mitchp wrote: L.A.B. wrote:
mitchp wrote:No way could I have done this with the shell in the bike.
Well...I found it was easy to change the layshaft bearing with the gearbox shell in position, no problem at all.
Fair enough. I tried, but couldn't get the case hot enough in the bike to release the layshaft bearing and I don't have a blind bearing-puller/slide hammer.
I did remove the primary drive-so that I could heat the case on the outside in the area directly behind the layshaft bearing, and it didn't take very long to get it hot enough.
The original layshaft bearing is often a reasonably tight fit on the layshaft-as mine was, so it was just a matter of heating the box and gently pulling on the layshaft until it came out-with the bearing still attached, and with the new bearing fitted to the layshaft I used that as the bearing fitting tool as Mick Hemmings demonstrates in his gearbox rebuild video, even though he has the gearbox shell out of the bike, he set the gearbox shell upright before installing both D/S bearings (Mick fits both D/S bearings to their respective sleeve gear and/or shaft and installs them both all in less than 20 seconds
I don't know if you have a bike bench or lift, but it certainly does make this sort of job much
easier having the gearbox at a convenient working height.