New guy with a problem. Doing a rebuild on a 520. Steering is very sensitive and will buck when trying to move in either direction. Linkage had a lot of play as did the foot controls. Rebuilt the foot controls and this works really nice now. Rebuilt some of the steering linkage and now the bucking is worse. I also put on new tires and wonder if this is part of the problem (more traction). It will turn with fewer problems than going in a straight line. It used to be with the bucking I could let go of the control arms and it would stop, Now with linkage tightened up it can keep itself going. Any advice is appreciated.