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Re: 830 injection pump

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05-05-2013 19:59:58

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On the 500 I have had them shear the pin in the transfer pump and therefore be short on fuel. They will run somewhat if the tank is close to full., but are getting gravity flow only. Transfer gears are under the sort of triangle cover on the pump. fuel gets gummy after sitting a while and shears the pin.

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Andrew from Aust.

05-05-2013 22:53:57

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 Re: 830 injection pump in reply to casecollectorsc, 05-05-2013 19:59:58  
Thankyou! Yes that's kind of what I figured. I've been running on gravity flow. I have filled the tank just about to the top and it runs ok but not great if I load it up too much. I have a dealer service manual but haven't had time to read right through it. Thanks again

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05-06-2013 15:04:12

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 Re: 830 injection pump in reply to Andrew from Aust., 05-05-2013 22:53:57  
Unless the export tractors were equipped differently the 830 should have an inline German Bosch pump, This is not at all similar to the American Bosch used on the 500 tractors which had a rotary head vs the inline configuration of the German Bosch.
There is an oring which seals the transfer pump pushrod which can fail and allow a bad transfer of fuel to the crankcase, had that once on a 2290 with the German Bosch, also known as a Robert Bosch, I believe. I would check for any restrictions to flow clear to the transfer pump, the transfer pump also contains check valves, both inlet and outlet and I have seen them badly plugged although the fuel to the transfer pump should have been through the 1st stage filter. The valves are directional and must be installed properly or fuel cannot flow.

The filter relief should be checked to assure it is closing till the transfer pump builds enough pressure to open it.


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05-06-2013 16:02:35

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 Re: 830 injection pump in reply to mEl, 05-06-2013 15:04:12  
Andrew was asking about a 500 pump. CASE1939 was asking about the 830 pump. I was answering the question about the 500!!!

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05-06-2013 16:31:42

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 Re: 830 injection pump in reply to casecollectorsc, 05-06-2013 16:02:35  
You are quite right, I got the names in the wrong order, My intent was not to denigrate you and your information is factual. We have seen some differences in stuff exported from domestic production and that was the point of my comment. Your info was very valuable pertaining to the pump in question.

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05-07-2013 09:04:52

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 Re: 830 injection pump in reply to mEl, 05-06-2013 16:31:42  
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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05-08-2013 13:00:26

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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.


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