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Farmall & IHC Tractors Discussion Forum
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1256 roosamaster fuel pump trouble

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Butch WI

04-09-2004 18:14:31




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The farm I am employed at just purchased a 1256 turbo (nice condition w/6500 hrs.) It was purchased from an estate. It sat for two years without running. After draining the fuel tank, changing the fuel filters, oil & filters, it was time to use it. We hauled two loads of manure a mile away and it ran great! Next task was to grind a load of shelled corn, 2/3 of the way into the load it began to loose power drastically. I was able to stop the grinder before plugging it and before snuffing out the tractor, but then it would barely idle and had just enough power to move itself to the shed. 1/2 hour later it started right up, slowly increased rpms to 3/4 throttle and again it seemed to be starved for fuel. I consulted a friend (worked at a diesel injection shop for 8 years) he said it sounded like there was a return line problem or a check ball in the return line was stuck. I took all lines apart at the tee in the top of the pump. I blew them out with no blockages or dirt, etc. Before I put them back together I ran it. It ran great! After two days of moderate work this afternoon it was starved again. I took the lines apart again but it would still only barely idle after just 20-30 seconds. Then I took out the check ball between the pump and the tee. It looked fine and the glass ball moved freely. before putting it back toegther, It ran great. I put it back together and again it ran poorly. This time I removed the check ball and put the tee directly into the pump. It ran great again for my last load of the day. My question is: can I run this without the check ball? For a short period of time or a long time? My friend is gone for the weekend and I still have work that I would like to do with it. I read this board a lot and I know there is a lot of experience between everyone on here. Soon I hope to put pictures of it here. Thanks In Advance!!!!

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Brian

04-10-2004 16:29:44




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 Re: 1256 roosamaster fuel pump trouble in reply to Butch WI, 04-09-2004 18:14:31  
Your "mouse turds" are pieces from the flex ring on the governor weight carrier. When it gets bad enough it will no longer idle smoothly could cause alot of wear inside the pump and if let go long enough seize up the pump.



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Hagan

04-09-2004 18:38:21




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 Re: 1256 roosamaster fuel pump trouble in reply to Butch WI, 04-09-2004 18:14:31  
I had the same problem with my 560 with a roosa-master pump a few years back. I loosend the return line (I beleive it was) and it ran fine. It turned out to be the rubber seal inside the pump. Probably the same one JMS/MN mentioned. My pump repair shop said the pump had to be rebuilt though so it cost me nearly $500. But it ran good afterwards



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JMS/MN

04-09-2004 18:29:50




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 Re: 1256 roosamaster fuel pump trouble in reply to Butch WI, 04-09-2004 18:14:31  
Sounds similar to what I had with a 3020 some years ago. Did you find small bits of rubber in the fittings or by the check ball? Look like mouse turds. I dealt with Mike at Diesel Specialties in Albert Lea, Mn. 1-800-966-2198. His phone diagnosis matched what I found, I sent him the pump, and he replaced only what he told me he would. Works fine ever since.



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Butch WI

04-09-2004 18:36:00




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 Re: Re: 1256 roosamaster fuel pump trouble in reply to JMS/MN, 04-09-2004 18:29:50  
I didn't notice any (I watched closely because I was told about the "mouse turds" too.) I will probably take the pump off and send it to DIS in Sun Prairie, WI next week.



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