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Case Tractors Discussion Forum
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Re: 830 injection pump

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cshess

05-07-2013 09:04:52
69.88.206.67



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Mel If Case1939 opens bleed on second stage filter if transfer pump is working he will get a lot of fuel also by opening final filter he should get skuirts of fuel.Could it be the old seal around bleed screw is bad an when tractoor calls for lot .of fuel it may be pulling in air. I would put little oring on small screw to be sure no leak at screw. Also make sure no restriction between filter an fuel tank. Also my 830 has a T HANDLE VALVE thatneeds to be opened to bleed filters . That needs to be closed when running. Also if you remove pump line up scribe marks on pump before removing so you dont need to remove hood---an find proper place to reinstall pump

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mEl

05-08-2013 13:00:26
96.249.137.235



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 Re: 830 injection pump in reply to cshess, 05-07-2013 09:04:52  
CS, my 830 is the older model and has the regulator standing up on top of the filter housing. As you stated, any air entrance would be a no no. The way flow is in that systen is, gravity thru the rear canister then through to the transfer pump then return to the filter base to the second stage then to the final stage then to the pump. The second stage and final being seperated by the transfer pump are near impossible to bleed without opening the T valve you noted. Later systems had a pressure regulator in thew valve body behind the 7/8 flat hex plug between the filters on the side.

Those are not complicated systems but a basic understanding is necessary.

The systems are pretty bulletproof but getting to that age!! Rarely does it require a replacement of the transfer pump but if there is full flow to it and the valves are clean maybe so, but I would be surprised, but have been a few times.

mEl

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