Vacuum pump refurb

[Greenbeast]

As some would have noticed i've got an old, seized vacuum pump with a bucket milking machine.

Here i've got the shaft and drum out and all 4 graphite vanes removed, unfortunately 2 are broken

Decent old set square and various grades of wet and dry paper

WIth the grinder guard off the wire wheel luckily reached all the way to the other face and covered all surfaces

Shaft and drum reinstalled with the two intact vanes

And it works, in a fashion. It pulls a slight vacuum, i have no gauge at the moment.
I'm having trouble sourcing the right size of vane, not surprising given the likely age of the machine.
I'm wondering if i can buy larger and cut down despite the brittleness, any good ideas?

 

[Netherfield]

I don't suppose you can get anything from Alfa Laval.

 

[Greenbeast]

I don't suppose you can get anything from Alfa Laval.

I've just enquired, seems a long shot though

 

[davieh3350]

What about using some form of plastic instead?

 

[Blue.]

As some would have noticed i've got an old, seized vacuum pump with a bucket milking machine.

Here i've got the shaft and drum out and all 4 graphite vanes removed, unfortunately 2 are broken

Decent old set square and various grades of wet and dry paper

WIth the grinder guard off the wire wheel luckily reached all the way to the other face and covered all surfaces

Shaft and drum reinstalled with the two intact vanes

And it works, in a fashion. It pulls a slight vacuum, i have no gauge at the moment.
I'm having trouble sourcing the right size of vane, not surprising given the likely age of the machine.
I'm wondering if i can buy larger and cut down despite the brittleness, any good ideas?

What thickness are they?

I’ve some worn vanes off the tanker kicking about.

 

[moorender]

Anglo Carbon in Pudsey, West Yorkshire could be worth getting in touch with as I think that they used to do one off's at a reasonable price.

 

[Greenbeast]

What thickness are they?

I’ve some worn vanes off the tanker kicking about.

60x40x5mm, but i'd have a go with anything that's at close to that thickness, i can possibly cut down bigger and i can possibly thin them down with my linisher too

 

[Greenbeast]

What about using some form of plastic instead?

yeah i've wondered that, just had a sheet of 6mm stokboard delivered

 

[Greenbeast]

Brief update, with the 2 intact and 2 broken vanes it pulls enough vacuum to activate the pulsator, just about to clean the bucket and milk lines and give it a go this evening! Will be doing 2 teats at a time until i get new liners for my donated cow cluster

Excited!

 

[Greenbeast]

Didn't work, fails to pull enough vacuum again, maybe i've disturbed something when stripping down for a good clean before use. Will have another tinker tomorrow

 

[onesiedale]

I think I may have some old fullwood vanes that you could cut down.
I'll have a look tomorrow..

 

[Greenbeast]

I think I may have some old fullwood vanes that you could cut down.
I'll have a look tomorrow..

Oh great, thank you

 

[milkloss]

Didn't work, fails to pull enough vacuum again, maybe i've disturbed something when stripping down for a good clean before use. Will have another tinker tomorrow

In that last pic you’ve got the vane in the wrong way round. Not sure if it makes much difference though but it might need to bed in maybe.

Nice clean up job

 

[Greenbeast]

In that last pic you’ve got the vane in the wrong way round. Not sure if it makes much difference though but it might need to bed in maybe.

Nice clean up job

Yes i saw that too, (in the picture), i'll check it tomorrow, although frustrated that i got pulsation in the workshop and then nothing later

 

[Pheasant Surprise]

60x40x5mm, but i'd have a go with anything that's at close to that thickness, i can possibly cut down bigger and i can possibly thin them down with my linisher too

Get your saw out...
https://www.aliexpress.com/item/EK6...ml?spm=2114.10010108.1000023.6.14cc297b7dnRmY

 

[TechWise]

Would some PTFE plastic sheet be an option?
https://www.bearingboys.co.uk/PTFE--2604-c

They also do a nylon sheet impregnated with lubricating oil.

 

[pine_guy]

60mm pumps seem to exist. Try these guys maybe?
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/181286562751

 

[Pheasant Surprise]

60mm pumps seem to exist. Try these guys maybe?
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/181286562751

Think you’d still need to cut those down as they’re 100mm wide. Still a good find though!

 

[pine_guy]

Think you’d still need to cut those down as they’re 100mm wide. Still a good find though!

Oh, I assumed a DTA60 pump would be 60mm long. Anyway, your size is listed in this catalogue, page 201.
https://themicrodairy.com/wp/wp-content/uploads/2019/03/agromilk_CATALOGO-10-18_b-2.pdf

 

[Pheasant Surprise]

Oh, I assumed a DTA60 pump would be 60mm long. Anyway, your size is listed in this catalogue, page 201.
https://themicrodairy.com/wp/wp-content/uploads/2019/03/agromilk_CATALOGO-10-18_b-2.pdf

I guess so long as the price was right it would be a better option than cutting down a larger vane.