116-4670 – Toro Flat Idler Pulley (Replaces 136-5404) (Genuine Toro OEM Part) The Toro 116-4670 is a genuine OEM flat idler pulley, designed to maintain correct belt tension and ensure smooth belt routing in Toro lawn and turf equipment. This part replaces Toro part number 136-5404, providing the same factory-approved fit, function, and performance. As a critical component of the belt drive and tensioning system, this flat idler pulley helps reduce vibration, minimize belt wear, and support consistent power transmission during operation. Manufactured to Toro original equipment specifications, the 116-4670 idler pulley is precision-machined from heavy-duty steel and equipped with a high-quality sealed bearing for quiet operation and extended service life. Using a genuine Toro idler pulley ensures correct belt alignment, reliable tension control, and long-term durability. Product Details Manufacturer Part Number: 116-4670 Replaces OEM Part Number: 136-5404 Brand: Toro Part Type: Flat Idler Pulley Category Code: 3BW System: Belt drive / belt tensioning system Function: Guides belt and maintains proper tension Material: Heavy-duty steel pulley with sealed bearing OEM Status: Genuine Toro OEM replacement Function Maintains consistent belt tension Ensures proper belt tracking and alignment Reduces vibration, noise, and premature belt wear Compatible With Toro Equipment The Toro 116-4670 Flat Idler Pulley is used on select Toro lawn and turf equipment, commonly found in: Mower deck belt systems Drive belt and idler assemblies Belt tensioner and routing applications (Exact compatibility depends on the specific Toro model and deck configuration.) How It’s Used This flat idler pulley mounts to a tensioner arm or pulley bracket and contacts the flat side of the belt. As the belt rotates, the pulley spins freely to maintain correct tension and allow smooth belt movement throughout the drive system. Correct installation and alignment are essential to prevent belt slippage and extend belt life. Suggested Maintenance Inspect the idler pulley during routine belt service Check bearing condition for noise or rough rotation Replace the pulley if wobble, vibration, or excessive wear is present Ensure mounting hardware is secure and properly aligned The Toro 116-4670 Flat Idler Pulley, replacing Toro 136-5404, is used in OEM-specified Toro belt drive systems where durability, accurate belt tracking, and reliable tension control are essential.
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