setting up a used ring and pinion can be and is a ral pain in the drain due to differences in machining of the castings , And getting it dead on only happens about 1 in 10,000 times . You may have a high or low drive and a dead on coast pattern or the other way around . Study the OLD pattern and stop and think of what ya need to do to get the pinion set as close as you can to the org. ware pattern and this will take some playen since you do not have the set up tools that were used to get the pinion depth set to start . And with years of shell we say extencive field testing you have ware on all parts . Then here you come and oh these bearings are getting bad so i will just replace the bearing and i will reset backlash well when you did this you changed everything . and you can NOT go by the book here this is where experience comes into play with setting up a rear end . I(F the book calls for .008-.012 backlash that is for a new gear set on new bearings, so you put new bearings on everything but not a new gear set then you should be happy with .016-.025 back lash . better loose then nice and tight .008-.012 as now you pressed the ring gear deeper into the pinion and the tips will be riding on a new surface and only the tips are making tight contact . Be more concerned with a good drive patter or close then a perfect set on both coast and drive Also just because you have the org. shims this does not guaranty a perfect set due to machining of the housings, that is WHY they make shims..
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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