Idler spring Track spring for Komatsu, Caterpillar, Hitachi, Kato, Dawoo, Hyundai, Sumitomo, Samsung,etc Recoil sping track coil spring for excavator and bulldozer Specifications Recoil spring Track ... capability on product design Compatible types: Komatsu: PC40,PC60-5-6-7, PC100,PC120, PC130,PC240, PC200-1-3-5-6, PC220 ...