Case 580C

Hi: So it looks like I need to rebuild my fuel pump on my 79 Case 580C with 5000 hours. The pump is a Roosa Master A-148069. I have read a bit about it on line. I think it is the flex ring falling apart. I am not a mechanic but have spent a fair bit of time repairing an old Ford 3500 series backhoe. So my question. What do you recommend try to fix it myself (buy the kit and go for it) or spend the $600 and get someone to do a reseal?? If the flex ring fails is it just a matter of cleaning and replacing the flexring and putting it back on the machine? Or do you need to replace a lot of internal components?? She ran like a top until about 5 hours ago. 1 friend suggested taking the fuel lines off the machine another said just take them off the pump and tease the pump out....your thoughts. I was going to open the timing plate on the pump and put a wrench on the front of the motor somewhere and turn it until the lines match up. Am I missing anything? If I just clean out the top of the fuel pump does it harm the machine to keep it running for another 20 hours till the weather is better???? Thanks for all your thoughts. I have owned this machine for 20 hours of use so I don't know it very well at all.

I put a governer ring in the roosa-master on my 5010jd. It is a different model, but i believe they come apart similarly. I bought a rebuild kit off ebay from a place down south that came with a nice instruction booklet and i also got a jd manual reprint on injection pumps from a place in iowa. Its not to hard just have a clean, large bench to lay stuff out while you take it apart.

(quoted from post at 09:56:43 01/29/12) I put a governer ring in the roosa-master on my 5010jd. It is a different model, but i believe they come apart similarly. I bought a rebuild kit off ebay from a place down south that came with a nice instruction booklet and i also got a jd manual reprint on injection pumps from a place in iowa. Its not to hard just have a clean, large bench to lay stuff out while you take it apart.

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Well I took the injector pump apart on the back hoe….. it sort of fell apart when I opened it up…..Freaked me out a little because I wasn’t sure how it came apart. So I put it together as best as I could figure it out. I spent ½ of Saturday and ½ of Sunday trying to get the pump toether and on the machine…it didn't want to go back on. Till finally I took it off and found a piece had slipped just a little and wasn’t allowing the shaft to line up. A friend down the road gave me a hand…one holding the pump and the other fitting a special cup shaped O ring and bingo it slid on. After that I bolted the fuel lines etc together. I took the intake off and had a board ready in case I had a run away engine. Well I gave her some throttle and tried to start…..holly crap it started….the adrenalin was flowing…was it going to be a run away….?????? No it idled back down….ran good and the fuel shut off worked and the engine stopped. I put the muffler (I took the muffler off to do a reair to it while I had the machine apart) and intake back on and it started nicely and ran better. I went for a drive down the block. Tried all gears…yeh seemed to have power. I tried the hydraulics quickly and again appeared to have loads of power. So wow it worked. It cost about $100 in parts versus $700 if I took it somewhere. I just have to put the rest of it together….like hood and odds and ends.

I want to thank people like Derek404t who encouraged and jdemaris who has posted a ton of info that really helped.

I worked on the logic of replacing the flexring and did not take off or adjust anything that I didn't have to. So there was no need to have it tested and reset because I didn't adjust it. I put a few extra new parts in it because I had it apart and why not make it as good as possible. The one part that seemed to be fragile and I would recommend getting if you do it yourself is the "shut off cam". Somewhere in this site is a large pdf file that jdemaris I think put a link to that has very good detailed info for the repair of John Deere injector pumps.... down load it before you start!!!!!! It is well worth your time!!!!! Cheers