AM143390 PTO Clutch for John Deere | Replaced by AM141536

The AM143390 PTO clutch is a John Deere OEM part number commonly listed in parts diagrams for X300 Series, X500 Series, and EZtrak zero-turn mowers. This part number belongs to the same clutch platform as AM141536, with identical specifications, fitment, and performance.

If your mower references AM143390, the correct replacement is the AM141536 PTO clutch, which serves as the current OEM-spec replacement for this platform.

For complete cross-reference coverage and expanded model fitment, see the AM141536 PTO clutch cross reference guide.

Why AM143390 Appears in Parts Diagrams

AM143390 is frequently shown in John Deere parts lookup systems and diagrams, even though it refers to the same clutch platform as AM141536. These variations are the result of catalog updates and internal part number tracking rather than physical design changes.

  • AM143390: Common diagram-listed OEM number
  • AM141536: Current replacement part number
  • Specifications: 5.59-inch pulley, 1-inch bore, CCW rotation, 370°F thermal cutoff
  • Fitment: Fully interchangeable across all compatible models

There are no functional differences between these part numbers.

Replaces OEM Part Numbers

  • Primary: AM143390
  • Superseded by: AM141536
  • Also replaces: AM134397, AM136787, AM137323, AM146088, AUC16267

Compatible John Deere Mower Platforms

This PTO clutch is used across a wide range of John Deere lawn tractors and EZtrak zero-turn mowers.

  • X300 Series: X300, X300R, X304, X310, X320, X324, X340, X360
  • X500 Series: X500, X520, X530, X534, X540, X590
  • EZtrak / ZTrak: Z225, Z235, Z245, Z255, Z335E, Z335M, Z345M, Z345R, Z355E, Z355R, Z375R, Z425, Z445, Z515E, Z525E

Fitment can vary by production year and deck configuration. Always confirm using the OEM part number stamped on your original clutch.

Specifications

  • Pulley Diameter: 5.59"
  • Crankshaft Bore: 1"
  • Rotation: CCW (counter-clockwise)
  • Thermal Protection: 370°F automatic cutoff
  • Operating Speed: up to 3600 RPM

Fitment Note: This clutch uses a 5.59-inch pulley. Always match your original OEM part number to ensure proper fitment and performance.

How to Confirm the Correct Replacement

The most reliable method is to match the OEM part number stamped on your original PTO clutch.

If the number is worn or unreadable, use your mower’s model and serial number to confirm fitment through a John Deere parts diagram.

If your clutch matches AM143390 or any of the cross-reference numbers listed above, the correct replacement is the AM141536 PTO clutch.

FAQ

Why does my parts diagram show AM143390 instead of AM141536?

John Deere parts diagrams may list different OEM numbers depending on production year or catalog updates. AM143390 is a valid OEM reference for this clutch platform and has been superseded by AM141536.

What John Deere models commonly use the AM143390 PTO clutch?

This clutch is commonly used on X300 and X500 Series lawn tractors, along with EZtrak zero-turn models such as Z335E, Z345R, and Z525E. Always confirm using your original part number or model and serial number.

How long does a PTO clutch like AM143390 typically last?

PTO clutch lifespan depends on usage, mowing conditions, and maintenance. Most residential units last several hundred hours, but heat, heavy loads, and frequent engagement cycles can shorten lifespan. Signs of wear include slipping, delayed engagement, or noise during operation.