UDC Parts 756-04224 Idler Pulley Replacement for MTD Cub Cadet 756-0981A 756-0981 756-0981B 956-0981 GT2150 GT5024 GT5025

What It Is

This is a replacement idler pulley for the spindle drive belt on select MTD and Cub Cadet lawn tractors. It maintains belt tension so the blades engage properly, making it essential for consistent cutting performance.

Fitment & Compatibility

Before buying, confirm your mower deck width (42", 46", or 50") and check your model number against the list: GT2150, GT5024, GT5025, and any unit using OEM pulleys 756-0981A, 756-0981, 756-0981B, or 956-0981. Measure your existing pulley: this replacement has a 3.5" outer diameter, a 1/2" bore, and a 3/8" belt groove width. It’s a direct aftermarket swap for the OEM parts—no modification needed.

Key Things to Know

• Quality: Made of steel with a sealed ball bearing; rated for residential use and holds up well under normal mowing conditions. Not heavy-duty for commercial/rough terrain.
• Installation: Easy—remove the old pulley’s retaining bolt, swap pulleys, and retighten. Use thread locker if the bolt is loose. Takes under 15 minutes.
• Gotchas: The bearing is sealed and non-serviceable—if it seizes or gets noisy, replace it immediately to avoid belt damage. Check the belt for wear at the same time.
• Price vs. OEM: At $13.49 it’s about half the cost of the Cub Cadet branded part, with nearly identical performance for most homeowners.

Should You Buy It

If you have an MTD or Cub Cadet tractor with a 42"–50" deck and need a reliable, affordable idler pulley for residential mowing, this is the right choice. It’s a proven replacement for common OEM numbers, easy to install, and backed by strong reviews. Skip it if you run a commercial zero-turn or need a heavy-duty bearing.