GA8121 $Putting into service 1. Description of control elements The machine is fitted with the following component: • 1 rotor arm release cord, accessible from the tractor cab. 2. Coupling and uncoupling  Description of coupling elements • A PTO shaft 1 3/8’’ - 6 splines.
  • Page 32 Gyrorake GA8121  Preparing the tractor Check that the tractor's authorized gross weight as well as its lift capacity and maximum weight per axle are not exceeded: See section: - Safety Safety instructions Precautions when driving on public roads. The machine adapts to tractors fitted with a 3 point linkage category 2.
  • Page 33 Gyrorake GA8121 Hitch pin parallelism - Adjust tractor lift rods so that hitch pins are parallel to the ground. Lateral adjustment of the lower links - Distribute the play on each side of the lift linkage. - Check that stabilisers...
  • Page 34 Gyrorake GA8121  Coupling the machine - Lower the tractor three-point linkage. - Place the lower links as close as possible under the hitch pins. - Attach lower links to the hitch pins on the inside of the yokes. - Check that lynch pins are in place and locked.
  • Page 35 Gyrorake GA8121  Primary PTO shaft Before using the machine for the first time: - Grease the transmission. Check overlap of the u-joint drive shaft and adjust length if necessary to avoid any premature wear. The direction of rotation is shown on a decal.
  • Page 36 Gyrorake GA8121 When the PTO shaft is in its maximum overlap position (retracted), tubes should not butt against the yokes. As a safety measure, a clearance (L) of at least 50 mm (2’’) must be maintained. If this is not the case: - Mark length (H) to cut when the transmission is the maximum overlap position.
  • Page 37 Gyrorake GA8121 Never operate the PTO shaft at an angle X exceeding 30°. To avoid serious accidents, the PTO drive shaft guards must be properly in place and fixed with the chains provided. - Attach PTO shaft guard chain in hole (1) on machine side.
  • Page 38 Gyrorake GA8121  Hydraulic connection - Connect hydraulic hose (1) of work/transport position setting cylinder to a tractor single acting valve.  Electrical connection - Connect 7-pin plug to the tractor. Putting into service KN202BGB F...
  • Page 39 Gyrorake GA8121  Adjusting the machine Frame height and check chains - Raise tractor lift linkage to obtain a distance H slightly over 600 mm (2’) between hitch pin axis and the ground. - Attach check chains supplied with the machine to the upper free hole of the tractor's top link attachment clevis.
  • Page 40 Gyrorake GA8121  Uncoupling the machine Park the machine on an even fairly level ground. Preferably park the machine in transport position. - Block machine with wheel chocks (1). - Unlock (1) and lower parking stand using handle (2). - Secure parking stand using lock (1).
  • Page 41 Gyrorake GA8121 - Lower the tractor three-point linkage to rest the machine on the ground. - Uncouple and place PTO shaft in support (1). - Disconnect and store hydraulic hose in holder (2). - Disconnect and store signalling plug on holder (3).

  • Page 42: Instructions For Transport

    Gyrorake GA8121 $Instructions for transport Before placing the machine into transport position: - Wait until the rotating parts have come to a complete stop. - Check that nobody is within the machine pivoting area. - If there is someone, make sure the person moves away.
  • Page 43 Gyrorake GA8121 - Remove the 3 consecutive outer tine arms on each rotor: • Unlock and remove tube clip (2). • Remove tine arm (1). - Store tine arms in racks fitted on the main frame. - Insert and lock tine arm tube clip (1).
  • Page 44 Gyrorake GA8121 - Place 3 tine guards per rotor on 3 consecutive tine arms of the rotor lower part: • Clips on the tine prongs (1). The machine is in transport position. Never engage the tractor PTO drive when the machine is in transport position.

  • Page 45: Conformity With The Road Regulations

    Gyrorake GA8121 2. Conformity with the road regulations Before driving the machine on public roads, ensure that the machine complies with current highway code regulations. - Check that the light boards are clean and that the lighting equipment functions before transporting the machine on public roads.

  • Page 46: Instructions For Work

    Gyrorake GA8121 $Instructions for work Before placing the machine in working position: - Check that nobody is within the machine pivoting area. - If there is someone, make sure the person moves away. 1. Putting the machine into work position...
  • Page 47 Gyrorake GA8121 - Activate tractor single acting valve that pressurizes the rotor arm lift cylinders to release the transport locks. - Pull release cord. - Shift the tractor's hydraulic valve in float position. - Release rotor arm release cord when rotor arms have passed the stop: •...

  • Page 48: Adjustments In Working Position

    Gyrorake GA8121 2. Adjustments in working position Before making any adjustment: - Check that nobody is within the machine pivoting area. - If there is someone, make sure the person moves away.  Working width The working width (L1) is comprised between: •...
  • Page 49 Gyrorake GA8121  Rotor adjustment Rotor working height From the working position: A too low rotor height causes: • An excessive tine wear. • Crop being contaminated by soil. • Delay in regrowth. • An unnecessary power consumption. - Remove R-clip (1).
  • Page 50 Gyrorake GA8121 Crosswise horizontality with "3D" axle: - Remove screws (1), nuts (2) and washers (3). - Position wheel stub axles (4) in the required position. - Install the 3 screws (1), nuts (2) and washers (3): • Torque: 8.5 daN m (63 lbf ft).
  • Page 51 Gyrorake GA8121 Pitch angle adjustment with "3D" axle: For machines with serial number as from B0237. - Unscrew the 3 nuts (1). - Loosen the check nut (2). - Adjust the pitch angle: • Loosen screw (3) to increase the pitch.
  • Page 52 GA8121  Steering system adjustment The steering system is mounted and adjusted either at the factory or by your Kuhn dealer. No adjustment is required. Should the transport wheels hit an obstacle, check that the steering system is not damaged.

  • Page 53: Machine Use

    Gyrorake GA8121 3. Machine use Before working: - Fold rotor guards. - Keep all persons and animals away from the machine danger zone. The machine is designed to form a central windrow adjustable in width. - Place the machine in working position.
  • Page 54 Gyrorake GA8121  Raking with only one rotor The machine can be used with only one rotor for forming a windrow to the right or to the left. When optional equipment is used, follow specific procedures mentioned in the related section: •...
  • Page 55 Gyrorake GA8121  Putting the machine in headland turn position The machine is placed from working position into headland turn position by means of the rotor arm lift cylinders controled as from a tractor's hydraulic outlet. - Use the headland turn position when crossing over an already formed windrow.
  • Page 56 Gyrorake GA8121 - Loosen the 2 screws (1) holding the cam (2). - Pivot cam (2) according to the required setting: (a): Minimum clearance height. (b): Maximum clearance height. - Tighten the 2 bolts (1).  Synchronization of the rotor arm raising - Loosen the 2 screws (1) holding the cam (2).

  • Page 57: Optional Equipment

    Gyrorake GA8121 $Optional equipment 1. 1 3/8’’ - 6 spline pto shaft Part no. 4600234 A specific pto shaft is available as option for tractors equipped with a 1 3/8’’ - 6 spline pto stub. 2. 1 3/8’’ - 6 spline pto shaft (With free wheel clutch) Part no.

  • Page 58: Flow Divider

    Gyrorake GA8121 4. Flow divider Kit no. 1147320 This equipment allows folding simultaneously the 2 rotor arms of the machine.  Putting the machine into transport position Position a: Function activated. Position b: Function deactivated.  Machine use Raking with only one rotor From transport position: Position a: Function activated.

  • Page 59: Swath Curtain

    Gyrorake GA8121 5. Swath curtain Kit no. 1146940 The windrow curtain facilitates windrow formation in crop of low density.  Adjustment - Remove lynch pin (1). - Rotate handle (2) to lower or raise the windrom curtain (3). - Insert and lock lynch pin (1).

  • Page 60: Bogie Axle Suspension

    Gyrorake GA8121 6. Bogie axle suspension Kit no. 1146900 - Use this equipment in the following cases: • Adaptation of the rotors to slightly uneven ground contours. • High forward speed on bumpy grounds. 7. 3D axle suspension Kit no. 1146910 - Use this equipment in the following cases: •...

  • Page 61: Bogie Axles

    Gyrorake GA8121 9. Bogie axles Kit no. 1147020 The bogie axles improve the machine's floatation when working on irregular grounds.  Rotor working height - Remove screws (1), nuts (2) and washers (3). - Position wheel stub axles (4) in the required position.

  • Page 62: Superballoon Spare Wheel

    Gyrorake GA8121 10. SUPERBALLOON spare wheel Kit no. 1126330 Dimensions: 16 x 6.5 - 8 (6PLY). Tire pressure: 2 bar (29 psi). 11. 7 pin plug (Only for North America) Part no. 58847400 This equipment allows electrically connecting the road signalling equipment.

  • Page 63: Clearance Lights

    Gyrorake GA8121 13. Clearance lights Kit no. 1016510 To conform with regulations in force in the country, clearance lights can be fitted on the machine. 14. SMV sign Kit no. 1016530 To conform with the regulation in force in the country, a warning sign can be fitted on the machine.

  • Page 64: Maintenance And Storage

    Gyrorake GA8121 $Maintenance and storage 1. Frequency chart Maintenance intervals are indicated for normal conditions of use. After the Every 50 Every 200 first 10 hours hours hours of use Lubrication Grease: - The headstock pivot point. - The articulation of the transport wheels.

  • Page 65: Cleaning The Machine

    Gyrorake GA8121 2. Cleaning the machine - Remove any foreign objects wrapped around: • The rotors. • The rotor undercarriages. 3. Lubrication Before carrying out any maintenance or repairs on the machine, switch off the tractor engine, remove ignition key, wait until all moving parts have come to a standstill and apply park brake.
  • Page 66 Gyrorake GA8121  Primary PTO shaft Before using the machine for the first time: - Grease the transmission. Grease the constant velocity joint when the shaft is straight. - Every 8 hours: • universal joints (1). • constant velocity joint (4).
  • Page 67 Gyrorake GA8121  Grease Lubricate with multi-purpose grease grade NLGI 2. • The headstock pivot point. • The articulation of the transport wheels. • The connecting rods. KN202BGB F Maintenance and storage...
  • Page 68 Gyrorake GA8121 • The rotor arm hydraulic cylinder pins. • 3D articulations (Upper part). • 3D articulations (Lower part). Maintenance and storage KN202BGB F...
  • Page 69 Gyrorake GA8121 • The oscillating shaft housings (24 greasers). • Rotor gears. Grease them by applying maximum 5 to 6 pumps of a grease gun. Rotate rotor once by hand before placing the machine in transport position. KN202BGB F Maintenance and storage...
  • Page 70 Gyrorake GA8121 • The undercarriages . • Swinging arms (with bogie axle). • The articulation of the frame outer arms. • The transport locks. Maintenance and storage KN202BGB F...
  • Page 71 Gyrorake GA8121 • The rotor arms. - Clean and pack the connections between rotor arms and removable tine arms with never-seize grease. KN202BGB F Maintenance and storage...
  • Page 72 Gyrorake GA8121  Lubricate with all purpose oil S 6994 EP90. • The steering system pivot points. • The guard locks. Maintenance and storage KN202BGB F...

  • Page 73: Maintenance

    Gyrorake GA8121 4. Maintenance  Check angle gearbox oil level The main gearbox is lubricated for life with 0.50 L (0.13 US gal) of extreme-pressure gear oil with viscosity grade SAE 80W90 and API grade GL5. From the working position: - Remove plug (1).
  • Page 74 Gyrorake GA8121  Checking the fixing elements - Check tightness of main frame undercarriage fixing elements (1): • Torque: 25 daN m (185 lbf ft). - Check transport wheel nuts (2) for tightness: • Torque: 27 daN m (200 lbf ft).
  • Page 75 Gyrorake GA8121  Replacing an oscillating shaft Park the machine on an even fairly level ground. - Loosen nut (1). - Remove pins (2). - remove tine arm and its holder (3). Remove one or several tine arms for easier access.
  • Page 76 Gyrorake GA8121 - Remove roll pins (1). - Remove crank (2). - Remove housing (3) and washers (4). - Clean and check all components before reinstalling them on a new oscillating shaft. Replace damaged components if necessary. - Fit housing (3) and washers (4).
  • Page 77 Gyrorake GA8121 - Reinstall the 4 bolts (1), nuts (2) and washers (3): • Torque: 9.5 daN m (70 lbf ft). - Rotate rotor by hand to check that all parts are in proper position. - Install tine arm support (3) on oscillating shaft (4).
  • Page 78 Gyrorake GA8121  Rotor arm wedging When the play between the rotor arm and the sheath is too import, additional wedges may be inserted. Additional wedges supplied with the machine. - Unscrew the 4 bolts (1). - Insert spacers (2): •...

  • Page 79: Storage

    Gyrorake GA8121 5. Storage  At the end of each season Avoid high pressure water jets on rotor and pivot points. - Clean the machine thoroughly. - Put the machine under cover in a dry place. - Check that all nuts and bolts are sufficiently tightened.

  • Page 80: Limited Warranty

    KUHN equipment 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 is covered under this Limited Warranty providing the machine is used and serviced in accordance with the recommendations in the Operator's manual.
  • Page 81 - The warranty claim is completed on line via extranet - www.kuhn.com or submitted on a KUHN warranty claim form and returned to the Company within one month after the date of failure or the date of problem becoming apparent.
  • Page 82 $Specimen of the "Declaration of conformity" EC Declaration of conformity (European directive 2006/42/CE) The manufacturer: Manufacturer name and address declares that the product described hereafter: Brand Brand Machine Machine Type / Model : Type / Model Serial no. Serial no. - conforms to the requirements of the European directive 2006/42/CE.
  • Page 84 KUHN-AUDUREAU S.A. - B.P. 19 - F - 85260 LA COPECHAGNIERE (FRANCE) Société Anonyme au Capital de 2 530 000 Euros KUHN-BLANCHARD SAS - 24, route de Nantes - F - 44680 CHEMERE (FRANCE) Société par Action Simplifiée au Capital de 2 000 000 Euros KUHN-HUARD S.A.

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