tors an mac in s.
Trang 1v r e s and wheels
Part 1 '&r s
Sec tion 4 Ag ri c u l tu ra l tr a c tor and m achine t yres
ICs 43.0 40.6 0; 8 1 0.3
Part 1:
1996
1996
IS0 7 8 6 7 -2 :
Trang 2AmdNo
The prep ratio oft his Britis h Sta d rd was e n tru ste d to Tec hnic al C o mmite
AW4, wsand w heel s for mo to r vehic les , up o n w hi c h the folowing b dis w ere
rep rese nted:
Ag ric ultural Egin e s’ As s oc iation
Automo ie As s oc iatio n
Britis h Industri ai h c kAs s oc iation
Britis h Pr s u e Ga ge Man u factu ms’ As s o c iation
Britis h Rubber Ma ufacturem’ As s oc iation
Co nfederati o n ofPas eng er “bnsp rt U
Dep arhnent of’Rans port
Fi- eg t ’Rans port As s oc iation
I n stitu te ofRo d ’Ransp o rt En ine m (Inc )
Motor Cycle In ustry’s As s oc iation ofGreat Britain LM
Motor Industry Res earc h As ocion
Natio al Qre Dis trib tom’ As s o c iation
Retre ad Man fa turer ’As s oc iation
Ro d Ha la e As s oc iation Ld
So c iety ofMotor M anufac turers an d Mers Ltd
This Britis h sta dard, having
ben prpaed u der the
d irection ofthe E gi er ng
se t or B a d, was p b shed
u de the authority of th e
Stan a ds B a dan cme into
efct o
15 October 1 99
Q BSI 1996
Amen ment s is ued sinc pu l cat ion
The fo üo wing BSI r efer enc es
reat to the wok o this
st andar:
Commite referene A W4
Draffo r co m m ent 9 ~ 0 3 0 D
Trang 3Co ntents
Commite s r sp onsib le
National for word
p age
Inside frontco ver
i i
Spe ification
2 N o rm ativereferences
3 D en itions
4 Se rv i c e de sc ri pti on
6 ~loadi-dtings
6 Refe enc intlation ~r es ur es
Annexes
A @formative) Ba si c tyr loa s
B (informative) B iblo rap y
4
8
*
m
*
Tabl e s
1 L a indices (LI) an tyr loa canyin g c a pa c i ti e s( TLCC) 2
A Load pe t r a r fe enc spe d A2 an inflation pressur -‘95’ series
tractor tyr s for s e i al cuitiv tion work
A 2 Load pe tyr at r fe enc s e d A an inflation p ressur - ‘8 ’ series
A.3 Load per tyea r fe enc s e dA an inflation pressur -‘ 75’ seis
A.4 L a per tyre atr fe enc spe e d A an inflation p ressur -‘70’ sris
A 6 Load per t r atr fe enc spe e d A an inflation pr s ur -‘6’ seies
4
~
Trang 4N atio nal foreword
Thi s Su bsec ti o n ofBS AU 50 h s be n prep red b Te h ical C ommitte AW4 an d is
i denti cal to I 0 7 67-2 : 19 6 @w ça d rims (mt& se ies) for a ric lEumltractors
a nd machi ne -Part 2 : ser vic íiesc iptwn an d loadratin s,p u b l i shed by t he
Inkdord O rg anization for Standardi z ati o n (SO)
B S AU 50 is p u b l i shed i n fou r Park
Partl Qln? s
P a rt 2 whe ls a d rim
Part3 vlves
P a rt 4 Rim profiles a d di-ns
I 0 7 6 spcfes re qu i re ments for metric s ris tyres an d rmsfor ariclual
t at r an d mac hi nes and I 0 86 seiisre qu i re ments for agric ult ural tra tor
d rivewhe l tye
Cros -r f r nc s
Pu lc tion r fe r d to Co r spon ing British Stan a d
B AU 50 @w ç a d whels
Partl@w.ç
Se c ti o n 4 Agri cul.tuml Cmctora d mach ne ty es
Su bsec ti o n 4.5 a : 19
6 S peaficatio
for desig atio s,
dimensions, m arking a d t@!m c o di nati on fo r m ei9- k
series ty es
( i denti c al)
P a rt 4 Rim profies a nd d i e
Se c ti o n 4 A gric ltur altrac tor a d m c ine rims
Su bsec ti o n 4 la : 195 Spmificatùm for pl y-ratin mark d
s?-ìÆs rims
( i denti c ai )
IS0
7867-1: 19 6
I 0 4 513 : 19 4
The Te hnid
Comi t e h s
review ed the p ro v i si o ns
of
IS 4 231, to whic h
n on n ative referenc e is ma e in the text, an d h s deci ded th t they a re ac eptabl e fo r
use i n c o njunc ti o n with thi sanàrd
Com pl i an c e with a Brit ish Standar d does n t of itself conf r immu ity
Trang 5BSI BS*AU* Q:PTL :SUBSEC*4-b 96 1624669 0564129 520 U
BS A U 60 : Pa t 1 : Su bse c ti on 4 6 :1996
Tyre s and rims (metric se rie s) f or agriculturaltractors an d
-Part 2:
This p rt of IS0 7 6 est ab lish s th servic e d sc rip -
tio , th tyr e lo d ratin s in b as ic a d s p ecial ap p li-
c atio s a d ref er en e inflatio pres ure in reme ts
for th metr ic series of ty res p rima riy inte d d for
-agric ultural tra tor s a d mac hin s
_I
II
II
_ It ap p lie s to b ias -b e lte d, dia o al a d ra ial ty res
E mo nte d on 5" ta e re d rims, as s p e cifie d in IS0 4 51-3
It also ap p lie s to difere t c n e ts a d ty pes of t y r es
a d rims; in t hese c se s, h wever, ap p rop ria te load/
* s p e e d-c rve s a d r ef eren e inflatio p res ure in-
creme t s wi b esta b lish d a d a de d
-_
*
C
Basic tyre loa dca r r y in c ap ac ities for range s of exist
in tyr es are given in a ne x A
NOT E 1 Designation a d m arki ng of th me tric seri es is
d efin d in IS0 7 6 -1 Co e (ply ratin ) m ark d seri es of
tyres a d rim s for a ric ltural tra to rs a d m achin es are
sp cifie in IS0 4 51 -1, IS0 4 51-2 a d IS0 4 51 - 5 Ser-
vice d escription (l oa ind x -sp e s ymb ol) marking of
existin seri es of a ric ltural tra tordrive -whe e l tyres i s
giv n i n IS0 8 6
2 Nor mativ e references
Th f olow in s tan ards c ont ain p rovisio s w hic ,
t hr ou h ref erenc e in this text, c ns t ute p rovisio s o f
this p a rt of IS0 7 8 6 7 A t th time of p ub lic at io , th
e it io s in ic at ed were v ld All s tan ards are su je t
to re vis io , a d p a rt ies to a gr eeme ts b as e d o this
p art o f IS0 7 6 are e c ourage to in estig te th
p os ibi ty of ap p ly in th most rec nt e itio s of t he
s tan ards in ic at ed b low Memb rs of IEC a d IS0
maint ain re isters of c urrent ly valid Int ernat io al S ta -
d rds
IS0 4 22 -1 : 19 8 9 , Definitio s ofsome terms us din
the tyre industry - Part7: Pneumatic tyre
IS0 42 5 1- 3 :19 9 4, Tyre (ply ratin markeds rie ) and
rims foragric lturaltractors andmac ine -Part3:
Rims
IS0 7 8 6 7 -1 :19 9 6 , Tyre and rims (metric s rie ) for
agric ltural tractors and mac ine
-Part 7 : Tyre
de ig atio , dimensio s, markin andtyre/rim c ordi
natio
3 D e finit io ns
For th p rp ses o f this p art of IS 7 8 6 7 , th d fi-
nitio s given in IS0 42 2 3 - 1 a d IS0 7 8 6 7 -1 ap p ly
4 Service description
Th servic e d sc ptio s hal b in ic a ted as folow s:
Lo ad in e x Sp e ed sy mb l
4.1 Lo d inde x
Th load in e x is a n meric al c od assoc iat ed with a
ma ximum lo d a tyre c n c ry at t he sp e in ic at ed
b y its sp e sy mb l u d r service c on itio s s p eci-
fie b th tyr e manufac t urer
Th c orrelat io b twe n lo d in ic es and tyr e lo ad-
c arry in c p acitie s s hal b as given in t ab le 1
Trang 6B S AU 80 : Pa t 1 : Subs ectio n 4.6 : 1996
T able 1 - L oa d indic s (LI) a dty r e loa -c r r y ing ca pa itie s (T CC)
U
O
1
2
3
4
5
6
7
8
9
10
1
12
13
14
15
16
17
18
19
20
21
22
23
2
2 5
2
2
2 8
2 9
3
31
3 2
3
3
3
3
3
3
3
4
4 2
4 5
4 7
5 0
51.5
5 3
5 5
5 6
5 8
6
6 1,5
6
6
6
6
7 1
73
7
7 5
8
82.5
8
8 5
9
92,5
9
9 5
1 O0
10 3
10
1 o
1 2
1 5
1 8
121
12
12
13
13
U
4
41
4
4
4
4
46
4
4
49
5 0
51
5
5
5
5
56
57
58
59
60
61
6
6 3
6
6 5
6 6
6 7
6
6 9
7
71
7 2
7
7
7
7
7
7
7
T CC
k
14
14
15
15
16
16
17
17
18
18
19
19
2 00
20 6
212
21 8
22 4
2 30
2 36
243
25 0
2 7
26 5
272
28 0
29 0
3 0
3 7
3 1 5
3 25
3 35
3 4 5
3 55
36 5
37 5
38 7
4 00
41 2
4 25
4 37
LI
80
8 1
82
8 3
8
8
8
87
8 8
8 9
9
91
9 2
9 3
9
9 5
9 6
9 7
9
9
1 O
1 o 1
10
10
10
10
1 0
10 7
10
1 o9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
4.2 Spe d symbo l
Th s p e e d sy mb l is a sy mb l in ic at in th sp ee at
whic th tyre c n c ry a lo d c orresp on in to its
in e x u de r servic e c on it io s sp cif ie b y th tyre
manuf ac t urer
Th c orrelat io b twe n sp ee sy mb ols a d ref er -
e nc s p ee ds shall b e as given in ta b le 2
5 Tyre load r atings
5.1 B asic tyre loa ds
B asic t y r e lo d is th tyre loa dca r ry in c p acity in i-
cat ed b y th ty re's load in ex at th referenc e sp ee
ncc
k
4 50
46 2
4 5
4 7
5 0 0
51 5
5 30
545
5 60
5 80
6 00
61 5
6 30
6 0
6 0
6 90
71 O
7 0
7 0
7 7 5
8 00
8 25
8 0
8 7 5
9 0
9 2 5
9 0
9 75
1 O0
10 0
10 0
1O9
1 2
1 5
1 8
1215
1 2 50
1 2 85
13 0
13 0
LI
12
121
12
12
12
12
126
127
12
12 9
13
131
13
13
13
13
13
137
13
13
1 4
141
14 2
143
1 4 4
14 5
14 6
14
148
14 9
1 5
151
15
15 3
15 4
15 5
15 6
15
15
15
T CC
k
14 00
14 50
1 5 00
1 5 50
1 6 0
1 6 0
1 7 0
17 0
1 8 0
1 8 0
1 9 0
1 95 0
2 O0
2 0 0
2 12
2 18
2 2 4 0
2 3 0
2 3 0
2 4 30
2 5 00
2 575
2 6 50
2 7 5
2 8 00
2 9 00
3 O0 0
3 0 75
3 15
3 2 5 0
3 3 0
3 4 0
3 5 0
3 6 0
3 7 50
3 8 5
4 O 0
4 12
4 2 5 0
4 37 5
LI
16
161
16
16
164
16
16
16 7
16
16
17
17 1
17
17 3
17
17 5
17
17 7
17 8
17
18
181
18
18 3
18
18
18 6
18
18
18
19
191
19
1 9 3
1 9
19
1 9
197
19
19
TLCC
k g
4 5 0
4 6 5
4 7 0
4 87 5
5 O0
5 15
5 3 0
5 4 5 0
5 6 0
5 8 0
6 O0
6 15
6 3 0
6 5 0
6 7 00
6
9 0
7 10
7 3 0
7 5 0
7 7 5 0
8 O0
8 2 0
8 5 0 0
8 7 50
9 O0
9 2 5 0
9 5 0 0
9 7 50
10 O 0
10 3 0
10 6 0
o
9 0
1 2 00
1 5 00
1 8 0
2 15
2 5 00
2 8 0
13 2 00
13 6 00
L a f or d al t y r es e u ls 1,7 t imes th lo d for a
sin le ty re
For b as ic tyre lo ads f or ra ge s of existin ty res, se e
a ne x A
5 2 T y r e a pplca t ions ot he r than at re fe re nc
s p e ed
Fo r ap p lic at io s with ut hig a d sust ain d t orqu s,
inc lu in ro ad transp rt , th lo d/s p ee d relat io ship is
given in table 3
Th tyre manufac t urer c onc erne s hal b c nsulte
f or th ac tual p res ure to b e use wh n ap p lyin th
Trang 7~ S p d
km/h
Th e rim/wh el ma nuf act ur er shal b c nsulte for
c nf ir ma t io of th stre gth of th r imiw he l for th
int en e servic e
15
12
1 1
10 2)
10 3
1 O0
9
9 1
T able 2
- Spe
ds mb l a d r ef er en e s e d
Ref er enc e spe d
kmh
Sped s mbol
Al
A
A3
A4
A5
A6
A 7
A8 1
B
5
10
15
20
25
3 0
3
4
5
NOTE-This ls t of s e d s m bol s is n ot re trictiv ; oth r cat
e ories may b d etermin d l ater
1) Re omme d d s e d s mbol for tyres fo r ag ri cu l tural trac
tors an mac in s
T able 3 - L a / spe d r elation hip
10
15
2 0
25
3 0
3
4 0
4
5
1 i Ex res d a
2) This als apl
tai n ed torqu es
Ma imum t yre loa 1)
Tyros wit h s p d
s mbo l A
( 1 O km/ h refere c
sp ed)
1 O0
9
8
8
8
7
73
-Tyr- with sped
s mbol AS
(4 kmhreferen ce
sp e )
p rc n tag e of th bas
? for al fie ld ap i i cati
ic
O
; tyre load
In wit h hi g h an sus-
5 3 lyre a pplca t ion o n c ombine ha rve st e rs
(A8 ty r es only)
On c mbin ha r v ester s in c y c lic loadin ap p lic at io ,
exc pt hi sid c omb in s, a load of u to 17 % of t he
basic tyr e lo ads is p rmite f or sp e s u to 10 km/h
with a inflatio pr es ur e inc rease of ap prox ima tely
30 %, in c nsulta tio with th tyre ma uf a ct urer This
load inc rease shal in lu e al p s ible field a d use r
mo if ic t io s tha t inc rease th v ehicle mass a d shal
a ply o ly to load inc reases w hic oc c ur d rin th
harvest in p roc es Whe n t in c y c lic app lic atio (as
for insta nc wh n grain ta nks are empty d rin t rans-
por t) th loa ds in t a ble 3 ap p ly
For hi -sid op erat io s o er 1 ' (2 %) slope, o ly th
b sic tyre lo ads are p r mite
Th rim a d w he l ma nuf a ctur er shal b c nsulte
c onc ernin th str en th of h w he ls
6 Referenc e inf lationpressure
Th e folow in referenc e inflatio pr es ur es are rec -
omme d d for basic tyre lo ads of difer ent ra ge s of
tyres (metr i series) for a gr ic lt ur a l tr actors a d ma-
chin s
10 kPa
12 kPa
14 kPa
16 0 kPa
2 00 kPa
24 0 kPa
2 0 kPa
3 0 kPa
3 0 kPa
40 kPa
4 0 kPa
NOT E 2 T hese referen ce inflatio n pres ures a re for ba sic
tyre load of dife re nt ra g s of metric a ric ltural tyres
Op rati n g pres u res ma b dife rent
Trang 821019 R 4
R 4
B S AU 50 : Part 1 : Su bse c ti on 4.6 : 1996
(infor mative)
Ba sic tyre loads
A.1 This a ne x give s inf or mat io additio al to 5 1
A.2 Lo ad in ic es a d b sic tyre lo ds for ra ge s of existin ty res are given in t ab les A.l to A.5
R 4
T able A - L oa d per tyre at re f e re nc spe e d A2 a d inflation pres ure - "9 " se rie tra tor tyre fo r
spe cia l c ltiv tion work
L a index
Tyre rire d sig ation
R 3
R 4 4
2 019
Ba ic tyre load
k
Reference inflat io n pressurel)
kPa
R 48
18 19
R 4
3 0
4 0
1 Th inflation pre su re is a m i n i m um referen ce value for th load g i ve in th e tabl e Th tyre m an u facturer c ncerned s al l b c n u l te
so tth actual pre s re t o b u se in practi ce
Trang 9L a i n d ex
Tyro size d sig ation
T able A.2 - Lo ad pe r tyre at re f e re nc s e d A8 a dinflation pre ss re - "8 " series tyre
I
Ba ic ty r e lo ad Referen ce in a t ion pro ssurel)
*
m
*
1
L a i n d ex
Tyro size d sig ation
T able A.3 - Lo ad pe r tyre at re f e re nc s p e ed A8a d inflation pre ss re - "7 " s eries ty r es
Ba ic t yre load Referen ce in a t ion prossurel)
620 75 R30
R 3
~ ~
R 26
1 0
620 75 R 30
R 3 4
Il Th inflation pre su re is a m i n i m um referen ce value for th load g i ve in th table Th tyre m an ufactu rer c ncerned s al l b cons lte(
tb u t th actual pre s re t o b u se in practi ce
Trang 10L a in e
lyr si ze d sig ation
Table A.4 - L oa d per tyre at r ef er enc spee d A8 a d inflationpre ss re - "70" se rie ty r es
Ba ic tyro loa
Reference infla tio n pressurel)
1 0 0
R 20
R 28
R 2 0
R 28
R 2 0
R 28
R 2
R 3
R 3
R 3
R 2 6
R 3
R 3
5 2 0 P O
R 3
R 2 6
12
R 4
6 2 0 P O R2
1) The inflatio n pre su re is a m i n i m um referen ce value fo r th l oad g i ve in th table Th tyre m an u factu rer c ncern ed sh all b c n sul te
ab u t the actu al pre s re to b u se in practice
Trang 11L a in e
lyre sit e d sig ation
T able A.5 - L a per tyre at r ef er enc s e d A 8 a d inflation pre ss re - "6 " s eries tyre
Ba ic tyro load
Referen ce inflation pre s re' )
R 2 4
R 28
4 016
~
R 2 4
R 2
4 016
~
R 2
12
R 3
R 3
R 2
14
2 5 00
16
R 3 8
I) Th inflation pre su re is a m i n i m um refere c value for th load g i ve i n th tabl e Th */re m an u facturerc ncern ed h al l b c n sul te
ibout th actual pre s re tob u se in practi ce
Trang 12B S I BS*AU*SO:PTL :SUBSEC*4-b 96 I1624669 0564336 7b0
B S AU 60: Pat 1 : Su bse c ti on 4.6 :19 9 6
(infor mative)
I1 I
[21
I
IS0 4 51 -1 : 19 9 2 , Tyres (ply ratin mark dseries)
a drims fora ric lturaltra tors a dma hin s
-Part1: Tyre desig atio a ddime sio s
IS0 4 25 1 - 2 : 1992, Tyres (plyratin mark d series)
a drims fora ric lturaltra tors a dma hin s
-Part2:Tyre lo d ratin s
IS0 425141992, Tyres fply ratin mark dseries)
I 41
[51
a drims fora ric ltural tra tors a d ma hin s
-Part4: Tyre clas ific tio a d n me clature
IS04 51-5 99 , Tyres fplyratin mark d series)
a drims fora ric lturaltra tors a dma hin s
-Part5:L og skid ertyres
IS0 8 6 : 1 992, A gric ltural tra tor driv -wh el
tyres - Servic descriptio (lo dinde -sp ed
symb lmark d tyres