i managed to sneak an hour today and stripped it, so now i have a box of assorted nuts and studs, none of which are straight or fit well and another box of metal bits for examination...
The whole engine seems to have an alignment problem, the cylinder is not aligned with the cross head which in turn is not aligned with the main bearing mount. i guess that is why everything is so loose as this was the only way to get it to turn over.
The base plate is bent, not sure if it just the way it was cast or if they bent it to try to align stuff

Anyhow none of the mounting holes line up so i am tempted to start with a new base and machine it myself.
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Next nightmare is the cylinder and piston assy. the small end is scrap and the piston rod bent, so they go in the 'remake' pile. I had hoped the cylinder would be OK as the piston kinda fitted and the ports looked ok, but closer inspection revealed the bore is at an odd angle and definitly not round, plus the end caps are a real mess with multiple srews fitted to try and make up for the bad machining and subsquent leaks. Not sure if i should try and fix it or bin it yet.
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The cross head slides are a bit bowed and some dodgy holes but at least i have found one (or is it four) part/s that can be fixed up.
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Ade