It sounds to me line the machine is being run with dull knives. Knives must be removed an sharpened when dull otherwise the chipper will vibrate itself apart. Also the flip down trays on the bandits or any chipper are week at best. You can expect them to break welds on them. With the hydrolic lines, there should be a warning label that states it is the owners responsibility to make sure hydrolics and bolts are tight. My guess is change the knives more often or stop sending rakings through.