Need assistance from anyone with an AC fuel pump catalog/interchange book

[DeS-11]

Can anyone who has one of these books determine how an AC 577 compares to a 588? Is the 577 possibly the same, just without the sediment bowl, but otherwise interchangeable?

[desoto1939]

For what car or truck and year and model of car or truck need this info to try to help you.

 

I have an Airtex FP catalog not sure if it will have any info but need the above data points.

 

Rich Hartung

desoto1939@aol.com

[DeS-11]

It would be for a '47 DeSoto; I wanted to have a spare old one to rebuild and keep on hand, given the issues with the lever pin I've read about on the new production ones. I saw a picture of a 577 and noticed that it looked really similar (offset mounting holes, stud for the heat shield, etc.), but it had the bolted-on cast base instead of the sediment bowl. If it would work, I'd actually prefer the one without the bowl as it's one less leak point. Interestingly, the service manual pictures an exploded view of one without the bowl, although it doesn't look like a 577 or 588; my guess is that it's not even an AC, but I wonder what it could have been.

[desoto1939]

Here is a lisiting of fp taken from my Airtex FP catalog.

from 1935-52 all 6 cyl used the 588 pump. Some manufacturers did have them with the glass bowel and others did not. I have the 588 on my 39 desoto with the glass sediment bowel and I do not have any leakage issues with the cork gasket and I have owned my car for 35 years.

 

Rich Hartung

desoto1939@aol.com

 

[DeS-11]

Thanks for posting that; it seems best to just stick with a 588. I found a scanned early '50s AC catalog that someone posted on another site, and it also specified the 588 for this one (the 577 was noted to be "obsolete" in another section, but I didn't see a listing for it as to what it was used in). By the way, what do the other (non-bold type) columns in the chart you show reference?