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Case Tractors Discussion Forum

Replacing an OEM lift pump

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Author  [Modern View]

08-12-2019 15:02:29

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Hello, When replacing an OEM sediment bowl/lift pump ( the type that had a filter screen in the lift pump ) , on a Case 990. The newer production after market lift pumps do not have the screen filter , or they may not have a sediment bow either. What is the best solution for this situation ? Would putting an " in-line filter " in the fuel line prior to the fuel entering the newer lift pump that has no sediment bowl or filter , be a solution? I would appreciate any serviceable, tried and true , suggestion/ answer. Thanks for any help. Steve

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Oliver 500 Wa

08-13-2019 07:46:06

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 Re: Replacing an OEM lift pump in reply to singletree, 08-12-2019 15:02:29  
My setup is different than yours as the DB850 which my tractor is based on has the bowl mounted to the fuel tank. The screen is just pinched between the housing and a rubber gasket (which I also had to make a new one of) when the glass bowl is tightened up.

I just used the screen that was available to me. I think it was 25 micron IIRC. That's pretty small and I'm sure it will keep out anything that could harm the transfer pump. The final filters then take care of the injector pump.

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08-13-2019 06:25:25

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 Re: Replacing an OEM lift pump in reply to singletree, 08-12-2019 15:02:29  
Sir, Thank you for your reply. I actually considered doing what you suggested but I had no idea how fine or what size ( micron ) screen to order. Also the way the screen is mounted in its own frame , it is crimped in a metal ring - so that it sets down over the fuel exit port, I don't know how I could remove the old tattered screen material and then attach the replacement screen material. If you know of a product that I could use to more or less ( glue the new material to the brass ring or band ) , I would appreciate it. I don't know if soldering would be OK . Thanks, Steve

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Oliver 500 Wa

08-12-2019 17:59:47

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 Re: Replacing an OEM lift pump in reply to singletree, 08-12-2019 15:02:29  
When I was cleaning my sediment bowl years ago, the old bronze screen pretty much fell apart. Place I worked at the time had some fine mesh like this...


So I made a new screen. It has worked great for all the years since.

I'd be sure to find a pump with a bowl or plan on adding a bowl somewhere. Mine is on the bottom of the fuel tank. IMO you need it to collect any water that may be in the fuel or condenses in the tank and gets into the fuel.

I don't think the typical parts store inline filter is going to handle any water without the element getting swollen and blocking the flow.

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