This is our pulley brake spring for later number series tractors. Used on 50- 730 tractors. Deere changed the pulley brake assemblies to versions using this spring. Note picture 4 & 5 as to application. We offer this spring separately here or in our kits GP-R20157RKIT or GP-F2362RKIT. Our spring is a stainless steel version for longer service life than original spring steel.