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1961 dommi
#748134
09/06/18 4:12 pm
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Joined: Sep 2011
Posts: 103
anji mehra
OP
BritBike Forum member
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OP
BritBike Forum member
Joined: Sep 2011
Posts: 103 |
Hi Can anyone tell me the rear hub bearing nos. Thanks Anji Pune India
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Re: 1961 dommi
[Re: Rohan]
#748324
09/08/18 6:18 am
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Joined: Sep 2011
Posts: 103
anji mehra
OP
BritBike Forum member
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OP
BritBike Forum member
Joined: Sep 2011
Posts: 103 |
Hi Rohan It's one single row & one double row on the sprocket side. Need the nos as sometime in the past someone has replaced the bearings with non original. Result is that once I tighten the wheel nuts onto the drum, the wheel is difficult to rotate. Can't remember if I have requested this info before. Anji
Last edited by anji mehra; 09/08/18 6:22 am.
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Re: 1961 dommi
[Re: anji mehra]
#748335
09/08/18 8:42 am
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Joined: Dec 2004
Posts: 10,218
kommando
BritBike Forum member
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BritBike Forum member
Joined: Dec 2004
Posts: 10,218 |
Wrong order of assembly, shortened or missing spacer is much more likely than different bearings as the metric ones used are so common.
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Re: 1961 dommi
[Re: anji mehra]
#748337
09/08/18 9:33 am
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Joined: Aug 2001
Posts: 2,738
Rohan
BritBike Forum member
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BritBike Forum member
Joined: Aug 2001
Posts: 2,738 |
You asked about wheel bearings before, but didn't say why ? I too doubt the bearings would be wrong - but the spacers and axle have to lock the whole assembley tight when tightened up, without causing anything to bind or lock up.
Do you have the speedo drive on that back wheel ? If the spacers are not correct for that, it can cause these sort of problems. There is a 'top hat spacer' through the centre of the speedo drive - that is essential. ?
I have a similar back wheel assembly that could be accessed to photo the spacers and speedo drive, if it would help. Better if we see your bits first.... ?
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Re: 1961 dommi
[Re: anji mehra]
#748339
09/08/18 10:04 am
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Joined: Jun 2005
Posts: 49
iansoady
BritBike Forum member
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BritBike Forum member
Joined: Jun 2005
Posts: 49 |
Even with the correct spacer you often get this tightening up initially. The right hand bearing is positively clamped into its recess via the retaining ring. The outer race of the left hand (double row) one does not bottom into its recess to allow for slight manufacturing variation. The longitudinal location is via the central spacer.
Hence when the spindle is initially tightened this pulls the left hand bearing into the recess slightly. This can cause a feeling of tightness as the outer finds its own position. Normally this tightness disappears once the wheel is spun a few times, or indeed the bike is ridden for a mile or so.
If it doesn't there is something wrong.
Ian.
1952 Norton ES2 1982 Moto Guzzi V50
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