Re: Re: How difficult to rebuild a Rosa Master diesel pump?
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Posted by Milan H. Dilworth on July 31, 1998 at 21:12:56:
In Reply to: Re: How difficult to rebuild a Rosa Master diesel pump? posted by Diesel Dan on July 30, 1998 at 20:25:06:
: The Roosa Master pump is not to difficult to build but very easy to screw up. Tools and manuals are available from any authorized Stanadyne dealer (use to be Roosa Master) I do not reccomend building your own since one wrong move and you can seize the pump as soon as it starts. When the head seizes, it usually breaks the drive shaft in two, so instead of a minor repair it turns out to be a catastrophe. Some heads cost in excess of a thousand dollars with most in the $300 to $500 dollar range. E-mail me for more info.
: Diesel Dan (the pump man) I had the enjoyable experience once of going on a service call to help start a IH 3850 Loader engine, which had been worked over by a guy. I first learned that he'd replaced the head gskt. but didn't think there was a need to adjust valves. I adj. valves and charged batteries. Another one hit the starter while I cracked fuel lines to bleed the air. It was cold and the D-282 engine had a hard time starting, but when it did, something was wrong in the inj. pump and we had a run-away engine. In a second I could feel the hair on my head stand up and I'd bet the engine was turning twice it's high idle speed. I got away, but looked back and saw others standing close-by watching. The noise didn't seem to tell them to get away, so I reached around and pulled the throttle back, with no affect, so I began cracking lines to robb fuel. My other tools were in a dangerous spot, and the 3850 has the engine in tight quarters.
I don't know what had been done to the pump, but if you've ever heard a diesel run-a-way engine, you wouldn't mess with the inj. pump unless you're properly tooled and trained to work on them.
Diesel Dan, What had this guy likely done that caused the engine run-a-way? He'd replaced the pump with an electric shut-off soneloid with one that had the throttle shut-off.
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