Disc mowersGMD Series 100 and 100 - GII

G R A S S H A R V E S T I N G A T I T S B E S T !

A high rate of working speed, anon-clogging cutterbar, and no blades to sharpen.

These features and many more areavailable in the full range of rear 3 point mounted GMD MultidiscMowers manufactured by KUHN.

With several hundred thousand discmowers manufactured over the lastthirty years, KUHN has continuouslyimproved the GMD multidisc mowerand remains the largest manufactu-rer of multidisc mowers in theworld.

KUHN offers solutions for mowing while meetingyour requirements in terms of:

Disc mowersGMD Series 100 and 100 - GII

COST REDUCTIONS GOOD PRACTICES

COMFORT - QUALITY OF LIFE PEACE OF MIND - SERVICESPROXIMITY - ADVICES

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Working width (m/ft) 1.60/5’3” 2.00/6’7” 2.40/7’11” 2.80/9’2” 3.11/10’2”

Number of discs 4 5 6 7 8

Average swath width (m/ft) 1.10/3’7” 1.40/4’7” 1.70/5’7” 2.00/6’7” 2.40/7’11”

Approx. weight (kg/lbs) 379/834 427/940 535/1177 567/1248 646/1421

GMD 100 and 100 - GIIseries: choose the one bestsuited!• Working width ranging

from 1.60 to 3.11 me-ters/5’3” to 10’2”,

• HD versions for difficultconditions,

• Attachments to formvarious swath widths.

GMD 400 GMD 500 GMD 600 - GII GMD 700 - GII GMD 800 - GII

GMD 400 (1.60 m / 5’3’’)

Designed for work on farms with low horsepower tractors, the GMD 400 usesmany features available on KUHN’s largest disc mowers. Though a smallmower, the GMD 400 retains the long lifedurability and high operational capacityof KUHN’s larger disc mowers.

GMD 500 (2.00 m / 6’7’’)

For operations on mid-size tractors theGMD 500 gives the operator the produc-tivity needed to match the needs of thefarm operation.

A complete range to satisfy every need

Disc mowersGMD series 100 / 100 - GII

S P E C I F I C A T I O N S

GMD 700 GII (2.80 m / 9’2’’)For farms with increased productiondemands, greater time limitations, andmoderate horsepower, the GMD 700 - GIIoffers the best blend of cost, features, andcutting width. The large cutting widthallows cutting at a rate approaching thatof many disc mower conditioners.

GMD 800 GII (3.11 m / 10’2’’)

Largest of the series, the GMD 800 - GIIdisc mower is fitted with 8 discs for 2.40 m (7’11”) wide swaths.

GMD 600 - GII (2.40 m / 7’10’’)

The GMD 600 - GII offers the farmer highproduction capability and ease of opera-tion with a power requirement of only 45 horsepower. Placed in the middle of the range of KUHN disc mowers, the GMD 600 - GII gives midsize hayoperations greater capacity and efficien-cy of operation.

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Simplicity of Operation

The new lift and suspension system allowsboth the cutterbar and the inner shoe to be raised off the ground using only themower’s hydraulic cylinder, simplifyingoperation and increasing productivity. Thetractor’s 3pt hitch stays at the same presetheight.

Full range of operating capability

The new suspension system providesbuilt-in capability for mowing terracesand banks. The operating range is a full+ or - 35 degrees.

Even floatation over theentire cutterbar

A heavier compensating spring ensuresthe cutterbar will operate with optimumground pressure through a wide range ofterrain and contours.

Attachment and parking

The new G II suspension system elimi-nates the need for a parking stand by locking out the suspension spring with aparking latch. Once unhooked the moweris free standing and the 3pt frame is locked horizontally for fast attachmentthe next time the mower is used. (GMD 600 / 700 / 800 - GII).

Semi-automatic Belt Tension

Belts are automatically readjusted duringnew belt run-in. They feature easy andaccurate adjustment of belt tension. And, a KUHN exclusive, proper pulley-to-pulley dimension is maintainedregardless of the load on the belts forincreased belt life. (GMD 600 / 700 /800 - GII).

DISC MOWERS GMD 600 - GII

DISC MOWERS GMD 500

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Oval shaped disc for quality mowing :

• Sophisticated disc profilefor positive ejection ofmowed crop also provi-des protection to theblade bolts and long life,

• A less power demandingheader thanks to theoptimum crop flow andreduced rearward force,

• Increased knife overlapfor a cleaner, more evencut by attaching knivesto a larger diameter disc,

• A bent knife cannotcontact a neighbouringdisc.

• Very little risk of aforeign body gettingjammed between twodiscs.

Keys to successful operation!

Disc mowersGMD series 100 / 100 - GII

Compact streamlined cutterbar…

New design: Very flat and smooth cutter-bar that reduces soil or crop residuesfrom building up. It features an excellentcrop flow even in very dense crops.

… Perfectly protected!

A stiffener ensures extra rigidity of thecutterbar gearcase.

Knives

KUHN knives are made of high qualitysteel and manufactured to very strict standards! For safety and long life, knivesare attached with specially designedhardware, not “quick fastening” devices.

In certain countries, a “Heavy Duty” (HD) version of the GMD 400/500/600/700 andGMD 800 - GII is available for working in particularly difficult conditions. The machinesare equipped with heavier discs and disc guards.

A heavy duty (HD) version for difficult working conditions

Large steel forgings

The front part of the disc is fitted withlarge forged steel cups ensuring a veryefficient protection of the knife attachmenthardware and providing exceptional discservice life A .

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Detailed view of the internal components of the GMD Series 100 & 100 Generation II cutterbars

Some disc mowers may look like a KUHN from the outside. However what is on the inside is more important. KUHN’s design and construction standards ensure a long life and reliableoperation.

The substandard design and construction of an inexpensive machine can lead to expensiverepairs and time loss in the field.

Withstands the highest loads: High capacity bearings-fitted in a one piece sealed housing not subject to distorsion.

Protection should an obstacle be struck: The PROTECTADRIVE® system is designed to protect the cutterbar gear train andminimizes downtime risks in full season.

Long-term reliability: Large diameter gearwheels in high tensile forged steel with reinforced teeth.

Perfect sealing: O-rings used on cutterbar bearing housings for a perfect, leak-free seal.

Increased service life: Disc pinion shaft bearings endure radial forces for longest bearing life. This optimum position improves the load balance.

Minimum wear or distortion risks: Idler gear fasteners are located in heat treated steels cups. Correct alignment is ensured without the risk of distortion.

Highly wear resistant: Knife attachment hardware is fully protected. For added safety, heat treated steel cups are welded to the disc.

Take a close look at all of the features!

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Protective disc guards and skid shoes

1. Heat- treated steel skid shoes fitted oneither disc ends ensure contact betweenthe cutterbar and the soil.

2. Heat-treated disc guards protect theother discs.

Attached to the front of the bar and to therear stiffener, they make replacement asimple procedure. These heat-treatedparts are important in stony or sandysoils

Deflector shields

Wear blocks fitted between the discguards protect the cutterbar. Knives bentdown by contact with an obstacle aregenerally prevented from striking the cutterbar. These shields also protect the cutterbar from the abrasive effects of soiland debris moving with the cut crop.

Machines designed for long life and ease of maintenance.

Disc mowersGMD series 100 / 100 - GII

Minimized downtime with fast removal disc bearing stations

Fast and easy removal and installation ofthe disc bearing station. For maximumreliability and minimum down time, the stations which include the housing,bearing and pinion shaft are factory-assembled.

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8For transport, the safety coveris folded back and the cutter-bar is raised to the verticalposition. Transport width isminimised without restrictingvisibility to the rear.In addition the following func-tions can be performed fromthe tractor seat:1. Cutterbar raised and lowe-red from the field transport position through the use of only one hydraulic controllever.2. Raising and locking the cutterbar into road transportposition3. Unlocking and lowering the cutterbar from the roadtransport position.

More features for: Safety, Simplicity & Ease of Operation

Safety breakaway mechanism

Should an obstacle be encountered, thesafety breakaway allows the mower toswing slightly rearwards, significantlyreducing the impact load on the cutter-bar. The device is simply reset by backingup.

A feature exclusive to Kuhn, one tool for all adjustments

One tool, supplied with the mower, willperform all of the following:- Adjustment of the floatation spring- Belt tension adjustment- Replacement of knives- Removal of discs- Unlocking the safety cover.

Constant hitch height

Once in the field position, the hitch heightdoesn’t need to be adjusted. To ensure the proper hitch height and floatationadjustment, a heavy-duty check chain issupplied as standard equipment.

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Outer swath wheel for perfectswath formation (standard)

Used as an improvement over a swathboard, the swath wheel is mountedbehind the outer disc cone and functionsto separate the cut crop from the uncutcrop allowing the right tractor wheels todrive over the ground instead of the previously cut crop. The advantages ofthe swath wheel over a swath board are:- fits entirely under the curtain- not touching the ground so damage by

backing or turning is eliminated.

Inner swath wheel for GMD 600 - GII (optional equipment)

Reduces the swath width on the GMD 600 - GII to approximately 1.50 m/4’11’’/1.60 m/5’3”wide.

2nd Inner high cone for GMD 700 - GII(optional equipment)

To reduce swath width on these mowers,the second flat disc is replaced with a high cone that reduces the swath width to approximately 1.70 m/5’7” - 1.80 m/5’11”

High quality, clean, hayand forage is the key togetting the productivitydesired from a herd. KUHNoffers several standardand optional features thatallow the swath to be tai-lored to what best suitsspecific operational needs.

Standard and Optional Features for Swath formation.

Disc mowersGMD series 100 / 100 - GII

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Inner swath wheel for GMD 700 - GII (optional equipment)

Used in conjunction with the 2nd highcone, the inner swath wheel on the GMD 700 - GII will reduce the swath toapproximately 1.50 m/4’11’’ wide.

Standard offset capability

To ensure a full width of cut when themower is attached to tractors with varioustrack widths, the GMD 400 & 500 havean offset range of 172 mm/ 7’’, the GMD 600, 700 & 800 GII have an offsetrange of 105 mm/4’’.

Greater optional offset capability on the GMD 600, 700& 800 - GII (optional equipment)

An extended left hitch pin is availablethat extends the offset of the GMD 600,700 & 800 - GII up to 200 mm/8’’ to theright.

For outstanding tractor/mower adaptation

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One goal: Harvest a highly nutritional crop for maximum quality!

Disc mowersGMD series 100 / 100 - GII

Amount of dry matter/hectare and nutritional value per ton ofDM/ha: aim the highest levels!

• Give hay a good place in the feeding operation to save on concen-trates,

• For the cheapest and best-balanced base ration, rely on hay and hay silage. The more the field produces energy, proteins andminerals, the lesser additives are required.

Aim for highly nutritional hay crop at a lower cost!

Careful mowing to obtain high value hay! - Mow at the stage adapted to the harvesting method, hay or hay silage,- Harvest clean high quality hay to improve the intake and energy coverage capacity as well as the digestibility.- Increase the number of cuttings per year (starting earlier).

Preserve the field- Its lifetime: if the plant deteriorates itself, temporary pastures/fields must be renewed more rapidly which means additional costs,- Its quality: if forage varieties are destroyed, lower value forage varieties could settle causing hay silage or hay value to drop.

Bank on hay: give yourself the means with KUHN Disc mowers! The more you demand of your hay crop, the more it will have to behandled carefully.

126 ways to harvest all the crop’s value and how, by listening to farmers’ needs, KUHN has improved its equipment

No. 2: A clean, even cut

To prevent leaf loss or damage to plants that risk then being affected by illnesses, diseases, only forage must be harvested.KUHN Advantages: - The disc mower bevelled knives ensure a high quality clean, even cut,- The oval-shaped discs, and compact and streamlined profile of the cutterbar reduces

soil and crop residue accumulation.

No. 1: Mowing at a cuttingheight of 5 to 7 cm

1st reason: Less impurity is moved intothe crop, not only when mowing but alsoduring the whole forage harvesting operations, tedding and raking.

2nd reason: increased high-valueforage varieties. The crop yield is reduced if cut to close to the ground,which allows undesirable weeds andplants to grow.

3rd reason: increased crop yield andproductivity; by taking care of new budswhich will form the plant and build up itsreserves; by preserving the tillering basewhich composes the sugar reserves of theplant and the new buds.An intensively worked crop is more sensitive to accidents and stresses asplants are not deeply rooted.KUHN Advantage: An ideal and constant cutting height isobtained by simple adjustment of the toplink.

No. 3: Grass must be cut notchopped!

The crop is quickly ejected into the swathand is only cut once.

KUHN Advantage:The crop is quickly ejected into the swathand is only cut once. On mowers where anumber of discs turn the same way thereis a double-cutting effect on the crop (On5 and 7 disc machines, only the two innerdiscs turn the same way). Double cuttingof the crop causes higher crop losses,delays regrowth and increases the powerrequirement on the tractor.

13Graphical representation of the effect of impurities

on the nutritional value of hay.Source: I.N.R.A.

The best hay will have an impurity level no greater than 3 %for an average energy level of 6 MJ/kg DM.

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KUHN supports farmers wanting to make best use of their hay fieldsand reduce hay crop production costs!

Disc mowersGMD series 100 / 100 - GII

No. 4: field conditions

Some conditions are difficult to control:moles, drought, floods, whereas, grassstubble destruction can be avoided bychoosing the proper mower. The more thehay fields are productive, the more theyare sensitive to damage. Therefore giveyourself the tool to preserve them.Otherwise, deeply rooted plants whichare often undesirable (rumex, dande-lions, etc) would develop.KUHN Advantage: Perfect follo-wing of irregular grounds.With an ideally designed floatation system KUHN disc mowers reduce theamount of down pressure required foruniform mowing. Skid shoe wear anddamage to the cutterbar and grass stubble is reduced.

No. 5: Mow at the right time

For silage hay even more than for hay,harvesting at the right stage means collecting the full value of forage plants:sugars, proteins, minerals and dry matter.Therefore, when good weather conditionsand plant stage is ready, it’s time to mow.You can also postpone mowinguntil the afternoon rather than mowing inthe morning when the soil and grass arestill wet.

KUHN Advantages:- The disc mower floatation that allows

appropriate working speeds,- The machine’s reliabi-lity - the mower

won’t let you down during mowing operations,

- Easy swath clearing and headland turnmaneuvering thanks to the single cylinder operated lift linkage,

- Cutting width adapted to the workingsurface.

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No.6: Swath delivery

Optimum correspondence between amower and a tedder for even tedding.

KUHN Advantages:See page 11 & 12 for a list of the standard and optional features availablefrom KUHN that can best customize a mower for easy tedding by a GYROTEDDER.

YOUR KUHN DEALER:

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 bythe 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 devicesin 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).

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S P E C I F I C A T I O N S GMD 400 GMD 500 GMD 600 - GII GMD 800 - GIIGMD 700 - GII

Attachment 3- point cat. 1 & 2 3- point cat. 2

Working width (m/ft) 1.60 / 5’3’’ 2.00 / 6’7” 2.40 / 7’11’’ 2.80 / 9’2” 3.11 / 10’2’’

Number of discs 4 5 6 7 8

Number of knives (2 per disc) 8 10 12 14 16

Removable disc bearing stations standard

PTO drive (rpm) 540

Cutterbar vertical folding and automatic by mower’s hydraulic cylinderlocking for transport

Cutterbar unlocks for work in cab control

Outer swath wheel standard

Average swath width (m/ft) 1.10 / 3’7’’ 1.40 / 4’7” 1.70 / 5’7’’ 2.00 / 6’7” 2.40 / 7’11”

Safety breakaway standard

Min. PTO power requirement (kW/HP) 21/28 25/35 31/42 37/50 41/56

Approx. weight kg/lbs 379/834 427/940 535/1177 567/1248 646/1421

Necessary hydraulic outlet one single acting valve

Mowing at 35° below horizontal - standard

Stability of the uncoupled machine by parking stand by parking latch

Reinforced PTO shaft with free wheel ■ ■ standard standard standard

Inner swath wheel to reduce the swath approx. swathwidth depending on conditions width 1.50/

1.60 m (4’11’’/5’3’’)

High cone to reduce the swath width approx. swath approx. swath depending on conditions width 1.10 m width 1.75 m

(3’7”) (5’9”)

Inner swath wheel to be combined with approx. swathhigh cone o reduce the swath width widthdepending on conditions 1.50/1.60 m

(4’11’’/5’3’’)

Inner swath board to be combined with approx. swath approx. swathinner swath wheel (GMD 600-GII) and width widthhigh disc cone + inner swath wheel 1.20 m / 3’11’ 1.25 m / 4’1’’(GMD 700-GII) depending on conditions

Kit for mowing 40° below horizontal ■ ■

Lighting and signalling system ■ ■ ■ ■ ■

Extended hitch pin to offset the machine by up to 200 mm to the right for very ■ ■ ■wide tractorsRaised skids for mowing in difficult

■ ■ ■ ■ ■conditions

■ Optional equipment Rotation speed (rpm) may also be expressed as rotational frequency (min-1). Both units of measure are equivalent.

KUHN S.A. - F 67706 Saverne Cedexwww.kuhnsa.com - E-mail : info@kuhnsa.com

U.S.A. : KUHN FARM MACHINERY, INC5390 East Seneca StreetVERNON, NY 13476 - 0840Phone : (315) 829 2620 - Fax : (315) 829 2270www.kuhn-usa.com - info@kuhn-usa.com

KUHN FARM MACHINERY PTY. LTD.7 Manorwood Pl.,MITCHAM, 3132 VIC,Fax : 03 9874 3462www.kuhnsa.com - info@kuhnsa.com

United Kingdom : KUHN FARM MACHINERY (U.K.) LTDStafford Park 7,TELFORD - SHROPSHIRE TF 3 3 BQPhone : TELFORD (01952) 239300/1/2Fax : (01952) 290091www.kuhn.co.uk - info@kuhn.co.uk

Optional equipment