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Analysis of Sliding and Shovel Lifting Failure of Laser Grader
1, scraper shovel does not lift. First check whether the receiver can detect the laser signal. Since the receiver can only detect the laser signal within 5cm of the reference elevation, it is necessary to adjust the position of the laser transmitter and receiver first, determine the elevation of the laser transmitter, and adjust Good laser transmitter and receiver, so that the receiver can receive the laser signal normally. Second, check whether the controller is turned on. When it is determined that the receiver is in normal working condition and the scraper is not working, check whether the controller fixed in the cab is powered on. That is, the control handle is placed in the “ON†position and the red light is on ( The controller is normal. If the red light is not on, check whether the controller and battery are energized. The third check is whether the pressure valve in the hydraulic control system is damaged. When the pressure valve is bad, the hydraulic oil line is in a normally open state, and the scraper shovel cannot lift. The fourth check is whether the solenoid valve is damaged. When the solenoid valve is damaged, the hydraulic oil circuit is in a closed state, and the scraper shovel cannot work normally. 2. Scraper lifting is not working. First check the hydraulic oil pipe for oil leakage. If there is oil leakage in the hydraulic oil pipe, the pressure in the hydraulic oil line is not enough, and the scraper shovel will not work properly. If the hydraulic oil leakage hole is small, it can be sealed with sealant. If the oil leakage hole is large, only the hydraulic oil pipe can be replaced. Secondly, check the pressure valve. If there is no oil leakage in the hydraulic oil pipe, it may be that the pressure of the pressure valve is not enough. The valve of the pressure valve may be adjusted to increase the pressure of the pressure valve. The third inspection solenoid valve, such as hydraulic oil pipe does not leak, the pressure valve pressure is high enough, there may be a coil in the solenoid valve is burned, you can re-wrap the coil or replace the solenoid valve. The fourth inspection of the hydraulic oil pump, if the above parts are normal, it may be that the hydraulic pump is not closed tightly, the oil in and out of the oil port appears immersed oil phenomenon, the gear wear amount is large or the oil inlet and outlet are reversed. 3. The manual controller cannot control the blade lift. Check if the controller is energized, if the hydraulic tubing leaks or if the solenoid valve is damaged. 4. Scraper lifting is contrary to practice. Check whether the manual detector circuit and solenoid valve are reversed.