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Milking Machines


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  #1  
Old 03-10-2019, 03:53:03 AM
RustyNumbat RustyNumbat is offline
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Default Milking Machines

Got a couple of my grandads old milking vacuum pumps,
I don't suppose anyone can ID something like these?
I wanted to at least restore them to look nice, and
perhaps even have them working to belt up to my Lister.

https://i.imgur.com/eLDP3eR.jpg
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Old 03-10-2019, 10:55:10 AM
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Default Re: Milking Machines

Also see: https://www.smokstak.com/forum/forumdisplay.php?f=51
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Old 03-10-2019, 05:25:41 PM
Darryl Darryl is offline
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Default Re: Milking Machines

The one on the left is a McDonald and is pretty old and rare, with the reduction pully to drive the pulsators.
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Old 03-10-2019, 10:02:50 PM
RustyNumbat RustyNumbat is offline
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Default Re: Milking Machines

Thanks for that Darryl, got the McDonald open and she looks a right mess. Hopefully I can find some suitably sized bearings to replace, and clean up the insides. I've seen a video of someone restoring a vane similar to this so hopefully it's pretty simple. Since it's a vane pump, then it's not for vacuum but for liquid?



For something sitting idle outside for 50 years or more she had very little water inside, and the bolts and screws all came out like they'd been greased last week!

My old man held the second-hand remembered opinion that these things were as good as gold and would last forever as long as you kept the lubricating oil up to them.

Last edited by RustyNumbat; 03-10-2019 at 10:23:28 PM.
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Old 03-11-2019, 07:08:42 AM
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Default Re: Milking Machines

Numbat, vacuum vane pumps exist. The vacuum pump for brakes on a lot of diesel vehicles use a vane pump and use the engine oil to help seal and lubricate.
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Old 03-11-2019, 07:35:53 AM
RustyNumbat RustyNumbat is offline
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Default Re: Milking Machines

Hmmm maybe if I pull out my finger I can have it done in time for the Warren show this weekend, or failing that the vintage field day in Bridgetown weekend after...
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Old 03-11-2019, 04:24:18 PM
Darryl Darryl is offline
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Default Re: Milking Machines

Always put the vanes back in the same slot but especially facing the same direction . Here's the name plate off a pump i just sold. Maybe a bit older than yours ?
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Old 03-11-2019, 06:36:39 PM
RustyNumbat RustyNumbat is offline
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Default Re: Milking Machines

Should I be giving the internal parts a quick sand blast to remove the rust and such, or is it safer just to lightly wire brush and scotch pad it?
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Old 03-11-2019, 06:38:29 PM
Eric Schulz Eric Schulz is offline
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Default Re: Milking Machines

There may be a bit of misunderstanding here. A dairy vacuum pump is just that, it is not a vane type liquid pump. If, when milking the cows, any liquid coming out of the vacuum pump exhaust would be an indication that something has gone very wrong.

Of course these pumps would pump water. It's just that they wouldn't last very long, as the completely unshielded ball bearings would have their lubrication washed away. The vanes would also be unlubricated.

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Old 03-11-2019, 07:22:19 PM
RustyNumbat RustyNumbat is offline
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Default Re: Milking Machines

Thanks Eric! I'd been told by my aunt they're vacuum pumps, and she'd know given she was around when they were still being used. But seeing they were vane pumps confused me as I didn't know they could be used for vacuum!

Any hints on how the vanes connect in, is there a keyway, do they typically slide in from one side etc?

Last edited by RustyNumbat; 03-12-2019 at 02:59:07 AM.
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