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F-D crown wheel input bearing adjusting shim Sat Feb 08, 2014 2:34 pm
TIV
Silver member
The F-D I got from Motorworks is basically in good condition. Splines, pinion and crown wheel are excellent. Among the stuff I got from the Police when I bought the bike were the crown wheel input roller bearing and the big crown wheel output bearing (OEM), as well as an output seal.
Since the big roller bearing has developed slight roughness and a tiny amount of a play, I decided to use the opportunity to change both bearings and the output seal, as well as paint the housing and tidy everything up.
When I pulled off the roller bearing I damaged the adjusting shim behind it. There should be no need to re-shim the drive if I use the OEM bearings I have got, the big original adjusting shim (nr. 2 in diagram) and the same thickness shim (nr. 4 in diagram) in place of the one I damaged.
When I measure the damaged shim with an accurate Calliper, I measure it 2,360 where it is thinnest and 2,400 where it is thickest. From this I drew the conclusion that it originally must have been 2,400.
Since the big roller bearing has developed slight roughness and a tiny amount of a play, I decided to use the opportunity to change both bearings and the output seal, as well as paint the housing and tidy everything up.
When I pulled off the roller bearing I damaged the adjusting shim behind it. There should be no need to re-shim the drive if I use the OEM bearings I have got, the big original adjusting shim (nr. 2 in diagram) and the same thickness shim (nr. 4 in diagram) in place of the one I damaged.
When I measure the damaged shim with an accurate Calliper, I measure it 2,360 where it is thinnest and 2,400 where it is thickest. From this I drew the conclusion that it originally must have been 2,400.
Last edited by TIV on Sat Feb 08, 2014 7:25 pm; edited 1 time in total (Reason for editing : typing error)
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1936 Harley Davidsson 750 (sold), 1964 BMW R69S (sold), 1973 Suzuki RM400 (sold), 1972 Triumph Bonneville (sold), 1971 BSA Thunderbolt (sold), 1972 BSA Lightning (sold), 1977 Yamaha XS650 (sold), 1971, BMW R75/5 (sold), 1973 BMW R75/6 (sold), 1984 BMW R100RT 1992 Yamaha FJ1200 ABS (sold), 1990 Harley Davidson Electra Glide (sold)
1990 BMW K75RT Ex-Police (owned now)
2004 BMW R1150RT iABS (owned now)
Cheers TIV
