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Should fuel injector rods move????? Case 800B di

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JohnTTT

06-10-2006 18:16:07

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I"m trying to get some information on the four fuel injectors on my 800 Caseomatic.

I"ve pulled the four rods out of the fuel injectors and need to know if the fuel is supposed to go through the rod?

Could the little rod inside be rusted shut? I can"t get any fuel into the combustion chamber.

I can get it to start and run on ether, but I"ve bled everything off and it"s not getting ANY fuel because it wont smoke at all.

What would the next step be? I don"t want to force the rods out of the injectors if they are not supposed to more.

Any help is greatly appreciated.

John

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JohnTTT

06-11-2006 14:13:53

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Re: Should fuel injector rods move????? Case 800 in reply to JohnTTT, 06-10-2006 18:16:07

Thanks for all the ideas.

I think I"m going to break down and take them to a shop as suggested.

I do have fuel all the way up to the injectors - but I can"t tell from there.

I hope I haven"t messed them up by taking them out.

And I hope it"s a workable fix - financially. I"ve heard some horror stories.

I"ll keep you guys posted on what they tell me.

Thanks again for all the help.

John

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Laural

06-11-2006 13:12:18

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Re: Should fuel injector rods move????? Case 800 in reply to JohnTTT, 06-10-2006 18:16:07

I had the very same problem happen to me on my 800. It would run on ether but it just would not start. My problem was the fuel shut-off rod inside the injector pump (American Bosch). Simply remove cover below the injector head on side of injector pump held on by two 7/16th bolts. Remove cover and make sure rod moves freely with throttle linkage. Also, when you try to start it, make sure the rod is not stuck forward (full throttle).

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JohnTTT

06-11-2006 14:34:35

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Re: Should fuel injector rods move????? Case 800 in reply to Laural, 06-11-2006 13:12:18

Thank you, I'm going to try this first.

I'll let you know.

John

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TexasWren

06-11-2006 11:41:23

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Re: Should fuel injector rods move????? Case 800 in reply to JohnTTT, 06-10-2006 18:16:07

And be sure not to put a finger in front of the injectors while testing them. In case they are working, they'll shoot the diesel right under your skin, which has nasty effects

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John Saeli

06-11-2006 10:26:43

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Re: Should fuel injector rods move????? Case 800 in reply to JohnTTT, 06-10-2006 18:16:07

Crank it over while you have the injectors out. My guess is that you won't have fuel. Keep us posted. Good luck.

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PaulD

06-10-2006 18:40:06

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Re: Should fuel injector rods move????? Case 800 in reply to JohnTTT, 06-10-2006 18:16:07

Those rods in the injectors don't have a hole in them. The fuel flows around them. A quick and dirty way to check the injectors without a test stand would be take them out of the heads and turn them around so they face out and crank it over and check the spray pattern or if they spray at all. If they dont spray and there is fuel at the injectors the tips probably are stuck, you can un stick them but you might ding up the tips cuasing it to run funny. New tips are about $40 from case, putting new tips on will require you to take the injectors all they way a part, and to do it right will take a lapping stone and a injector tester to set the pressures proplerly. Reman injectors are $63 with a $30 core charge from AI products. Hope this gives you a little help. PaulD

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Roger (Mi)

06-11-2006 05:14:06

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Re: Fuel injector needles and seats in reply to PaulD, 06-10-2006 18:40:06

Paul is correct. The rod you are describing is the needle. Fuel pressure from the injection pump forces the needle off of the seat and that causes the fuel to be atomized as it then flows through the small holes in the tip. The spring adjustment sets the pop-off pressure. If you've taken them apart, all of the adjustments are now wrong. Unless you have thousands of dollars invested in diesel testing equipment, you're well advised to take the injectors to a diesel injection service.

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