Hydraulic jack system in the basic circuit is composed of a typical liquid as the working medium circuit and to accomplish a specific function hydraulic components. By function can be divided into the direction of the control loop, the pressure control loop speed control loop and the sequence of actions at the circuit. 1. The direction of the control loop is used to control the direction of the control loop circuit hydraulic system for each of the flow of oil passages through, broken and direction. Directional control circuit includes a commutation circuit and locking circuits. Commutation circuit is generally realized by reversing valve to operate. This circuit requires a small valve pressure losses, for the smooth, small leaks. A is the use of three-way manual valve control commutation circuit. When the lever handle left upper, left-bit access systems, hydraulic pump oil through the valve into the left chamber cylinder, pushing the piston to the right, right after the oil chamber B, O back to the tank; when the upper end of the handle When pulled right, the right bit access systems, hydraulic pump fluid through the valve into the right chamber of the hydraulic cylinder pushes the piston to the left, the left chamber oil through the A, O back to the tank; when the pull handle to the middle position, the bit access system, the piston stops moving, so as to change the position of the handle 300 of a hydraulic jack, the piston cylinder can be controlled left and right to change the direction of movement. Electric hydraulic jacks use, pipe joints leak of hydraulic jacks, how to do it? How do we check to exclude it? Here I would electric hydraulic jack fittings leakage fault to you specifically analyzed to help you to troubleshoot tf hydraulic jacks, to avoid this failure: 1: fittings are not tightened; Remedy: Press the general experience Tighten 2: threaded portion thermal expansion; Remedy: hot state retighten 3: vibrating loose fittings; Remedy: Re-tighten, and the use of a pipe with a damper clamp for supporting 4: joint body or nut thread size is too loose; Remedy: Check the size, to replace 5: Metric fine thread pipe fitting screwed into the threaded hole in the cone teeth; Remedy: Replace, you need plastic bags wrapped with Teflon cone teeth when tightening fittings 6: threaded or tapped holes in Before installation can not be worn, soiled or damaged; Remedy: Use wire tapping or pull teeth trimmed back or screw threads, or renewals 7: fittings overtighten the threaded aperture split; Remedy: Replace with new parts 80t hydraulic jacks | Liupanshui hydraulic jacks | hydraulic force provided by the Texas Lu Lu force hydraulic machinery plant. Texas Lu force hydraulic machinery plant (www.luliyeya.com) strong, credible, in Dezhou hydraulic machinery and components industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Lu Hydraulic and you work into the brilliant, for a better future!