jdemaris
12-11-2006 14:30:55
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Re: Diesel Fuel Revisited in reply to New-Gen, 12-11-2006 11:34:14
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I sense a note of sarcasm - but it's kind of hard to tell, for sure, from here. Let me get this straight. You opened this thread with an implication that using low-sulfur pump diesel is going to cause problems in our rotary injection pumps - am I correct so far? You also said that after suffering such a problem, you later corrected it with a fuel additive. I don't see where anyone even hinted at you suffering from an "inferior level of intelligence" as you put it. You are the only person that mentioned it. I will induct from your comments that you really believe you know something that some of us don't, and we are too pig-headed to acquiesce and listen. Going by what you've stated - Stanadyne DB or JDB pumps will not run properly with low-sulfur diesel fuel. That is incorrect. If that were true, Stanadyne would be in quite a mess since the same basic pump you have on your 4020 is also used on Chevy and Ford pickup trucks. Also on Deere, Allis Chalmers, Ford, IH, Oliver, Cletrac, et.al. A 4020 uses the following pumps: CBC633-1AL, CBC633-18AL, CBC633-24AL, CBC633-28AL, DBGVC633-1AJ, DBGVC633-3AJ, DBGVC633-5AJ, JDB633AL2402, JDB633AL2404, JDB633AL2719, and JDB633AL2721. Of those pumps, the little round pumps are the CBC models. All the others i.e. DB and JDB - like you have - originally had a plastic weight retainer ring. It has ALWAYS had a high failure rate - with any fuel - in tractors and cars and pickup trucks. It sounds like your 4020 had the CBC pump originally. Parts were discontinued for it early 80s and Deere sold change-over kits to install a JDB pump. The plastic ring that often fails was originally plastic, then changed to what Stanadyne called "Elasticast", then changed again to "Pellathane", and finally - late 1985 - it was eliminated and a new style "elastomer insert drive" was used instead (EID). Most pump shops routinely update the older pumps to the EID assembly - but some cut corners and do not. It adds $30 to the job and maybe makes the pump last too long. Again - it has always been a problem with any fuel. And, once broken, you don't correct it by adding a fuel additive. I don't doubt you've had pump and/or engine problems. And I don't rule out the possibility that you had a problem with a newly rebuilt pump - and an additive made it run better. But - if that is the case - the additive is serving as a "Band-aid" to a problem. If that JDB pump was repaired corrrectly, it would run fine on pump fuel - or heating oil. Why do you suppose there are thousands of those pumps out there, running every day on low-sulfur fuel and not self-destructing?
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