956-04015A 956-04015 656-0059A 656-04015 656P05011 Variable Speed Pulley Replacement Lawn Mower Pulley - Fit for Ryo-bi, M TD, Yard-Man, Troy-Bilt, Yard-Machine, Cad Machines - Black

What It Is

This is a variable speed pulley replacement for the drive system on select Ryo-bi, M TD, Yard-Man, Troy-Bilt, Yard-Machine, and Cad Machines lawn tractors. It controls belt tension and speed variation, typically used on 42-inch and 46-inch deck models.

Fitment & Compatibility

Before buying, verify your machine’s model number and deck size. This pulley replaces OEM numbers 956-04015A, 956-04015, 656-0059A, 656-04015, and 656P05011. It fits many Troy-Bilt, Yard-Man, and Yard-Machine models from the 2000s–2010s with 42" or 46" decks, but not all—check your owner’s manual or existing pulley part number. Measure the pulley bore diameter (typically 1/2" or 5/8") and overall width to match your machine. This is an aftermarket part, not OEM, so expect slight finish differences but identical function.

Key Things to Know

• Quality: Rated 4.4/6 reviews—generally positive, but a few report premature wear under heavy use. Inspect for burrs or rough edges before install.
• Installation: Moderate difficulty. You’ll need to remove the belt, pulley bolt (often 5/16" or 3/8" hex), and possibly a key or spacer. Takes 15–30 minutes with basic tools.
• Common gotcha: The pulley may come with a different keyway size than your original. Check your existing key and replace if needed. Also, ensure the belt is routed correctly after swap—wrong routing causes slipping or noise.
• Price/value: At $20, it’s a budget fix compared to OEM ($30–50). Worth it for older machines where OEM parts are discontinued.

Should You Buy It

Buy this if you need a quick, affordable fix for a worn variable speed pulley on a compatible tractor and are comfortable with basic mechanical work. Skip it if you need exact OEM fitment for a newer model or if your machine has a different bore/width—measure twice first.