KUHN GMD883 Operators Manual And Installation Manual
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KUHN GMD883 Operators Manual And Installation Manual

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OPERATOR'S MANUAL
Disc mower
KN017CGB D
- English - 03-2007

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Summary of Contents for KUHN GMD883

  • Page 1 OPERATOR'S MANUAL Disc mower KN017CGB D - English - 03-2007...

  • Page 3: Dear Owner

    Designated use of the machine The GMD883 disc mower must only be used for the purpose for which it was manufactured: mowing on the ground of hay fields, grass silage fields and improved pastures for the purpose of harvesting fodder for feeding livestock.

  • Page 4: Table Of Contents

    Disc mower GMD883 $CONTENTS Dear Owner........................1 Contents ......................... 2 Identification of the machine ..................4 Front view ............................4 Rear view ............................4 Model identification plate........................ 5 Optional equipment ......................... 5 Safety ..........................6 Description of symbols used in this document ................6 Safety instructions...........................
  • Page 5 Disc mower GMD883 Instructions for work....................46 Putting the machine into work position ..................46 Putting the machine in headland turn position ................50 Adjustments in working position ....................51 Machine use ........................... 57 Optional equipment......................60 Yokes .............................. 60 Large cone discs ........................... 60 Raised skid shoes .........................

  • Page 6: Identification Of The Machine

    Disc mower GMD883 $IDENTIFICATION OF THE MACHINE 1. Front view 2. Rear view Identification of the machine...

  • Page 7: Model Identification Plate

    Disc mower GMD883 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. GMD883 Type: 4. Optional equipment Tick box corresponding to the equipment fitted on your machine: Part no.

  • Page 8: Safety

    Disc mower GMD883 $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 9: 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 10 Disc mower GMD883 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-protectors, etc.). Make sure that all operating controls (ropes, cables, rods, etc) are placed so that they cannot be set off accidentally, risking accident or damage.
  • Page 11 Disc mower GMD883 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 transports of oversize equipment.

  • Page 12: Hydraulic Circuit

    Disc mower GMD883 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 13: Pto Shaft

    Disc mower GMD883 PTO shaft Use only PTO shafts supplied with the machine or recommended by the manufacturer. The protective shield of the tractor PTO stub, the PTO shaft guards and the protective covering of the machine input shaft must always be in place and in good condition.
  • Page 14 Disc mower GMD883 Precautions during manoeuvres When moving the machine from the transport position to the working position and vice versa, make sure that nobody is within the machine pivoting area. Remote controlled components Danger of crushing and shearing can exist when components are operated by hydraulic or pneumatic controls.

  • Page 15: Safety Decals

    Disc mower GMD883 Safety decals Safety warning decals to respect, are placed in pictorial form on various parts of the machine. They are there to warn you of potential dangers and to tell you how to avoid accidents. Always keep the safety decals clean and readable, and replace them when they are worn, damaged, missing or illegible.
  • Page 16 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. Projection of stones and foreign objects For driver safety, always use a tractor equipped with a cab.
  • Page 17 Disc mower GMD883 Even when the machine is used in accordance with its purpose, objects may be projected. Stones and other foreign objects projected by the moving parts can travel a considerable distance. Keep all persons and animals away from the danger zone.

  • Page 18: Location And Description Of Safety Decals On The Machine

    Disc mower GMD883 3. Location and description of safety decals on the machine Location of safety decals Safety...
  • Page 19 Disc mower GMD883 Description of safety decals Operating instructions (1) The operator's 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 20 Disc mower GMD883 Crushing area (5) Never operate in an area where there is a crushing risk before all moving parts have come to a complete stop. Rotating cutting tools (6) Keep away from the mower knives all the time the engine is running, the PTO drive engaged and the moving parts have not come to a complete stop.

  • Page 21: Road Safety Equipment And Recommendations

    Disc mower GMD883 Body crushing (9) Stay a safe distance from the machine. Crushing hazard. 4. Road safety equipment and recommendations The road safety equipment is mounted in the factory or by your authorized dealer according to current safety regulations.

  • Page 22: Machine Specifications

    Disc mower GMD883 $MACHINE SPECIFICATIONS 1. Description and glossary Side guards Left mowing unit Right mowing unit Lift cylinders Three-point hitch coupler Primary PTO shaft Secondary PTO shafts Mowing unit connecting frames Toolbox 10 : Signalling panel support 11 :...
  • Page 23 Disc mower GMD883 Main frame Three-point hitch coupler Lower hitch attachments Upper hitch attachment Gauges Hoses holder Mowing unit connecting frames Hydraulic valve bank Transport locks 10 : Transport stops 11 : Hydro-pneumatic accumulators 12 : Suspension circuit valves Machine specifications...
  • Page 24 Disc mower GMD883 Ground pressure adjustment cylinder Large cone disc Disc Lift cylinder Side guard Cutterbar Side gearbox Machine specifications...

  • Page 25: Technical Specifications

    Disc mower GMD883 2. Technical specifications Attachment type 3 point attachment category 2 and 3 Number of discs 2 X 8 Working width (with a front mounted machine) 8.73 m (23’7’’) Width in working position 9.35 m (30’8’’) Width in transport position 2.98 m (9’9’’)

  • Page 26: Putting Into Service

    Disc mower GMD883 $PUTTING INTO SERVICE 1. Description of control elements The machine is supplied with an 18 mm box wrench (1) to carry out certain adjustment and maintenance tasks. The tractor must be equipped with: - 1 double acting valve for use in combination with the control box.
  • Page 27 Disc mower GMD883 Positioning and parking The control box must be easily accessible from the tractor cab. Control box mounting - Fit support (1). - Fit the 4 screws (3) and washers (2) Fit control box using: - 1 screw diameter D1 (M12).
  • Page 28 Disc mower GMD883 Description of the controls ON/OFF push button (a). The warning light is on when the control box is energized. The direction of operation of different functions may be inverted depending upon the way the hydraulic hoses have been connected to the tractor outlet.
  • Page 29 Disc mower GMD883 Putting the machine from headland turn into transport position and vice versa: - Fold or unfold mowing units. Setting the machine into transport position is carried out with the machine in headland turn position. Putting into service...
  • Page 30 Disc mower GMD883 Reduced or increased ground pressure: Increase or reduce mowing unit ground pressure. Putting the mowing units in headland turn position: - Position switch in the following position: - Position (a) : Right mowing unit. - Position (b): Left and right mowing units.

  • Page 31: Coupling And Uncoupling

    Disc mower GMD883 Description of the connection Never connect battery charger or perform welding tasks without having previously disconnected the control box. The control box is connected to: - A tractor 3-pin socket. - A machine wiring harness connected to the hydraulic valve bank.
  • Page 32 Disc mower GMD883 Preparing the tractor Check that the tractor's authorized gross weight as well as its lift capacity and maximum weight per axle are not surpassed. The front axle load (1) must never, under any circumstances, be less than 20% of the tractor's unladen weight.
  • Page 33 Disc mower GMD883 Coupling the machine - Lower the tractor three-point linkage. - Place the lower links as close as possible under the hitch pins. - Attach the lower links to the hitch pins. • Category 2 (a) • Category 3 (b) - Secure each hitch pin with lynch pin.
  • Page 34 Disc mower GMD883 - Raise machine using the tractor lift linkage until parking stands no longer rest on the ground. - Unlock and remove lynch pin (1). - Remove pin (2). - Raise parking stand (3). - Insert pin in hole corresponding to transport position (4).

  • Page 35: Hydraulic Connections

    Disc mower GMD883 HYDRAULIC Connections The machine hydraulic suspension circuit is pressurized at the factory. - Connect hydraulic hoses (1) and (2) to: • 1 double acting hydraulic outlet. - Connect offset cylinder hydraulic hoses (3) and (4) to: • 1 double acting hydraulic outlet.

  • Page 36: Electrical Connections

    Disc mower GMD883 Electrical CONNECTIONS - Connect 7-pin plug to the tractor. - Connect control box to the 19-pin electric plug. Putting into service...
  • Page 37 Disc mower GMD883 Primary PTO shaft Make sure that the PTO shaft is correctly adjusted, to avoid premature wear and tear. The tractor PTO stub must rotate at a speed of 1000 min Separate the two half PTO shafts and connect them to the machine's input shaft and to the tractor PTO stub.
  • Page 38 Disc mower GMD883 To avoid serious accidents, the PTO drive shaft guards must be properly engaged in the catches. Check that the system is properly engaged. Secondary PTO shafts Before adjusting, maintaining or repairing the machine, turn off ignition key and wait until all moving parts have come to a complete stop.
  • Page 39 Disc mower GMD883 - Tighten nuts to release the friction discs. - Let the friction discs slip for a few seconds. - Thread nuts away until they bottom against the threaded studs. The friction slip clutch is ready to function.
  • Page 40 Disc mower GMD883 Adjusting the machine Lateral adjustment of the lower links - Balance the play on either sides of the lift linkage and lock lower link stabilizers. Frame height adjustment. Working position: - Lower the tractor lift linkage so that hitch pins are at a distance 600 mm (2’) from the ground.
  • Page 41 Disc mower GMD883 Uncoupling the machine The machine must be uncoupled in working position. - Unlock and remove lynch pin (1). - Remove pin (2). - Lower parking stand (3). - Insert pin in one of the 3 parking stand upper holes corresponding to parking position (4).
  • Page 42 Disc mower GMD883 Position (a): Circuit open. Position (b): Circuit closed. - Check that all suspension system valves are shut- off (3). - Disconnect hydraulic hoses and electric plug. - Place hydraulic hoses and electric signalling plug in their respective supports (4).

  • Page 43: Instructions For Transport

    Disc mower GMD883 $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 44 Disc mower GMD883 Putting the machine in headland turn position: - Place central switch in position (a). - Select the 2 mowing units using switch (1). - Activate tractor hydraulic outlet associated with the control box. Wait until cylinders are fully retracted.
  • Page 45 Disc mower GMD883 - Check that transport locks (4) are fully engaged. - Activate machine offset using the hydraulic offset cylinder to centre the frame. From the tractor cab, check that the offset mark (2) is in line with mark (3).
  • Page 46 Disc mower GMD883 Adjust main frame height with regards to the ground: - Lower the tractor lift linkage so that hitch pins are at a distance H = 500 mm (1’8’’) from the ground. The machine is in transport position.

  • Page 47: Conformity With The Road Regulations

    Disc mower GMD883 2. Conformity with the road regulations Before driving the machine on public roads, ensure that the machine meets current highway code regulations. - Check that the signalling panels are clean and that the lighting equipment functions before going on public roads.

  • Page 48: Instructions For Work

    Disc mower GMD883 $INSTRUCTIONS FOR WORK 1. Putting the machine into work position 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.
  • Page 49 Disc mower GMD883 Release locks: - Place central switch in position (a). - Maintain switch (1) in position (b). - Activate tractor hydraulic valve connected to the control box to release locks. - Pull release cord until stop pins are released.
  • Page 50 Disc mower GMD883 Putting the machine into work position: - Place central switch in position (b). - Select the 2 mowing units using switch (2). - Activate tractor hydraulic valve connected to the control box to lower the mowing units.
  • Page 51 Disc mower GMD883 - Remove lynch pin (1) to release bracket (2) and unfold guards (3). - Lower stop rod (4). The machine is in working position. Instructions for work...

  • Page 52: Putting The Machine In Headland Turn Position

    Disc mower GMD883 2. Putting the machine in headland turn position Before putting the machine into headland turn position: - Check that nobody is within the machine pivoting area. - If there is someone, make sure the person moves away.

  • Page 53: Adjustments In Working Position

    Disc mower GMD883 3. Adjustments in working position Cutting height The desired cutting height is obtained directly by adjusting the top link length. The height can be adjusted between 30 and 80 mm (1.1’’ - 3.1’’) depending on the tractors.
  • Page 54 Disc mower GMD883 Ground pressure The ground pressure adjustment determins the safety breakback adjustment. Example: when the pressure in the gauges increases, the ground pressure of the mowing units decreases and the breakback force increases. The suspension of the mowing units is obtained by 4 hydro-pneumatic accumulators.By...
  • Page 55 Disc mower GMD883 Reduced or increased ground pressure The following adjustments do not cause the machine to move. The direction of operation of different functions may be inverted depending upon the way the hydraulic hoses have been connected to the tractor outlet.
  • Page 56 Disc mower GMD883 • Check the pressure increase indication on the gauge. • Check the pressure decrease indication on the gauge. - When the required pressure is reached, close the valve. Proceed the same way for second mowing unit by inverting opening/closing of mowing unit suspension valves.
  • Page 57 Disc mower GMD883 Swathing system The swathing system comprises: - 2 Swath wheels. The swath width is 2.40 m (7’10") approximately. Right swath wheel Make sure that distance (J) equals at least 15 mm (0.6’’). The swath wheel's lateral position (A) and angle (X) can be adjusted.
  • Page 58 Disc mower GMD883 Left swath wheel Make sure that distance (J) equals at least 15 mm (0.6’’). The swath wheel's lateral position (A) and angle (X) can be adjusted. Instructions for work...

  • Page 59: Machine Use

    Disc mower GMD883 4. Machine use Before mowing and to reduce risks of projections, lower front guards. Keep all persons and animals away from the machine danger zone. Never lean or step on the protection cover. Before the machine engages the crop:...
  • Page 60 Disc mower GMD883 Lateral offset During work, the machine frame can be offset laterally to avoid strips of uncut crop when turning or on slopes. When turning: When turning at work, the overlap between the mowing units can be insufficient.
  • Page 61 Disc mower GMD883 On slopes During work, the machine frame can be offset laterally to avoid strips of uncut crop when turning or on slopes. During work on slopes, the mowing unit overlap can be insufficient due to the tractor rear axle side drift.

  • Page 62: Optional Equipment

    Disc mower GMD883 $OPTIONAL EQUIPMENT 1. Yokes Part no. 4604603 A specific yoke is available as option for tractors equipped with a 1 3/4’’ - 20 spline pto stub. Part no. 4604604 A specific yoke is available as option for tractors equipped with a 1 3/8’’...

  • Page 63: Raised Skid Shoes

    Disc mower GMD883 3. Raised skid shoes Equipment delivered depending on country. Kit no. 1076440 (x2) The raised skid shoes enable mowing higher, between 60 and 120 mm (2.4’’ - 4.8’’). Replace the end disk skids by the 2 raised skid shoes.

  • Page 64: Maintenance And Storage

    Disc mower GMD883 $MAINTENANCE AND STORAGE Before adjusting, maintaining or repairing the machine, turn off ignition key and wait until all moving parts have come to a complete stop. Maintenance and storage...

  • Page 65: Frequency Chart

    Disc mower GMD883 1. Frequency chart Every 200 After the first hours or at the Every 50 hours 10 hours of use end of the season Lubrication Oil change: - Cutterbar. - Side gearbox. - Central gearbox. Grease: - Offset cylinder pivot pins.

  • Page 66: Cleaning The Machine

    Disc mower GMD883 2. Cleaning the machine Clean the machine thoroughly. 3. Lubrication Clean grease zerks before greasing. Lubricate with SHELL multi-purpose grease grade NLGI2. Maintenance and storage...
  • Page 67 Disc mower GMD883 PTO shaft Primary PTO shaft - Every 250 hours: • universal joints (1). - Every 40 hours: • transmission tube (2). • guide rings (3). Secondary PTO shaft - Every 250 hours: • universal joints (1). - Every 40 hours: •...

  • Page 68: Oil Change

    Disc mower GMD883 Oil change Cutterbars Before draining oil, operate the machine for a few minutes so that the oil warms up. The cutterbar is lubricated with 2.25 L (0.7 US gal) of SHELL SPIRAX A extreme-pressure gear oil with viscosity grade SAE80W90 and API grade GL5.
  • Page 69 Disc mower GMD883 Angle gearboxes Before draining oil, operate the machine for a few minutes so that the oil warms up. The angle gearbox is lubricated with 0.6 L (0.16 US gal) of SHELL SPIRAX A extreme-pressure oil for mechanical transmissions with viscosity grade SAE80W90 and API grade GL5.
  • Page 70 Disc mower GMD883 Central gearbox Before draining oil, operate the machine for a few minutes so that the oil warms up. The angle gearbox is lubricated with 5.5 L (1.45 US gal) of SHELL SPIRAX A extreme-pressure oil for mechanical transmissions with viscosity grade SAE80W90 and API grade GL5.
  • Page 71 Disc mower GMD883 Grease: - Offset cylinder pivot pins (1). - Lift cylinder pivot points (2). - Offset linkage pivot points (3). Maintenance and storage...
  • Page 72 Disc mower GMD883 - Transport stops and stop pins (5). Fold the machine in transport position to access the grease zerks. - Carrying frame pivot points (6). Maintenance and storage...

  • Page 73: Maintenance

    Disc mower GMD883 4. Maintenance Before leaving tractor before adjusting, maintaining repairing machine, disengage the PTO drive, turn off the engine, remove ignition key and wait until all moving parts have come to a complete stop and apply park brake.
  • Page 74 Disc mower GMD883 The drive system Following all service operations on the drive system, check that the distance between the side gearbox drive shaft and the upper side of the cutterbar stiffener equals measure A =577 mm (1’10’’) 4 mm (0.15’’).
  • Page 75 Disc mower GMD883 Checking the cutterbar oil level Periodically check the cutterbar oil level: - Place the cutterbar in horizontal position (with regards to X and Y axis). - Remove filler plug (1) and (2) as well as their seals.
  • Page 76 Disc mower GMD883 Inspection of knives and securing elements Immediately replace worn or damaged parts with genuine KUHN parts. Knives Inspect systematically all knives before the machine is operated to: - guarantee the cutting quality. - guarantee safety in use.
  • Page 77 Disc mower GMD883 Fixing elements Check the fixing elements: - After hitting an obstacle. - When replacing knives. - At the beginning of each season. The fixing bolts should be changed in the following cases: - When there is visible warping.

  • Page 78: Disc Replacement

    Disc mower GMD883 Knife replacement Replace knife lock-nuts and bolts when they have been removed 5 times. Replace systematically all worn or distorted knives. Never straighten a bent knife. Always replace both knives per disc. Clean the nut case. - Place a wooden wedge between two discs to stop them from rotating.
  • Page 79 Disc mower GMD883 Check if there is still a gap of 1 mm (0.04’’) between the disc lower part and the cutterbar wear plates. If this is not the case, fit one (maximum two) spacer(s) between the disc and the mounting hub (Part no.

  • Page 80: Storage

    Disc mower GMD883 5. Storage At the end of each season - Clean the machine thoroughly. - Drain all gearboxes and cutterbar and refill with new oil: See section ’’Lubrication’’. - Touch up paint if necessary. - Put the machine under cover in a dry place.

  • Page 81: Trouble Shooting Guide

    Disc mower GMD883 $TROUBLE SHOOTING GUIDE Problem Cause Remedy Dull or broken knives. Replace knives. Make sure the arrow on the Uneven stubble. Knives not installed correctly. knife upper face is pointing in the disc's direction of rotation. Too low PTO speed (rotational Increase speed to 1000 min frequency).
  • Page 82 Disc mower GMD883 Adjusting the hydro-pneumatic The suspension circuit valve is Open the suspension circuit accumulator pressure on the closed. valve. move is not possible. Replace the faulty component Faulty valve. if necessary. Excessive noise caused by a control or check valve.

  • Page 83: Limited Warranty

    Disc mower GMD883 $LIMITED WARRANTY Limited warranty...
  • Page 84 Disc mower GMD883 Limited warranty...

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