Posted by chadd on September 25, 2007 at 14:17:47 from (155.92.33.252):
In Reply to: Tranny oil level plug posted by JohnG(TX) on September 25, 2007 at 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.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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