[SPINDLE ASSEMBLY]: AM144608 Spindle Assembly Replaces John Deere AM144608, A-B1JD71 [SPINDLE PULLEY]: UC20697 Pulley Replaces John Deere UC20697, Specification: Height: 0.85 inch, OD: 5 inch, ID: 0.6 inch [HIGH-QUALITY MATERIALS & PRECISE MANUFACTURING]: Our Spindles are Crafted from Premium Aluminum Alloy and Feature Durable Steel Grease Zerks Along with High-Strength, Grade 5 Compliant Screws. We Utilize Precision CNC Machining to Ensure Smooth, Burr-Free Threads, Allowing Bolts and Nuts to Fit Together Perfectly [SOLVE YOUR PROBLEM]: If your Mower Deck Spindle has Experienced Long-Term Use and Shows Signs of Aging or Deformation—Such as Causing Unusual Blade Wear, Difficulty Rotating, or an Uneven Cut—It may be Affecting the Performance of your Cutting Machine. We Recommend Replacing Mower Spindle to Restore the Normal Function of your Spindle Assembly, Improving both Cutting Efficiency and the Durability of the Deck [FITMENT]: Fits for John Deere 48 inch Lawn Tractors: X330, X350, X354, X370, X380, X384, X390, X394, X570, X580, X584, X590, X354, X370, X590, Z330M ZTrak, Z355E ZTrak, Z355R ZTrak, Z365R ZTrak, Z535M ZTrak [FITMENT]: Fits for John Deere 54 inch Lawn Tractors: X584, Z325E ZTrak, Z375R ZTrak, Z515E ZTrak, Z525E ZTrak, Z530M ZTrak, Z540M ZTrak [FITMENT]: Fits for John Deere Lawn Tractors: X380, X384, X390, X394, X570, X580, Z330R ZTrak, X330, X350