... Samsung,etc Recoil sping track coil spring for excavator and bulldozer Specifications Recoil spring Track coil spring for Komatsu, Caterpillar, ... kinds of precision metal parts as required. Advantages we have:1) Equipment: We own Stamping machines, Hydraulic press machines, Auto ... Hitachi: EX40,EX60,EX150,EX100M,EX100,EX120,EX150, EX200-1-2-3, EX300-1-3- 5, EX400, UH08, UH07Caterpillar: E110B, E200B ...