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830 injector pump leak question

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fixitforfree

06-11-2005 21:42:49




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Friend has an 830 diesel with around 2500hrs with a leaky injector pump. It leak around a shaft that comes out of the top of the head. The shaft the the throttle linkage is connected to. Is there just o-rings leaking? Is this a major repair? Looks as if I can simply remove the head of the injector pump without removing the pump from the tractor, pop in some new o-rings around this shaft and a new head gasket and put it back together or am I missing something?

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buickanddeere

06-13-2005 06:16:44




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 Re: 830 injector pump leak question in reply to fixitforfree, 06-11-2005 21:42:49  
The Deere web site has the parts manual online. Unless you are a trained injection pump tech with the proper tools? Do you really want to tear into that pump?



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fixitforfree

06-13-2005 06:40:31




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 Re: 830 injector pump leak question in reply to buickanddeere, 06-13-2005 06:16:44  
I"m posting to answer that question. Have you ever torn into one? It looks simple enough to remove the head and replace these o-rings on that "throttle" shaft but I would like to get advice from someone with experience before I do it.



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msb

06-13-2005 09:21:03




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 Re: 830 injector pump leak question in reply to fixitforfree, 06-13-2005 06:40:31  
I was factory trained by Deere on injection pumps and I will tell you Buickand Deere gave you good advice.I rebuilt over a thousand pumps in my day.It takes a special puller to remove the delivery valve where the leak is coming from and then the delivery valve holder and the pump barrel have to be lapped on a lapping plate or they will leak every time.Its a metal to metal seal there which is subject to very high pressures.Then the pump should be run on a test stand and calibrated for best operation.VERY rarely did I have a pump that did not need calibrated after it was torn apart.One reason is its virtually impossible to bolt the pumps exacly back in place where they were.Yes, they do look simple but are not if you don't have the proper equipment.

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fixitforfree

06-13-2005 09:55:29




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 Re: 830 injector pump leak question in reply to msb, 06-13-2005 09:21:03  
So I guess my question is answered. It looked like you could simply take the head off the pump and leave the pump on the engine without ever tearing into the "inside guts" of the pump but I guess that isn't the case. Bottom line is, I only learn by doing. I'm good with a wrench and never say never at anything. I've done lot's of things mechanically I was told couldn't be done but always look for advice before just jumping in. I think my mechanical successes are a direct reflection of me asking questions and investigating the issue before just jumping in cold turkey. Thanks for your advice.

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buickanddeere

06-13-2005 19:10:29




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 Re: 830 injector pump leak question in reply to fixitforfree, 06-13-2005 09:55:29  
Let us know how the rebuild turns out.



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fixitforfree

06-14-2005 05:49:16




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 Re: 830 injector pump leak question in reply to buickanddeere, 06-13-2005 19:10:29  
Oh, I won"t be doing this job based on your advice. I trust you and msb are steering me right. Honestly, if it were my tractor and not a friends, I would jump into and learn even if I ended up having to take the pump to a injector pump specialists with the correct "special tools". But, not having done one before, I would never jeopardize my friends equipment to my experimentation. Thanks for your help.

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