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Home-made fuel pump rebuilding jig
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Harris
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PostPosted: Wed Mar 09, 2011 11:45 am    Post subject: Home Made Tool Reply with quote

Thanks Bart,

David, Try this link

http://www.thesamba.com/vw/forum/viewtopic.php?t=390100&highlight=preload
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6BUG3
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PostPosted: Tue Dec 13, 2011 2:08 pm    Post subject: Reply with quote

quick question.
If the fuel pump is opened, does it need to be preloaded again? i'm assuming so. My dad opened it to see if it was still good Sad
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bill may
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PostPosted: Tue Dec 13, 2011 2:20 pm    Post subject: Reply with quote

6BUG3 wrote:
quick question.
If the fuel pump is opened, does it need to be preloaded again? i'm assuming so. My dad opened it to see if it was still good Sad

Yes.
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6BUG3
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PostPosted: Tue Dec 13, 2011 2:26 pm    Post subject: Reply with quote

that sucks. Sad
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BulliBill
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PostPosted: Tue Apr 17, 2012 8:18 am    Post subject: Reply with quote

Yes! If the fuel pump is ever opened up exposing th diaphram, it needs to be "preloaded" when put back together.

I happen to have both VW factory fuel pump "pre-load" tools (the 25hp /36hp tool, and the 40hp onward tool) somewhere in the basement, and I believe (from memory) that the pre-load distance of the pump rod is 36mm on the 36hp tool, and for the later 40hp onward it is 14mm. Double check that someone...

Great to see the nice homebuilt tools!!!

Bill
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DHMaher
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PostPosted: Tue Apr 17, 2012 11:01 am    Post subject: Reply with quote

Can I "rent" your 40hp one? In between moves and currently don't have resources to build a homemade jig. Will buy or rent someone else's though....
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PostPosted: Thu May 03, 2012 11:09 pm    Post subject: Reply with quote

I was going to post a pic (months ago) of the jig I threw together, but apparently I forgot to! It's nothing special, just a flat piece of 1/2" thick milled aluminum that I drilled and tapped on the drill press. The bolt and jam nut threaded into the plate make the height adjustable, and yes I forgot to dress the end of the bolt before this pic was taken. Anyways, quick and easy.... just like me. Laughing

-Andy

Image may have been reduced in size. Click image to view fullscreen.

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BossGuitars
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PostPosted: Fri Nov 02, 2012 11:29 pm    Post subject: Reply with quote

Here is a diagram / templet my neighbor Andy made up for me when we rebuilt my 36hp pump this last week. Worked great! This could be adjusted from 14mm to 35mm without having to make two different tools.

Image may have been reduced in size. Click image to view fullscreen.
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Window Pain 472
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PostPosted: Wed Apr 30, 2014 10:28 am    Post subject: Rebuild kit for Brosol Fuel Pump Reply with quote

I just started working on my first VW since the 70s.
I would like to know where i can purchase a rebuild kit for my Brosol fuel pump ??( 65 VW type 1 1200)
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PostPosted: Wed Apr 30, 2014 5:42 pm    Post subject: Re: Rebuild kit for Brosol Fuel Pump Reply with quote

Window Pain 472 wrote:
I just started working on my first VW since the 70s.
I would like to know where i can purchase a rebuild kit for my Brosol fuel pump ??( 65 VW type 1 1200)


There are many sources, here is Wolfsburg West:
I believe it is one of these:
http://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=111198553
http://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=111198555
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vdubmyk
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PostPosted: Wed Apr 30, 2014 7:51 pm    Post subject: Reply with quote

I used two of the Brazilian kits that WW sells and both of them put out too much pressure. I even swapped out the original spring and used extra gaskets and couldn't get it right. I bought a NOS kit, preloaded it correctly and all is fine now.
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Volktales
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PostPosted: Wed Apr 30, 2014 10:08 pm    Post subject: Reply with quote

I used one of those Brazilian fuel pump rebuild kits and the pressure was 10 psi. Rechecked what I did and could find no assembly errors. Same thing happened to another guy I knew as well... Was not impressed...
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PostPosted: Wed Apr 30, 2014 11:00 pm    Post subject: Reply with quote

Yes, it's better to use some of the existing parts if possible.

I noticed the pivot piece that the pushrod pushes up and down against sits lower in these kits than an original. This could be the cause of your increased pressure. I have not measured the spring diameter to see if it's different but that is another possibility.

I have an original German pump rebuilt with one of these in my '63 and the pressure was barely too high. I added 2 gaskets and it was fine.

He said he had a Brosol which is Brazilian/Mexican so maybe it will work correctly with that? Always a good idea to check the pressure afterward.
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Window Pain 472
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PostPosted: Thu May 01, 2014 1:44 pm    Post subject: Rebuild kit for Brosol Fuel Pump Reply with quote

Thank you for the info.
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Dr OnHolliday
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PostPosted: Thu May 01, 2014 6:17 pm    Post subject: Reply with quote

Hey, Andy:

Nice drawing!
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Window Pain 472
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PostPosted: Fri May 02, 2014 9:25 am    Post subject: Re: Rebuild kit for Brosol Fuel Pump Reply with quote

EverettB wrote:
Window Pain 472 wrote:
I just started working on my first VW since the 70s.
I would like to know where i can purchase a rebuild kit for my Brosol fuel pump ??( 65 VW type 1 1200)


There are many sources, here is Wolfsburg West:
I believe it is one of these:
http://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=111198553
http://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=111198555


Thanks EverettB
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Window Pain 472
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PostPosted: Fri May 02, 2014 11:24 am    Post subject: 28 pict -1 carb element Reply with quote

Should the choke be completely closed when the engine is cold?? if not closed, do i need a new element or does it need adjustment?
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otis_bartleh
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PostPosted: Fri Jun 13, 2014 2:03 pm    Post subject: Reply with quote

When I got a new fuel pump, a Carter pump, I needed to reset the top the right way, like the cheaper airteks. I didn't think about pre-loading the pump when putting the top back on. My own fault I know for assuming... It was putting out ~3psi iirc.

So, now that I've been running the pump for a few months without having done the pre-load when re-installing the cap, would it be a good idea, or bad idea to pull it back off and set the pre-load properly?
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bug-ugly
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PostPosted: Tue Sep 30, 2014 1:20 pm    Post subject: Reply with quote

BossGuitars wrote:


Image may have been reduced in size. Click image to view fullscreen.


I used that drawing to make a fuel pump jig out of aluminum. It uses three 5/16-24 bolts (not pictured).

Image may have been reduced in size. Click image to view fullscreen.
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frogman_94
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PostPosted: Wed Mar 11, 2015 8:16 am    Post subject: Reply with quote

After reading this thread and making my own jig, I preloaded the diaphragm and tightened up everything. I installed it on the engine and hooked up the fuel line and it leaked like crazy. I took it off and reinstalled the diaphragm without preloading it. Installed on the engine and hooked up the gas line, no leaks.

It looks like when I preload it there is not enough rubber sticking out to make a good seal. Has this happen to anyone else?
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