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K181 Vacuum Pump Rebuild


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#1 motobreeder ONLINE  

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Posted July 09, 2013 - 06:14 PM

I'm trying to rebuild my k181 vacuum/pulse fuel pump.  After some some searching, it's appears to be well-known that the rebuild kits have been NLA for quite some time.

 

 

What do I need to get to make a new membrane?  Where would I look for it?  Maybe that will translate to something in Canada.

 

 

Folks at Benson's sold me some rubber gasket material, but when I tried to flex it it tore.  That won't work.  Also, because it's for gas, rubber from an inner tube won't work.

 

 

 

Thanks.

Dwayne.

 



#2 LilysDad ONLINE  

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Posted July 09, 2013 - 07:05 PM

I'm not familiar with that pump. Can you show us a pic? Kit's are availabable  for the usual pumps.



#3 superaben OFFLINE  

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Posted July 09, 2013 - 08:15 PM

Dwayne, if you hurry, post your Kohler model + type and I can check if my Kohler fuel pump kit is right.  It is on Ebay right now for $24, Kohler #236387.

 

For the diaphragm, you will need buna-nitrile rubber.  It is supposed to be the only stuff that will work. 

 

Ben W.


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#4 New.Canadian.DB.Owner OFFLINE  

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Posted July 09, 2013 - 08:36 PM

... For the diaphragm, you will need buna-nitrile rubber. ...

 

As in Nitrile gloves?  The ones that don't dissolve when you play with gas?


Edited by New.Canadian.DB.Owner, July 09, 2013 - 08:36 PM.

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#5 LilysDad ONLINE  

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Posted July 09, 2013 - 08:48 PM

 

 

For the diaphragm, you will need buna-nitrile rubber. 

 

Ben W.

Is that the medical grade ones???


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#6 motobreeder ONLINE  

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Posted July 09, 2013 - 08:56 PM

Dwayne, if you hurry, post your Kohler model + type and I can check if my Kohler fuel pump kit is right.  It is on Ebay right now for $24, Kohler #236387.

 

For the diaphragm, you will need buna-nitrile rubber.  It is supposed to be the only stuff that will work. 

 

Ben W.

 

Thanks Ben, I think I found your ebay listing.  It's for what I've read might be a special or sever duty pump.  Mine has 4 bolts.  Yours has 6.

 

But your answer regarding the material I need is really helpful.  I did some searching in google and it appears to be the same material used to make nitrile "rubber" gloves.

 

Was thinking a piece of nitrile glove may double up the existing gasket for now.  I will have to think about how the pump works and if the two layers will work.  I wouldn't trust the glove material by itself to be strong enough.


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#7 superaben OFFLINE  

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Posted July 09, 2013 - 09:29 PM

I personally wouldn't choose two layers for one diaphragm material, but you can see what you think from what your application requires.

 

I have bought buna-nitrile from McMaster Carr.  They sell it in various thicknesses.  I am working on reproducing Clinton fuel pump diaphragms.  

 

I have this stuff:

 

http://www.mcmaster....-sheets/=njy8cz

 

Is that the medical grade ones???

 

That may be.  Do you want your diaphragm bubble gum flavored?

 

Ben W.


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#8 motobreeder ONLINE  

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Posted July 09, 2013 - 09:34 PM

I found the following - looks like there is a place that has taken on the task of re-making these kits.

http://www.maritimed...ohler_pumps.pdf

 

Depending on the S&H, this looks like a really good value.  I sent an email - waiting for a response.


Edited by motobreeder, July 09, 2013 - 09:35 PM.

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#9 chris m OFFLINE  

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Posted July 09, 2013 - 10:57 PM

That is amazing. I have been searching everywhere with no luck, trying to find a kit for you! And you find a place that reproduces them, and to top it of the place isn't even that far from me lol!

 

I just went to there site and it (Then and now automotive) looks and sounds like a great place. Thanks for finding and sharing this!

 

This will be a HUGE help to everyone that still has any of the Kohler metal (old) fuel pumps!


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#10 superaben OFFLINE  

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Posted July 10, 2013 - 06:06 AM

I think you hit the jack pot!  You need to ask them if you get a free fuel pump kit for referral.  I just sent an email, too.  :thumbs:

 

Ben W.



#11 LilysDad ONLINE  

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Posted July 10, 2013 - 06:56 AM

Yes, you beat me to it. I and others have quoted this site before. That's why I wanted a photo of your pump. I'm thinking of buying one of their kits so I can do a rebuild to post on here. There's no reason to toss your old pumps and buy a cheapo plastic pump.






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