Be sure you are wearing a tight fitting hat, so you don't tear your hair out. Need a few details here. You say 38", so I'm assuming 3 blades. Is there 1 belt driving 1 spindle & another belt from there to drive the other spindle(s)? While others may have different methods, this is the way I would proceed. Remove the blades & start it up. Running smooth- suspect bad blades. Still vibrate- suspect spindle or belt. If bad blade suspected- install 1 blade & try it again. If okay, remove it & try another blade. If bad- move blade to a different spindle & try again. If still bad with blades off, remove secondary belt & try with main belt spinning only 1 spindle. This is where your stethoscope or a short piece of water hose for listening comes into use. Just have to eliminate 1 component at a time, then go forward to next component or backtrack, depending on results. O.T.- learned this method of isolating trouble in military, shooting trouble on buried phone cable, can find trouble in a 10 mile run by only digging about 15 small test holes to drop in listening device, good-go forward, bad-backtrack. Get within inches before actually having to open it up. But I ramble. Willie
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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