Excavators work when pressure was significantly higher than 11MPa, should be removed vibration motor, the axial clearance check bearing vibration. Push the shaft axial vibration detection, proper 1 ~ 2mm axial runout; then check the radial vibration bearing clearance radial force applied to the eccentric shaft with a pry bar, if obviously feel runout shall change bearings; last check free movement of shaft vibration condition, the vibration of the shaft to shaft screw mounted a hex head bolt, turn the bolt with a socket wrench 1900C in a clockwise direction, then release wrench. If vibrate when several small excavator swing freely used, feel significant resistance, the incumbent bearings. Excavators vibrating loop start if pressure is low, you should remove the high pressure hose on the pump vibration, sealed with a plug connector tubing used Komatsu little digging machines, the 60MPa pressure gauge connected to the vibration of the pump high-pressure port, engine throttle lever place to put out stop position. Diesel engine with the starter motor rotation, if not up to 10MPa pressure, replace the pump, if the pressure of 10MPa I want to buy second-hand little digging machine, check the starter control valve. Check the start control valve should loosen the wire connector screws. If the vibration switch is turned on, no electrical contact points on the socket, then look for an electrical system failure and battery voltage is sufficient. Remove the seat cover, loosen the nut on the solenoid coil, along with wires and sockets be used to remove small Kobelco excavator, then at 12V DC outlet, use a screwdriver to test the magnetic field is established, the absence of a magnetic field, should be replaced coil; a magnetic field, the change vibration valve. Hitachi used a small excavator, used excavators jinhao price, Anhui used by small excavator Used Construction Machinery Co., Ltd. Shanghai Jin Hao. Used Construction Machinery Co., Ltd. Shanghai Jin Hao (www.jinhaosh.cn) is Shanghai Minhang District, a leader in mining machinery, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Kim Ho Excavators in leadership with the staff warmly welcome all inquiries negotiations to create jinhao Excavators a better future.