Re: Diesel Fuel Revisited

Posted by jdemaris on December 11, 2006 at 14:30:55 from (69.67.235.17):

In Reply to: Re: Diesel Fuel Revisited posted by New-Gen on December 11, 2006 at 11:34:14:

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?

Replies:

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]