PREMIUM REPLACEMENT PARTWe strongly suggest comparing the posted picture to your faulty unit!SPINDLE ASSEMBLYAM128048AM126112SPECS:HEIGHT : 6-1/8″PULLEY OD : 5-1/2″NOTE:MOUNTING HOLES DO NOT HAVE THREAD.POWER TOOL IS NEEDEDTO INSTALL THE BOLTS.IT IS DESIGNED TO WITHSTAND THE VIBRATION.FITS ON JOHN DEERE LT166 Lawn Tractor (With 48-IN Mower Deck) -PC2608 2000 Model M0L166J085001-125000 LT166 Lawn Tractor (With 48-IN Mower Deck) -PC2608 2001 Model M0L166J125001-999999 LT166 Lawn Tractor (With 48-IN Mower Deck) -PC2608 LT180 Lawn Tractor (With 48INCH C Mower Deck) -PC9152 2002 Model M0LT180J010001350000 LT180 Lawn Tractor (With 48INCH C Mower Deck) -PC9152 2003 Model M0LT180J350001500000 LT180 Lawn Tractor (With 48INCH C Mower Deck) -PC9152 2004 Model M0LT180J5000015300