Gantry crane heavy steering failure analysis and processing method

(1) First check  bridge gantry crane  hydraulic pump drive belt is slipping, or other types of conveyor drive damage. If the drive belt and transmission components work well, you should check steering, storage tanks and steering hydraulic pump and hydraulic lines between the joints, oil drain plug for any possible leaks. If there is no leak, oil storage tanks should look flat, and check the hydraulic oil quality.

(2) If the  hoist gantry crane  in the oil bubble, should the air discharge passage. Exhaust air is: Start the engine and keep the engine speed at 1000r/min around, while in the case of the front axle from the top, turn the steering wheel to the left and right limit position (in the limit position for time not too long, otherwise it would be steering pump severe fever, and even mechanical damage), repeatedly turning dozen; during operation, continuing to replenish the oil storage tank until the oil fills the entire hydraulic system when the oil tank is calm no bubbles as well.

(3) If the oil level is normal, you should check the pump and valve work. That connected between the pump and the steering gear box and regulations to adapt the pressure gauge and oil pressure switch, turn on the switch, turn the steering wheel to the extreme position, start the engine at low speed. At this time, if the oil pressure is less than the specified value expression, and in the gradual closure of the switch when the oil can not improve, indicating insufficient flow pump, oil pressure or relief valve is not adjusted. . Can increase or decrease steering pump overflow asked shimming flow, enhance safety valve springs, elevated pressure. After adjustment, if the pressure and flow requirements are not met, indicating severe wear hydraulic pump should be replaced.

(4) If the oil pressure gauge reading  gantry crane  reaches a predetermined value, and turn off the switch when the pressure is gradually increased, indicating good hydraulic pump, the fault in the power cylinder or dispense valve, may be assigned valve spool worn, positioning spring damage , power cylinder seals and poor, should be separately allocated to ask and check the power cylinder, depending on the wear and damage, take appropriate measures repaired.

(5) Following the above check everything is normal, it may be the ball off or lack of lubrication and adjustment of mechanical parts caused by improper.