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Weird cover on Walbro fuel pump on Bolens 1253


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#1 SC Farmer OFFLINE  

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Posted November 21, 2016 - 05:52 AM

I've begun my fall refresh work on my Bolens 1253.  I got it running fine using an aftermarket pulse fuel pump, but I'd like to go back with it's OEM fuel pump.  I took it apart and will replace the diaphrams, etc., no problem.  The cover on the pump is obviously home made.  After removing it, I found that the pump is identified as you can see in this second picture.  The rigged cover is on the right in that picture.  Here is my question:  Do I even need the home made cover?  For the life of me, I can't see that it does anything, and since the pump's ID is cast on the next part, does that mean that part is the actual cover?  What do ya'll think?

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#2 EricFromPa ONLINE  

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Posted November 21, 2016 - 06:08 AM

I took a couple off tractors that was physically warped from over-tightening and heat.Maybe the PO ran into the same thing and decided to make a reinforcing plate.That would definitely help to keep it from warping.


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#3 KennyP OFFLINE  

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Posted November 21, 2016 - 06:35 AM

I took a couple off tractors that was physically warped from over-tightening and heat.Maybe the PO ran into the same thing and decided to make a reinforcing plate.That would definitely help to keep it from warping.

That is my though! Check that original cover for flatness.


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#4 EricFromPa ONLINE  

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Posted November 21, 2016 - 06:40 AM

I have a 4 bolt in the shed that has all 3 plates warped.No matter what I tried (short of trying to press it flat again) it would leak even with a fresh rebuild kit.


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#5 tractorgarden OFFLINE  

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Posted November 21, 2016 - 07:28 AM

The homemade cover looks to be made out of a steel city electrical junction box cover,I agree,warped plates,in the cold climates,a tiny drop of water that freezes,can create major havoc to that design.
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#6 tractorgarden OFFLINE  

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Posted November 21, 2016 - 07:31 AM

I highly doubt that's why your south Carolina pump is warped though!
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#7 SC Farmer OFFLINE  

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Posted November 21, 2016 - 02:32 PM

I highly doubt that's why your south Carolina pump is warped though!

Well, I think ya'll might have the answer!  And no, the South Carolina temps were probably not the reason for the rig on this pump (although it was 30 degrees this morning!), but this tractor came from North Carolina, and considering its age (45 years) it may well have been in cold country at some time too.  Good catch on the Steel City plate! Too funny!

 

Well, I may clean up the steel city plate a bit, it's kind of jagged, and give it a rebuild and see If I can't make it work right, although I probably shouldn't mess with the one I have on it now, which works fine.  Pondering it...

 

Thanks again to all for your great comments!

 

Oh another thought - I noticed when I disassembled this pump, that there was, for want of a better description, "blue goo" in between the different metal layers.  Makes sense now.  The "blue goo" was some sort of sealer, like a liquid gasket.  I guess this pump was a leaker for sure!


Edited by SC Farmer, November 21, 2016 - 07:42 PM.

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#8 Alc OFFLINE  

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Posted November 22, 2016 - 06:37 AM

Just a thought  , if these fuel pumps can warp , could it be possible for it to seal internally when cold and when hot move/expand  enough that the pump valves  wouldn't seal and it would act like vapor lock ?


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#9 KennyP OFFLINE  

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Posted November 22, 2016 - 07:28 AM

Just a thought  , if these fuel pumps can warp , could it be possible for it to seal internally when cold and when hot move/expand  enough that the pump valves  wouldn't seal and it would act like vapor lock ?

Good question, Al!






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