Main Drive Belt, 491-840, 860

Main Drive Belt – Fits Claas® 840 & 860 (491 Series)

This main drive belt is a critical power-transfer component for Claas® 840 and 860 forage harvesters (491 series). It transmits power from the engine to the core systems of your harvester, including the cutter head, feedrolls, kernel processor, and blower ensuring consistent crop flow and machine performance.

Function

• Drives the primary functions of the forage harvester
• Powers the cutter head, feedrolls, kernel processor, and blower
• Essential for continuous forage processing and productivity

When to Replace

• Replace if the belt shows signs of cracking, frayed edges, or tears
• A glazed surface indicates excessive heat and slippage
• Over time, belts stretch, reducing tension and leading to power loss or slippage

Installation

• Direct replacement for Claas® 491 series machines
• Install to OEM specifications for optimal performance

Compatible Claas® Models

• 840 (491 series)
• 860 (491 series)