Husqvarna 532138687 Lawn Tractor Primary Idler Arm Spring Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; 917250560,917251650,917276030,PPRGT20H50A,917255981,917275972,917255980,917275971,917275970,917250550,PRGT22H50D,917250551,917251370,917255970,917259010,PRGT22H50B,917259011,PRGT22H50C,PRGT22H50A,917251550,917258901,917258902,917273064,917258903,917273061,917251551,917258904,917273062,917276052,917273060,917276051,917276050,917258900,AYP8228A79,AYP8209A79,917251660,917273052,917273050,917273051,917276041,917276040,917273322,917273323,917273320 This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including; 138687,138687 Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Craftsman,Poulan,Western Auto,Frigidaire This primary idler arm spring (part number 532138687) is for lawn tractors Wear work gloves to protect your hands when installing this part