... Kato, Dawoo, Hyundai, Sumitomo, Samsung,etc Recoil sping track coil spring for excavator and bulldozer Specifications Recoil spring Track ... coil spring for Komatsu, Caterpillar, Hitachi, Kato, Dawoo, Hyundai, ... 2) Material: iron, carbon steel, stainless steel, brass, copper, alloy steel, aluminum, cold rolled steel with various plating; 3 ...