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Tool Talk Discussion Forum

Delaval #75 vacuum pump

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B Shugarts

10-19-2005 17:55:24

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Dose anyone have any experience with this pump. how old is it?

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Jimmy King

10-20-2005 01:31:41

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 Re: Delaval #75 vacuum pump in reply to B Shugarts, 10-19-2005 17:55:24  
I bought a new one about 18 years ago, keep them clean and the oiler working and they will last a long time.

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Harold Hubbard

10-19-2005 20:00:30

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 Re: Delaval #75 vacuum pump in reply to B Shugarts, 10-19-2005 17:55:24  
I use one for the vacuum system in my sugarbush. I have no idea how old it is. I got two at a farm aution for $15, one was seized and the other needed bearings, but it ran 16 inches of vacuum 40 hours at a time this spring with no problems. They are pretty simple, not much to go wrong, and usually pretty obvious what's the matter when they do.

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B shugarts

10-20-2005 18:29:09

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 Re: Delaval #75 vacuum pump in reply to Harold Hubbard, 10-19-2005 20:00:30  
Harold how many taps did you have hooked to your vacuum pump and what kind of muffler do you yse also what type of oil. Thanks bruce

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Harold Hubbard

10-21-2005 05:24:26

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 Re: Delaval #75 vacuum pump in reply to B shugarts, 10-20-2005 18:29:09  
About 1200 taps. The pump seemed to have plenty of capacity. I don't use a vacuum regulator, but open a bleed valve until the vacuum drops to the level that I want to run at. That way if something starts leaking I will see a drop in vacuum. If I used a regulator it would just keep opening up until the whole capacity of the pump was being used before anything would show on the guage. I don't think those old pumps should be run at maximum possible vacuum. Mine will pull 21 inches if it is closed right up, but I run it at 16-17 inches.

I used the generic vacuum pump oil that my farm machinery dealer sells from a 55 gallon drum, don't know what brand.

Instead of a muffler I have about 100 feet of unperforated "elephant gut" drain pipe, this keeps the oil vapor away from my sap storage. The drawback to this is a little too much back pressure, I have to keep a weight on the oil fill plug to keep it from blowing out. This spring I bought an oil reclaimer at an auction, and I am going to try to hook that up for next year.

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Jimmy King

10-21-2005 02:59:27

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 Re: Delaval #75 vacuum pump in reply to B shugarts, 10-20-2005 18:29:09  
If I remember right any 10 WT non Det oil.

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10-21-2005 19:44:37

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 Re: Delaval #75 vacuum pump in reply to Jimmy King, 10-21-2005 02:59:27  
We used 20wt on gator pumps . and every week of hard use we would slowly pour a gallon of diesel fuel down intake to clean according to mfgs service manual

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