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Farmall & IHC Tractors Discussion Board

Gear oil revisted, Bob M others


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Posted by Paul Shuler on August 30, 2007 at 16:02:36 from (170.29.248.3):

There was a discussion a few days ago about gear oil in old Farmalls. It talked about GL-1 through GL-5 90w oil. In my ignorance I didn't even know there was different grades of 90w. This morning I went out to look at the bucket of gear oil I used to top off my H when I changed the pto seal. I Added about two gallons. It said rated GL-5 through GL-3. In the previous discussion it came out that some felt the GL-5 stuff was over kill for old tractors and that it may even be harmful to brass bushings. If this is the case do I need to drain and flush my rearend{on the tractor}. Oil is high now but would be cheaper than a rebuild if it screws something up. Tractor is used 15 to 20 hours a month mowing. All opinions welcomed.
Thanks
Paul


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