2 Pack 132-9420 Flat Idler Pulley Replaces Toro 106-2175 Flat Idler Pulley for Toro 4200 4220 4225 5000 MX5000 MX5050 MX5060 SS4225 SS4235 SS5000 SS5060 sw5000 Z420 Z4200 Z5000 Z5035 Tractors

What It Is

This is a 2-pack of flat idler pulleys designed to guide and tension the mower deck belt on Toro zero-turn and lawn tractors. It replaces OEM part 132-9420 and Toro 106-2175, keeping the belt properly aligned during operation.

Fitment & Compatibility

Before buying, confirm your mower model from the list: Toro 4200, 4220, 4225, 5000, MX5000, MX5050, MX5060, SS4225, SS4235, SS5000, SS5060, SW5000, Z420, Z4200, Z5000, Z5035. This pulley fits 42", 48", 50", 54", and 60" deck sizes on those models. Measure the pulley diameter (typically 4.0") and check the bearing bore size (usually 3/4" or 5/8"). Verify your deck’s idler arm spacing matches. If your original pulley has a different part number, cross-reference with 132-9420 or 106-2175.

Key Things to Know

• Quality: Aftermarket parts may have slightly shorter bearing life than OEM. Check reviews for durability on heavy-use machines.
• Installation: Moderate difficulty—requires removing the deck belt and idler arm bolts. A wrench and socket set will do; no special tools.
• Common gotcha: The pulley may have a different groove width than OEM. Measure your belt width (typically 1/2" or 5/8") and compare to the pulley’s groove.
• Pack of two: Useful if you have two idlers on your deck or want a spare. Not all models use both.

Should You Buy It

Buy this 2-pack if you need a budget-friendly replacement for a worn or noisy idler pulley on a compatible Toro tractor and you’re comfortable with basic deck maintenance. It’s a solid value for light-to-medium use, but if you mow commercially or demand OEM fitment, stick with genuine Toro parts.