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Interesting modification/bodge,what do you think?
Posted: Mon May 30, 2016 12:04 pm
by kevspeed
Quite a while back i picked up a job lot of Lambretta stuff,picked out the parts i needed there and then,and stashed the rest away for future use.
Today i dragged the stashed parts out as im going to put together a standard 150 motor to use as a spare.
Amongst the stuff is a fairly tidy Li 150 casing,complete with endplate/gearbox/and layshaft all fitted.
Upon dismantling,to check exactly what gearing was fitted i found this modification/bodge to the layshaft/endplate bearing!
It all turns very smoothly and is all a very nice fit. The bearing is of Japanese manufacture and is a 6201,which is also the size for the front wheel.
What do you all reckon?,good,bad,safe,dangerous,clever,bodge?
Re: Interesting modification/bodge,what do you think?
Posted: Mon May 30, 2016 12:35 pm
by a.lo.v2
must be a pig to seperate, doe the endplate come off the bearing or come off the layshaft with the bearing or bring the layshaft out as well? shimming?
Re: Interesting modification/bodge,what do you think?
Posted: Mon May 30, 2016 1:40 pm
by kevspeed
This particular one left the bearing on the layshaft which i then managed to get off by gently tapping.Its a lovely fit,no play,so someone took the time to do it properly!
Re: Interesting modification/bodge,what do you think?
Posted: Mon May 30, 2016 1:43 pm
by Adam_Winstone
MB used to do this to repair the bottom bearing face of the gearbox xmas tree. It was a good way to salvage the part and return it to use. More an engineered fix than a bodge. Looks like someone has done the same to the end of the layshaft for similar reason.
Adam
Re: Interesting modification/bodge,what do you think?
Posted: Mon May 30, 2016 3:32 pm
by 10 inch Terror
That looks very well done. I certainly wouldn't call that a bodge.
Re: Interesting modification/bodge,what do you think?
Posted: Tue May 31, 2016 6:41 pm
by wack 63
I've often wondered why Innocenti didn't do this but then again look how small the layshaft has been machined down to, 12 mm? They must have had a reason to use a bush and needle rollers in the endplate even if it was just to gain some meat on the layshaft stub. I'm not aware if the layshaft can be machined and a bush fitted like the cluster to repair pitting.
Re: Interesting modification/bodge,what do you think?
Posted: Tue May 31, 2016 7:41 pm
by Doom Patrol
I think it can. I'm told MB do a special bush for a pitted layshaft.
Re: Interesting modification/bodge,what do you think?
Posted: Tue May 31, 2016 8:04 pm
by Rich_T
Please check the load ratings for the needle original needle roller v the ball bearing replacement. You may well find the needle roller has much more load capacity.
Re: Interesting modification/bodge,what do you think?
Posted: Tue May 31, 2016 8:53 pm
by kevspeed
wack 63 wrote:I've often wondered why Innocenti didn't do this but then again look how small the layshaft has been machined down to, 12 mm? They must have had a reason to use a bush and needle rollers in the endplate even if it was just to gain some meat on the layshaft stub.
That's what I was thinking when I saw this!,I'm now wondering,if I did use this,how long would it last,and is the machined end strong enough?
