Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Farmall & IHC Tractors Discussion Forum
:

Tranny oil level plug

Welcome Guest, Log in or Register
Author 
JohnG(TX)

09-25-2007 13:44:37




Report to Moderator

The other day as I was reassembling the tranny for my Regular, I was showing it to my wife. I was adding a road box to it, so the oil level sight plug was relocated from the casing to the road box housing. She looked at me funny, and asked why a level plug? Why not just fill it up to the top with oil? After thinking about it, the only reasons I can think of would be cost of extra oil, and the need for some room for the expansion of the oil with temperature. I could imagine filling it to the brim, then getting it hot and have oil spewing out of some small gap somewhere, or blowing out a seal.

So, what determines exactly what the level should be? It seems that the oil level is such that most gears are directly in contact with the oil, or mesh with one that is. Could it be for cooling? A large volume will cool better than a smaller one. Ideas?

[Log in to Reply]   [No Email]
Steven f/AZ

09-25-2007 15:50:32




Report to Moderator
 Re: Tranny oil level plug in reply to JohnG(TX), 09-25-2007 13:44:37  
To go along with what chadd posted...

Most oil seals are not designed to have oil pushing up against them constantly... the higher the oil is above the seal, the more pressure there will be against the seal. Those old leather seals definitaly would not hold the oil in if you filled it to the top!



[Log in to Reply]  [No Email]
chadd

09-25-2007 14:17:47




Report to Moderator
 Re: Tranny oil level plug in reply to JohnG(TX), 09-25-2007 13:44:37  
Part of the consideration is efficiency, part of it is cost. Gear lubrication is for the most part accomplished by the oil climbing up the gears as they rotate. In this manner, the oil gets thrown throughout the housing and into channels to carry it to other bearings, gears, and moving parts. If the transmission is filled to the brim, you have a significant friction loss on every submerged rotating surface, instead of just on the fraction of teeth submerged on the lowest ones. All of the spinning gears, bearings, and shafts churning and circulating the oil would add up to a lot of resistance, thereby greatly reducing the efficiency of the gearbox, especially when you start talking about 90W-140 gear lube. Also, it would be pretty darn expensive to fill the entire rear end case with fluid on one of these tractors, as there is a lot of space in there. Temperature is also a factor, as the fluid will expand.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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 ]

Home  |  Forums


Copyright © 1997-2023 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 Headquarters

Website Accessibility Policy