687-02528 Lawn Mower Blade Adapter with Pulley, Compatible with MTD Gold Pro Yard-Man Troy-Bilt TB230 240 260 TB280ES Tractor, 25mm Drive Pulley Adapter +Bolt +Blade Washer

What It Is

The 687-02528 is a lawn mower blade adapter with an integrated pulley, designed to replace the original part on select MTD-built tractors. It transfers engine power from the drive belt to the blade spindle, and includes a bolt and blade washer for a complete swap.

Fitment & Compatibility

Before buying, verify your mower’s model number (found under the seat or on the frame). This adapter fits MTD Gold Pro, Yard-Man, and Troy-Bilt models including TB230, TB240, TB260, and TB280ES tractors. The pulley has a 25mm (approx. 1 inch) bore—measure your existing pulley’s inner diameter to confirm. Also check that your blade has a matching center hole (typically 25mm). This is an OEM-style replacement, not an aftermarket universal part, so it’s not intended for other brands like John Deere or Craftsman.

Key Things to Know

• Quality: At 4.1 stars from 53 reviews, it’s a reliable OEM-style part, but some users report the bolt can loosen over time—use thread locker during install.
• Installation difficulty: Moderate. You’ll need a socket wrench and possibly a breaker bar to remove the old adapter. Jack up the mower and secure it before starting.
• Common gotchas: The included bolt may be slightly longer than your original—check clearance under the deck. Also, the pulley is not serviceable separately; if the bearing fails, you replace the whole adapter.
• Torque spec: Tighten the center bolt to 35-40 ft-lbs; over-tightening can warp the pulley.

Should You Buy It

If you have a compatible MTD Gold Pro, Yard-Man, or Troy-Bilt tractor and your current blade adapter is worn or the pulley bearing is noisy, this is a direct, cost-effective fix. It’s not for universal use or other brands, but for the listed models, it’s a solid choice that avoids buying a pricier OEM part.