R26638 Fits John Deere Inner Clutch Spring 1020,2020,3010,3020,4000,4010,4020One New Aftermarket Replacement Inner Clutch Spring Fits John Deere Tractors This aftermarket replacement inner clutch spring (R26638) is a compression spring used in the clutch assembly of classic Fits John Deere row crop and utility tractors. It works alongside the outer clutch spring to maintain proper clutch plate pressure and engagement. Multiple springs are required per clutch assembly: 12 springs on 4 cylinder tractors and 15 springs on 6