SOURCE: I had to get a new mandrel housing which goes
You have to remove the nut on top of the pulley. With the pulley off, the shaft will slide out the bottom with the blade. Don't forget when you put the pulley back on, the washer/spacer goes BETWEEN the pully and housing, NOT on top of the pulley. Dwain
SOURCE: mandrel chews pulley
Are you sure the spindle is not bent and also are you balancing the blades when sharpening. Other then that make sure bolts are tight on the mandrel. With the deck off and standing up spin the blades and watch center of balde to see if something is bent. Also watch pulley on the other side to see if its bent.
SOURCE: MY husqvarna yth2148 left side deck mandrel and
Did it break or overheat? There is a small spacer washer that goes under the pulley between the pulley and bearing, if that washer was missing or got ground up on the first one and you didn't notice it the next pulley would rub hard against the top of the mandrel and fail.
SOURCE: mandrel ruins pulley
there are only a couple of things that could be causing this: either the spacer [looks like a thick washer] is put on above the pulley [it goes UNDER the pulley], or the nut holding the pulley on is not being tightened enough
SOURCE: How can I un-bolt the Mandrel Pulley from the shaft?
If you have the deck removed from under the tractor you can try putting the blade back on tight if you have removed it and then use the blade to keep the mandrel shaft from turning. It takes quite a bit of torque to break the nut loose on the pulley so a socket and ratchet or breaker bar is the best thing to use. Other than that there is no "special" tool required
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