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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Stanadyne/roosa master inj. pump rebuild

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travis teets

01-08-2006 10:55:00




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Has anyone ever rebuilt a roosa master or stanadyne off of a 770, 1600, 1550, or 1555? or any DB pumps? I have worked on the bosch pumps and feel comfortable with them but I want to attempt a stanadyne and roosa master for 2 different tractors that I have. Are there any warnings I should beware of? Ive been told theyre very simple but as usual they need to be properly assembled or there can be costly damages. I do know that i need to get a factory manual and study but im just looking for some experienced answers. Thanks

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J. Schwiebert

01-08-2006 17:22:52




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 Re: Stanadyne/roosa master inj. pump rebuild in reply to travis teets, 01-08-2006 10:55:00  
First of all both have given you decent advice. Now once you get a pump "rebuilt do you have acess to a good dyno and a good means of measuring fuel flow. Do you have the specs for the 2 pumps you are working on, Are there updates for the pumps/ Just asking. You talk about the Bosch, define what you call rebuilding a Bosch PSB?



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travis teets

01-08-2006 20:57:03




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 Re: Stanadyne/roosa master inj. pump rebuild in reply to J. Schwiebert, 01-08-2006 17:22:52  
ive worked on the bottom end of a bosch but havent rebuilt the hydraulic head



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B-maniac

01-08-2006 16:13:17




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 Re: Stanadyne/roosa master inj. pump rebuild in reply to travis teets, 01-08-2006 10:55:00  
I used to rebuild these for a place called Diesel Injection Service in central Michigan. There is a lot more to rebuilding one of these than just the normal disassembly/clean/replace parts. I guarantee if that's all you do and you put it on the flo dyno it won't even be close on the flow rates at specified rpms,the pressures won't be in specand the load governor wont be set right.If you want it perfect at all rpms or maybe even juice it up a bit,definitly pay the money to have a professional dyno it on one of these state-of-the-art flo machines.It's the only way you willget this pump to meet factory specs.Sometimes you just have to bite the bullet on this stuff.

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e

01-08-2006 19:48:51




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 Re: Stanadyne/roosa master inj. pump rebuild in reply to B-maniac, 01-08-2006 16:13:17  
I have to agre with B-maniac. I've been through DIS in madison and rebuilding a pump is not anything I would try and tackle without a pump stand. After watching the guys who do it all day, I'd just assume leave to them. The amount of frustation that can result from an incorrectly calibrated pump far out weights the savings. Just my $.02 worth.



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Bob

01-08-2006 12:14:46




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 Re: Stanadyne/roosa master inj. pump rebuild in reply to travis teets, 01-08-2006 10:55:00  
There's nothing to it, as long as you are carefull and clean, and have a few basic torque specs. If you can't easily come by an Oliver or Roosa manual, IH Blue Ribbon Service Manuals for Roosa pumps come up on ebay quite often, and are a readily available and reasonable source of OH information.

The one I use is GSS-1346-G 361 and 407 series Diesel Engine and Fuel System Service.



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