The original installation import components may use in god steel - 6 -6E the proportion solenoid valves and high-pressured sensor this components the proportion solenoid valve are in nearby the hydraulic pump for vulnerable after the excavator the long-term high temperature high frequency vibration as well as very easy to contaminate greasy dirt damage are not easy to repair the damage the excavator to be unable the normal work, and extremely easy to create components and so on other components like hydraulic pump pump controller damages, if components and so on hydraulic pump pump controller will damage the damage which created after the excavator cannot be repaired to cut components expense huge light and so on worse hydraulic pump pump controller several thousand frequently over ten thousand, therefore used this coupling replaced may the effective protection hydraulic pump pump controller and so on important components this coupling all components be the overseas import qualityThe first-class quality has the guarantee customer to be possible to feel relieved that the amount of use purchases in advance quickly greatly liberal