12086 – Rotary Pump Drive Belt, 5/8" x 81-13/32" (Replaces SCAG 483086 / 483166 / 482529) The Rotary 12086 Pump Drive Belt is a heavy-duty aftermarket replacement belt designed for the hydraulic pump drive system on select commercial zero-turn mowers. Measuring 5/8 inch wide by 81-13/32 inches long, this belt delivers reliable power transfer from the engine to the hydraulic pump, ensuring smooth traction and consistent drive performance. Manufactured to meet or exceed OEM specifications, this belt is built for durability and dependable operation in high-load, commercial mowing environments. Product Details Rotary Part Number: 12086 Brand: Rotary Part Type: Pump Drive Belt Application: Hydraulic Pump Drive Product Class: 12 Ordering Multiple: 1 OEM Equivalent: Yes (Aftermarket replacement) Dimensions & Specifications Width: 5/8" Length: 81-13/32" Case Quantity: 25 Pallet Quantity: 16 Replaces SCAG: 483086, 483166, 482529 John Deere: TCU18602 Hustler: 786483 AIProducts: A-TCU18602, A-B1TCU18602 JThomas: JT-9517, DE-951, BT-0035 Function Transfers engine power to the hydraulic pump Maintains smooth and consistent drive operation Reduces belt slippage under heavy load Designed for commercial-duty performance Compatible Equipment (Common Applications) This pump drive belt is used on select SCAG, Hustler, and John Deere commercial zero-turn mowers originally equipped with the listed OEM belt numbers. ⚠️ Fitment is model- and serial-specific. Always confirm compatibility using your mower’s model number, deck configuration, and serial number before ordering. Installation Notes Belt only — pulleys, idlers, and hardware sold separately Proper belt routing and tension are critical Inspect pump pulleys and idlers during belt replacement Replace belt if cracking, glazing, stretching, or fraying is present Suggested Maintenance Inspect pump drive belt during routine hydraulic service Replace at the first sign of wear to prevent drive failure Keep belt and pulleys free of oil, dirt, and debris The Rotary 12086 Pump Drive Belt (5/8" x 81-13/32") is a reliable replacement for multiple OEM applications, delivering consistent hydraulic performance and long service life on commercial mowing equipment.
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