138-7597 – Pulley-Idler, Flat (3BW) – Genuine Toro OEM Part The Toro 138-7597 Flat Idler Pulley (3BW) is a genuine Toro OEM belt drive component designed to maintain proper belt tension and alignment within mower deck and drive systems. This flat idler pulley ensures smooth belt tracking, reduces vibration, and helps extend belt and component service life during operation. Manufactured to Toro original equipment specifications, the 138-7597 pulley is precision-machined for accurate fit and built to withstand high rotational speeds, continuous load, and demanding outdoor mowing conditions. Product Details Manufacturer Part Number: 138-7597 Brand: Toro Part Name: Pulley – Idler, Flat Series / Code: 3BW Part Type: Flat idler pulley OEM Status: Genuine Toro OEM Condition: New Key Features Flat pulley design for smooth belt contact Maintains correct belt tension and tracking Reduces belt wear and vibration Durable construction for long service life Direct-fit OEM replacement with no modification required Compatibility The Toro 138-7597 Flat Idler Pulley is used on select Toro mower deck and belt drive assemblies, commonly found on zero-turn and riding mowers utilizing 3BW-series components. Typical applications include: Toro mower deck belt tension systems Idler arm and pulley assemblies Lawn and turf equipment requiring OEM flat idler pulleys
