Multidisc Mowers GMD 44-55 - 66 and 77HD SELECT GRASS HARVESTING AT ITS BEST!
Multidisc Mowers GMD series 44-55 - 66 and 77HD SELECT The achievement of several decades of experience... 1 A respectable working speed, high performance mowing. With the GMD Multidisc Mower, farmers discover a new way of life and unmatched comfort of use. Continually improved over the years, GMD multidisc mowers have made KUHN the world s first manufacturer of multidisc mowers. The Kuhn range of multidisc cutterbars are now incorporated in a large range of mowers and mower-conditioner models. They have in common: reliability - efficiency and working quality. KUHN offers solutions for mowing while meeting your requirements in terms of: COST REDUCTIONS GOOD PRACTICES COMFORT - QUALITY OF LIFE PROXIMITY - ADVICES PEACE OF MIND - SERVICES Mastering science and technology To optimise machine design, enormous sums are invested in the most sophisticatedtesting equipment. Computer aided design helps optimise the machines supplied to our customers. Results of tests performed world-wide are computerised for checking and analysis. State of the art technology and innovation are the main goals of the KUHN Research and Development Department. SPECIFICATIONS A strict monitoring Equipped with ultra-modern instruments, the computer-controlled checking centres ensure the machining dimensions are scrupulously respected at all manufacturing stages. GMD 44 SELECT GMD 55 SELECT GMD 66 SELECT GMD 77HD SELECT Number of discs 4 5 6 7 Working width (m/ft) 1.60/5 3 2.00/6 7 2.40/7 10 2.80/9 2 Average swath width (m/ft) 1.20/3 1 1.40/4 7 1.80/5 11 2.20/7 3 Weight (kg/lb.) 366/805 405/891 452/995 530/1166
They all have the same qualities... Only the working widths vary! GMD 44 SELECT* Ideal for small farms, the GMD 44 Select, designed for operation with low horse power tractors, has been developed from the same technology used to create the top-of-the-range models. Its working width is of 1.60 m (5 3 ). For transport, this model is equipped with a vertical lift crank or a hydraulically controlled lift depending on the customer s request. 2 GMD 55 SELECT A particular feature of the GMD 55 Select Multidisc Mower, with a working width of 2 m (6 7 ), is that the two inner discs rotate in the same direction. This forms a slightly narrower swath so that the tractor tyres do not run over the cut crop. GMD 66 SELECT This 6 disc multidisc mower has a working width of 2.40 m (7 10 ) for a high output. The forged large-diameter pinion gears and high-capacity bearings used on MULTIDISC MOWERS of this series meet the strictest requirements in terms of endurance and reliability. For improved stability, lower parking stand when parking the machine GMD 77HD SELECT* With a working width of 2.80 m (9'2"), this Heavy-Duty 7-disc mower is designed to efficiently cut larger fields and may be operated by most medium horsepower tractors. Upgrades over the standard SELECT mowers include disc pinions fitted with heavy-duty, double angular contact, ball bearings and heavy-duty discs designed for long life in abrasive soil conditions. - Reinforced disc bearing housings. * Not all models are available in all countries.
Multidisc Mowers GMD series 44-55 - 66 and 77HD SELECT A largely tested technology 3 What s important is what s inside. Some disc mowers may look like KUHN multidisc mowers from the outside but what s inside is the most important. When choosing a disc mower, check on what cannot be seen from the outside. As time goes by, a cheap machine can prove to be the most expensive purchase ever made. A perfect balance: Disc pinion shaft bearings are positioned in respect to the blade line of force : no out of balance forces; long bearing service life. 1 High quality blades, meeting very strict safety standards! Their helical shape ensures a clear cutting. The quality of the blades is certified by the KUHN diamond logo engraved in the metal. 2 Large diameter forged gearwheels and drive pinions for high performance and time proven durability even in adverse conditions. 3 Disc pinion shafts are mounted on robust ball bearings located in cast monobloc housings. 7 4 No risks of wear or distortion: Idler gear fasteners are located in heat treated steel cups welded to the gear pans. 5 A completely sealed cutterbar. Thick diameter O-ring for the cutterbar gearcase and seal rail between both cutterbar pans (no paper gasket or instant sealing compound is used). 6 Discs are secured by a self-locking nut to the splined pinion shaft (no fastening by roll pins to smooth shafts) 1 7 For your safety, the blades of a KUHN multidisc mower are secured with heavy bolts made of heat treated steel, and not by a quick fitting system. Located inside steel cups welded to the discs, knife fixation nuts are perfectly protected from wear.
A. Compact mower unit 4 With its low profile design, the cutterbar cuts an even crop whatever the density. A C B. Oval discs with ribbed profile Oval discs have several advantages: higher efficiency in the removal of cut grass, maximum knive overlap for a clean and even mowing action, almost no risk of a foreign material getting jammed between two discs. B D C. Deflector shields Deflector shields are fitted between the disc guards. A knife deformed towards the bottom will not cut into the cutterbar gearcase. 5 D. Protective disc guards and outer skids Disc guards made of heat-treated steel protect the discs. The cutterbar is kept away from the ground s abrasive elements by the skid shoes of the disc guards. 5 6 2 3 4
Multidisc Mowers GMD series 44-55 - 66 and 77HD SELECT Common features and benefits 5 Suspension spring The suspension spring allows accurate adaptation of cutterbar flotation to ground conditions. The flotation spring tension is determined by adjusting the main frame height using the tractor s 3 point lift. Follow contours The articulated cutting unit follows ground contours with maximum accuracy, even when mowing banks or ditches. Safety breakaway mechanism Should an obstacle be struck, the safety breakaway causes the mower unit to swing slightly backwards. The impact is significantly reduced. The device is reset simply by reversing. Belt drive Cutterbar lift Compact transport dimensions A set of V-belts transmits power to the bevel gearbox. The bearing housing of the main pulley includes an easily accessible belt tensioner (for better illustration the belt guard has been removed). All KUHN disc mowers feature a hydraulic cutterbar lift cylinder. The GMD 44 SELECT can also be supplied with a crank for mechanical lifting! For road transport, the front safety cover is folded up and the cutterbar is raised to the vertical position. This minimises transport width and transfers the machine s centre of gravity close to the tractor. The machine forms a compact unit with the tractor without restricting visibility to the rear. A locking rod secures the cutterbar in vertical position.
Optional equipment Disc guards with high skids shoes 6 For increased cutting heights, special disc guards with high skid shoes are available for all the GMD SELECT multidisc mowers. Extended swathboards In certain circumstances where swath widths need to be reduced, such as when a narrow pickup follows the mower, extended swathboards are available. Additional cones (GMD 55 Select and GMD 77HD Select) The GMD 55 Select swath width can be reduced by approx. 300 mm (1 ) in high density crops by replacing the second disc by a cone. PTO shaft with overrunning clutch Use of a PTO shaft with overrunning clutch is recommended if the Mower is attached to a tractor with an automatic PTO brake. Standard on GMD 77HD Select. Lighting and signalling For increased safety when travelling, consider fitting a lighting and signalling equipment on the mower.
SPECIFICATIONS GMD 44 SELECT GMD 55 SELECT GMD 66 SELECT GMD 77HD SELECT 3 point attachment (categories) I and II Number of discs 4 5 6 7 Working width (m/ft) 1.60/5 3 2,00/6 7 2.40/7 10 2.80/9 2 Average swath width (m/ft) 1.20/3 11 1.40/4 7 1.80/5 11 2.20/7 3 Theoretical PTO power requirement 21/28 25/35 31/42 38/50 (kw/hp) Approx. work rate per hour (ha/acres) 1-1.5/2.5-3.7 1.5-2/3.7-5 2-2.5/5-6.1 2.5-3/6.1-7.4 Cutterbar raised for transport Mechanical or hydraulic lift Hydraulic lift Outer swath board Standard Weight (kg/lb) 366/805 405/891 452/995 530/1166 Safety breakaway Width in transport position Tractor width + approx. 25 cm / 10 Necessary tractor hydraulic outlet Optional equipment 1 single acting valve PTO with overrun clutch Standard Lighting and signalling Extended outer swathboard to reduce swath width by approx. 20 cm (8 ) Standard Inner swathboard to reduce swath width by approx. - 30 cm (12 ) Additional disc with cone (to be installed at tractor side) to reduce swath - Standard Standard width by approx. 30 cm (12 ) Our material is produced in accordance with the European Machinery Directive in the member states of the European Union. In countries outside the E.U., our machinery complies with the safety regulations set by the country concerned. Some safety devices may have been removed from our leaflets in order to clarify the illustration. Under no circumstances should the machine be operated without the necessary safety devices in place (as specified by the assembly instructions and operators manual). We reserve the right to change any designs, specifications or materials listed without further notice. Our models and trademarks are patented in more than one country. Machines and equipment in this leaflet can be covered by at least one patent and/or registered design. Registered trademark(s). YOUR KUHN DEALER: KUHN S.A. - F 67706 Saverne Cedex www.kuhn.com KUHN NORTH AMERICA Corporate Headquarters 1501 West Seventh Avenue - P.O. Box 167 Brodhead, WI 53520-0167 USA Tel: (608) 897-2131 - Fax: (608) 897-2561 www.kuhnnorthamerica.com KUHN FARM MACHINERY PTY. LTD 7 Manorwood Pl. - MITCHAM, 3132 VIC, Fax: 03 9874 3462 www.kuhn.com United Kingdom : KUHN FARM MACHINERY (U.K.) LTD Stafford Park 7, TELFORD - SHROPSHIRE TF 3 3 BQ Phone: TELFORD (01952) 239300/1/2 Fax: (01952) 290091 www.kuhn.co.uk To protect the environment, this leaflet is printed on chlorine-free paper. / Printed in France - 920032 GB - 12.08 - Copyright KUHN 2008