2009 Haas TM 1 milling machine. We have just replaced the spindle drive belt and the motor isolators on the machine. The motor was raised up and all the surfaces were cleaned including the two pulleys, The pulleys do not show much wear, no grooving on the teeth from belt wear. The problem we are having is the belt will not track, it drops to the bottom of the motor pulley until it makes contact with the bottom flange of the pulley. It does this during CW and CCW rotation. The original belt...
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