Clutches shown in Numerical order - Scroll Down for Data
Early B250
1955 to 1959
B3040
B6919
=
705525R91
B7205
10'' x 1 3/8'' 10 spline
NOT FITTED
B2970

=

ST738
B3640

=

537290R91
Late B250 (1959 onwards)
B275 with 10'' Single clutch
B3041
B2324
= 3040412R91
10'' x 1 1/8'' 10 spline
B275 with 11'' Single clutch
(1/2" thick plate)
N / A
VERY RARE MODEL
B1040
=3062713R91
11'' x 1 1/8'' 10 spline
(1/2" thick)
B250, B275, 354
with 11'' Dual clutch
B3042
B4175
=
3047747R93
(Uprated type wide press plate)
Includes PTO plate
B2973
= 709639R94
11'' x 1 1/8'' 10 spline
(Narrow facing)
B2340
=
709640R92
9'' x 1 3/4''
10 spline
414, 434 (less torque amplifier)
444, 374, 384
with 11'' Dual clutch
B3043
B2974
= 3108790R1
11'' x 1 1/8'' 10 spline
(Wide facing)
Following Models when fitted with 11'' clutch:
384, 454, 464, 474, 574, 674
475, 484, 584, 684, 784, 884
385, 485, 585, 685, 785, 885
395, 495, 595, 695, 795
2400A, 2400B, 2500A, 2500B,
3210, 3220, 3230, 3500A
Flywheel Pot Depth = 36.3mm (1.429")
B3044
CERAMIC
OPTION

B3045
ORGANIC
B2977
=
70716C1
92602C92
B2975
CERAMIC
=
70093C91
3121507R94
11'' x 1 1/8'' 10 spline
OPTION
B3619
ORGANIC
Recommended
for ALL applications
= 1002338C1
NOT
FITTED
B6627

=

85104C91
Following Models when fitted with 12'' Rockford clutch:
454, 474, 574, 674
475, 484, 584, 684, 784, 884
385, 485, 585, 685, 785, 885
395, 495, 595, 695, 795, 895, 995, 3210, 3220, 3230
Plus ALL: 985, 4210, 4220, 4230, 4240
B3046
B7470
=
85025C2
1 5/8" x 10 spline
B7471
CERAMIC
= 85026C1
12'' x 1 1/8'' 10 spline
554 -564, 624, 654, 644, 654
(when fitted with Dual Clutch)
From September 1978
724, 734, 744, 745, 754
824, 834, 844, 845 Equipped with Dual clutch
B3047
CERAMIC
B6849
=
3137666R98
1964056C2
Includes PTO plate
B8471
CERAMIC
Sprung Hub
12'' x 1 1/8'' 10 spline
B6851
= 3058404R93
ORGANIC
DISC TYPE
P.T.O.
11" x 1 3/4"
22 Spline
B7204
(MAIN)
= 3147877R91
B7157
(PTO)
= 3142880R91
576, 660, 696, 706, 756, 766, 786
806, 826, 856, 866, 886, 966, 986, 2706, 2756, 2806, 2856, 3088, 3288, 3688
(12'' Clutch)
B3049
Uprated type
B7465
=
405300R92
B7472
CERAMIC
= 384395R92
12'' x 1 3/16'' 11 Spline
NOT

FITTED
B2329
=
69789C91

(Models with
Standard Clutch)
B7154
=
524598R91
976, 1066, 1086, 1206
1256, 1456, 1466, 1468
1486, 4100, 4156, 4166, 4186, 21206, 21256, 21456
(14'' Clutch)
B3050
B1041
=
390254R94
B1042
CERAMIC
= 393117R92
14'' x 1 3/16'' 11 spline