8TEN Deck Spindle for John Deere X300/X304/X310 X324 - Direct-Fit AM136733 AM143469 AM134292, Grease Fitting

8TEN Deck Spindle for John Deere AM136733 AM143469 AM134292 is a direct-fit replacement spindle assembly designed to restore reliable blade rotation and deck performance on compatible John Deere lawn tractors and zero-turn mowers.

This heavy-duty replacement spindle rebuilds the connection between the deck and cutting blades, helping return a mower’s cutting deck to factory-like performance without the cost of OEM parts. Tested to fit John Deere X300 series and select Z2xx EZtrak models, the 8TEN spindle includes the essential hardware and grease fitting so you can complete installation and maintenance quickly. It omits the pulley, so reuse your original pulley or source a matching one separately.

Will this spindle fit my John Deere model?

Yes — the spindle is engineered for direct compatibility with several John Deere models. It matches the OEM part numbers listed so you can confirm fitment against your machine’s service manual or parts diagram.

• Compatible OEM part numbers: John Deere AM136733, AM143469, AM134292
• Fits John Deere X300, X300R, X304, X310, X324 Select Series
• Also fits John Deere Z225 and Z245 EZtrak zero-turn mowers

What comes in the box and what do I need to install it?

The assembly ships with the core spindle housing and the mounting hardware needed to attach blades and secure the spindle to the deck. A grease fitting is already installed to enable routine lubrication; the pulley is not included, so plan to reuse your original pulley or purchase the correct pulley separately.

• Included: spindle assembly, blade mounting hardware, grease fitting
• Not included: pulley — reuse OEM pulley or order a match
• Installation: basic hand tools, torque wrench recommended, follow deck removal steps in service manual

How does the spindle’s design affect cutting performance?

The spindle centers and secures the blade, so its integrity directly impacts blade runout, vibration, and cut quality. A properly installed, tight spindle reduces wobble and uneven wear, helping maintain a consistent cut line and extending blade life.

• Blade mounting pattern: 7-point star for stable blade attachment
• Height: 6.38 inches for correct deck clearance and geometry
• Grease fitting included to support regular maintenance and longer life

How should I maintain the spindle to prolong service life?

Regular lubrication and periodic inspection for play or bearing noise are the main maintenance tasks. Grease the fitting at recommended intervals, check mounting bolts for tightness, and inspect seals to keep dirt and moisture out of bearings.

• Grease regularly via included fitting to prevent premature bearing failure
• Torque blade and spindle fasteners to spec after installation
• Replace if you detect excessive vibration, noise, or visible damage

Who is this for: The 8TEN deck spindle is aimed at DIY mower owners and small-scale service shops who need an affordable, OEM-compatible replacement for worn or damaged spindles on John Deere X300 Select Series tractors and Z225/Z245 EZtrak mowers. Choose this spindle if you want a straightforward swap that includes blade hardware and a grease fitting, but be prepared to reuse or source a replacement pulley if yours is missing or damaged.