Tractor Talk Discussion Board |
Re: ULSD fuel Lubricity
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by jdemaris on March 01, 2007 at 08:39:26 from (66.218.12.178):
In Reply to: ULSD fuel Lubricity posted by dej(JED) on March 01, 2007 at 05:31:40:
In regard to the wear on internal metal parts in injection pumps - especially rotary pumps - it's been known for many years - what they can tolerate, and what they cannot. CAV, Stanadyne, the US Military, et. al. have done a lot or research and published it. Also, wear is not the only issue. When viscosity gets low, pumps can leak internally even when wear has not occured. When we buy fuel - I assume we'll never know, for sure, what the actual specs are - on the fuel going in the tank. That being said, - a viscosity of 1.3 (1.3 square millimeters per second) and above seems to be the "breaking point." Anything thinner than that, leakage, lower lubricosity and early wear occurs. United States #2 diesel fuel is supposed to have a viscosity of 1.9 or above at 40 degrees C. United States #1 diesel - a min. of 1.3. These specs apply equally to low-sulfur fuel and are based on the ASTM specs cited by dej. In Europe, the minimum viscosity and cetane is higher. In regard to "historical" wear in Farmall injection pumps - my ownly experience is with repairing Roosamaster pumps on Farmall/IHs, along with Roosamaster/Stanadyne and CAV rotaries on Deere, AC, and Ford equipment - since the early 1960s. Personally, I've seen very little metal parts wear in those pumps. The many early failures due to shattered plastic parts, shaft umbrella seals, fiber pump vanes, especially governor retainer dampeners has nothing to do with lubrication. I also have seen a lot of corrosion damage - inside head& rotor assemblies and on cam-rings which I assume is from water-in-fuel creating acids. I HAVE seen metal parts wear in newer pumps - especially in Stanadyne rotaries. And, the US military has had extremely high-failure rates with new pumps not lasting 1000 miles - but they are related to thinner fuels than we get at the pump (hopefully). For myself - I just assume I cannot trust, for sure - diesel fuel at the pump - and I use an additive that has been tested and proven to be effective.
Replies:
Home
| Forums
Today's Featured Article -
Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
Copyright © 1997-2024 Yesterday's Tractor Co. All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|