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HBT60 concrete pump troubleshooting common troubleshooting
HBT60 concrete pump as a mature technology of concrete construction machinery, has been widely used in construction, construction of bridges. The main mode of work for the "electric control - hydraulic." In order to promptly and accurately determine the reasons for the machine in the process of failure, parts, troubleshooting as soon as possible, now the machine in the course of the phenomenon of common failures and maintenance methods are listed. As follows: 1 motor with load start that is operating the disk "host Kai" switch, the main motor can not start or barely started, it will automatically pump action. First check whether the AC contactor is "burnt to death", if yes, replace the contact of the AC contactor; if not, open the wires of the solenoid valves A and B that control the pumping action and re-operate the "main switch" If the fault persists, check whether the solenoid valve core is "stuck"; if so, replace the solenoid valves A, B; if not, it is the main safety valve leak or spool Stuck, need to be replaced. 2 If the pressure is zero, solenoid valve A will not work, usually the switch, wire or solenoid coil will be damaged. If the pressure is too high (27.4MPa) , Then solenoid valve B is not working or the control line shut-off valve is not open. 3 for the anti-pump switch, not anti-pump check the main gauge pressure, if the pressure showed normal (reversing hydraulic pressure 10.5MPa), the solenoid valve C, D are not working; usually switch, the line is damaged; Large (27.4MPa), then C, D two solenoid valve only one work. Solenoid valve maintenance and the same as the previous example. 4 Conveyor piston stroke is automatically shortened First check the stroke control valve is tightened closed, if not, to be tightened; if yes, open the valve spool, check the seal is damaged, if so, replace the spool seal; if not, replace Check if the unloading pressure of the closed circuit safety valve is lower than 12MPa. If yes, adjust it to be accurate. If not, it is the leakage of the main hydraulic cylinder seal. If the main hydraulic cylinder can not be repaired immediately, the piston can be set aside Valve loosen a little to ensure that each stroke does not shorten and the pressure does not exceed 11MPa prevail, so that leakage compensation, short-term emergency use. 5 Sliding valve malfunction Check whether the slider lubrication is good, if not, clean the slide valve assembly and repair the lubrication pipe and its distribution valve; if it is, check the sequence valve to adjust the pressure is 10.5MPa, if not, adjust to accurate; If so, check whether the accumulator pressure is lower than 5.5MPa, and if so, it must be inflated; if not, it is a serious leakage of spool valve cylinder or wrongly connected tubing. 6 Washing pump heat and high pressure leakage Check whether the water control alignment, if not, adjust the length of the fork to a suitable position; if it is, the direction of the unloading tank on the gear pump cover installed reverse direction, need to change direction. 7 Operate the washing rod, the pump is not drained or the pressure is low First check whether the water absorption filter is clogged, if yes, clean the filter; if not, check if the water cylinder piston seal is damaged, if yes, need to be replaced; if not, check the water pump If it is, adjust the spring or replacement; if not, check whether the unloading pressure of the washing safety valve is lower than 16MPa, if yes, adjust to accurate; if not, check if the washing rod can be pulled to the working position, If not, adjust the length of the fork to a suitable position; if it is, drain the pump cylinder or connect the wrong pipe. 8 oil temperature is too high pump normal use, the oil temperature exceeds 75 ℃ is too high. First check the cooler cooling network is clogged, if it is to be cleaned; if not, check the control circuit shut-off valve is fully open, if not, to be fully loosening; if so, check the throttle valve in the throttle screw whether Off, if so, reassemble tighten; if not, is the main pump leak serious, listen carefully at this time, the main pump has a lot of noise, you need to replace the friction or the main pump replacement. Finally, it should be noted that each time before disassembling the hydraulic components for maintenance, you must shut down and manipulate the manual valve to eliminate residual pressure, to prevent high pressure oil wounding.