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I have six new vane type pumps that look similar but the bodies are three different lengths. The locating hole on the flat is 12/32 to center from the end on all three. They all have the same cover with casting number 2W-837754 which is the cover for 35, 36. I suspect these are Wohlert's pumps as all the gear drives I have are as well.
Anyone have any ideas on how to pinpoint their application, I would like to sell these and the gear pumps but don't want any disappointments?
Thanks
Dave
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Joined: Jan 2002
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ChatMaster - 25,000
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ChatMaster - 25,000
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Parts book says; 1929 7 5/16" overall length. 1930-1934 except CA, CB, Q, DA.\, DB and Q 7 1/16" 1933-34 except CC,DC 7 7/16" 1935 7 11/16" shaft end flat 1936 7 11/16" shaft end slotted
Last edited by Chev Nut; 05/04/17 08:34 AM.
Gene Schneider
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Joined: Jul 2008
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Wow, thanks. Which parts book is that in and do they show what the measuring points are? Is it with the pumps or in the back somewhere?
Thanks
Dave
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Joined: Jan 2002
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ChatMaster - 25,000
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ChatMaster - 25,000
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This is from the 1953 book MOst post war books will have it. When it says overall length it means from the longest point on each end. No pictures.
Gene Schneider
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ChatMaster - 1,500
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ChatMaster - 1,500
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Thanks again. All my books are prewar, looks like I need to buy another one.
Dave
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
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Just two warnings. If they are not genuine Chevrolet pumps the demensions could be different. The pump came as a change over kit and included the oval screen, screen cover, connecting pipe and pick-up, etc. If these parts are missing the pumps are useless. These were bascially 1937-1939 pumps modified to fit the older models.
Gene Schneider
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ChatMaster - 1,500
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Yes the gear type pumps are the complete kit with screen, pipes, covers and instructions. Those dimensions seem to match. The vane pumps are shorter as 6 7/16, 6 9/16, and 6 7/8. Can I presume the logic on length would be the same on the vanes. As in; 6 7/16 (30-34), 6 9/16 (33-34 master), and 6 7/8 (35 flat)?
Thanks
Dave
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Joined: Aug 2004
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ChatMaster - 3,000
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ChatMaster - 3,000
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If your pumps are Wohlert brand, I hope they are made of iron. I have seen the wohlert pot metal pumps that were unused and had disintegrated in the box. I would be afraid to use one for fear they would fall apart while in use.
Mike
ml.russell1936@gmail.com
Many miles of happy motoring
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Joined: Jul 2008
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ChatMaster - 1,500
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These are iron but still trying to id the vane type.
Thanks
Dave
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Joined: Aug 2004
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ChatMaster - 3,000
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ChatMaster - 3,000
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Dave, I have some vane pumps that are still boxed. Where are you measuring?
Mike
ml.russell1936@gmail.com
Many miles of happy motoring
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Joined: Jul 2008
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ChatMaster - 1,500
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I was using calipers from the top of the pump cover to the end of the housing that mates to the distributor. Gene suggested over all length is what is in the catalog, which I also have. I think the top of the cover to the end is better since you have flat surfaces.
Thanks
Dave
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Joined: Jul 2008
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ChatMaster - 1,500
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ChatMaster - 1,500
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Comparing the gear pumps to the vane pumps I noticed the shaft sizes are different at the machined surfaces. The gear pumps are the same upper and lower machine surface and approx. 1.060. The vane pumps have a lower surface of 1.465, upper 1.060. The illustration in the 29-32 catalog shows a pump (354455)with a larger bottom shaft machine surface. Likewise the 1944 catalog shows straight shaft illustrations of the gear pumps. Is this correct and if so does the gear pump just fit on the upper machine surface?
Thanks
Dave
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