PTO Clutch Assembly AM126100 Fits for John Deere GT225 GT245 GX255 LT190 LX255 LX266 LX277 LX279 LX280 LX288 LX289 SST15 SST16 SST18, 5219-221

What It Is

The PTO Clutch Assembly AM126100 engages and disengages the mower deck blades on select John Deere lawn tractors. It replaces the factory electric clutch when worn out or seized, restoring blade operation.

Fitment & Compatibility

Before buying, verify your mower model matches this exact list: GT225, GT245, GX255, LT190, LX255, LX266, LX277, LX279, LX280, LX288, LX289, SST15, SST16, SST18. Also cross-reference your OEM part number: AM126100 (this is the aftermarket equivalent of John Deere’s original). Measure the clutch’s bolt pattern (typically 3-bolt, 2.5-inch center hole) and shaft diameter (usually 1-inch) to confirm physical fit. Deck size does not affect compatibility—only the tractor model and PTO design. If your mower has a different OEM number (e.g., GY20585), this clutch may not fit.

Key Things to Know

• Quality: Aftermarket unit, not OEM. 4.7 stars from 14 reviews suggests solid performance, but expect slight differences in finish or noise vs. factory.
• Installation: Moderate difficulty—requires removing the deck, disconnecting wiring, and pulling the old clutch. You’ll need basic tools (socket set, puller) and about 1–2 hours. No special calibration needed.
• Common gotchas: Check the air gap (0.010–0.015 inch) after installation; if too tight, the clutch may drag or fail. Also inspect the pulley and wiring harness for damage before swapping.
• Wiring: The clutch uses a 2-pin connector. If your tractor’s harness is corroded, you may need to splice or replace the connector.

Should You Buy It

If your John Deere GT/LX/SST-series mower’s blades won’t engage or the clutch is noisy/seized, this is a cost-effective fix. It’s not OEM, but the price is reasonable for a direct replacement with good reviews. Best for DIYers comfortable with basic mechanical work. Skip if you want a guaranteed factory part or have a model not listed.