engine oil pump

Tom Endy

Tom Endy

Well-known member
The oil pump drawing seen in vendor catalogs dawn by the late Howard Barnes show a single hex bolt retaining the oil pump screen cover. I have one that I recently removed from an engine that has two straight slot screwdriver bolts holding the cover in place. I also came across one that does not have any bolts holding it. The method of attachment is the peening over of the metal on the collar it fits down over. I suspect this is an early version and was discontinued because they came loose. I would think it would create strange noises coming from the engine.

Can anyone provide information about the evolution of the Model A oil pump.

Tom Endy
 
The early pumps that I have has the screen cover soldered in place. These pumps mostly have a forged housing rather than cast like the later oil pumps. The early pumps usually have an under cut shaft like the B pump but use different thickness bushings. I always avoid using this type oil pump but many were used well into 1929 .
 
I just tried it . A popup jumped up with an allow or don't allow choice. I made the mistake of clicking on the allow choice. No info about oil pumps showed up. I had to shut down my computor to get off of it. I don't recommend going there.
 
Thanks Mike, still no luck . I get the same pop up , something about an adobe systems agreement . Thanks anyway . I'm fairly familiar with the early oil pumps, just wanted to see what Pluck had to say about them.
 
Purdy, Pluck's file is in the widely used Adobe .pdf format - (portable document format) for sharing files across all computer operating systems. You need a free Adobe PDF Reader file to access these files; it appears that your browser may be trying to install a PDF reader to allow you to read the file.
 
Rich in Tucson said:
Purdy, Pluck's file is in the widely used Adobe .pdf format - (portable document format) for sharing files across all computer operating systems. You need a free Adobe PDF Reader file to access these files; it appears that your browser may be trying to install a PDF reader to allow you to read the file.
Click to expand...

Thanks Rich, I don't know a lot about computors. It kinda scaired me a little when I couldn't get off the pop up. My better half that knows way more than I do told me to just shut er down and it worked to get off of it anyway . I think I'll just stay away from it .
 
Purdy,

What is your email address and I will send you the document by email.

OR you can view it in a 2014 issue of Model A News.

Pluck
 
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thanks pluck for your time and effort on all the research and documentation that you do. the majority here really appreciates it and references it often
 
My thanks to Steve also . I received his dissertation on the many model A oil pumps and changes, some older than the soldered cover pumps that I have in my collection. My thought is that the later pumps with the bolted on cover is the better way to go in any case .
 
My engine number in my 1929 Model A is A2027757 so the engine is July 1929. I wanted to change the oil pump screen so I removed it. My screen cover is peened on as stated earlier but I could still remove the screen. When I look at the parts catalog I see a lower plate gasket which my pump doesn't have, should it have one? When I scrapped the pump housing surface it appears that it had maybe a liquid type sealer and certainly not a Form A Gasket type material between the pump housing and the lower cover plate. I hope the screen can be easily push on once I resolve the gasket question?
Thanks for any reply!
 
I don't use the lower gasket. The lower gasket is only sometimes needed as a shim if repro pump gears rub the lower plate. a lower gasket increases the area inside the pump and decreases oil pressure.
 
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