The tank pictured is what is commonly called a four screw as it has four screws holding the stamped steel lid in place. It has a bell shaped float and is the predominant pump found on 1928 Chevrolets. The other commonly called eight screw was used from mid 20s until '28. It has a die-cast (aka pot metal or white metal) top held on by 8 screws. The general size of both is the same with reinforcing ribs and manufactured by Stewart. There are some straight sided pumps in that era used on other makes and models. I have rebuilt nearly 100 vacuum fuel pumps in the past several years. Sending an 8-screw back to the customer today.

Chip, once again, thanks. Question, does the one I have require the check valve in the manifold?

Chip, drop me an email, if you would, at your leisure. I'd like to discuss getting this thing rebuilt/repaired

Thanks,

Lou

oldbedbug@yahoo

In 2021, I rebuilt the vacuum tank and carb for my '28 Canopy Express. Here is my thread about that adventure: https://vccachat.org/ubbthreads.php/topics/458708/fuel-problems-investigation-and-fixes.html

Hope this helps. Dean

@lou Sent you an email as requested.

@lou I believe I have a check valve. It is the victim of too many pliers being used to remove and install, over the years. I would be glad to send it to you if you would like to have it.

Mike

@35mike 

Mike I appreciate that. I am not sure I need it, it is not clear to me that I do. According to the service manual, the "large" tank, as it is referred to in the manual does not require it. I will keep you in mind. 

Thanks for your consideration

Lou

I think I found a problem

It has two rather large cracks, and four or five more that were probably not leaking, but developing. That, besides five more previous repairs. The last fellow to have it apart made a homemade cardboard gasket for the top and shellacked it in. Making progress

Just a matter of curiosity, the float in this vacuum tank has a number, barely visible, penciled number.33589 I suspect it to be original, assuming the float is original, because the cracks run through the number. 

The Filling Station has replacement floats for the 4 screw vacuum tanks. Far better than soldering the cracks only for them to extend or crack another place.

@chip 

Thanks Chip,

I ordered one awhile back, I was going to replace it even before I got this one out. This one has been repaired at least once, there are five cracks soldered, and several more that are visible, but only two that appear to be breached. Ya, I'm glad I ordered one

Thanks,

Lou