Which is good, Shandong used excavators, used excavators jinhao recovery, provided by Shandong Excavators Used Construction Machinery Co., Ltd. Shanghai Jin Hao. Used Construction Machinery Co., Ltd. Shanghai Jin Hao (www.jinhaosh.cn) is specialized in "Komatsu excavator, used Hitachi excavators, Used Caterpillar excavators, used Kobelco mining" of the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr. Chairman. Excavators at the start of work, but suddenly there will be side tracked and can not move the arm fatigue, is the reason? The reason is that most of the hydraulic oil is not clean, tiny dirt clogging the valve piston in the middle of a small orifice . You can remove the safety valve to clean, remove the orifice clogging it. The inspection orifices are not blocked, the pressure relief valve is still why not tune up? This situation is due to the majority of the cone valve seat closed lax, allowing hydraulic C chamber not be established. For machines, especially those of large, expensive machine, even if it is second-hand goods, its quality is still very good. Excavators such a big guy though was included in the ranks of second-hand goods, but its quality is still worthy of trust. Some excavator itself also very good quality, but does not look so bright because of the appearance of being reduced to a second-hand goods in Shandong Excavators, just look again be able to sort out some of the new excavator comparable; there's some hand digging machine just because a part of a problem, it can be corrected only normal use; also some some excavators because some customers eager hands, but also just use it once or twice as a second-hand goods to sell. So the quality of second-hand excavator itself should be very good. You want a used excavators ranging from tens of hundreds of thousands of Shandong used excavators sale, as many millions of Shandong Excavators Which is good, even second-hand, it's asking price is amazing, there is such a value that its value is bound to phase Shandong used excavators for sale, decided to use the value of the key is to match the quality of the product, if the quality is not good, used excavators manufacturers also how to survive it?