1975 broomwade compressor, might need some help!

Might need new belts!



Got to love some stenceling

First thing to do is remove the large bungs in the side of the receiver, so you can inspect the inside for rust.
The valve at the bottom is for draining moisture from the receiver.
The line from compressor to receiver would probably have fins to cool the air.
Often industrial compressors are set up with multiple outlets to serve different needs
Ttfn Glenn

In what was was it knackered? Just wondering what to look out for.
This seems to have not done much work though, andnthenlinknpipe was missing so he could drop oil in it and turn it over to stop it seizing.
It's been in his family from new and he always ment to put it back together but never got round to it.

It's basically just how you want to buy a classic car, unfortunately it's a compressor though 😂

Do you remember how it all links up?

Edit, I guess there are only 3 real points of failure, big/small end knock causing noise, rings/bore meaning low pressure, or valve sealing meaning it produces oil mist?

Pitting is what you are looking for, just the bottom really as that's where the water sits.
If there is a port into the cylinder head, this may be a compressor where, the motor runs continuously and the intake valve is held open once pressure is reached, to reduce the load
Ttfn Glenn

I have been poking and proding this. Washed the majority of the loose stuff off and dragged it into the workshop.

Took the bungs out the tank. It's a bit surface rusty, apart from the bottom, which was a bit wet with some accumulated flakeyness. Hovered it out and I'm pretty sure the wetness is oily.

It looks about how I'd expect the inside to look to be honest.
I scraped the tank wall in an area i could see and the surface rust doesnt seem to have pitted anything.

I think I'll get it down to a bare receiver, seal off all the holes, and swill it out with water based degreaser.

I might then put some chain in in and roll it round the garden for a few hours (wish I hadn't sold my cement mixer!).
See if that cleans it well enough to inspect more thoroughly.
I didn't see anything that looks concerning though.

I took the belts off. Pump turns over freely and makes pumpy noises.

Motor runs nicely.

I'll test the pressure switch on my other compressor because that won't care if it doesn't shut it off.

Other things I've discovered...
The inlet into the non return valve is 1/4 bsp, which is nice.
The outlet from the pump is bigger than 3/8.
The outlet from the head is smaller than 1/4.
The pcl snap connector on the front is bigger than normal.

Once I've cleaned the tank a bit ill post some pics of the inside.
Once I've cleared the bench I'll take the pump apart and see what it's like inside. The manual has all the clearance specs etc.

Then, if that all checks out I guess I'll be down my local air accessories again looking for some suitable connectors to join it all up.

Outlet from pump looks like a compression fitting, something seems off, since would be strange to strangle the compressor with a 1/4 feed into the tank, wonder if there is something like a non return fitting missing, also likely that the supply pipe would have compression fittings on both ends
Ttfn Glenn

Thought I'd mention too, I'm pretty certain the valve block is original as it has exactly the same blue paint on it as all the rest.

I'm assuming the blue paint is original due to the stencils. There also doesn't seem to be any other colour where this blue has flaked.

So this tells me the link pipes on top, if it has them, are something to Do with the air governor. Or, like mine, it can have a pressure switch.

It also suggests only ac35 and ac41 can have unloading valves.

Doesn't mean there can't be one added to the tank connection though I guess


This pic has the valve block. It's a different compressor though.
Shows the connection from pump to valve may well be 1/4. Shows a connection to the pressure switch too and the pipe to the head. This pressure switch has a built in relieve valve by the looks of it, mine doesn't.