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11-07-2021, 05:17 PM | #1 |
Member
Join Date: Nov 2012
Posts: 43
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Rebuilding flathead water pump
I’m looking to rebuild some 8rt truck pumps and in the process swap them over to the thinner 3/8 wide pulley. My engines accessories are all thin pulley. Maybe I should swap to the wider? I do have a Mcculloch super charger.
Anyway I made a custom split plate that helps me remove the original pulleys with out damage however when I go to push the shaft and impellor out, the housing cracks. This time the shaft and impeller pushed out about an inch until the end was flush with the bearing. Is there a better way to keep the housing from cracking or is it a crapshoot . Should I make a fixture and drill/ bore the shaft and bearing out I guess I could just buy new pumps and swap the pulleys |
11-07-2021, 08:19 PM | #2 |
Senior Member
Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,529
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Re: Rebuilding flathead water pump
Your taking the pump apart backwards. There's another snap ring in the bottom of the bearing bore its located there so the shaft and pulley assembly is installed at the correct height. This lower snap ring cannot be removed with the pump is assembled.
The correct way to disassemble the pump is to remove the outer snap ring located on the pulley end of the pump housing casting {if there's one there} then you push the bearing and pulley assembly out of the housing from the impeller end. The impeller usually gets damaged as well as the old seal however both of those parts are in the rebuild kit. When the pulley and old bearing shaft assembly are now removed its a simple task to remove the pulley. Ronnieroadster
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
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11-08-2021, 10:12 AM | #3 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,426
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Re: Rebuilding flathead water pump
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