Pinion shaft diameter

[Roger]

I take it there's oil in it?

What you say doesn't sound great, though a bit of noise is to be expected even on a good 'un.

Good idea to take a look anyway, a blown CWP is a bit of a disaster at the roadside, one of those things you can't just get out and fix.

I believe the 1" shaft can be fitted in a later casing 'simply' by adding a sleeve; and likewise a later pinion shaft can be made to fit an earlier casing by turning off the 1 1/8" section. Precision machining work is called for though, you're much better off with the right bits.

I'm sure Robert Leigh had a good used 5.25 CWP for sale on here recently, as far as I know he still has it. Sorry I can't immediately recall whether it was 1" or 1.125".

Chris, I have drained the oil out and let it settle in a shallow dish I then decanted it into a container.
The remains left had very fine brass particles in it, but not a great amount.

Roger