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Ok. Have ran Gleaners for 30 years plus but had a new one come up this year. Shaker shoe drive arm on right side of machine came off of shaft on front of shoe two different times. Rubber bushing good and still intact. Held shoe rear ward and pushed arm back on and cut ok for 2 days then came off again. What's up?
 

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Your rubber bushing must be worn out or its the wrong one... you should'nt be able to push it on... it takes a special tool and a big hammer to install... or maybe the stub is worn out or loose? I would also check that the drive eccentrics on either end of the driveshaft are in time, a worn key/keyway can put a lot of strain on the shoe and drive components. When installing a new bushing it is important that the shoe be in the neutral position when the clamp is tightened, if it isn't the bushing will rotate on the stub and wear both out as well as giving you a jerky shoe motion.
 
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