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KUHN GMD350 Operator'S Manual Download Page 35

Putting into service

Disc mower

GMD350 - 350-FF

33

„

Coupling the machine

- Lower the tractor three-point linkage.
- Position ball joints of tractor lower links in line with

machine lower yokes.

- Attach the lower links to the hitch pins.
- Secure each hitch pin with lynch pin.

- Attach the top link to the machine top hitch pin.
- Insert and lock top link lynch pin.

- Place release cord handle in the tractor cab.
- Lift machine using tractor hydraulic lift linkage.
- Fold and lock parking latch (1) using spring (2).

Check that the top link is attached to one of the
upper holes on the tractor side.

The parking latch must always be locked for
work and transport.

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Summary of Contents for GMD350

Page 1: ...KN205AGB C OPERATOR S MANUAL Disc mower GMD350 350 FF KN205AGB C English 03 2010 ...

Page 2: ......

Page 3: ...OW TO OPERATE AND MAINTAIN YOUR MACHINE before reading this manual carefully KEEP THIS MANUAL AVAILABLE FOR REFERENCE Pass it on to the next owner if you re sell the 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 neces...

Page 4: ...nstructions 7 Location and description of safety decals on the machine 18 Road safety equipment and recommendations 22 Machine specifications 23 Description and glossary 23 Technical specifications 24 Required equipment 25 Sound levels 26 Putting into service 27 Description of control elements 27 Coupling and uncoupling 28 Instructions for transport 43 Putting the machine into transport position 4...

Page 5: ...ts in working position 48 Machine use 52 Optional equipment 56 Chain stroke limiter 56 Outer guard hydraulic locking 57 Side deflector 58 1000 min 1 drive kit 59 Adaptation parts 59 Maintenance and storage 60 Frequency chart 60 Lubrication 61 Maintenance 66 Storage 84 Trouble shooting guide 85 Limited warranty 93 ...

Page 6: ...Disc mower 4 GMD350 350 FF Identification of the machine Identification of the machine 1 Front view 2 Rear view ...

Page 7: ...all spare parts orders Type GMD350 Serial no 4 Optional equipment Tick box corresponding to the equipment fitted on your machine Kit no A407400 Female coupler Kit no 1066090 Chain stroke limiter Kit no 1066110 Mechanical safety release Kit no 1066120 Mechanical safety release Hydraulic pivot Kit no 1066100 Outer guard hydraulic locking Kit no 1066150 Side deflector Kit no 1066170 1000 min 1 drive ...

Page 8: ...ates 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 This symbol is used to communicate technical information of particular interest ...

Page 9: ...t only be operated maintained and repaired by competent persons who are familiar with machines specifications and operation and aware of safety regulations for preventing accidents The operator must imperatively respect safety instructions in this manual and in the warnings posted on the machine The operator is also obliged to respect current legislation concerning accident prevention work safety ...

Page 10: ... place and in good condition Immediately replace any worn or damaged guard Precautions when driving Tractor handling stability performance and braking efficiency are all affected by weight distribution trailed or mounted implements additional ballast and driving conditions It is therefore of great importance that the operator exercises caution in every given situation Groundspeed must be adapted t...

Page 11: ...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 Gross weight and weight per axle Always obey current regulations for driving on roads The drawings are not legally binding their only aim is to illustrate the method to use Prior to driving on public roads check that criteria ...

Page 12: ...roads with empty hoppers and tanks Description Units Description T kg Tractor unladen weight PTAC kg Gross Combined Weight Rating T1 kg Unladen load on tractor front axle T2 kg Empty load on tractor rear axle t kg Axle loads Tractor machine t1 kg Load on front axle Tractor machine t2 kg Load on rear axle Tractor machine t1 max kg Maximum load authorized on the tractor front axle according to the t...

Page 13: ... kg 3300 lb Add ballast weights until the minimum front axle load is exceeded Repeat checking procedure Stage 3 To measure Total weight t Tractor machine transport position Ballast weights Checking To go to the next stage Check in the tractor s operator s manual that the value measured is below the tractor s Gross Combined Weight Rating To do If t PTAC go to the next stage If the total unit weight...

Page 14: ...re and rim specifiations are in conformity with the requirements of the tractor manufacturer Example Load on rear axle t2 8500 kg 18740 lb Check in the tractor s operator s manual that the value measured is below the maximum allowed tractor rear axle load Check that tyre and rim specifiations are in conformity with the requirements of the tractor manufacturer Maximum speed Always keep to the legal...

Page 15: ...draulic circuit To avoid making incorrect connections mark hydraulic couplers and corresponding hoses with colors WARNING Functions could be reversed for example lift lower and cause accidents Regularly check the hydraulic hoses In case of normal wear replace the hydraulic hoses every 5 years Damaged or worn hoses must immediately be replaced When replacing the hydraulic hoses only use hoses with ...

Page 16: ...on the machine disengage the PTO drive turn off the engine remove ignition key and wait for all moving parts have come to a complete stop If the primary PTO shaft is equipped with a slip clutch or a free wheel these must be fitted on the machine side Ensure that the PTO shaft is always correctly fitted and locked into place Before connecting the PTO shaft ensure that the PTO speed rotational frequ...

Page 17: ... Safety warning decals 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 Waste disposal Respect the environment Never spill pollutants oil grease filters etc on the ground never pour them ...

Page 18: ...te protective clothing for the work in hand gloves shoes goggles helmet ear defenders etc Do not solder weld or use a blow torch near fluids under pressure or inflammable products 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 attachin...

Page 19: ... the machine For your safety only use genuine parts Regularly check the condition of the protection covers Immediatly replace any worn damaged or missing cover Before engaging the PTO rest the cutterbar on the ground Make sure all the guards are in place Keep all persons and animals away from the danger zone Stay a safe distance from the machine when the cutting tools are in movement Never work in...

Page 20: ...Disc mower 18 GMD350 350 FF Safety 3 Location and description of safety decals on the machine Location of safety decals ...

Page 21: ...machine 2 Before leaving the tractor or before adjusting maintaining or repairing the 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 Projections 3 Stones and other debris projected by the moving parts can travel a long distance The protection covers must always be in position and in good cond...

Page 22: ... Crushing hazard 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 Cutting tools 7 The cutting tools and their attachment hardware meet safety and reliability criteria set by standards and by the manufacturer For your own safety and for correct machine operation only use original m...

Page 23: ...g the machine The ground pressure cylinder valve must remain closed during the machine uncoupling Danger accumulator 10 The hydraulic accumulator contains gaz and oil under pressure To park the machine or carry out maintenance work conform with the instructions given in the operator s manual Prior to opening the ground pressure circuit valve 11 Attach and lock the machine to the tractor A frame pr...

Page 24: ...device is composed of 1 red reflector 1 Always keep to the legal speed limit for driving a tractor machine assembly on public roads Whatever this speed we recommend for everyone s safety not to exceed a speed of 40 km h 25 mph Instructions specific to France Kit no 1066130 The machine can be fitted with specific signalling lights to comply with the road regulations Lateral signalling equipment Kit...

Page 25: ... Description and glossary 0 1 Cutterbar 2 Parking lock 3 Front guard 4 Safety breakback 5 Hydro pneumatic accumulator 6 Hitch pin 7 Gearbox 8 Lift cylinder 9 Ground pressure adjustment cylinder 10 Upper coupling yoke 11 Parking stand 12 Side guard 1 3 4 6 7 8 10 11 12 6 5 2 9 ...

Page 26: ...rking position 1 29 m 4 3 Width in transport position 1 62 m 5 3 Height in transport position 3 75 m 12 3 Length in transport position 1 45 m 4 9 Disc rotational speed 2938 min 1 PTO speed 540 min 1 Weight GMD350 Fast fit knives Kit no 1066120 Kit no 1066100 Kit no 1066130 Kit no 1066140 GMD350 Knife attachment per bolt and nut Kit no 1066110 Kit no 1066130 Kit no 1066140 822 kg 1812 lb 790 kg 174...

Page 27: ...s Disc mower GMD350 350 FF 25 3 Required equipment The machine is factory fitted with the following equipment Put into the working or transport position Mechanical safety release or Mechanical safety release Hydraulic pivot ...

Page 28: ...Sound levels Sound levels have been measured in accordance with the measuring methods as defined in NF EN ISO 4254 1 Agricultural machinery Safety Part 1 General requirements Weighted equivalent continuous acoustic pressure level at the driver s seat closed cabin L A eq Tractor only 74 2 dB A Tractor machine 76 1 dB A ...

Page 29: ...350 FF 27 Putting into service 1 Description of control elements The machine is fitted with a release cord operated from the tractor cab The machine is supplied with an 18 mm box wrench 1 to carry out certain adjustment and maintenance tasks ...

Page 30: ... 3 8 6 splines 1 A release cord 2 or When the following equipment is fitted Mechanical safety release Hydraulic pivot 1 hydraulic hose controlling the machine transport work position cylinder 1 hydraulic hose pressurizing the mowing unit pivot cylinder When the following equipment is fitted Mechanical safety release 1 hydraulic hose controlling the machine transport work position cylinder 1 2 ...

Page 31: ...s be less than 20 of the tractor s unladen weight Add ballast weights to the front in order to preserve the steering and braking efficiency The tractor must be fitted with lower link stabilizers When the following equipment is fitted Mechanical safety release Hydraulic pivot The tractor must be fitted with a double acting hydraulic outlet with float position When the following equipment is fitted ...

Page 32: ... 2 Linkage adjustment Measure dimension A If measure A is below 2 10 m 6 11 Place lower links in position a Adjust machine lower hitch pin position Loosen the 8 screws 3 Position hitch pin 1 at measure F 10 mm 0 4 Tighten 4 hitch pin screws 1 Torque 12 daN m 89 lbf ft Position hitch pin 2 at measure X 825 mm 2 8 Tighten 4 hitch pin screws 2 Torque 12 daN m 89 lbf ft E A X F ...

Page 33: ...1 Torque 12 daN m 89 lbf ft Position hitch pin 2 at measure X 825 mm 2 8 Tighten 4 hitch pin screws 2 Torque 12 daN m 89 lbf ft If measure A is comprised between 2 25 m 7 04 and 2 40 m 7 10 Place lower links in position c Adjust machine lower hitch pin position Loosen the 8 screws 3 Position hitch pin 2 at measure G 10 mm 0 4 Tighten 4 hitch pin screws 2 Torque 12 daN m 89 lbf ft Position hitch pi...

Page 34: ... of 450 mm 1 5 between the hitch pin pivot point and the ground Open valves 1 using 18 mm box spanner a Hydraulic valve bank b Ground pressure circuit Activate the transport work cylinder control valve in the pivot into transport position Check the pressure increase indication on the gauge Shut off valve of the hydraulic valve bank when the pressure reaches 105 bar 1523 psi on the gauge The machin...

Page 35: ...tch pins Secure each hitch pin with lynch pin Attach the top link to the machine top hitch pin Insert and lock top link lynch pin Place release cord handle in the tractor cab Lift machine using tractor hydraulic lift linkage Fold and lock parking latch 1 using spring 2 Check that the top link is attached to one of the upper holes on the tractor side The parking latch must always be locked for work...

Page 36: ...pressure cylinder valve 1 using 18 wrench The following procedure puts the machine mechanism under tension and balances plays in the tractor mechanism coupling links Prior to opening the ground pressure circuit valve Attach the lower links to the hitch pins Attach the top link to the hitch pin 1 1 ...

Page 37: ...hree point linkage Adjust the tractor left levelling rod according to the difference in height Avoid loosening the turnbuckle too much Hydraulic connections 1 2 3 When the following equipment is fitted Mechanical safety release Hydraulic pivot Connect the hydraulic hose of the transport work cylinder to a double acting valve with float position Connect the mechanical safety release hose with hydra...

Page 38: ...release Hydraulic pivot Lighting and signalling Connect 7 pin plug to the tractor When the following equipment is fitted Mechanical safety release When optional equipment is used follow specific procedures mentioned in the related section Lighting and signalling When optional equipment is used follow specific procedures mentioned in the related section Chain stroke limiter ...

Page 39: ...he PTO shaft is in its maximum extended position the tube overlap must be more than 250 mm 10 If this is not the case Mark length H to cut when the transmission is the maximum overlap position Shorten the guard tubes and the transmission tubes by the same length Bevel and clean the tubes Grease the inside of the outer tube Never operate the PTO shaft at an angle X exceeding 30 Make sure that the P...

Page 40: ...m 1 5 between the hitch pin pivot point and the ground Make sure that distance A equals at least 3 mm 0 1 Note the corresponding lever position in the tractor cab Tractor not fitted with a hydraulic position control function Immediately replace any worn or damaged guard When optional equipment is used follow specific procedures mentioned in the related section Chain stroke limiter When the followi...

Page 41: ...the mowing unit ground pressure circuit valve 1 using 18mm box spanner Unlock and unfold parking lock 1 on the bevel gearbox Lower and lock parking stand 1 Unlock tractor lower link stabilizers Lower the tractor three point linkage to rest the machine on the ground Make sure no foreign material is located on the bevel gearbox Check that there are no foreign bodies in front of the leg stop 1 1 1 ...

Page 42: ...he following equipment is fitted Mechanical safety release Hydraulic pivot Disconnect and store hydraulic hoses in holder 1 Disconnect and store lighting equipment 7 pin plug in its holder 1 When the following equipment is fitted Mechanical safety release Disconnect and store hydraulic hose in holder 1 1 1 ...

Page 43: ...er on the machine 1 Detach the top link from the machine end Release the lower links The machine is uncoupled Always park the machine with the cutter bar in horizontal position Never open the ground pressure circuit valve prior to having coupled the machine to the tractor lower links and top link 1 ...

Page 44: ...position is obtained by adjusting cam 2 Loosen screws 1 Pivot cam 2 according to the required setting To delay the machine pivot sequence move cam 2 counterclockwise To advance the machine pivot sequence move cam 2 clockwise Tighten screws 1 Torque 5 daN m 37 lbf ft Valve holder adjustment The oblong holes enable obtaining the valve actuator disengagement with regards to the cam when the hitch pin...

Page 45: ...th the ground Before placing the machine into transport position Wait until the rotating parts have come to a complete stop Check that nobody is located in the machine pivoting area If there is someone make sure the person moves away When the following equipment is fitted Mechanical safety release a Unlock and lift front guard using 18mm box spanner supplied with the machine The guard locks automa...

Page 46: ...transport position The machine is in transport position 2 Conformity with the road regulations Check that the retroreflective signalling equipment is clean before going on public roads Never engage the tractor PTO drive when the machine is in transport position Before driving the machine on public roads ensure that the machine complies with current highway code regulations Replace worn or damaged ...

Page 47: ...Instructions for transport Disc mower GMD350 350 FF 45 Make sure that transport lock 1 is fully engaged ...

Page 48: ...round using the mowing unit lift cylinder 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 When the following equipment is fitted Mechanical safety release Hydraulic pivot When putting the machine in work position the cutter bar simultaneously lowers itself and pivots frontwards In order to resp...

Page 49: ...round must be of 450 mm 1 5 The machine is in working position When the following equipment is fitted Mechanical safety release Unlock and lower the front guard using 18mm box spanner supplied with the machine The guard locks automatically When the following equipment is fitted Mechanical safety release Hydraulic pivot Check that lock valve actuator 1 is no longer engaged in cam 2 During work only...

Page 50: ...The distance between hitch pin axis and the ground must be of 450 mm 1 5 Modify the top link length to alter the machine tilt angle Check cutting height Before leaving the tractor or before adjusting maintaining or repairing the 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 Ground pressure c...

Page 51: ...nd pressure circuit valve Valve open a Valve closed b The maximum cutting height L1 60 mm 2 4 is obtained when the discs are parallel to the ground The minimum cutting height must not be below L2 30 mm 1 1 Too low a cutting height can lead to Excessive disc and knife wear Crop being contaminated by soil Delay in regrowth The machine hydraulic ground pressure circuit is factory set without pressure...

Page 52: ...ulator pressure to reduce the mowing unit ground pressure Place the machine in working position Open valve 1 of hydraulic valve bank using 18mm box spanner supplied with the machine Use mowing unit lift cylinder to lift the mowing unit Check the pressure increase indication on the gauge When the required pressure is reached close the valve Conventional pressure 105 bar psi MINIMUM operating pressu...

Page 53: ...n float position Open valve 1 of hydraulic valve bank using 18mm box spanner supplied with the machine Check the pressure decrease indication on the gauge When the required pressure is reached close the valve Swathing system Swathing system components 1 outer swath wheel Hydraulic valve Valve open a Adjustment Valve closed b Work and transport 1 Check that there is a minimum clearance J of 15 mm 0...

Page 54: ...nd to reduce risks of projections lower the front guard Keep all persons and animals away from the machine danger zone When the following equipment is fitted Mechanical safety release Unlock and lower the front guard using 18mm box spanner supplied with the machine The guard locks automatically Never lean or step on the protection cover At work the tractor hydraulic valve must always be in floatin...

Page 55: ...t into transport work position cylinder When the following equipment is fitted Mechanical safety release Hydraulic pivot If the cutter bar pivots rearwards during the first headland turn manoeuvre Check that lock valve actuator 1 is no longer engaged in cam 2 Readjust if necessary See section Adjusting the pivot sequence of the machine The lift linkage clears simultaneously the main frame and cutt...

Page 56: ...he rear when hitting an obstacle The safety breakback is reset by reversing a 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 In case an obstacle has been struck check that the mowing unit has not been damaged ...

Page 57: ...ard Remove foreign body Check that the mowing unit has not been damaged Check rotating components for damage Lower and lock front guard Respect spring washer layout For normal functioning of the break away latch measure L must never be below 91 mm 3 60 Before carrying out any maintenance or repairs on the machine switch off the tractor engine remove ignition key wait until all moving parts have co...

Page 58: ...one of the upper holes of the tractor top link yoke Lower the machine until the chain stroke limiter is under tension The distance between hitch pin axis and the ground must be of 450 mm 1 5 The tractor lift linkage is in working position The frame height is correct when The cutterbar is resting on the ground The chain stroke limiter is tight The lift stop has a functional play of approximately A ...

Page 59: ...ng the outer guard folding unfolding cylinder Hydraulic connections Connect the hydraulic hoses to the pivot cylinder Instructions for transport Putting the machine into transport position The outer guard folding and cutter bar pivot occur simultaneously Instructions for work Putting the machine into work position The outer guard unfolding and cutter bar lowering occur simultaneously Available for...

Page 60: ...mower 58 GMD350 350 FF Optional equipment 3 Side deflector Kit no 1066150 The side deflectors enables mowing dense or down crops with long stems Fit the side deflector on the cutter bar right attachment 1 1 ...

Page 61: ...000 min 1 drive kit Kit no 1066170 Belt and pulley assembly for tractors with a pto speed of 1000 min 1 5 Adaptation parts Part no 56842400 Part no 80451046 This equipment enables coupling the machine to a U frame hitch coupler ISO 11001 1 Quick hitch ...

Page 62: ...ntil all moving parts have come to a standstill and apply park brake Maintenance intervals are indicated for normal conditions of use Every 50 hours Every 200 hours or at the end of the season Lubrication Grease The chassis tube The chassis lever When the following equipment is fitted Mechanical safety release Hydraulic pivot The cylinder crosshead 3 Oil The moving parts and pivot points 3 Oil cha...

Page 63: ...O shaft Primary PTO shaft Every 8 hours universal joints 1 Free wheel 4 Every 20 hours transmission tube 2 Every 40 hours guide rings 3 Lubricate with multi purpose grease grade NLGI 2 Place the machine in working position Stop the tractor engine and remove ignition key ...

Page 64: ...itted Mechanical safety release Hydraulic pivot The cylinder crosshead Grease the crosshead inside Loosen nut 1 to release lock 2 Grease the cylinder tube and sheath inner Fully push the cylinder in the sheath Check that lock is engaged on the nose Tighten nut 1 Basic adjustment L 95 mm 3 7 See section Machine safety 2 1 ...

Page 65: ...Maintenance and storage Disc mower GMD350 350 FF 63 The chassis lever 1 greaser Oil The moving parts and pivot points ...

Page 66: ...Disc mower 64 GMD350 350 FF Maintenance and storage The moving parts and pivot points ...

Page 67: ...n horizontal position The oil level must reach the lower edge of the emptying hole Clean and reinstall drain plug 2 Clean and reinstall the filler plug 1 Before draining oil operate the machine for a few minutes so that the oil warms up The angle gearbox is lubricated with 0 5 L 0 13 US gal of SPIRAX A extreme pressure oil for mechanical transmissions with viscosity grade SAE 80W90 and API grade G...

Page 68: ...intenance 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 Regularly check belt tension and in particular during the first hours of use Never replace belts individually Replace belts in full sets During the initial assembly or when installing a new set of belts give screw 1 2 additional turns to c...

Page 69: ...r engine Shift the mowing unit lift cylinder directional control valve in float position Open valve position a Release pressure until the gauge needle reads 0 When the pressure reaches 0 bar 0 psi bar on the pressure gauge close the valve position b Pressurizing the hydraulic circuit See section Pressurizing the hydraulic ground pressure circuit Before any work is carried out on a hydraulic circui...

Page 70: ...ng recommended oil quantity and quality Following all service operations or in case of an oil leak empty an refill cutterbar Before draining oil operate the machine for a few minutes so that the oil warms up The cutterbar is lubricated with 4 5 L 1 18 US gal of SPIRAX A extreme pressure gear oil with viscosity grade ASX 75W90 and API grade GL5 Never use an oil of viscosity SAE 90 in the cutterbar ...

Page 71: ...ain plug 1 and its seal Allow oil to drain completely Wait for dripping to stop Clean and reinstall drain plug 1 and its washer Replace if necessary Reinstall inner disc skid 2 Torque 12 daN m 89 lbs ft Operate the valve of the transport work position cylinder in the working position direction Pour the correct oil quantity and quality through the opening of the filler plug Clean and reinstall fill...

Page 72: ... Regularly check the oil level Place the cutterbar in horizontal position Remove drain plug 1 Check the oil level Top up if necessary Clean and reinstall drain plug 1 Replace it if necessary Check angle gearbox oil level The oil level must reach the lower edge of the emptying hole 1 ...

Page 73: ...es Very rough conditions can cause knives to crack and become deformed Worn knives Knife length C must exceed 65 mm 2 6 Knife width B measured at a distance A of 10 mm 0 4 from the disc edge must exceed 34 mm 1 4 The hole L for the securing bolt must not become oval by more than 20 mm 0 8 Immediately replace worn or damaged parts with genuine KUHN parts When the following equipment is fitted Knife...

Page 74: ...worn or inoperational When the bolt head wear reaches the center line of the bolt When diameter D of the bolt shoulder is less than 15 mm 0 6 After having been removed 5 times Replace nuts in the following cases When the contact washer has lost its elasticity When the contact washer loosens itself from the nut When nut wear reaches a 5 mm 0 2 After having been removed 5 times Check the condition o...

Page 75: ...ut to 12 daN m 89 lbf ft Dull knives require more horse power and have a negative effect on the cut quality Disc replacement Place a wooden wedge 2 between two discs to stop them from moving Remove 2 bolts 1 and their spring washers using the box spanner supplied with the machine Remove the disc conical cover Remove the 2 other nipple screws and their spring washers Remove the disc When remounting...

Page 76: ...aintenance and storage 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 56807100 ...

Page 77: ...g cases Damaged knives Very rough conditions can cause knives to crack and become deformed Worn knives Knife length C must exceed 65 mm 2 6 Knife width B measured at a distance A of 10 mm 0 4 from the disc edge must exceed 20 mm 0 78 The hole L for the securing bolt must not become oval by more than 22 mm 0 86 Always replace both knives per disc to avoid creating an out of balance force When the f...

Page 78: ...he fixing bolts should be changed in the following cases 2 When there is visible distortion When the locking compound is worn or inoperational When the bolt head wear reaches the center line of the bolt When diameter D of the bolt shoulder is less than 11 mm 0 43 See section Disc replacement The radial play between a worn bolt and a new knife must not exceed d 10 mm 0 4 ...

Page 79: ...n the following cases 3 When there is visible distortion When you have noticed important wear on a spring plate Width B of a spring plate measured at A 20 mm 0 8 must exceed 60 mm 2 4 Check the condition of the fixing elements regularly and also the torque of the knife fixing bolt Torque 12 daN m 89 lbf ft See section Spring plate replacement ...

Page 80: ...free spring plate from screw head 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 Replace immediately all worn or distorted knives Never straighten a bent knife Always replace both knives per disc Knife for disk rotating to the left Part no K6802970 Knife for d...

Page 81: ... knives require more horse power and have a negative effect on the cut quality Check that screw head 2 is free to slide in spring plate hole 3 Remove special tool Rotate disk by half a turn Repeat previous tasks Repeat previous tasks on the other disks Bolt Part no K6801011 Nut Part no 80201262 After replacing the last knife check that the tool has been removed and put away ...

Page 82: ... their conical washers Remove disc cover 1 Remove the disc 2 Replace worn or damaged disk with a new disk Reinstalling Refit the disc 2 Respect disc direction of rotation according to fitting of knives Make sure the arrow on the knife upper face is pointing in the disc s direction of rotation Reinstall disc cover 1 Respect an X of 90 between neighboring discs ...

Page 83: ...intenance and storage Disc mower GMD350 350 FF 81 Reinstall bolts 1 and their conical washers Position conical centre of washers at the top Torque bolts to 1 Torque 12 daN m 89 lbf ft Remove locking piece ...

Page 84: ...0 FF Maintenance and storage Check that there is a minimum play of 1 mm 0 04 between the spring plate and the cutter bar skids Otherwise position spacer s two maximum between the housing and the spring plate Part no 56807100 ...

Page 85: ...pring plate 1 Refit the disc See section Disc replacement Disc with cone Check torque of attachment bolts 1 of outer and inner cone covers 2 and 3 6 daN m 44 lbf ft Replace any lost or damaged cover 2 Part no 56803420 3 Part no 56803400 The replacement of the inner disc spring plate must be carried out by a Kuhn authorized dealer Spring plate Part no K6803410 ...

Page 86: ...ect and replace worn knives and bolts See section Inspection of knives and securing elements Release belt tension At the start of each season Re read the operators manual Inspect and replace worn knives and bolts See section Inspection of knives and securing elements Check that all nuts and bolts are sufficiently tightened Check belt tension Retension if necessary Check belt condition Replace them...

Page 87: ...rbar down pressure Adjust suspension hydraulic circuit Very wet working conditions Adjust main frame height with regards to the ground Bad ground contour adaptation Incorrect main frame setting Adjust main frame height with regards to the ground Excessive ground speed Reduce ground speed Hydraulic cylinder blocked Set hydraulic valve in floating position Incorrect mowing unit floatation Adjust sus...

Page 88: ...egards to the tractor when placed in working position The tractor valve double acting position has not been used to lower the mowing unit Use the tractor double acting position to lower the mowing unit When the following equipment is fitted Mechanical safety release Hydraulic pivot If the cutter bar pivots rearwards during the first headland turn manoeuvre The valve actuator is still engaged in th...

Page 89: ...by T kg Tractor unladen weight T1 kg Unladen load on tractor front axle T2 kg Empty load on tractor rear axle t kg Axle loads Tractor machine t1 kg Load on front axle Tractor machine t2 kg Load on rear axle Tractor machine M1 kg Total weight of front tool or front ballast M2 kg Total weight of rear tool or rear ballast a m Distance between the tools centre of gravity or the front ballast and the f...

Page 90: ...e required minimum front load is reached Indicate front axle calculated load value and the one indicated in the tractor operators manual T1 real M1 x a b T1 x b M2 x c d b 4 Calculation of the total weight M real If the rear tool M2 is lighter than the minimum load required at the rear minimum increase tool weight until the required minimum rear load is reached Indicate calculated total load value...

Page 91: ...nual Double value of the authorized capacity per tyre 2 tyres Minimum front rear ballasting kg Total weight kg kg Load on front axle kg kg kg Load on rear axle kg kg kg The minimum ballasting must be made by fitting a tool or an additional mass to the tractor The values obtained must be below or equal the authorized values ...

Page 92: ...weight M2 and the position of its centre of gravity d Tractor only T1 Load on front axle Tractor only T2 Load on rear axle Tractor only If the data required to calculate the total weight axle loads and minimum ballasting are not supplied use the following method ...

Page 93: ...Appendix Disc mower GMD350 350 FF 91 T Axle loads Tractor only ...

Page 94: ...xle loads Tractor machine Hopper empty Calculating the rear tool weight M2 M2 T t Calculating the distance d d b x T1 t1 M2 c If the total unit weight exceeds the tractor Gross Combined Weight Rating in accordance with the countrie s legislation empty the hopper to travel on public roads In any case we recommend to travel on public roads with empty hoppers and tanks ...

Page 95: ...Limited warranty Disc mower GMD350 350 FF 93 Limited warranty ...

Page 96: ...Disc mower 94 GMD350 350 FF Limited warranty ...

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