Half Sheave Outer Fan Driver Fits JD | Aftermarket AH225971.

Description:
Premium aftermarket half sheave outer fan driver designed to replace OEM AH225971 on John Deere combines. Built from durable cast alloy to drive the cleaning-fan belt with precision and minimal vibration, helping maintain clean air-flow and efficient fan operation during large-scale harvesting.

Type: Half sheave / outer fan driver
Replaces OEM: AH225971 (cross-references AH233507, H227528)
Function: Serves as the outer pulley (sheave) in the fan drive system, guiding the belt that powers the cleaning-fan assembly. Ensures optimal fan speed, stable belt alignment, and longevity of the drive system.
SKU: DCP-AH225971
Dimensions: OEM-equivalent measurements for outer diameter, bore, width and key-way must be confirmed per machine serial.
Weight: Not officially published — list as “weight available on request”.
Value: Factory to Farmer pricing — tough build, honest price
Fits Models: John Deere S-Series S430, S440, S540, S550, S560, S650, S660, S670, S680, S685, S690; John Deere STS 9470 STS, 9570 STS, 9670 STS, 9770 STS, 9870 STS — confirm serial-specific fitment.