The belt to spin the drum on our Maytag Bravos washer # mvwx700xw1 slides off the pulley (part # W10006356). Is there a way to adjust the tension on the pulley so it will not slide off when turning? The belt slide down and started to cut through the pulley shield and then came off. A second question - should the pulley on the gear case assembly be able to wobble? The pulley can wobble about a 1/4 inch up and down as it spins. Thanks