KUHN HR 5002 DR User manual

ASSEMBLY/OPERATOR'SMANUAL
HR 5002 DR / 6002 DR
HR 5002 DR - S / 6002 DR - S
POWER HARROWS
No 95404 E.GB - 03.1999

DEAR OWNER,
In buying a KUHN machine you have chosen wisely. Into it have gone years of thought,
researchandimprovements.Youwillfind,ashavethousandsofownersallovertheworld,that
you have the best that engineering skill and actual field testing can produce. You have
purchased a dependable machine, but only by proper care and operation can you expect to
receive the performance and long service built into it.
This manual contains all the necessary information for you to receive full efficiency from your
machine.Theperformanceyougetfromthismachineislargelydependantuponhowwellyou
readandunderstandthismanualandapplythisknowledge.PleaseDONOTASSUMETHAT
YOU KNOW HOW TO OPERATE AND MAINTAIN YOUR MACHINE before reading this
manual carefully. KEEP THIS MANUAL AVAILABLE FOR REFERENCE.
YourKUHN dealerwillinstruct youonthegeneral operationofyourmachine. Heisinterested
that you get the best performance possible and will be glad to answer any special questions
that may arise regarding the operation of the KUHN 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 necessary replacements.
When ordering service parts it is important that you indicate the type of machine concerned
and its serial number.
Forthisreasonpleasecompletethemodelidentificationplatediagrambelowwiththerequired
information. This will provide you with an easy reference for future service parts orders.
ABOUT IMPROVEMENTS
KUHN iscontinuallystriving to improveitsproducts and,therefore,reserves the righttomake
improvements or changes when it becomes practical to do so, without incurring any
obligations to make changes or additions to the equipment sold previously.

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CONTENTS
Page
Safety 2
Safetydecals 8
Technicalspecifications 10
Signallingelements 11
Fitting to the tractor 12
PrimaryPTOdriveshaft 13
WALTERSCHEIDcutoutclutch 15
Rotorspeed(rotationalfrequency) 16
Rollers 17
Sidedeflectors 21
Soillooseningshare 22
Rearlevellingshare 22
Transport 23
Workingposition 24
Parkingthemachine 25
Operation 26
Optionalaccessories 27
1.Levellingbars 27
2. Wheel track eradicators 28
3.Three pointhydraulicliftforadditionalimplements 29
4. Set of pinions 31
5.Blades withouthard coating 31
6.Longpotatoblades 32
7.Hardcoatedpackerrollerscrapers 32
8.Nylon cleaning platesforpacker roller scrapers 32
9. PTO shafts 32
Maintenance 33
Troubleshooting 37
Limitedwarranty 39
Copyright1999 KUHN S.A.

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SAFETY ADVICE
Thesymbolaboveisusedthroughoutthismanualeverytimerecommendationsaremadeconcerningyoursafety,
the safety of others, or the good operation of the machine.
Theserecommendationsmustbemadeknown to all machine operators.
DESIGNATED USE OF THE MACHINE
TheHR5002DR/5002DR - S / 6002 DR / 6002 DR - S PowerHarrowsmustonlybeusedfortheworkforwhich
theyhavebeendesigned:secondarycultivationandseedbedpreparation.
Themanufacturerisnotheldliableforanydamageresultingfrommachineapplicationsotherthanthosespecified
bythemanufacturer.
Any use other than the designated operation is at the risk and responsibility of the operator.
Designated use of the machine also means :
-followingoperation,maintenanceandrepairrecommendationsgivenbythemanufacturer;
-using only genuinespare parts, equipmentand accessories asdesignated by themanufacturer.
The HR 5002 DR / 5002 DR - S / 6002 DR / 6002 DR - S PowerHarrows must only beoperated, maintained and
repairedbycompetent personswhoarefamiliarwithmachine specificationsandoperationandareaware ofany
dangerinvolved.
Theoperatormustimperativelyrespectcurrentlegislationconcerning:
-accidentprevention,
- work safety,
-public traffic circulation.
All safety advice indicated on the machine must be strictly observed.
Themanufacturerisnotheldliableforanydamageresultingfrommachinemodificationscarriedoutbytheoperator
himselforbyathirdpartywithoutpreviouswrittenagreementfromthemanufacturer.

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GENERAL SAFETY RECOMMENDATIONS
Before operating the machine, always ensure that tractor and machine are in accordance with work safety and
road traffic regulations.
BASIC PRINCIPLES
1. In addition to the recommendations given in this manual, legislation on work safety and accident prevention
must also be respected.
2. Advice is indicated on the machine, specifying safety recommendations in order to prevent accidents.
3. Before travelling on public roads, the operator must ensure that the machine conforms to road traffic
regulations.
4. Before starting work, the operator must be familiar with all machine controls, handling devices and their
functions. Once at work, it is too late to do so !
5. Do not wear loose clothing which could become caught up in moving elements.
6. Useatractorequippedwithasafety cab. Keep windows and roof hatchclosedforreducedsoundlevelwhile
operating the PTO driven implement.
7. Beforestarting upthemachineand beginningwork,checkthesurroundingarea(bewareofchildren!).Make
sure there is sufficient visibility.
Keep all people and animals away from the danger zone of the machine (risk of projection !)
8. Carrying people or animals on the machine when working or in transport is strictly forbidden.
9. Machine must only be attached to tractor using means provided and in accordance with current safety
standards.
10. Special care should be taken when attaching or removing the machine from the tractor.
11. Before attaching the machine, ensure that the front tractor axle is sufficiently ballasted.
Ballast is to be placed on the supports provided in accordance with instructions of the tractor manufacturer.
12. Do not surpass the maximum axle load or the overall transport weight as prescribed by the tractor
manufacturer.
13. Beforetransportingthemachineonpublicroads,ensurethatalllegallyrequiredguardsandindicators(lights,
reflectors ...) are in place and in good operation.
14. All operating controls (cords, cables, rods...) must be positioned so that they cannot be set off accidently,
risking accident or damage.
15. Beforetransportonpublicroads, locatethemachineintoitstransport positionasinstructedinthisoperator’s
manual.
16. Never leave the tractor seat while the machine is operating.

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ATTACHMENT
1. Whenattachingorremovingthemachinefromthetractor,positionhydraulicliftcontrolleverinsuchawaythat
it cannot be set off accidentally.
2. When attaching the machine to tractor hydraulic linkage, ensure that diameter of link pins corresponds to
diameter of ball joints.
3. WARNING ! Danger of crushing and shearing can exist in the lifting zone of the tractor hydraulic linkage !
4. Donotstandbetweenthetractorandthemachinewhenoperatingtheoutercontrolleveroftheliftmechanism.
5. In transport, the machine lift mechanism should be stabilized by tractor tie rods to avoid floatation and side
shifting.
6. When transporting the machine in the raised position, lock the hydraulic lift control lever in place.
17. Drive speed must be adapted to ground conditions as well as roads and paths.
Always avoid abrupt changes of direction.
18. Precision steering, tractor adherence, road holding and efficient braking are influenced by the type of
implement, weight, ballast of front axle, ground or road conditions. It is therefore of utmost importance to be
cautious in every given situation.
19. Be particularly cautious when turning corners, paying attention to machine overhang, length, height and
weight.
20. Beforeoperating the machine, ensurethatallsafetyguardsarefirmlyinplace and in good condition.Ifworn
or damaged, replace immediately.
21. Beforeoperatingthemachine,checktightnessofnutsandbolts,particularlyonfixingelements(blades,tines,
knives, spades ...)
22. Keep clear of the machine operating area.
23. WARNING ! Danger of crushing and shearing can exist when components are operated by hydraulic or
pneumatic controls.
24. Beforeleavingthetractororbeforeadjusting,maintainingorrepairingthemachine,turnofftheengine,remove
ignition key and wait until all moving parts have come to a complete stop.
25. Donotstandbetweenthetractorandthemachineunlessthehandbrakeistightand/orstopshavebeenplaced
under the wheels.
26. Before any adjustments, maintenance or repairs are carried out, ensure that the machine cannot be started
up accidentally.

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POWERTAKE-OFF
1. OnlyusePTO shaft supplied withthemachineorrecommended by the manufacturer.
2. PTO guards must always be in place and in good condition.
3. Checkforcorrect PTOoverlapwhenatworkand intransport.
4. BeforeattachingorremovingthePTOshaft,disengagePTOshaft,turnoffengineandremoveignitionkey.
5. IfaprimaryPTOshaftisequippedwithaslipclutchorafreewheel,thesemustbefittedonthemachinePTO.
6. Ensure that PTO shaft is always correctly fitted and locked into place.
7. Make sure guards are correctly in place and secured with the safety chains provided.
8. BeforeengagingPTO,ensurethatPTOspeed(rotationalfrequency)anddirectionofrotationareinaccordance
withmanufacturersrecommendations.
9. BeforeengagingPTO, keepallpeopleandanimalsclearfrom themachine.
10. NeverengagePTOshaftwhentractorengineisturnedoff.
11. NeversurpassPTOanglerecommendedbythemanufacturer.
12. WARNING!RotatingelementscancontinueturningmomentarilyafterPTOisdisengaged.Keepclearuntilall
rotating elements are at a standstill.
13. Whenremovingthemachine,locatePTOshaftonthesupportsprovided.
14. Fit safety cap on tractor PTO.
15. ReplaceanywornordamagedPTOguardsimmediately.
Rotationspeed ... rpm(American Measure) isalsoexpressed in metricmeasure :Rotationalfrequency ... min-1.
Bothunitsareequivalent,forexample: Rotation speed 540 rpm equals Rotationalfrequency 540 min-1.

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HYDRAULICSYSTEM
1. WARNING ! Hydraulic systemis under pressure (maximum working pressure :200 bars/2900 psi).
2. When fitting hydraulic motors or cylinders, ensure that connections have been made correctly, as per
manufacturer’sinstructions.
3. Before connecting hoses to the tractor hydraulics, ensure that tractor and machine circuits are not under
pressure.
4. Itisstronglyrecommendedthattheoperatormarksthehydraulicconnectionsbetweentractorandmachineto
avoid making a wrong connection. WARNING ! Functions could be reversed (for example : lift/lower).
5. Regularly check the hydraulic hoses ! Replace the hydraulic hoses every 5 years. Damaged or worn hoses
mustimmediately be replaced.
Whenreplacingthehydraulichoses,makesuretousehoseswiththespecificationsandqualityrecommended
by the manufacturer of the machine.
6. Should a leak be found, take all necessary precautions to avoid accidents.
7. Any liquid under pressure (particularly oil from hydraulics) can penetrate the skin and cause severe injury. If
injured, see a doctor immediately, there could be danger of infection.
8. Before any adjustments, maintenance or repairs are carried out, lower the machine, depressurize the circuit,
turn off the engine and remove ignition key.
MAINTENANCE
1. Before checking any machine malfunction and before adjusting, maintaining or repairing the machine,
disengage PTO, turn off engine and remove ignition key.
2. Check tightness of nuts and bolts regularly. Retighten if necessary.
3. If the machine is raised, prop it up in a stable position before carrying out any maintenance work.
4. When replacing a working part, wear protection gloves and only use standardized tools.
5. Itisforbiddentodiscardanyoil,greaseorfilters.Thesemustbegiventowastedisposalorganisationstoprotect
theenvironment.
6. Disconnect power source before any work is done on the electric system.
7. Check safety guards regularly, particularly those that are subject to wear. Replace immediately if damaged.
8. Spare parts used must be in accordance with specifications and standards as defined by the manufacturer.
Use only genuine KUHN parts !
9. Before any electric welding is carried out on tractor or attached machine, disconnect generator and battery
terminals.
10. Repairs on elements under pressure or tension (springs, accumulators etc...) must only be carried out by
competentpersonswithstandardizedequipment.

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SPECIALSAFETYRECOMMENDATIONS
Totaltransportheightofthemachinemeasuredfrom the ground must not exceed 4m(maximumheightallowed
by the highway code).
ROADTRANSPORT
Dimensions
Depending upon the machine’s dimensions, the user should check with the relevant authority that it can be
transported legally on public roads.
Ifmaximumauthorisedsizeisexceeded,theusershouldactaccordingtothelegislationinforceregardingtransport
ofoversizeequipment.
Load per axle and gross weight
When transporting the machine or combined machines, check that :
- thetractor’s authorised grossweight as wellasthe maximum weightper axle isnotexceeded.
- In all circumstances, the weight on the tractor’s front axle is never below 20% of the tractor’s unladen weight.
If the case arises, fit front ballast weights.

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SAFETY DECALS
THEFOLLOWINGSAFETYPICTORIALSHAVEBEENPLACEDON YOUR MACHINE IN THE AREAS
INDICATED.THEYAREINTENDEDFORYOURPERSONALSAFETYANDFORTHESAFETYOFTHE
PEOPLE WORKING WITH YOU. THE TEXT SHOWN ON THEM GIVES THEIR PRECISE MEANING.
KEEP THE PICTORIALS LEGIBLE. IF THEY ARE NOT, REPLACE THEM.

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SPECIFICATIONS
Technical specifications HR 5002 DR HR 6002 DR
HR 5002 DR - S*HR 6002 DR - S*
Workingwidth m / ft 5.00 / 16'5" 6.00 / 19' 8"
Max. allowable DIN power kW / hp 206 / 280
Min.powerrequirement kW / hp 96 / 130 110 / 150
PTOspeed(rotationalfrequency) rpm(min-1)1000
Numberofrotors 16 20
right 16 20
Numberoftines left 16 20
Working depth adjustable min. / max. mm / in. 50 / 2" - 230 / 9"
Workingdepthcontrol withrearrollers
Tractorattachment Cat. 3 - with floating lower links
PrimaryP.T.O. shaft withouttorquelimiter
SecondaryP.T.O.shafts with cut out clutch
Totalwidth(machineunfolded) m / ft 5.25 / 17'3" 6.21 / 20'4"
Transportwidth m / ft 2.48 / 8' 2" with the rollers
intheupwardposition
Height(machinefolded,frontshareloweredin
workingposition) m / ft 3.10 / 10'2" 3.60 /11'10"
Lockingintransport position mechanicalandhydraulical
Workingposition rigidorfloating
(freetravel+/- 100mm)
Totalweightwithmaxicrumblerroller kg / lbs - 2810 / 6182
Totalweightwithpackerroller kg / lbs 2825 / 6215 3130 / 6886
Totalweightwithmaxipackerroller kg / lbs 2895 / 6369 3200 / 7040
Hydraulic outlet required 1xdoubleactingoutlet
Electric connection required 1 x 7 pin plug
*NOTE:The suffix“ S ”designatesmachinesequipped withquickreleasebladeattachmentFAST-FIT.

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SIGNALLING ELEMENTS
Fix the support (1) of the preassembled signalling
panelsontheframeof themachinewith4hexagonal
screws(2)(M10x100),4self-lockingnuts(M10)and
2flat ironbars (3) (photo1).
Fixthewiringharnessonthemachineframewiththe
supplied clamp collars.

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FITTING TO THE TRACTOR
ThepowerharrowHR5002DR-6002
DR must always rest on the soil with
the2half-harrowsunfolded(photo3).
The HR 5002 DR - 6002 DR can be attached to all
tractorsequippedwith a Cat.3three-pointlinkage.
Theindependentlyfloatinglowerlinks(C)facilitatethis
operation.
Thelowerlinkarms(I)aretobeattachedtotheinside
oftheadjustablelowerattachmentyokes(C)bymeans
of Ø 37 hitch pins (photo 4).
Thetop link (P) is tobe attached inone of the4 holes
ofthe3pointframebymeansofaØ31hitchpin (photo
4).
- Connect the 2 hydraulic hoses (F) to the tractor
doubleactingoutlet(photo4).
- The electrical plug (E) is to be connected to the
tractor 7 pin socket (photo 4).

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P.T.O. DRIVE SHAFT
Makesuretherotaryharrowisrestingonthegroundandismaintainedinastablepositionwiththerollers.Install
thePTOshaftmakingsurethat the clamp yoke is onthemachineend.TightenbothM16 bolts to 22 daNm / 160
ft.lbs. Tightness has to be checked regularly.
Aftermountingtherotaryharrow,stabilizethetractor3-pointlinkagewithwhatevermeansarerecommendedi.e.
the bars, chains, etc.
Be sure the tractor P.T.O. shaft drive is disengaged and stop engine.
Couple the P.T.O. shaft to the tractor P.T.O stub.
Attachment is correct when machine is horizontal in work position.
Withthemachinerestingontheground,adjustthetoplink(P)lengthtoapositionwherethetractorPTOstuband
the tiller input shaft are parallel.
In working position :
- The 2 angles (K) formed by the centre lines of the yoke and the sliding tubes must be equal and not exceed a
combined angle of 30° when working.
- The sliding tube overlap (L) must be at least 22 cm (8.5") (fig. 5).
With the machine fully raised on the tractor hydraulic linkage :
- The2slidingtubesmustnotcompletelyoverlapeach other ; a gap (M) of 1 cm (3/8") shouldexistbetweenend
of sliding tube and yoke.
- BothU joints (K)should operate approximately at the samebent angles whichmust never exceed40° (fig. 5).
Should the above mentioned conditions not exist :
- Shorten both tubes by an equal length, chamfer edges and grease liberally before refitting.
- ToavoidnoisyrunningofthePTOshaftwhenliftingthemachineoutofwork,attachtoplink(P)sothatitisalmost
parallel to the lower links (I) (fig. 5).
Important : Always disconnect the tractor PTO drive before lifting the machine into the transport position,
otherwise permanent damage can be caused to the transmission shaft.
Repeat these adjustments each time the machine is mounted to a different tractor.

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To avoid accidents which could be
serious, make sure that the guards
are always correctly in place and
secured with the safety chains. The
safety chain on the machine side
must be attached in the hole pro-
vided in the metal guard of the cen-
tral gearbox (see figure 6). All worn
ordamagedguardsmustbereplaced
immediately.
After detaching the power harrow, the PTO shaft (T)
should be positioned in support (C) to avoid ground
contactwhichcouldresultinprematurefailuredueto
contamination with dirt and dust (photo 7).

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WALTERSCHEID CAM TYPE SAFETY CLUTCH
Each side bevel gearbox is fitted with a Walterscheid cam type safety clutch as standard.
Theseadjustablesafetyclutchesarebasedontheprincipleofdisengagingcams.Theyareactivatedwhenthere
isanoverloadanddisengagethedriveofthemachine.Theyarefactoryadjustedtoamaximumtractorpowerof 206
kW(280DIN hp)andforaPTO speed(rotationalfrequency)of 1000rpm (min-1).
After a torque cut-out, it is important to disengage the PTO drive and lift the machine out
ofwork.Reengage the PTO drive when the causeforthecut-out has been eliminated and
the clutches will automatically re-engage.
If a foreign object has become jammed between the rotors, switch off the tractor engine,
remove the ignition key, and then clear the machine.
NOTE: Avoidre-engagingthecut-outclutchesbysimplyreducingthePTOspeed(rotationalfrequency)
asthiswillcausepremature wear of the clutch cams due to friction between thecamsandtheir
housing.

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Position of 21 24 19 26 17 28
gearwheels
24 21 26 19 28 17
1000rpm(min-1)*234 306 196 366 162 441
Standard Optional
17/28teeth
(Set No 123 7650)
Optional
19/26teeth
(Set No 123 7420)
*
P.T.O.
rpm(min-1)
Rotorspeed(rotationalfrequency)
Set of gearwheels
* Factory pre-set
ROTOR SPEED (ROTATIONAL FREQUENCY)
TheHR5002DR/6002DR/5002DR-S/6002DR-Smustonlybedrivenat a PTOspeed(rotationalfrequency)
of1000rpm(min-1).AllgearboxesarefactoryfittedwitharearPTOshaftwhichrotatesatthesamespeed(rotational
frequency) as the tractor PTO shaft. An extra implement can be driven by a secondary PTO shaft which should
be assembled and used according to the legislation in force at the time.
RemovethePTOshaftcover(3) andmounttheplasticguardcone(4)(code58707010)suppliedwiththemachine
(photo 8 A).
The rear PTO shafts are 1 3/8" 6 spline profile, and must not be used to transmit more than 37 kW (50 hp).
If the rear PTO shafts are not used, always put cover (3) in place (photos 8 and 8 B).
Toinvert thepinions,positionthemachinehorizontally.
Remove the covers (1) from the side gearboxes by
removingthe4screws(2)andpullingtowardstherear
(photo8).
Invertthepinions.
8A
8
8B

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ROLLERS
According to the user’s choice, the rotary power harrows can be equipped with :
- either 2 maxicrumbler rollers (with welded tubes) (only for HR 6002 DR / 6002 DR - S),
- either 2 packer rollers (rows of continuous studs welded on a cylinder),
- or 2 maxipacker rollers (rows of discontinuous studs welded on a large diameter cylinder).
.
The roller is an essential element of the harrow and has four main functions :
- to set and control the working depth of the machine,
- to pack the tilth evenly behind the rotors to create an optimum seedbed,
- to increase seedbed crumbling and clod break-up,
The roller is also used as a protection device at the rear of the machine. It must never be
removed.
Toraisetherollercompletelyoutofworktoreduceforexamplethetransportwidthwhenthemachineisfolded,lift
the roller, then place pin (T) in hole (O) (photo 9).
-toimproveseedbedlevelling.
The roller can be adjusted horizontally in 2 different
positions(E)and(E’)(photo9).Position(E’)mustbe
used when a levelling bar is fitted to the rear of the
trough (see page 27, photo 25).
Therollerheightisadjustedat(P)(photo9).Toadjust,
proceed as follows :
- Lift the machine behind the tractor,
- Place pin (T) in the hole corresponding to the
requiredheight(photo9).Makesurethat thesame
hole is used on each side of the half-machines.
1) MAXICRUMBLER ROLLER (photo9A)
HR 6002 DR / 6002 DR - S :
Code 120 9150, qty. 2
Themaxicrumblerrollerisidealfordryorslightlyhumid
conditions.It is made upof fixed tubes (F)welded on
round support rings (photo 9 A).
9
F
9A

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2) PACKER ROLLER
HR 5002 DR / 5002 DR - S : Code 123 6720, quantity 2
HR 6002 DR / 6002 DR - S : Code 123 6730, quantity 2
Thisrollerisparticularlyintendedforuseinwetorstickysoils.Efficientpacking,properlevellingandgoodcrumbling
are achieved.
The scraper bar forms an integral part of the roller packer.
These scrapers, placed between the rows of studs, ensure that the roller is cleaned.
a) Installing packer rollers and scrapers (photos 10 and 11)
Whenfittingtherollers,besuretochecktheirdirectionofrotation(seearrowonphoto10).(Thedirectionofrotation
is also indicated by a sticker on the side of the roller).
Fittherollersandscrapersupports(D)tothe2arms(B),usingtheguidehousingandthe8bolts(U).Thenfitscraper
supporting bar (H) onto the 2 support arms (D) with the 4 bolts (R). Check that all the scraper plates (P) are fully
retracted (towards the rear). Fit the 2 adjusters (Q) photo 11).
Usingthe2nuts(S)ontheadjusters,pivotthescraperbartowardstherolleruntilitisalmostbottomed-outinthe
2 slots (photo 11). Then tighten the 4 bolts (R) to a torque of 22 daNm / 160 ft.lbs, and adjust the scraper plates
(P) as described thereafter.
b) Adjusting the scraper plates
- Slightly loosen the fixing bolts (V) of the scrapers (P) so that they slide freely (photo 10).
- Checkthattheirpositioniscentralrelativetotherowsofrollerteeth.Thescrapersupportshaveslottedholesto
allowreadjustmentifnecessary.
- Aftercheckingthatthescraperbarisinitsfurthestforward position(photo11),positionthescraperplatesone
atatimesothattheyareincontactwiththeroller.Retightenbolts(V)(torque6daNm/44ft.lbs)(photo10).Check
that the scrapers only lightly touch the roller, and do not interfere with its rotation.
If hard coated scrapers are used ensure that the coating is towards the front and downwards.
c) Cleaning the scrapers
Incaseofcropresiduebuild-up,itis recommended for cleaning that the scrapersarepivotedbackwardsaround
the2upperboltholes(R)(photo10).Todothis,removethe2lowerbolts(R)andreleasethe2adjusters(Q)after
loosening their self-locking nuts (S) (photo 11).
To ease pivoting of the scraper bar towards the rear, use a lever in holes (L) (photos 10 and 11) placed at each
side of the scraper bar (H).