推土铲不提升或提升缓慢的原因及检查（Causes and inspection of slow lifting or lifting of earth shovel）.docVIP

推土铲不提升或提升缓慢的原因及检查（Causes and inspection of slow lifting or lifting of earth shovel） The reason why the earth shovel does not lift or lift slowly and check - print the article Column tree navigation Print this close window Causes and inspection of slow lifting or lifting of earth shovel Author: anonymous source: Internet hits 289 update: 2008-1-17 12:44:08 the input: aory editor: aory 1.1 distributor main control valve wear too much, resulting in hydraulic oil leakage, so that the earth shovel does not lift or upgrade slowly. The clearance between the main control valve and the valve bore is 0.008-0.015mm. When the clearance increases, hydraulic fluid is leaked and repaired. 1.2 distributor safety valve spring insufficient elasticity or spring break, will make the safety valve closed lax, thus causing the earth shovel can not lift or upgrade slowly, should check, adjust or replace the spring. 1.3, cylinder piston wear or piston sealing ring damage, leakage, resulting in soil shovel not lifting or lifting slowly, should be repaired or replaced. 1.4, there is air in the oil circuit and produce emulsification (the foam in the tank), so that the pressure of the hydraulic oil can not be evenly transmitted to the cylinder, resulting in lower working pressure, resulting in the lifting of the earth shovel is not lifting or lifting slowly. When this fault occurs, the joint bolts shall be tightened first, and the handle of the Distributor shall be operated to push the soil shovel up and down several times continuously. The upper and lower chamber high pressure tubing joints of the oil cylinder will be loosened, and the air shall be screwed again after exhausting the air. If still cant exhaust air, should check the oil pump inlet sealing situation and oil pump self tight oil seal wear, and be cleared. 1.5 pump driving device malfunction, the pump can not work, resulting in dozer cannot be improved, the main reason for this failure occurred is the positioning pin engages the lev