case 580c backhoe injector pump

oldcaseguitar · Mar 17, 2011

I need to rebuild the injector pump on my case 580c. Any help or guidance would be appreciated.

Anonymous-0 · Mar 17, 2011

Unless you really know what you're doing, take it a to shop that specializes in them.

oldcaseguitar · Mar 17, 2011

I'm thinkin' I'll take my chances with a $50 rebuild kit. If it doesn't work out for me then I'll let a shop rebuild it. Prices I'm getting are about $800 +-

oldcaseguitar · Mar 17, 2011

No leaks. It just won't throttle up. Starts and idles fine.

Adirondack case guy · Mar 17, 2011

What are you doing, just fixin a leaky throttle shaft?

Anonymous-0 · Mar 17, 2011

are you willing to risk your engine by having a run away? If you have no experience with injector pumps and how they operate hire someone who does.

mite-help · Mar 18, 2011

Is this the standyne/roosa master pump? I have done several with success. look in archives here, info & posts from "j.D." sure helped me. He is boss on these things, but haven't seen him post here in a while--get a special tool to remove cam advance ball stud on bottom of pump- pump shop can order one. I tried to make one, broke the stud-than I had real problems! called a bristol bit I think--available online also. most failures is broken up flex-ring" stopping things up--no rpm-- good luck--paul

oldcaseguitar · Mar 18, 2011

Thanks so much Paul. I will look up your referenced info. It is a stanadyne pump, and I'm pretty sure it's the flex ring that's gone bad. Just an additional note in case you do another one-- I spoke to a supplier today who has a seal rebuild kit that has a steel surrounded rubber ring to replace the plastic flexring. The idea being that the steel surround will contain the rubber should it ever go bad. Thanks again, Rick

Anonymous-0 · Apr 13, 2011

Hello... I've got a 580C as well...I was running it home last winter and suddenly started to lose power... barely made it back like a lame duck...I checked fuel, new filters, return line clear, etc...I couldn't get it to rev up...just idle...anyways, I ended up removing pump which was a bit_h to get back stud nut off... I went to pour fuel out from inside pump shaft and a bunch of small black pieces of hard plastic came out... you mention "flex-ring" and I am thinking that is my problem...plugging up fuel passages...what do u think?...big job to replace? and recommendations?... ie rebuild kit?... thanks for feedback

Jerry

oldcaseguitar · Apr 14, 2011

Jerry, Sounds like your problem is the same as mine. I haven't tore down my pump yet. But I did buy the seal kit on ebay for $29 + shipping. Lots of orings and gaskets in the kit. Plus, I bought the piece which is supposed to replace the original plastic flex ring ($60). Let's stay in touch. Maybe we can help each other through this project. Thanks, Rick

roysbell · Nov 28, 2012

I been looking all over the internet and my Case 580C is doing the same this. Where do you find the steel flex ring? Also I can't seem to find any info on rebuilding the pump. I found the rebuilding kit on ebay but it has the plastic flex ring. What is the flex ring for???
Just don't want to spend the $700 + for a rebuilt one. Any help would be greatly appreciated.

case 580c backhoe injector pump

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