Fits John Deere Parts ARM FEEDER DRUM AH226296 9870STS,9770STS,9670STS,9570STS,9One New Aftermarket Replacement Feeder House Drum Arm Fits John Deere STS Combines This aftermarket replacement feeder house drum arm Fits John Deere STS series combines and is part of the feeder house assembly. The feeder drum arm supports and positions the feeder drum within the feeder house, helping to maintain consistent crop flow from the header into the combine's threshing system. A worn or damaged drum arm can cause uneven feeding and reduced