A couple of years ago I rebuilt a 1950's Continental Belton post hole digger. The previous owners had run it without oil and galled the gears and smoked the bearings. Since the gearbox on that old gal ran pretty slow and intermittently I figured that if I touched up the gears with a fine flap disk on the right angle grinder and replaced the bad bearings it would run right for my purposes. Sure enough with new bearings shimmed to the right clearance it runs well. I did have to make a new lower bronze bushing because it was a dealer item and no longer available anywhere. My take on the gears is if the new bearings will hold tolerance and you can clean the galling on the gears with a fine disk then why not give her a go? Another thing I've discovered is that the less horsepower you try to force through a gearbox the longer it lasts. Another thing I've discovered is that you can install grease fittings on old gearboxes and keep the bearings well lubricated and they will hold up much better than the original design. John
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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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