KUHN EL 92 User manual

ASSEMBLY / OPERATOR'S MANUAL
EL 92
POWER TILLER
N° 95465 A.GB - 05.2003

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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TABLE OF CONTENTS
PAGE
Safety 2
SafetyDecals - Modelidentificationplate 8
TechnicalSpecifications 10
Guards 11
Fitting to the tractor 12
PTOshaft 15
Slip clutch 17
Rotorspeeds(rotationalfrequencies) 18
Adjustmentoftherearhood 19
Use 20
Completionequipment 21
1) Skids + stand 21
2)Frontwheels 22
3)Rollers 23
Optionalequipment 27
1) Side separating discs 27
2)Trackeradicators 28
3)Nyloncleaningplatesforpackerrollerscrapers 29
4) P.T.O. shafts 29
5)L-blades 29
6) Set of pinions 21/25 teeth 29
7)Signallingelements 30
Maintenance 32
1)Lubrication 32
2)Fitting blades 33
TroubleShooting 35
ConditionsofLimitedWarranty 38
Copyright2003 KUHN S.A.

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SAFETY
Theabovesymbolisusedthroughoutthismanualeverytimerecommendationsaremadeconcerningyoursafety,
the safety of others, or the good operation of the machine.
Theserecommendations must be made known to allmachineoperators.
DESIGNATED USE OF THE MACHINE
The EL 92 must only be used for the work for which they have been designed :
- Marketgardening
- Fornurseries,landscapingandhorticulture.
- Maintenanceofprivateorpublicgreenspaces
- Seedbedpreparationinprimaryorsecondarytillage
- Vineyard work.
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.
TheEL 92mustonlybeoperated,maintainedandrepairedbycompetentpersonswhoarefamiliarwithmachine
specificationsandoperationsandareawareofanydangerinvolved.
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
Beforeoperatingthemachine,alwaysensurethattractorandmachineareinaccordancewithworksafetyandroad
trafficregulations.
BASICPRINCIPLES
1. Inadditiontotherecommendationsgiveninthismanual,legislationonworksafetyandaccidentprevention
must also be respected.
2. Adviceis indicated onthe machine, specifying safetyrecommendations in order toprevent accidents.
3. Beforetravellingonpublicroads,theoperatormustensurethatthemachineconformstoroadtrafficregulations.
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. Useatractorequippedwithasafetycab.Keepwindowsandroofhatchclosedforreducedsoundlevelwhile
operatingthePTOdrivenimplement.
6. Beforestartingupthemachineandbeginningwork,checkthesurroundingarea(bewareofchildren!).Make
sure there is sufficient visibility.
Keepall people andanimals away fromthedanger zone ofthe machine (riskof projection !)
7. Carryingpeople oranimals on themachinewhen working orin transport isstrictly forbidden.
8. Machine must only be attached to tractor using means provided and in accordance with current safety
standards.
9. Specialcare should betaken whenattachingorremoving the machinefrom thetractor.
10. Before attaching the machine, ensure that the front tractor axle is sufficiently ballasted.
Ballastis to beplacedonthesupportsprovidedin accordance with instructionsofthetractormanufacturer.
11. Donotsurpassthemaximumaxleloadortheoveralltransportweightasprescribedbythetractormanufacturer.
12. Do not surpassthemaximum transport widthauthorizedby road trafficregulations.
13. Beforetransportingthemachineonpublicroads,ensurethatalllegallyrequiredguardsandindicators(lights,
reflectors...) arein place andin good operation.
14. All operating controls (cords, cables, rods...) must be positioned so that they cannot be set off accidently,
riskingaccidentor damage.
15. Before transporting on public roads, locate the machine into its transport position as instructed in this
operator’smanual.
16. Neverleavethetractorseatwhilethe machineisoperating.

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17. Drive speed must be adapted to ground conditions as well as roads and paths.
Alwaysavoidabruptchangesofdirection.
18. Precision steering, tractor adherence, road holding and efficient braking are influenced by the type of
implement,weight,ballastoffrontaxle,groundorroadconditions.Itisthereforeofutmostimportancetobe
cautiousineverygivensituation.
19. Beparticularlycautiouswhenturningcorners,payingattentiontomachineoverhang,length,heightandweight.
20.Keepclearofthemachineoperatingarea.
21. WARNING ! Danger of crushing and shearing can exist when components are operated by hydraulic or
pneumaticcontrols.
22. Beforeleavingthetractororbeforeadjusting,maintainingorrepairingthemachine,turnofftheengine,remove
ignition key and wait until all moving parts have come to a complete stop.
23. Donotstandbetweenthetractorandthemachineunlessthehandbrakeistightand/orstopshavebeenplaced
underthewheels.
24. Beforeanyadjustments,maintenanceorrepairsarecarriedout,ensurethatthemachinecannotbestarted
up accidentally.
PRECAUTIONSTOBETAKENBEFOREOPERATINGTHEMACHINE
1. Donot wearloose clothing whichcould becomecaught up inmoving elements.
2. Wear the individual protection equipment corresponding to the work which is planned (gloves, shoes, eye
protection,helmet,earprotectors...).
3. All operating controls (cords, cables, rods ...) must be positioned so that they cannot be set off accidentally,
causingaccident ordamage.
4. Before operating the machine, check the tightness of all nuts and bolts, particularly on rotating parts (blades,
tines, knives, spades ...)
5. Beforeoperatingthemachine, ensurethatallsafetyguardsarefirmlyinplaceandingoodcondition.Ifwornor
damaged,replaceimmediately.
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
diameterof balljoints.
3. WARNING ! Danger of crushing and shearing can exist in the lifting zone of the tractor hydraulic linkage !
4. Donotstandbetweenthetractorandthemachinewhenoperatingtheoutercontrolleveroftheliftmechanism.
5. Intransport,themachineliftmechanismshouldbestabilizedbytractortierodstoavoidfloatationandsideshifting.
6. When transporting machine ensure that it can not be lowered accidentally.

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POWERTAKE-OFF
1. Useonly the PTOshaft supplied with themachine or recommendedbythe manufacturer.
2. PTO guards must always be in place and in good condition.
3. Checkforcorrect PTOoverlapwhenatworkandintransport.
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. Before engaging PTO, ensure that PTO speed (rotational frequency) and direction are in accordance with
manufacturer'srecommendations.
9. BeforeengagingPTO, keepallpeopleandanimals clear fromthemachine.
10. NeverengagePTOshaftwhentractorengineisturnedoff.
11. NeversurpassthePTOanglerecommendedbythemanufacturer.
12. WARNING!RotatingelementscancontinueturningmomentarilyafterPTOisdisengaged.Keepclearuntilall
rotating elements are at a standstill.
13. Whenremovingthemachine,placePTOshaftonthesupportsprovided.
14. Fit the safety cap on tractor PTO.
15. ReplaceanywornordamagedPTOguardsimmediately.
Rotation speed ... rpm (American Measure) is also expressed in metric measure : Rotational frequency ... min-1.
Both unitsare equivalent,for example: Rotationspeed 540rpm equals Rotationalfrequency 540 min-1.

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MAINTENANCE
1. Before checking for any machine malfunction and before adjusting, maintaining or repairing the machine,
disengagePTO,turnoffengineandremoveignitionkey.
2. Check nut and bolt tightness regularly. Retighten if necessary.
3. If the machine is raised, prop it up in a stable position before carrying out any maintenance work.
4. Whenreplacing a working part, wearprotection gloves and use only standardizedtools.
5. Itisforbiddentodiscardanyoil,greaseorfilters.Thesemustbegiventowastedisposalorganisationstoprotect
theenvironment.
6. Disconnect power source before any work is done to the electric system.
7. Checksafetyguards regularly, particularlythose that aresubject to wear.Replaceimmediately if damaged.
8. Sparepartsusedmustbeinaccordancewithspecificationsandstandardsasdefinedbythemanufacturer.Use
onlygenuineKUHNparts!
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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- N o t e s -

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The following safety pictorials have been placed on your machine in the areas indicated. They
are intented for your personal safety and for the safety of the people working with you. The text
shown on them gives their precise meaning. Keep the pictorials clean. Replace them when they
are faded.
SAFETY DECALS
MODEL IDENTIFICATION PLATE

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1
2
3
4
7
6
5

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TECHNICAL SPECIFICATIONS
SPECIFICATIONS EL 92 EL 92 EL 92
180 205 230
Workingwidth cm (") 180(5'11") 205(6'9") 230(7'6")
Maximum tractor DIN power kW (hp) 70(95)
Minimumpowerrequirement kW (hp) 33(45) 38(51) 43(58)
P.T.O.speed(rotationalfrequency) rpm(min-1)540
Rotorspeeds rpm(min-1)194/230(standard) or 178 / 252(optional)
Rotordiameter mm (") 525(1'9")
Numberofblades(3pairformation) 42 48 54
Working depth adjustable min. / max. mm (") 50 / 230 (2" / 9")
Workingdepthcontrolwith skids or roller
gaugewheels
P.T.O.shaft with friction slip clutch
Machine can be offset to the right by sliding yokes mm (") 110(4") - -
Attachment 1 and 2
Overallwidth:
-workingposition(sideguardslowered) cm (") 217(7'1") 250(8'2") 276(9'1")
-transportposition(sideguardsraised) cm (") 197(6'5") 230(7'6") 255(8'4")
Weight with skids + parking stand (with PTO shaft) kg(lbs) 525(1155) 570(1254) 605(1331)
Weightwith gaugewheels (withPTOshaft) kg (lbs) 525(1155) 570(1254) 605(1331)
Weightwith standardpacker roller(with PTOshaft) kg (lbs) - 830(1826) 895(1969)
Weight withcrumblerroller (with PTOshaft) kg (lbs) - 685(1507) 725(1595)

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Thesafetyguardsincreasethesafetyofthemachine.
Thefrontguardsconsist of2telescopicelements,one
fixed (A) and the other sliding (B).
Theguard’sslidingpart(B)mayhavetobeadjustedto
adaptthe machine to the tractor3-point lift category.
Whatever the accessories the machine is equipped
with, the guards must remain fixed and cover the
whole length of the machine from the outside of the
adjustablelower link brackets.
GUARDS
1) Front safety guards (photo 1)
2) Side safety guards (photos 2 and 3)
To reduce the machine width for road transport, proceed as follows :
-loosen the screws(C) ofguards (D),
-pivotguards(D)upwards,
- tighten screws (C).
Side guards (D) are safety elements, they must always be folded downwards at work
(photo3).
1
3
2

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FITTING TO THE TRACTOR
1) The EL 92 with a working width of 180 has 2 lower attachment yokes adjustable in span.
6
CATEGORY "1" LINKAGE
5
The EL 92 model 180 has two adjustment settings giving the following attachment possibilities :
Theattachmentismadebyslidingthelowerhitchpin
yokes(A)onthefronttube(T)(photo5).Thentighten
bolts(E)onhitchpinyokes(A)to21daNm/155ft.lbs
(photo5).

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CATEGORY "2" LINKAGE
7
2) The EL 92 models 205 - 230 have 2 lower attachment yokes adjustable in span.
Tochangethepositionoftheloweryokes(A),proceed
as follows :
- removebolts(E)(photo8),
- position yokes (A) in front of the chosen holes (T)
(photo8),
- reinstall bolts (E) and torque to 21 daNm/155 ft.lbs
beginningwiththeupperbolt.
8

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CATEGORY "1" LINKAGE
The EL 92 models 205 - 230 havetwo adjustment settingsgiving thefollowing attachment possibilities:
10
9
CATEGORY "2" LINKAGE

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P.T.O. DRIVE SHAFT
MakesuretheEL92isrestingonthegroundandismaintainedinastableposition.Cleanandlubricatethegearbox
inputshaftandslidethematingPTOshaftyoke in place. Before attaching the PTO shaftto the slip clutch flange,
it is essential that both mating surfaces are thoroughly cleaned.
Bringbothcomponentstogetherandfixinplaceusingthe self-lockingscrewsprovided.Tighten allthestudsto a
torque setting of 10 daNm (75 ft.lbs) at the same time making sure that the flange is centrally seated.Tightness
has to be checked regularly.
AftermountingtheEL92,stabilizethetractor3-pointlinkagewithwhatevermeansarerecommendedi.e.thebars,
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. 11).
With the machine fully raised on the tractor hydraulic linkage :
- The2 sliding tubes must not completely overlap each other ; agap(M)of1cm(3/8")shouldexistbetweenend
of sliding tube and yoke.
- Both U joints (K) should operate approximately at the same bent angles which must never exceed 40°
(fig.11).
Should the above mentioned conditions not exist :
- Shortenbothtubes by anequallength (fig. A andB),chamfer edges (fig. C)andgrease liberally (fig.D) before
refitting.
- ToavoidnoisyrunningofthePTOshaftwhenliftingthemachineoutofwork,attachtoplink(P)sothatitisalmost
parallel to the lower links (fig. 11).
Important : AlwaysdisconnectthetractorPTOdrivebeforeliftingthemachineintothetransportposition,otherwise
permanent damage can be caused to the transmission shaft.
Repeat these adjustments each time the machine is mounted to a different tractor.
11

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Ahook(C)issuppliedwiththemachinetosupport
the PTO shaft (T) when disconnected to avoid
damage or deterioration due to contact with the
ground(photo12).
C
AB
D
12
To avoid accidents which could be serious, make sure that the guards are always
correctly in place and secured with the safety chains. On the machine side, attach
restraining chain (H) to the corresponding hole on the hitch-frame (photo 12). All worn
or damaged guards must be replaced immediately.

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FRICTION SLIP CLUTCH
The EL 92 is factory equipped with an adjustable friction slip clutch.
Springpressureisfactorypre-set(L=32mm/11/4")for70kW(95hp)tractorsat540rpm(min-1)PTO(photo13).
Thetheoreticalaveragelengthofsprings(R)(L=32mm/11/4")isonlyanindicationandcanbeslightlymodified
according to machine width, work conditions and tractor. Too light a spring pressure will allow the plates to slip
continuously or intermittently at frequent intervals, resulting in overheating and rapid wear of the friction plates.
On the other hand, over pressured or completely coil bound springs will provide no protection to the drive
components (this occurs at 31 mm spring length).
IMPORTANT : * Always check if the clutch is set correctly for the work to be carried out. It should feel warm
to the touch during work.
* If the clutch slips excessively (too light a spring pressure, obstacles, etc.), readjust if
necessaryand wait until thetemperatureoftheclutchdropstoa normal work temperatureof
approximately40°C(104°F)beforegettingbacktowork. Iftheclutchoverheatsitwillslipmore
easily, thus increasing disc wear.
* With L = 31 mm the springs (R) will be completely coil bound and the clutch cannot operate.
Never work with springs fully locked as this risks deteriorating drive line components if an
obstruction jams the rotor. Always loosen at least half a turn.
NEVER FULLY LOCK THE SPRINGS.
Check clutch setting regularly, especially after the machine hasn’t worked for a long time. Completely slacken
offthe 6 springs (R)byunscrewing their securingnuts,let the frictionplatesslip for afewseconds then retighten
springs as explained above (to L = 32 mm / 1 1/4").
Note : We recommend that the clutch guard be removed for easier access when carrying out slip clutch
adjustments. Don’t forget to bolt guard back in place after adjustments have been made.
13

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ROTOR SPEEDS (ROTATIONAL FREQUENCIES)
TheEL92isfittedwithaspeedgearboxwhichadapttherotorspeed(rotationalfrequency)totheworkingconditions.
TochangethePTOspeed(rotationalfrequency)invertorreplacethesetsofmatchinggearwheelslocatedatthe
rearofthegearbox.
Toinvertthepinionsproceedasfollows.Tiltthemachineforwardtoavoidoilleakingoutofthegearboxwhenremoving
thecover.
To do this :
-uncouplethePTOshaft
- shorten the turn buckle
- raise the machine in order to obtain a satisfactory angle
-removebolts(U)fromcoverplate(V)andpullthecoverandgearwheelassemblyoutofthegearbox(photo14),
- invertthesetof matching gears (Aand B)orreplaceit by the optional set,accordingtothedesired rotor speed
(rotationalfrequency)(photo15),
- reinstall the cover plate making sure to position the O-ring (E) in its groove correctly (photo 15).
14 15
*Ex-Works setting
Positionof
gears
Rotorspeeds (rotational frequencies)chartEL 92inrpm(min-1):
*
540 rpm (min-1) 194 230 178 252
1st gear set Optionalgears
(set1217070)
24 22 22 24 25 21 21 25
P.T.O.
speed
(rotational
frequency)