36 coupe said: (quoted from post at 05:40:07 05/09/13) There is an .040 hole at the inlet of the filter can.Oil pressure would be low without it.But it seems the oil flow at 40lb pressure could be calculated and the answer found.No mention of full flow filters leaking down and no oil to the bearings until the can is full.The poor quality of some filters comes to mind.
A few months ago I did a little spreadsheet calculation on oil flow inside the flathead so I just happen to have some numbers already on hand for you to chew on. I'll be happy to provide you with a copy of the spreadsheet if you would like to verify the algorithm or play with the clearance numbers to see what happens in a worn engine:
The cross sectional area of the .040 orifice in the filter housing is .0013 square inches.
Assuming "like new" journal oil clearances of .001 the sum total cross sectional area of the oil clearances in all of the journal bearings is .129 square inchs. That is just the flow area around the camshaft, main and rod journals and does not include oil squirt holes, wrist pins, etc.
Based on those basic numbers care to hazard a guess on what percentage of the oil pumped out of the sump goes through the filter? The oil filtering system on the N-series flathead is a joke.
TOH
This post was edited by TheOldHokie at 05:22:56 05/09/13.
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 ]
Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
... [Read Article]
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.
