14-01-2021, 10:38 AM
Peter, it's fairly common practice to re-face a worn layshaft bush (easily done by hand on oiled emery paper on a flat surface) and arrange a suitable shim behind it rather than replacing. The tricky part is drifting out the bush without damaging it & it may be worth your while fashioning a simple tool or drift to do this. Minor burrs can be filed out.
You may have discovered by now that most of the close-fitting parts go in and out much more easily if the case is warmed up first. However make sure it's all settled to room temp before measuring the end float or you may get a false reading.
Finally just a heads-up that it's impossible to re-assemble the box with the layshaft already installed as per Terry's beautiful photo... Pop the cogs in the bottom of the box, install the upper clusters, then slip the layshaft through the lay gears as last step. Sorry if teaching to suck eggs...
You may have discovered by now that most of the close-fitting parts go in and out much more easily if the case is warmed up first. However make sure it's all settled to room temp before measuring the end float or you may get a false reading.
Finally just a heads-up that it's impossible to re-assemble the box with the layshaft already installed as per Terry's beautiful photo... Pop the cogs in the bottom of the box, install the upper clusters, then slip the layshaft through the lay gears as last step. Sorry if teaching to suck eggs...