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Transmission pumps

  • JIM.OBRIEN
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03 Dec 2019 21:38 #38974 by JIM.OBRIEN
Replied by JIM.OBRIEN on topic Transmission pumps
Hi Terry, While your open area is equal to the inlet area of the pump you are forgetting the pressure drop across these holes. The oil is 140 wt which is fairly thick. There is nothing "forcing" the oil thru the hole, only the suction of the pump trying to pull the oil thru. Off the top of my head (it's been a few years since I sized an inlet screen) on an application like this I would look at the inlet screen to have at three times the open area of the pump inlet to minimize the pressure drop and not restrict the flow.

Just my 2 cents.
Jim

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  • Terry Cockerell
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04 Dec 2019 04:25 - 04 Dec 2019 04:27 #38976 by Terry Cockerell
Replied by Terry Cockerell on topic Transmission pumps
Jim, you have convinced me to forget about installing the screen. I suppose in hind sight I was very lucky that the gear box had not failed due to the flow reduction introduced by the screen with the smaller holes.
Thanks again for steering me in the right direction. Your comments are worth many "Dollars."

T cockerell
Last edit: 04 Dec 2019 04:27 by Terry Cockerell. Reason: Adding text
The following user(s) said Thank You: Jonathan Richards

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  • JIM.OBRIEN
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04 Dec 2019 18:39 #38979 by JIM.OBRIEN
Replied by JIM.OBRIEN on topic Transmission pumps
Hi Terry, I'm glad to see you are doing your restoration the right way, thinking about what you are doing and asking questions. I'm starting (when I find time) the restoration of my Cord with the same goal as you - I want a great driving Cord when I'm done, one that is as correct as possible. Remember when these cars were new they ran and ran well, people used them as daily drivers and went on very long trips. Not saying they didn't have problems but they were reliable cars.

I want to see photos when you are done!!!
CORDially,
Jim
The following user(s) said Thank You: Jonathan Richards, 1748 S

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