How can the hydraulic jack of the dump truck not move?
Check whether the jacks have hydraulic oil leakage, the hydraulic jack inside the hydraulic oil is not enough, or can not reach the standard jack.Check the hydraulic oil before use.
Rust, appear to fall off the hydraulic jack hydraulic cylinder wall. Check the inner wall of the hydraulic cylinder, affecting the degree of sealing.Fifth, there may be an oil pump out of the question, the oil pump leakage, can not produce enough power, but also affect the normal use of jack.
Hydraulic jack tonnage is too large, the force of the oil cavity exceeds the seal load, resulting in leakage of seal.
The hydraulic jack ring is damaged, there has been oil leakage, where the seal should be replaced.Check the sealing ring carefully before use.
In the absence of oil under the premise of finding a professional repair dump truck hydraulic top to the manual hydraulic valve with two or three pads to adjust the oil pressure, the problem can be solved, this method can not be solved, that is the problem of hydraulic oil pump
