ARCHIVES HISTORIQUES
DELACOMMISSION
COLLECTION RELIEEDES
DOCUMENTS "COM"
COM(77)317
Vol.1977/0106

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COMMISSION OFTHEEUROPEAN COMMUNITIES
COM(77)317 final.
Brussels ,13July1977
PROPOSAL FORACOUNCIL DIRECTIVE
ONTHEAPPROXIMATION OFTHELAWSOFTHEMEMBER STATES
RELATING TOTHEDRIVER'SSEAT
ONWHEELED AGRICULTURAL ORFORESTRY TRACTORS
(submittedtotheCouncil "bytheCommission )
i'PCHV^ r<*»|
COK(77)317final.

EXPLANATORY MEMORANDUM
GENERAL REMARKS
TheCommunity type-approval procedure forwheeled agricultural andfore­
stry tractors ,which wasthesubject ofCouncil Directive 7^/150/EECof
kMarch 197^O),provides thegeneral frame ofreference forthechapter
onseats ,including thedriver 'sseat .
On23July 1968 (2),theCommission forwarded totheCouncil aproposal
foradirective ,oncertain components andcharacteristics ofwheeled
agricultural tractors ,inwhich therequirements relating tothe dri­
ver'sseat were laid down inSection XIII ofthe technical annex .
TheCouncil felt that itwhould notbeexpedient toexamine these re­
quirements prior totheadoption oftheDirective ontype-approval ,
since thelatter would introduce theadministrative procedure tobefol­
lowed inthevarious directives ontechnical aspects .TheDirective on
type-approval ,which wasproposed bytheCommission inJuly 19&8 ,was
notadopted bytheCouncil until March 197^.Hence therequirements
under Section XIII oftheJuly 1968 proposal foradirective oncertain
components andcharacteristics arenowcompletely outdated onaccount
oftheimportance which hasbeen assumed inthemeanwhile bytheques­
tion ofprotection forthetractor driver when heisdriving onthe
road or,operating thetractor ontheland .
With theaimoffollowing upand ,ifpossible ,carrying further the
progress that hasbeen made towards protecting thetractor driver ,the
Commission decided torevise itsoriginal proposal .Theamendments
were soconsiderable that itwa6necessary todraw upanewproposal
for adirective .
•••/•••
(1)OJNoLokof28March 197 **
(2)OJNoC125of28November 1968

-2-
InAugust 197^ttheDanish Government notified theCommission ,inac­
cordance with theAgreement oftheGovernments ofthe Member States
meeting inCouncil of28May19&9 amended on5March 1973 )concer­
ning standstill andinformation fortheCommission (1),ofitsinten­
tion tolegislate onthis matter .TheCommission informed that Govern­
ment ofitsintention offorwarding totheCouncil anewproposal for
adirective andexpedited itswork inthis field .However ,thetechni­
calcomplexity ofthenewrequirements relating tothedriver 'sseat
prevented theCommission from completing itswork within thetime li­
mit laid down inthe "Standstill Agreement ".TheDanish Government ,
aware ofthedifficulties encountered bytheCommission indrawing up
this proposal ,hasdeferred putting into force ofthenational require­
ments envisaged ,atthe same time stressing theurgent necessity for
theCommunity toarrive atacommon solution assoon aspossible .
II. TECHNICAL CONSIDERATIONS
This proposal foradirective lays down theconstruction andtesting
specifications necessary forEEC type-approval ofdriver 'sseats as
components ofwheeled agricultural orforestry tractors ,together with
therequirements forfitting adriver 'sseat tothetractor forEEC
type-approval ofthelatter .The seat construction specifications con­
cern inparticular thedimensions oftheseat surface ,theposition
andinclination ofthebackrest ,theadjustment ofthe seat and the vi­
bratory movement oftheseat .Thespecifications inrespect ofthe
tests tobecarried outconcern inparticular theimportant aspect of
thevibrations towhich thehuman body asawhole isexposed .Although
thedata ontheendurance ofvibrations bythehuman body andonthe
body 'sreactions arenotyetquite complete ,present scientific know­
ledge canbeconsidered reliable enough toenable tests tobeproposed
•••/•••
(1)OJNoC76of17June 1969
OJNoC9of15March 1973

-3-
towhich thedriver 'sseats must besubjected inorder that the jol­
ting andthevibrations canbereduced asmuch aspossible .Theob­
ject ofthetests proposed istodetermine (a)thecharacteristics of
thesuspension system andoftheadjustment range asafunction ofthe
driver 'sweight ,(b)thelateral stability and (c)thevertical vibra­
tory movement .Thevibratory movement oftheseat istobedetermined ,
according tothetype oftractor forwhich theseat isintended ,by
means oftests onastandardized track and/oronatest bench .
EECtype-approval will begranted foranytype ofdriver 'sseat which ,
after verification ,satisfies therequirements laid down bythedireo -
tive ,andatype-approval number will beassigned totheentire series
ofthis type ofseat .
EECtype-approval ofatractor type inrespect ofthedriver 'sseat
will begranted iftheseat bears theEECtype-approval mark and ifit
isfitted tothetractor inaccordance with therequirements laid down
therefor .
III . COMMENTS ONTHE ARTICLES
Articles 1to6establish theEECtype-approval procedure fordriver 's
seats .Thepurpose ofthi6 procedure istopermit the free movement
ofthese seats within theCommunity byprohibiting theMember States
from preventing their marketing when they comply with theconstruction
and test specifications laid down intheannexes andwhen they bear
theEECtype-approval mark themodel ofwhich isshown inAppendix 11
toAnnex II.This procedure provides forareciprocal information sys­
tem inrespect ofevery case ofgranting ,refusing orwithdrawing an
EEC type-approval .
Article 7integrates this Directive into theEECtype-approval proce­
dure .
Ascertain newMember States have nonational type-approval procedure
atpresent ,itisnecessary tolaydown provisions toguarantee the
useinthese Member States ofwheeled agricultural orforestry tractors
•••/•••

-4-
conforming totherequirements oftheDirective (Article 8)(1).
Thescope ofthis Directive islaid down inArticle 9.
Article 10lays dovm theprocedure foradapting thedirective totech­
nical progress .This procedure isset out inArticle 13oftheCouncil
Directive of4March 1974 onthetype-approval ofwheeled agricultural
orforestry tractors .
Article 11(1 )lays down twotime limits .Before expiry ofthefirst
time limit ,theMember States areobliged toadopt andpublish themea­
sures necessary forcompliance with theDirective .The second time
limit determines the date onwhich all the Member States must simulta­
neously apply thecommon rules .
Finally ,theCommission must beinformed within areasonable time of
anydraft provisions drawn upbytheMember States inthefield cove­
redbytheDirective ,sothat itcanformulate anycomments itmay
wish tomake ontherelevant text ortexts (Article 11(2 )).
IV.CONSULTATION OFTHEEUROPEAN PARLIAMENT ANDTHEECONOMIC AND SOCIAL
COMMITTEE
Theopinions ofthese twobodies must beobtained inaccordance with
theprovisions ofthesecond paragraph ofArticle 100 .
(1)OJNoL73of27March 1972 :"Documents concerning theaccession
totheEuropean Communities oftheKingdom ofDenmark ,Ireland ,
theKingdom ofNorway andtheUnited Kingdom ofGreat Britain and
Northern Ireland ".Actconcerning theconditions ofaccession
andtheadjustments tothetreaties -Annex I,Section X.

-1-
Draft proposal foraDirective relating -tothedriver 'sseat onwheeled
agricultural orforestry tractors ,
THE COUNCIL OPTHEEUROPEAN COMMUNITIES ,
Having regard totheTreaty establishing theEuropean Economic Community ,,
and inparticular Article 100thereof ,
Having re&ard totheproposal from theCommission ,
Having regard totheOpinion oftheEuropean Parliament ,
Having regard totheOpinion oftheEconomio andSooial Committee ,
Whereas thetechnical requirements which tractors must satisfy pursuant to
national laws relate ,inter alia ,todriver 'sseats ;
Whereas these requirements differ from oneMember State toanother ,
whereas itistherefore neoessaxy that allMember States adopt the same
requirements either inaddition toorinplace oftheir existing regul­
ations ,inorder toallow the "EECtype-approval procedure which was
thesubject ofCouncil Directive 74/15O/EECof4March i974 onthe
approximation ofthelaws oftheMember States relating tothetype-approval
ofwheeled agricultural orforestry tractors (l)tobeapplied inrespect
ofeach type oftractor ;
Whereas aregulation ondriver 's seats includes not only therequirements
for their installation onthe tractors but also for the construction of
these seat s;whereas aharmonized type-approval procedure would enable
foreach Member State tooheck compliance with thecommon construction and
testing requirements andtoinform theother Member States ofitsfindings
bysending acopy ofthetype-approval certificate completed foreach type
ofdriver *sasat ;whereas theplacing ofanEECtype-approval mark onall
driver^seats manufactured inconformity with theapproved type obviates
anyneed for technical cheoks onthese driverfe seats inthe other Member
States ;
Whereas ,inorder that thereciprocal recognition system byMember States of
thetests carried outbythem individually onthebasis ofthecommon
requirements mayfunction properly ,these requirements must be
applied byallMember States with effect from thesame date ,
HAS ADOPTED THIS DIRECTIVE i
(1)OJNoL84,28.3.1974 ,p.10

Article 1
1,Each Member State shall grant EEC component type-approval inrespect of
anytype ofdriver 'sseat which satisfies theconstruction andtesting
requirements laid down inAnrexes Iand II.
2.TheMember State which hasgranted EECcomponent type-approval shall
take themeasures required inorder toverify that production models
conform totheapproved type ,insofarasisnecessary andifneed
heincooperation with the competent authorities inthe other Member
States *Such verification shall beeffected bymeans ofspot oheoks .
Article 2
Member States shall foreach type ofdriver 'sseat which they approve
pursuant toArticle 1,issue tothemanufacturer ,ortohisauthorized repre­
sentative ,anEECcomponent type-approval mark conforming tothe
model shown initem 3»5«ofAnnex IIforeach type ofdriver 'sseat .
Member States shall take allappropriate measures toprevent theuse of
marks liable tocreate confusion between driver 'sseats which have been
type-approved pursuant toArticle 1andother devices .
Article 3
1.NoMember State may prohibit theplacing onthe market ofdriver 's
seats ongrounds relating totheir construction ifthey bear the
EECoomponent type-approval mark .
2.Nevertheless ,aMember State mayprohibit theplacing onthemarket
ofdriver 'sseats hearing the EECoomponent type-approval mark which
consistently fail toconform totheapproved prototype .
That State shall forthwith inform the other Member States and the
Commission ofthemeasures taken ,specifying thereasons for its
decision .

-3-
Ai-tiole 4
Theoompetent authorities ofeachMemberStateshallwithinonemonth
sendtotheoompetent authorities oftheotherMemberStatesacopyof
theoomponent type–approvalcertificates ,anexampleofwhichisgivenin
AnnexIII,completed foreachtypeofdriver'sseatwhichtheyapproveor
refusetoapprove.
Article 5
1.IftheMemberStatewhichhasgranted EECcomponent type-approval finds
thatanumberofdriver'sseatsbearingthesameEECcomponent type-
approval markdonotconformtothetypewhichithasapproved ,itshall
takethenecessary measures toensurethatproduction modelsconformto
theapproved type.Thecompetent authorities ofthatStateshalladvise
thoseoftheotherMemberStatesofthemeasures taken,whichmay,where
necessary ,andintheeventofsystematic failuretoconform,extendto
withdrawal ofEECcomponent type-approval .Thesaidauthorities shall
takethesamemeasuresiftheyareinformed bythecompetent authorities
ofanother MemberStateofsuchfailuretooonform.
2.Thecompetent authorities oftheMemberStatesshallinformeachother
withinonemonthofanywithdrawal ofEECcomponent type-approval ,and
ofthereasonsforsuohameasure.
Article 6
Alldecisions takenpursuanttotheprovisions adoptedinimplementation
ofthisDirective torefuseorwithdraw EECoomponent type-approval fora
driver *sseatorprohibit theplacing onthemarketorusethereofshall
setoutindetailthereasons onwhichitisbased.Suchdecisions shall
benotified tothepartyconcerned ,whoshallatthesametimebeinformed
oftheremedies available tohimunderthelawsinforoeintheMember
Statesandofthetimelimitsallowedfortheexercise ofsuchremedies.
Article 7
KoMemberStatemayrefusetograntEECtype-approval ornational type-
approvalofatractorongroundsrelating toitsdriver'sseatifthis
bearstheEECcomponent type–approval markandisfittedinaccordance
withtherequirements laiddowninAnnexIV.

-4-
Article 8
NoMemberStatemayrefuseorprohibit thesale,theregistration ,entry
intoserviceoruseofatractor ongroundsrelating toitsdriver'sseat
ifthisbearstheEECcomponent type-approval markandifitisfittedin
aocordanoe withtherequirements setoutinAnnexIV.
Article 9
1,ForthepurposeofthisDireotive ,"agricultural orforestrytractors' 1
meansanymotorvehicle ,fittedwithwheelsorendlesstracks,having
atleasttwoaxles,themainfunction ofwhichliesinitstractive
powerandwhichisspeoially designed totow,push,oarryorpower
certaintools,machinery ortrailers intended foragricultural orfo­
restryuse.Itmaybeequipped tocarryaloadandpassengers .
2.ThisDirective shallonlyapplytotractorB asdefinedinparagraph 1
abovewhicharefittedwithpneumatic tyresandwhiohhavetwoaxles
andamaximumdesignspeedbetween6and25km/h.
Artide 10
Anyamendments neoessary toadjusttherequirements oftheAnnexesto
takeaccountoftechnical progress shallbeadoptedinaccordance with
theprooedurelaiddowninArticle13of ■'Directive 74/150/ehX3»
Article 11
1.MemberStatesshallbringintoforcetheprovisions necessary m
ordertocomplywiththisDireotive within18monthsofitsnoti­
fication andshallforthwith informtheCommission thereof.
•••/•••

-5-
2*OnoethisDirective has'beennotified ,MemberStatesshallalsoensurethat
theCommission isinformed ,insufficient timeforittosubmitits
comments ,ofanydraftlaws,regulations oradministrative provisions
whiohtheyproposetoadoptinthefieldcoveredbythisDirective .
Article 12
ThisDirective isaddressed totheMemberStates.

LIST OFANNEXES
ANNEX I DEFINITIONS
ANNEX II CONSTRUCTION ANDTEST SPECIFICATIONS -CONDITIONS FOREEC
TYPE-APPROVAL AND MARKING
1.General spécifications
2.Special requirements
2.1 .Seat surface dimensions
2.2 .Position and inclination ofthebackrest
2.3 -Inclination ofthe seat surface
2.4 .Seat adjustment
2.5 .Seat testing
3.Condition forEECtype-approval andmarking
3.1 .Conditions forEECtype–approval ofaseat
3-2 .Application forEECtype-approval
3.3 .Inscriptions
3.4 .EECtype-approval
3»5 *Marking
Appendices 1-11
ANNEX III MODEL OFEEC TYPE-APPROVAL CERTIFICATE
ANNEX IV SEAT INSTALLATION REQUIREMENTS FOREECTYPE-APPROVAL OFA
TRACTOR
ANNEX V ANNEX TOTHE EEC TYPE-APPROVAL CERTIFICATE FOR ATRACTOR *
THE DRIVER 'SSEAT

1- Annex I,p. 1
ANNEX I
»
DEFINITIONS
For the purposes ofthis Directive :
1. "Driver 'sseat "means the seating provision for the person
driving the tractor .
2. "Seat surface "means the almost horizontal area ofthe seat
which supports the driver when seated .
3. "Backrest "means the almost vertical area ofthe seat support­
ing the driver 'sback when seated .
k, "Lateral seat supports "means the devices orforms ofthe seat
surface that prevent the driver from sliding sideways .
4.1® "Seat armrests "means the devices oneither side ofthe seat
which support the driver 'sarms when heisseated .
5* "Seat reference point "(SRP )means thepoint ofintersection in
the central longitudinal plane ofthe seat between the tangential
plane atthe base ofthe upholstered backrest and ahorizontal
place eThis horizontal plane intersects the lower surface of
theseat 150mminfront oftheseat reference point (seeAppen­
dix 1toAnnex II).
6. "Depth ofthe seat surface "means the horizontal distance
between the SPRand the front edge ofthe .seat surface .
7o "Width ofthe seat surface "means the horizontal distance between
the outside edges ofthe seat surface measured inaplane perpen­
dicular tothe central plane ofthe seat .
8. "Load adjustment range "means therange between thetwoloads
corresponding tothemean positions inthe suspension system
curves plotted for the heaviest and lightest driver .
/.

-2-Annex I,p.2
9."Suspension travel "means themovement from the highest tothe
lowest position inthesuspension system .
10."Vibration "means thevertical movement upand down ofthedriver 's
seat .
11."Vibration acceleration (a)"means the second differential ofthe
vibration displacement with respect totime .
12."R.m.s .value oftheacceleration means the square root of
the meant square ofthe accelerations .
13."Spectral power density ($)"means thelimiting value ,when
&b->o ,ofthe square ofthe r.m.s .value measured after a
filter oflimited pass-band ,divided bytheband-width ofthe
filter (6b=width offilter ).
14."Weighted vibration acceleration (&w)"means theweighted vibration
acceleration determined with the help ofweighting filter in
accordance with item 2.5.3.3.5.2 .ofAnnex II.
15."Vibration ratio "means the ratio ofthe weighted vibration
acceleration measured onthe driver 'sseat tothat measured at
the point ofseat attachment .
16."Vibration class "means theclass orgroup ofstandard tractors
which show the same vibration characteristics .
17."Standard tractors "means tractors whose characteristics enable
them tobeclassified inone ofthe vibration classes because of
similar constructional features .
••/••

-3-Annex I.P«3
V\
17.1 .Thecharacteristics ofthese t>^ctors areasfollows :\
Number ofaxles :two Va ,'V
%.
Load distribution :
-front axle :30-45%ofunladen weight y,
-rear axle :70-55%ofunladen weight ;
\
Λ
Tyres :front smaller than rear
(ratio oftyre radii –4:5);
Track width :smallest adjustable track width greater than
1150 mm;
Suspension :rear axle unsprung ;
Horizontal position ofseat :between rear axle and centre of
gravity oftractor .
17.2 .Tractors ofstandard design are subdivided into classes :
Class I:1,400 to3»600 kgunladen weight
Class II:3*601 to5t000 kgunladen weight .
18. "Reference tractor "means atractor whose vibration behaviour is
specific for testing aseat for avibration class .
18.1 .The technical data for reference tractors must accord with the
values shown inthe table .,below :
••/••

-4-Annex I,P.k
(*)These tolerances must not beexceeded unless itisshown that
thespectral power density ofthevertical acceleration atthe
point ofseat attachment satisfies the conditions specified in
Appendices 9and 10 .ofAnnex II.
(*)These values areapplicable todiagonal tyres ;ifradials are
used ,thepressure must beincreased by15%•
19."Non-standard tractor "means atractor whose characteristics aresuch
that itcannot beclassified inany vibration class .

-5-Annex xl.P. 1
ANNEX II
CONSTRUCTION AND TEST SPECIFICATIONS -CONDITIONS FOR EEC TYPE
APPROVAL AND MARKING
1. GENERAL SPECIFICATIONS
1.1 .The driver 'sseat must bedesigned toensure acomfortable
position forthedriver when controlling andmanoeuvring the
tractor ,and toafford him the utmost protection asregards
health and safety .
1.2 .The seat must beadjustable inthelongitudinal direction and
inthe height without the use ofatool .
1.3 .The requirements under points 1.2above donothowever ,apply
ifthe seats are intended for installation intractors with
aminimum width between the rear wheel tracks of1150 mmor
less .
1.4 .Theseat must beadjustable forpersons ofdifferent weights .
Where adjustment isnecessary inorder tocomply with this
requirement ,itmust becarried out without the use oftools .
1.5 .The seat must bedesigned toreduce shocks ,and vibration .
Itmust therefore bewell sprung ,have good vibration absorption
and provide adequate support attherear and sides .
Thelateral support isconsidered adequate iftheseat is
designed toprevent thedriver 'sbody from slopping sideways .
1.6.Theseat surface ,thebackrest ,thelateral supports andthe
removable ,folding orfixed armrests must beupholstered .
1.7 .Theseat reference point (SRP )must bedetermined inthe
manner specified inAppendix 1ofAnnex II.

-6-Annex II,P.2
Save asotherwise provided ,the measurements and tolerances
must comply with the following requirements :
The measurements given must beexpressed infull units and
rounded off tothe nearest whole number .
The instruments used for making measurements must beenable
the measured value toberounded off tothe nearest whole
unit and must beaccurate within the following tolerance
limits :
for length :+5%
for angle measurements :+1"
for determination oftractor weight :+20kg
for measurement oftyre pressure :+0.1 bar
Foralldata relating todimensions ,atolerance of+5%
isallowed .
Th«seat must undergo the following tests :
Determination ofthe suspension characteristics and the
range ofadjustment tothe driver 'sweight .
Determination oflateral stability .
Determination ofvibration .
The seat undergoing theabove-mentioned tests must possess
the same characteristics with respect toconstruction and
fittings asthe seats inseries production .
All the tests must becarried out onthe same seat inthe
order specified inpoint 1*9 *
Before the tests are carried out ,the seat must have been
run inbythe manufacturer .
Iftherequirements specified for .onephase ofthe test are
not fulfilled ,orifthe test seat shows damage that might
affect itscharacteristics ,the test must beterminated and
thetest report must state thetest results obtained soiar
and the reason for termination ofthe test . /•••/•••

Annex II,p.3
1.14. S«atstested forClass Itractors aresuitable only for
tractors ofthat class ,whereas seats tested forClass II
tractors aresuitable forClass IorClass IItraotors .
2. SPECIAL REQUIREMENTS
2.1 , Seat surface dimensions
2.1*1 * Thedepth oftheseat surface ,measured parallel tothelon­
gitudinal median oftheseat atadistance of150mm,must
be400 +50mm (seeFig .below ).
.2.1*2>* Thewidth oftheseat surface ,measured perpendicular tothe
median ofthe seat ,150mminfront ofthe SRP and 80mm
above that point ,must beatleast mm (seeFig .below ).
2.1.3 * The depth and the width ofthe surface ofseats intended for
tractors inwhich the distance between the rear wheels does
not exceed 1150mmmay bereduced ifitistechnically im­
possible tocomply with the specifications initems 2.1.1 .
and2.1.2 .above ,namely ,300mmforthedepth and400mm
for the width .
2.2 * Position and inclination ofthe backrest
2.2.1 * Theupper edge ofthebackrest oftheseat must beatleast
260mmabove theSRP (seeFig .below ).
2.2.2 * Thebackrest must have aninclination of10° +5° (seeillus­
tration below ).
2.3* Inclination ofthe 6eat surface
2.3*1 * Theinclination towards therear 0t(seefigure below )of
the surface oftheloaded cushion must be3-12° inrelation
tothehorizontal ,measured with theloading device inac­
cordance with Appendix 1.
2.3.2 . Thechoice oftheangle ofinclination within this category
shall depend ontheseated position .

-8-Annex II,P.L.
2.k . Seat adjustment
The seat must beadjustable inthelongitudinal direction
byadistance of150mm (seefigure below ).
2.^.2 . Theseat must beadjustable inthevertical direction bya
distance of60mm (seefigure below ).
-Figure -
10 -tr-o
jmin*adjustment of+30mm
SIîP
min. adjustment of+75 mm
•150^_r;j
\-^n\
o ,l\ I<5
'J//*
400±50 \ «tSRP
2.5 . Seat tests
2.5*1 * Test todetermine thesuspension characteristics and_the
range ofadjustment tothedriver 'sweight

-9- Annex II,P.5
2.5.1.1 * Thesuspension system characteristics shall bedetermined
byastatic test .This must becarried outwith theseat
adjusted toaccomodate adriver weighing 50kgand one
weighing 120 kg.
The maximum and minimum values limiting the range through
which the seat isadjustable tothe driver 'sweight shall
becalculated from the suspension system characteristics .
2*5*1 *2. The seat shall bemounted onatest stand and aload applied
toit,either directly orbymeans ofaspecial device ;the
load applied totheseat shalil not differ bymore than 5N
from thenominal load .The depression ofthe suspension
system shall bemeasured with anaccuracy ofnot less than
+1mm*
2.5*1 *5* Acomplete characteristic curve representing thedeflection
ofthesuspension systea shall beplotted from zero load
tomaximum load ,and back tozero *
The load graduations atwhich the depression ofthe sus­
pension system ismeasured shall not begreater than 100 N;
atleast eight measurements points shall beplotted at
roughly equal intervals inthemovement ofthesuspension
system *The point taken asthemaximum load shall beeither
that atwhich nofurther spring depression can berecorded *
orload of1,500 N*After theload hasbeen applied or
withdrawn ,thevertical depression ofthesuspension sys­
tem shall bemeasured 200 mminfront ofthe seat reference
point ;sufficient time shall beallowed after theapplica­
tion orremoval ofthe load toensure that the seat isat
rest *
2.5*1.4 * Inthecase ofseats without fixed weight adjustment limits ,
thesettings shall besoselected that :
2«5«1 .4.1*forthelightest driver ,theseat returns tothetopofthe
suspension travel when theload isremoved ;and
•90/•••

-10- Annex II,p.6
2.5*1 •^•2.fortheheaviest driver ,theload of1500 Njust depresses
the seat tothe lowest limit ofthe suspension travel ,
the range ofweights thus determined shall then bedeemed
greater than the range measured .
3*iftheseat isequipped with aprogressive lower spring
stop ,thelowest position ofthesuspension travel (see
Annex I,item 9)®ay hedefined astheposition which the
seat assumes under aload of 1000N,inthesetting for
the lightest driver .
2.5*1 •5» The mean position ofthe suspension system istheposition
which the seat assumes when itisdepressed byhalf the
full travel ofthesuspension system .
2.5 •1.6. Since thecharacteristic curves ofthesuspension system
are generally hysteresis loops ,the load must bedetermined
bydrawing acentre line through theloop (seeAnnex I,it^m 8
anditems AandBinAppendix 2ofAnnex II.)
2.5o1o7o Todetermine the limits ofthe adjustment range asafunc­
tion ofthe driver 'sweight ,the values ofpoints Aand B
(seeAppendix 2)established inaccordance with item
2.5.1 .6.must bemultiplied by1.5.
2.5.2 . Test todetermine_the_lateral_stabilitjr
2.5.2.1 . Theseat shall besetforthemaximum permissible driver 's
weight andconnected tothetest stand insuch awaythat
itsbase plate rests onafixed plate (test 6tand )not
smaller than thebase plate itself .
2.5 .2*2 . Atest load of1000Nshall beapplied tothesurface or
cushion oftheseat .Thepoint ofapplication shall lie
200mminfront oftheseat reference point andalternately
onthetwosides 150mmfrom theplane ofsymetry through
the seat *
•••/•••

-11- Annex II-p.7
2.5«2c3 « During application oftheload ,thevariation inthelate­
ral angle ofinclination oftheseat surface shall be
measured andrecorded intheendsettings forhorizontal
andvertical seat adjustment .Apermanent deformation close
tothepoint ofapplication oftheload shall not betaken
into consideration .
2.5.3 . Test todetermine thevibration _
The seat vibration isdetermined bytests onastandard
roadway and/ortest stand depending onthetype oftractor
for which itisintended .
2.5 Testing onastandard roadway
The roadway consists oftwoparallel strips spaced according
tothe wheeltrack ofthe tractor .The surface may becast
insmoolthly surfaced concrete ,oritmay beformed ofwood
orconcrete blocks set inabasic structure .The surface
ofeach track strip i6defined bythe ordinates ofeleva­
tion inrelation toabase line ;these ordinates are shown
inthe tables inAppendix 3»With regard totheroadway ,
theelevation isdefined atintervals of16cmalong each
strip .
The roadway must befirmly set inthe ground and the dis­
tance between the strips must deviate only slightly over
itsentire length ;thetractors wheels must befully sup­
ported atall times .Where thestrips areformed ofblocks ,
these must be6-8 cmthick andarranged atintervals of
16cm.
The total length ofthetrack shall be100m.
2*5<>3*1e2 «The vertical vibrations transmitted shall bedetermined at
aspeed of12+0<>5 km/h.Theprescribed speed must be
maintained without the use ofbrakes .The vibrations
shall beme&sured onthe seat (with alight and aheavy
driver )and atthepoint where theseat isattached to
the tractor .

-12-Annex II.,p.8
Th«speed of12km/hmust bereached after arun-up track
has been traversed .The surface ofthis run-up track must
beflat and must join the test track without any change in
level .
2.5.3.1 .3.The seat must beset for the driver 'sweight inaccordance
with the maker 'sinstructions .
2.5.3.1 .^.Thetractor must befitted with aprotective frame and/or
cab save where this equipment isnot required .Itmust not
carry anyancillary equipment .Moreover ,there must beno
ballast onthe wheels otframework ,and nofluid inthe ty­
res *
2.5.3.1.5 .The tyres used during the test must have the standard
dimensions and ply-rating ,asspecified inthemanufacturer 's
instructions .The depth ofthe tread must not beless than
65%ofthedepth ofanewtread .
2«5*3*1«6 *Theside-walls ofthe tyres must notbedamaged *Theinter *
nalpressure ofthetyre must correspond tothearithmeti­
calmean ofthereference pressures recommended bythe
tyre manufacturer .Thewheel track must correspond tothat
used under normal working conditions for thetractor model
onwhich the seat isfitted .
2.5*3*1 *7*The measurements atthepoint ofseat attachment and onthe
seat itself may bemade during the same run oronseparate
runs .
Formeasuring and recording thevibrations ,anaccelerometer ,
ameasuring amplifier and amagnetic tape recorder ordirect -
reading vibration meter shall beused .The specifications
forthese instruments arelaid down inpoints 2*5*3«3.2 .to
2.5*3.3.6 .
2.5*3.2 .Testing onthe test stand
2.5.3.2.1 .The test stand must simulate the vertical vibrations at
th'3point ofattachment ofthedriver 'sseat .Thevibrations
aregenerated bymeans ofanelectro-hydraulic device .The
setvalues areeither those specified inAppendices kand5
for the /
••/••

-13- Annex II,p.9
class oftractor inquestion ,orthedouble-integrating acce­
leration signals recorded attheseat attachment ofanon­
standard tractor moving ataspeed of12+0.5km/hona
standard roadway asdefined inpoint 2.5*3«1*1 *Thevibra­
tions must betransmitted toaplatform which roughly corres­
ponds initsdimensions tothedriver 'scabofatractor .
Togenerate thevibrations ,anuninterrupted double runofthe
seat values orthedouble-integrating acceleration signals
must beused ,recorded attheseat attachment ofanon-stan­
dard tractor type moving onstandard track .Themeasurements
must notbemade during thefirst runofthesetvalues orof
the acceleration signal .
2»5 »3*2.2 Besides anattachment for the test seat ,theplatform must
contain asteering wheel and footrest .Its configuration must
beasshown inAppendix 6.
2.5*3*2.3 The test stand must have ahigh degree offlexural and tor­
sional rigidity ,and its bearings and guides must have no
more than the technically necessary clearance .Ifthe plat­
form iscarried onavibrating arm ,the dimension Rmust be
atleast 2,000 mm (seeAppendix 6).
The test stand must beable tosimulate sinusoidal vibrations ,
asshown inAppendix 7»when aweight of150kgisapplied .
2.5 «3«3 -Specifications fortests onroadway and test stand
2.5.3 .3.1 Driver's weight
The tests must becarried out with two drivers :one with a
total weight of55kg+10#,ofwhich notmore than 5kg
may becarried inaweighting belt around thebody ;theother
weighing of98(+10%),with amaximum weight of8kgin
the belt .
•••/• ••

Annex II,p.10
-2.5*3o3 o2» Position ofthe accelerometer
Tomeasure thevibrations transmitted tothedriver ,an
accelerometer shall beplaced onarigid and flat plate
with adiameter of250 mm+50nui,the central part of
which must berigid uptoadiameter of75mmandmust
include arigid protective device toprotect the accele­
rometer .This plate must beplaced inthe middle ofthe
seat surface between the seat and the driver and have a
foam rubber covering about 20mmthick ,,
Tomeasure the vibrations ofthe seat attachment ,anac­
celerometer must beplaced onthis attachment atapoint
not more than 100mmfrom the longitudinal median plane
ofthe tractor and not outside the vertical projection
ofthe seat surface onthe tractor .
2.5.3.3.3 . Measurement ofvibration acceleration
Theaccelerometer and theassociated amplifying and trans­
mitting equipment must respond tovibrations with an
2 .. ...r.m.s .value of0.05 n/s•and becapable ofmeasuring
2vibrations with anr.m.s .value of5m/sand acrest
factor (ratio ofpeak tor.m.s .value )of3without
distorsion andwith amaximum error of2.5 •%over the
range 1-80 Hz.
2.5 «3-3 »1** Magnetic tape recorder
Ifatape recorder isused ,itmust have amaximum repro­
duction error of+3«5»% infrequency range of1-80 Hz,
including change oftape speed during replay foranalysis .
2.5*3«3*5 * Vibration meter
2.5»3»3»5*1•Vibrations ofmore than 10Hzmay bedisregarded .Itis
therefore permissible toconnect upstream ofthemeasu­
ring instrument alow-pass filter with acut-out frequency
ofabout 10Hzand anattenuation of12dBper octave .
•••/•••

-15- Annex II,p.11
2.5.3.3.5.2 .This instrument must incorporate anelectronic weighting
filter between the sensor and the integrator stage .
The filter must correspond tothecurve shown inAppendix
8andthemargin oferror mu6t be+0.5 dBinthe2-4Hz
frequency band and +2dBfor theother frequencies .
2.5.3.3.5.3 .Theintegrator stage must becapable ofindicating either
-theintegral ofthesquare oftheweighted vibration
acceleration (a )for atest time T
JL
Saw41
-orthesquare root ofthat integral ,except where it
directly indicates ther.m.s .value oftheweighted
vibration acceleration (a
aweff γΐ/τ=/r
Theoverall inaccuracy inther.m.s .value oftheweighted
acceleration calculated inthis way must bewithin +5
2.5.3«3.6 . Calibration
All instruments must beregularly calibrated .
2.5.3*3*7 . Evaluation ofvibration tests
2.5»3*3*7*1 *During each test ,theweighted vibration acceleration for
the whole test time shall bedetermined with the direct -
reading vibration meter specified inpoint 2.5*3*3.5 .
2.5.3.3.7.2 .Inaddition tothepairs ofmean values relating tothe
vibration ofthetractor ortheseat ,thetest report
shall also contain theratio oftheweighted vibration
acceleration onthe driver 'sseat tothat measured atthe
seat attachment .This ratio shall begiven totwo deci­
malpoints .
•••/•••

-16- Annex II,p.12
2.5.3.3.7.3 .Therange ofambient temperature during thetests shall
bemeasured and shown inthe report .
2.5.4® Tests tobecarried_out_on_tractor_seats_degervding_on_the
intended_use
2.5 .4.1. Aseat intended foruseonastandard tractor must be
tested either onastandard roadway with theaid ofa
reference tractor appropriate totheclass ofthe
standard tractor inquestion oronavibration test
stand using theappropriate setvalue signals .
Ifthetest ofaseat intended foruse inastandard
tractor iscarried out onastandard roadway with are­
ference tractor ,thetest isvalid fortheentire tractor
class .If,however ,thetest iscarried outwith the
tractor forwhich theseat isintended ,itisvalid only
forthat particular combination ofseat andtractor .
2®5e4.2. Aseat intended foruseonanon-standard tractor must
betested onastandard roadway with thetractor onwhich
itistobeused .However ,asimulation test may also
becarried outusing asetvalue signal corresponding
totheacceleration curve which wasdetermined during
thetest onstandard roadway with thetractor forwhich
the seat isintended .
2.5.4.3 . Aseat intended foruseonly onaparticular standard
tractor mayalso betested inaccordance with therequi­
rements under point 2.5.4.2 .above ;inthis case ,type
approval will begranted only forthetractor forwhich
the test seat isintended .
2.5.5. Special reguirement6 _for_seat_vibration_tests_on_standard
tractors
2.5.5.1 . Thevibration behaviour ofthereference tractor ,which
isthecritical factor inthetest onthedriver 'sseat ,
isdefined bythespectral power density ofthevertical
acceleration (Appendices 9and1Q)recorded atthe
_ •••/•••

-17- Annex II,p.13
seat attachment ofthereference tractor during arun onthe
standard roadway inaccordance with theprovisions ofpoint
2.5.3.1 .
2.5«5*2.The weighted acceleration measured attheseat attachment
during thetest runofthereference tractor must liewithin
the following ranges :
For Class Ireference tractors :
awB=1*9 ..... 2.2m/s
For Class IIreference tractors :
an»1.6 1.8m/swB
Thevalue awfiactually present attheseat attachment during the
measurement run must bedetermined .Incase ofdeviation
from the reference value of :
2a*g=2.05 m/sforClass I
«* -19 m/fi2f0rCla6S lr»a^g-1."o/s
the acceleration ofa measured onthe driver 'sseat must bews
corrected inaccordance with the relation :
a*wB
sa xws ws a_wB
2.5*5»3*Ineach phase ofthestandard roadway test ,atleast two
measurement runs must becarried out .The measured values
must not deviate from the arithmetic mean bymore than +5
2.5>5•^•Inthecase ofthetest carried outonthestand ,thesetvalue
signals for thegeneration ofthevertical movement ofthe seat
attachment must have been determined bydouble integration of
theacceleration signals recorded atthe seat attachment of
Class IorIIreference tractors during arunonthestandard
roadway .They aregiven inAppendices kand5-
The test stand must besoadjusted that theseat attachment is
subjected toaweighted acceleration of :
a-=1.9 2.2m/s .
„.•••/•••

-18-Annex II,p. 1if
for Class Istandard tractors ,and
a^g =1.6............ 1.8m/s^
for Class IIstandard tractors
Thevalue a^gactually present attheseat attachment during
measurement must bedetermined .Incast ofdeviation
from the reference value of :
a*ga2.05m/s^forClass a*_a2.05 m/sforClass Istandard tractors
wB2=1.7m/s forClass IIstandard tractors ,
the acceleration ofa measured atthe driver 'sseat mustws
becorrected inaccordance with the following equation :
a*wB
a_aawB ws
wB
2.5.5.5 . For the test onthe stand ,the requiremeats under point
2.5.3*2 .are applicable ,and thevibration must begene­
rated inaccordance with therequirements under point
2.5.5.2 .
For each ofthe twodrivers referred toinpoints 2.5.3«3>1>t
theweighted vibration acceleration must bemeasured atthe
seat over aperiod of28seconds .Atleast twotest runs
must becarried out .The measured values must not deviate
from thearithmetic mean bymore than +5%•
2.5.6 . Sgecial requirements forvibration tests onseats o^_222l
standard tractors
2.5-6.1 . Inaccordance with therequirements under point 2.5*^.2 .,
the seat vibration tests are not applicable toagroup or
class oftractors ,but each tractor type forwhich the
seat isintended .
2.5.6.2 . Thetest onstandard track must becarried outinaccor­
dance with therequirements under items 2.5»3«1 «and
2.5.3.3 .Inthis case ,thevibratory acceleration measured
onthedriver 'sseat (a )need notbecorrected andis
*accordingly identical with thereference value a «

19- Annex II,p.15
2.5.6.3 .The -testing onthetest stand must becarried outinassociation
with atest onstandard track inaccordance with therequirements
ofpoints 2.5.3«2«and 2.5*3*3*
The setpoints forvibration rigdrive unit shall "bedetermined
bydouble integration ofthevibratory movement acceleration
signal reoorded inaccordance with point 2.5*3*2.1 .
2.5«6.4 ,Inthedetermination ofthe set values obtained inaccordance
with theprovisions of2.5*6.3 .above ,theweighted vibration
acceleration (A )recorded onthe test stand atthe seatwp
attachment must not deviate bymore than +10%from the
value (&wp)recorded onthestandard roadway inaccordance
with therequirements under 2.5.6.3 .above .Intheevent of
deviation from thevalue (AJ)measured attheseat attach -wF
ment during the test run ,the wexghted vibration accelera­
tion recorded atthe driver 'sseat during the test onthe
test stand must becorrected asfollows :
* a-oa »a x wFws wsawp
Each ofthe tests onthe test stand must becarried out twice «
Themeasured values must not deviate bymore than +5%from
the arithmetic mean .
3. ' PROVISIONS RELATING TOEEC TYPE-APPROVAL AND MARKING
3.1 * Conditions for EEC type-approval ofaseat
Inorder toqualify forEEC type-approval ,aseat must ,in
addition tofulfilling therequirements set outabove ,satisfy
thefollowing conditions :
3•1•1o Themaximum range ofadjustment for thedriver 'sweight must
extend from atleast 50to120kg.
3«1«2« Thechange intheangle ofinclination measured during the
lateral stability test must not exceed 5°,
•/•

-20- Annex II,p.16
3.1.3 * Thecorrected measured value oftheweighted vibration acce-
*x , . .2leration (a )must notexceed 1.25 o/s.None oftheW6
measurements must deviate from thearithmetic mean bymore
than +5%•
3.2 . Application for EEC type-approval
3.2.1 . Theapplication forEECtype-approval shall besubmitted by
theowner ofthetrademark orbyhis authorized representative .
3.2.2 . For each type ofdriver 'sseat ,the application shall be
accompanied by :
3.2.2 01.abrief technical description ,stating inparticular the
tractor ortractors forwhich itisintended ,
3.2 02.2o drawings intriplicate ,sufficiently detailed topermit
identification ofthe type ofseat and showing inparticular
its dimensions ,its weight ,itssuspension system and its
means ofattachment ,
3.2.2.3 .atleast one seat ,
3.2\Zmk 0onetractor (ifnecessary )representative ofthetype of
tractor for which the seat isintended .
3»3o Inscriptions
3*3*1 • The seat submitted for EEC type-approval must bear the
applicant 'strademark ,clearly and indelibly inscribed .
3.3.2 . Oneach seat /there must beanarea large enough for theEEC
type-approval mark ;this area must beshown onthe drawings
referred toinpoint 3*2.2.2 .above .
3.4 . EEC type-approval
3.^.1 • Ifthe seat submitted inaccordance with theprovisions of
point 3*2 .complies with therequirements ofpoints 3*1 .
and3*3 *»EEC type-approval will begranted and atype-ap -
proval number allocated .
3*4.2o This number must not beallocated toanyother type ofseat Q
./.

-21- AnnexII,p.17
3.5«Marking
3*5«1«Everyseatthatconforms toatypeapproved mpursuance of
thisDirective mustbearanEECtype-approval mark.
Thetype-approval markshallconsist ofarectangle ,within
whichshallbeplacedtheletter "e"followed bythedistin­
guishing numberorletteroftheMemberStatewhichhas
granted type-approval :
anEECtype-approval numbercorresponding tothenumberof
theEECapproval certificate issuedforthetypeofseat,
belowandclosetotherectangle andthemark,and,above
andclosetotherectangle ,-thetypeoftractorofstandard
modelforwhichtheseatisintended .Thismarkshallbex
ForCategory Istandard modeltractors :I
ForCategory IIstandard modeltractors :II
ForCategories IandIIstandard modeltractors gI&II.
Ifnomarkisshownabovetherectangle ,thismeansthatthe
seatisintended foranon-standard modeltractor .
3»5*3«TheEECtype-approval markshallbeaffixedtotheseatin
suchawaythatitisindelible andclearlylegible even
whentheseatismounted onthetractor .
3*5«^»Anexampleofthetype-approval markisgiveninAppendix 11«
•/O

-22- Annex11.p,15
Thedimensions ofthevarious components ofthismarkshall
notbesmaller thantheminimum dimensions specified for
marking asillustrated inAppendix 11.

-23- Annex II
Appendix 1,p.1
METHOD OFDETERMINING THE SEAT REFERENCE POINT
1.DEFINITION OFTHE REFERENCE POINT
The reference point isdefined asthe point inthemedian longitu­
dinal plane ofthe seat where the plane tangential tothe lower
part ofthepadded backrest and ahorizontal plane intersect .This
horizontal plane cuts the lower surface ofthe seat-pan board
150mminfront ofthe seat reference point#
2.DEVICE FOR DETERMINING THE SEAT REFERENCE POINT
Thedevice (Figure 1)should consist ofaseat-pan board andthe
components ofapadded backrest .The lower part ofthepadded
backrest shall bejointed intheregion oftheischium humps (A)
andtheloin (B)fthejoint (B)being adjustable inheight .
3.METHOD OFDETERMINING THE SEAT REFERENCE POINT
The 6eat reference point shall beobtained byusing the device il­
lustrated inFigures 1and 2,which simulated loading byahuman
occupant .The device shall bepositioned onthe seat .Itshall
then beloaded with aforce of550 Natapoint 50mminfront of
joint (A)and twoparts ofthepadded backrest lightly pressed
tangentially against the padded backrest .
Ifitisnot possible todetermine definite tangents toeach area
ofthepadded backrest (below andabove thelumbar region )the
following procedure 6hall beadopted :
a)Nodefinite tangent tothelower area possible :
The lower part ofthepadded backrest board inavertical posi­
tion shall belightly pressed against thebackrest .

-24- AnnexII
Appendix I.p.2
Nodefinite tangent totheupperareapossible s
TheJoint(B)shallbefixedataheightof230mmabovethe
seatreference pointifthelowerpartofthepaddedbackrest
boardisvertical .Thenthetwopartsofthepaddedbackrest
boardinavertical position shallbelightlypressedagainst
thepaddedbackrest .

k
-25-
FIGURE 1
Devioefordetermining theseatreference pointAnnexXI
Appendix 1,p.3
[om
B–ΙΒr
»le. •' AS**M ts* A X/I
I 200
,20
! I
LsAl|
in QI "–-of–\n I–oo*-1 -1-H £51–1IyII 1–I-olro^rrr
.I 460
15010u
φ
4»
α>3
m
Go
•Ha
C
a>S
δα.'
FIGURE 2
Deviceinposition
Π8ΊΓ
"lj°j150,Seatreference point

-26- AnnexII
Appendix 2,p.1
AnnexII
TESTTODETERMINE THECHARACTERISTICS OFTHESUSPENSION SYSTEM
Hysteresis curvestodetermine themaximum adjustment range
(point2.5.1.)
/
]
140|-
j
j Maximum
j /fdefleotion
120- /
100 ..
/load //'
60f~jrange //
4/J. !
i ' 1i
s.// ®c i. /,/ "ào
2°f JS i // ta
*d..oA- SP,Ι'7' "' :
J»/ ;.
j/ {_. _M
20 40 60 80 100
DEFLECTION .ma

-? Annex II
Appendix 3,p.
TESTONSTANDARD ROADWAY-TABLEOFELEVATION ORDINATES INRELATION
TOANARBITRARY BASICLEVELDEFINING THESURFACE OFEACHSTRIPOF
THEROADWAY (POINT2.5.3.1.1 .)
Dadistance from starting point (metres )
Laordinate oftheleft-hand strip (mm)
Haordinate ofthe right-hana strip (mm)


–29– Annex' II
Appendix 3,p.3

-30- Annex II
Appendix p. 1
Set-value signals for the test-stand testing ofdriver 'sseats for
Class Istandard tractors (point 2»5«3»2»1 «)
PS ■set point
..i+a *amplitude ofthe required value signal in10m,
t ■measurement time inseconds
These signals areshown inthe table for700 required points#
They can bestored numerically and ,after passing through alow-pass
filter with acut-off frequency ofabout 10Hzandhigh-frequency
attenuation of12dB/octave ,they show theamplitude ofthesetvalue
for the electro-hydraulically controlled test stand .The set-value
signals must berepeated without interruption *

-31- Annex II
Appendix U,p.2

-52-Annex II
Appendix U,p.3

*2- AnnexII
Appendix k,p.^

-3^- AnnexII
Appendix 5.p.1
ANNEXII
Set-value signalsfortheteststandinspection ofdriver'sseatsfor
ClassIIstandardtractors (point2.3*3*2.1.).
PS■setpoint
a■amplitude oftherequired valuesignalin10m
t■measurement timeinseconds
Thesesignals sureshowninthetablefor700setpoints.
Theycanbestorednumerically and,afterpassing through alow-pass
filterwithacut-offfrequency ofabour10Hzandhigh-frequency
attenuation of12dB/octave,theyshowtheamplitude ofthesetvalue
fortheelectro-hydraulically controlled teststand.Theset-value
signals mustberepeated withoutinterruption .

25-Annex II
Appendix 5,p.2

PS
No.
257
258
259
260
261
262
263
264
265
266
2G7
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289.
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
303
309
310
311
312
313
314
315
316
317
318
319
320-36-AnnexII
Appendix 5>P«3

37-Annex II
Appendix 5,Ρ·*

-38-
A'3752XII
TESTSTAND
(point2.5»3«2.)
625±50AnnexII
Appendix 6
Dimension inmm
jadjustmènt "
SeatreferenceProfile |
*■ , '0°Ï5»
/o /L/\I/• • RM
AJ^.AZTCVTTZ^TTTXÆ .lif
point < •j^-SeatrefZ-t –I–t»+75min. ^ ,, jâdjustment
•–––|•1"ï 1iy.––... i y^7*"" • ■*•.'■...£?i–jj
' î |°|CNI
| '°OO
t––~–
j S;;;;//;;/À
Planj ^Seatrefera
■1 \
si\\VvI/ /il/"enWw// /ii•/<4
t20
205
235
305
32'j
315
3G5
38b
405
«25
4<5
<65
1851V
f
f..5
?V­
i.,
7.-.:.
point
(SRP)
Seatreferenoe point(SRP)
1)Theangleofthesteeringcolumninrelationtotheverticaldependsonthepositionofthe
seat,thediameterofthesteering wheel.
2)Therearwardinclination ofthesurfaoeofthefittedseatcushionmust "be3®-12°inrelatio-
tothehorizontal whenmeasured withtheloadingdeviceinaccordance withAppendix 1.The
ohoiceoftheangleofinclination withinthisolassdependsoftheposition whenseated.

«.39- AnnexII
Appendix 7
TRAVEL OFTHEVIBRATION TESTSTAND
(point
–r–M-v-:-
M 1 10 100
Frvqoency ,Hz

-ko- AnnexII
Appendix ô
CHARACTERISTIC OFTHEFILTER OFTHEVIBRATION MEASURING
INSTRUMENT (Point2.5.3.3.5.)
£®241r 1
«A • ,«•.M
+* M9 O
g21 :
f°-1! /
f :1 :I . /
15 1 7^
! /
«4ΓΓ~Τ7
0 !– ,y;:"•4r i //
i.oo 1. £\––\
1 2 4 8 16 64
Frequencv ,Hz
\
\
\
f

-H1- AnnexII
Appendix 9.p.1
Spectral powerdensity ofthevertical vibration acceleration atthe
seatattachment oftheClasaIreference tractor (point2.5*5*)
Thespeotral powerdensity ofthevertical vibration acceleration at
theseatattachment oftheClassIreference tractor canbeapproxi­
matelyexpressed bythefollowing relation t
i (f"
A*Aexp-gT Tmaxr -.2
wheretheconstants havethevalues t
4«6.0(m/s)/Hz
1max
f-3*25Hzη
b-0.33Hz
Thepermitted tolerances aret
hm+10%
[max-
f-+5%m »
Thetolerance withrespecttobisdetermined bythefactthat,in
acoordance withpoint2,5,5*2,,theweighted vibration acceleration
attheseatattachment mustbewithinthelimits s
a_■1.9•••••2.2m/s
h

-k2- Annex II
Appendix 9*P*2
SPECTRAL POWER DENSITY è(f)
Approximate function forthespectral power density ofthevertical vibration
acceleration attheseat attachment ofthereference tractor forolass !•
χ7Ι – ι 1 : 1 1
S I . !•
•β
•s max.6 ,
S"" i7iT~ .
5 / •\S 1 i/– i–A i
4 1 1
j– i–y 11–_L
0 1 2 3 4 5 6
3.25 fm
Frequency f,Hz
\
\
Λ
/

-43- AnnexII
Appendix 10.p«1
Spectral powerdensity ofthevertical vibration acceleration atthe
seatattachment oftheClasBIIreference tractor (point2.5«5»)
Thespeotral powerdensity ofthevertical vibration acceleration at
theseatattachment oftheClassIIreference tractor canbeapproxi­
matelydescribed bythefollowing relation :
(f-f)2
4-4mavexp-5–
wheretheconstants havethevalues :
2N2A=5*5(m/s)/Hz
1S16LX
f-2.65Ha
m
b«0.3Hz
Thepermitted tolerances are:
i*+10%Tmax -
f«+5%
m -
Thetolerance withrespecttobisdetermined bythefactthat,in
accordance withpoint2.5*5*2.,theweightedvibration acceleration
attheseatattachment mustbewithinthelimits :
pa■1*6 1.8m/s

-kk- Annex II
Appendix 10,p.2
SPECTRAL POWER DENSITY è (f)
Approximate function fortheapeotral power density ofthevertical vibration
acceleration atthe seat attaohment ofthe reference tractor for class 2.
Frequency f,Hz

-k5-Annex II
Appendix 11
EXAMPLE OFANEEC TYPE-APPROVAL MARK
(see point 3-5 -)
!aZTs .15Eim
1 II
i'-1 a
1 ?
El_3 . i
i
1 I ?
< •>
g"""T
'ffv\if\k fl|
vyr*èJ
Theseat bearing theEECtype-approval mark above isaseat approved
inGermany under number 1005 .

-4o- Annex III ,page 1
ANNEX III
MODEL POR ANEEC COMPONENT TYPE-APPROVAL CERTIFICATE
Name ofthe
competent authority
Notification concerning thegrant ,refusal ,withdrawal orextension ofEEC
component type-approval foratype ofdriver 'sseat forawheeled agricultural
orforestry tractor#
EECcomponent type–approvai No•••••••••••••••••••••••••••
1*Trademark ofseat ••••••••••••••••••••••••••••••••••••••••••••••••••••••
2*Name and address ofseat manufacturer ••••••••••••••••••••••••••••••••••
3*Ifapplicable ,name andaddress ofmanufacturer 'sauthorized represen­
tative •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
4*Mark ,type andtrade name oftraotor(s )forwhich seat isintended (*)
5«Submitted forEEC oomponent type-approval on•••••••••••••••••••••••••••
6,Test laboratoxy ••••••••••••••••••••••••••••••••••••••••••••••••••••••••
7*Date andnumber oflaboratory report •••••••••••••••••••••••••••••••••••
8.Date onwhich EECtype-approval wasgranted /refused /withdrawn (**)
9*Place ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
10»Date
11,Anote describing the seat ,particularly theamplitude ofadjustment ,
thetotal weight ,thesuspension system characteristics ,type and
thickness ofupholstery anddirections forattachment ,isattached to
this oertifioate *Designs ofthe sides ofthe seat inDINA4form with
alateral and frontal view are enolosed this note *
12«Remarks ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
13»Signature ••••••••••••••••
(*) Where appropriate ,state theclass(es )ofthetractor(s )forwhich
seat isintended *
(**) Delete whichever isinapplicable .

-*7 - Annex IV.p. 1
SEAT INSTALLATION REQUIREMENTS FOR EEC TYPE-APPROVAL OFATRACTOR
1. Every driver 'sseat must bear the EEC type-approval mark and
comply with the following installation requirements :
1.1# The driver ^seat must beinstalled insuch away that g
1.1*1 *thedriver isassured ofacomfortable position fordriving
and manoeuvring the tractor ;
1.1*2 *the seat iseasily accessible ;
1.1 *3»the driver ,when seated inthe normal driving position ,can
easily reach the various controls ofthe tractor that are
likely tobeactuated during operation ;
1.1*4 *nopart ofany oftheseat ortractor components islikely
tocause the driver tosuffer cuts orbruises *
2. The holder oftheEEC type-approval may request that itbe
extended toother types ofseat .The competent authorities
shall grant this extension onthe following conditions :
2*To the new type ofseat has received EEC type-approval ;
2.2 * itha6 been designed tobeinstalled onthe type oftractor
forwhich the extension ofthe EEC type-approval has been
requested ;
2.JJ * itisinstalled insuch amanner astocomply with the instal­
lation requirements inthis Annex .
J* Seats intended fortractors with aminimum distance of
1150mmbetween therear wheels may have the following mini­
mum dimensions with respect tothedepth andwidth ofthe
seat surface :
depth ofseat surface :J00mm
width ofseat surface :kOO mm

-48- Annex IV,p.2
This provision isapplicable only ifthe values specified
for the depth and thewidth ofthe seat surface -i.e. ,mini­
mum of400 +50mmsaid450mmrespectively -cannot beobser­
ved for valid technical reasons .
Acertificate conforming tothemodel shown inAnnex Vshall
beattached tothe EEC type-approval certificate for each
type-approval orextension oftype-approval granted orrefused#

-49- Annex V
ANNEX V
ANNEXTOTHEEECTYPE-APPROVAL CERTIFICATE FORATRACTOR :THEDRIVER'SSEAT
(Article4(2)andArticle10ofCouncilDirective No74/150/EECof4«3.1974
ontheapproximation ofthelawsoftheMemberStatesrelatingtothetype-
approvalofwheeledagricultural orforestrytractors )
Nameofthe
competent authority
EECTvrpe-approval No••••••••••••••••••••••••••••••••••••••••••••••••••,
•••••••••••••••••••••••••••a extension (*)
1.Trademark oftractor
·······························*··································· )
2*Hypeoftractor•••••••••••••••••••••••••••••••••••••••••••••••••••<
3*Nameandaddressoftractormanufacturer
4*Ifapplicable ,nameandaddressofauthorized representative
5.Trademark ofdriver'sseatandcomponent type–approval number••••••••
6.Extension ofEECtype-approval ofthetraotortothefollowing seat
type
7*Tractorsubmitted forEECtype-approval on••••••••••••••••••••••••••<
8*Technical department responsible forverifying conformity forthe
purposeofEECtype-approval ••••••••••••••••••••••••••••••••••••••••<
9*Dateofreportissuedbythatdepartment ••••••••••••••••••••••••••••<
10*Numberofreportissuedbythatdepartment •••••••••••••••••••••••»••<
11.EECtype–approvalwithrespecttothedriver'sseathasbeengranted/
refused(**)••••••••••••••••••••••••••••••••••••••••••••••••••••••••
12«Anextension ofEECtype–approvalwithrespecttothedriver'sseat
hasbeengranted/refused(**)•••••••••••••••••••••••••••••••••••••••
13.Place•••••••••••••••••••••••••••••••••••••••••••••••••••••
14*Date••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
15.Signature ••••••••••••••••••••••••••••••••••••••••••••>••••••••••••••
(*)Whereappropriate ,statewhethertheextension oftheinitial EEC
type-approval isthefirst,second,etc#
(**)Deletewhicheverisinapplicable .