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88 layshaft bearing

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88 layshaft bearing

Posted by peter_henderson at February 15. 2017

Hi folks, Whilst we have the gearbox out we are considering delving into it to check the layshaft bearing which caused problems on my friends commando , wheel lock up when bearing collapsed . Is this a concern for the less stressed 88 ? There are plenty of other jobs that need doing and one less would be a blessing ! Ok to leave or a curse lurking in the wings ?

Re: 88 layshaft bearing

Posted by john_holmes at February 15. 2017

Had one go in my Commando too but no wheel lock, the failure seems to be related to the taller gearing of the 850 combined with a made in Portugal bearing and the cage distorts and fails from the twisting of the layshaft from the torque applied, the balls all then migrate to one side and fall out. This is much less likely to happen in an 88 but I would still look inside to check the bearing and then you may as well replace it, a wheel lock up is not nice.

Re: 88 layshaft bearing

Posted by Gordon Johnston at February 15. 2017

I had one fail on my 99 at about 150,000 miles. Symptom was kickstart descending on its own. Not a common problem on 88/99 but if the box is out you could change it. Not too difficult.

Re: 88 layshaft bearing

Posted by robert_tuck at February 15. 2017

If you change to a roller you will have to shim the layshaft as there will be lots of slack. Isos shims which need to be openned up in the bore have to be fiddled in at the K.start end . I did it a bit different and shimmed both ends. Much easier to fit the better ball race as recommended by Hemmings.He does not like the roller or shims.

Re: 88 layshaft bearing

Posted by Gordon Johnston at February 15. 2017

The 88/99 Dominators don't need a roller bearing. The better quality ball, as mentioned by Robert is fine. And simpler to fit.

Re: 88 layshaft bearing

Posted by robert_tuck at February 15. 2017

Blimey!! ,Gordon and I agree on something, Either my brain has re-booted or Gordon has mellowed, Or perhaps the trials of Rudge ownership has irrevocably  moulded us into kindred spirits. Mind you I did try Haggis at New year.

Re: 88 layshaft bearing

Posted by peter_henderson at February 16. 2017

Thanks for the collective wisdom folks . Food for thought !

Re: 88 layshaft bearing

Posted by anna jeannette Dixon at February 16. 2017
Previously robert_tuck wrote:

Blimey!! ,Gordon and I agree on something, Either my brain has re-booted or Gordon has mellowed, Or perhaps the trials of Rudge ownership has irrevocably  moulded us into kindred spirits. Mind you I did try Haggis at New year.

hello bearing fitted to the model 88 were Of Ransom and Marles Make  and they made the finest bearing you could lay your hands on  and there still available if you know where to look    and  it will be no good trying Mick Hemmings  or Norvil  Or Andover Norton Or Rgm Motors  They will not have them in stock  yours  anna j  
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