The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)

The Craftmans Shop > New from Old

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awemawson:
Yes I think so but the proof will be when I can put 10 bar on the original switch.

I put it all back together again this morning and re-installed it. All seems to work as it should and I’m now going through the myriad of places oil is supposed to emerge checking that they are all lubricated ok

Tiny volumes in some places so not immediately obvious.

awemawson:
This afternoon I made up a test adapter for the pressure switch - M10 x 1.0mm female to 1/8" BSP Male with a female cone in the end.

Assembling the switch to a test pump and guess what - the switch is INNOCENT - apply pressure switch closes release and switch opens.

I was just packing up and processing the photographs when I realised that there was a possible / probable miscarriage of justice - looking at my photograph of the Fluke meter it was on its next to HIGHEST ohms range not it's lowest :bang:

Of course I'd dismantled everything and put all away, but there was nothing for it, there would have to be a re-rial in the light of this new evidence. I put everything back together repeated the test and OK the accused WAS innocent, and released from custody.

. . at least I now have a spare pressure switch.

As for the original fault, I believe that the copper wires had corroded where they were crimped - possibly due to the sulpher in the oil, or maybe other causes, and the outer plastic sheath had held the bits in intimate contact, often adequate and sometimes not. Remember that the plastic sheath is retained by the outer crimp on these spade lugs.

Muzzerboy:
Wow, that DVM came from The Ark! I think I have one of those somewhere although it wasn't badged as an RS product - pretty sure it's a Fluke. I think I got mine second hand in the 80s, which rather dates it.

I recall a time when RS insisted on eradicating any trace of the manufacturer and putting their own part numbers on components instead. That was never going to last. Quite amusing the lengths they went to!

awemawson:
Oi that's my more modern meter - don't be cheeky :clap:

Muzzerboy:
Even my AVO is a fairly modern Mk8. I expect you can trump that too!

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