07320800 – Flat Idler Pulley (.377″ × 4.00″ × .96″, Poly) | Gravely / Ariens OEM Part The 07320800 Flat Idler Pulley is a genuine OEM Gravely / Ariens polymer idler pulley designed for use in hydrostatic pump drive and deck belt systems on select commercial zero-turn and ProMaster® models. This flat idler pulley helps maintain proper belt tension, alignment, and smooth power transfer in high-load applications. Its poly (composite) construction reduces noise, resists corrosion, and delivers long service life while minimizing belt wear. Product Details OEM Part Number: 07320800 Description: Flat Idler Pulley (Poly) Bore Size: 0.377″ Outside Diameter: 4.00″ Width: 0.96″ Pulley Type: Flat Material: Heavy-duty polymer (composite) Function: Belt tensioning and guidance Condition: New, genuine OEM replacement Features & Benefits Genuine Gravely / Ariens OEM part for precise fit Lightweight poly construction reduces vibration and noise Corrosion-resistant for long-term durability Maintains proper belt tracking and tension Helps prevent premature belt wear and slippage Ideal for hydrostatic pump and deck belt systems Common Applications This idler pulley is commonly used in: Hydrostatic pump drive systems Deck belt idler assemblies Commercial zero-turn mower belt routing ProMaster® belt and pump drive configurations Fits Gravely & Ariens Equipment (Partial List) Used on select models including: ZT Series (42″ Deck Belt Idler Kit – 515064) ProMaster® MX / HX / H Series PM252MXDZ – 52″ Deck PM260MXDZ / PM260M / PM260H – 60″ Deck PM272H / PM272HXDZ – 72″ Deck Rear Discharge ProMaster® Models PM252H, PM260H, PM272H (selected serial ranges) ⚠️ Model configurations and serial number ranges vary. Always confirm fitment using your machine’s Illustrated Parts Diagram (IPD). Why Choose a Genuine OEM Poly Idler Pulley? Ensures correct pulley diameter and belt geometry Reduces stress on belts and hydrostatic components Delivers quieter operation compared to steel pulleys Maintains factory performance and reliability
