Due to wear at the bush end, I am replacing the layshaft on my C15F. I managed to find a NOS shaft. The Service sheets explain that the innermost cog is a press fit, which also retains the next cog (and the thrust washer I believe). So I need to get this 'pressed' cog off along with its neighbour and the thrust washer, and fit them to the new shaft by pressing on the end one.
Does anyone have any experience of doing this? I have various pullers but they won't fit into the gap between the first and second cog. At the moment my thoughts are that I will need a length of 1 3/4" pipe, to fit over the shaft and bear on the second cog, so that this presses on the first cog, and then I can put this in the vice and press on the shaft end, to liberate the first cog etc. And then for reassembly I can just use a long socket over the layshaft bush end of the shaft to press directly on the small cog and press it home.
Will this work? Will heat help?
It can be done in a large vice if you rest the spinner gear on the top of the jaws then use a large copper mallet on the end of the shaft.
If you have access to a press to push the shaft through that would be preferable.
The fit of the small (4th) gear on the splines on the shaft should be tight. If firm blows from the copper mallet don't budge it resort to a press. Fitting it back on is the same process from the other end of the shaft.