A manual forklift oil leak, what if you can't get up?
The relief valve spring failed Work pressure relief valve is used to adjust system, keep the pressure in a certain range, prevent due to overloading, the hydraulic cylinder piston to the limit position or other reasons caused by the damage of parts of hydraulic system. The relief valve is mainly composed of spring force to press the ball to achieve the purpose of open and close of valve position. When the hydraulic pump output pressure in excess of the prescribed value, high pressure oil pressure overcomes the part of the oil in the high pressure relief valve oil spill tank back. When the oil reaches specified value, the spring under the action of prestressing force in itself, the steel ball pressure on the valve position, the relief valve closed. If the relief valve spring failure, hydraulic oil under pressure from below system regulation would have forced from ball valve position into the oil spill: and cause of leakage, make the system failure. Repairs must be replaced the spring, and then using the adjusting screw to adjust the spring pressure to the provisions of the 14 mpa. The adjustment according to the 600 mm from the center of the load in the demand of load 7.5 t of the goods, when goods in seems up with locking nut locking, the pressure is needed to adjust the pressure.
Oil leakage between body Because working oil, oil spill, oil return tao tao throughout the three monolithic between the valve body, valve body between the sealing requirements are, therefore, between the body and body oil duct installation O ring after bolting the body on the camera, to achieve the purpose of sealing. If the fastening torque of the bolt is different, it may result in the body warping. If the installation as the body damage or o-ring aging or damage, in the role of oil pressure, the valve body between the internal leakage are apt to happen. Repair, if the body damage criterion need to grinding, change the O ring, and screw down the bolt according to the requirements of sequence and torque.
Internal leakage (1) there is too much friction between the stem and the valve body Multiple directional control valve hoisting and tilt on the stem of each have three groove, groove and oil that can be switched on or off oil, change the way to work. Good distributing valve clearance between the valve stem and valve body is small, the spill is few, so the hydraulic cylinder down or tilt volume is small, do not affect work. But when wear clearance is too large, under the pressure of the hydraulic oil pump at work to produce, can cause work in oil or oil spill oil and the oil return tao, automatic back to the tank. The reason is mainly, because of the distributing valve use for a long time or the oil not clean accelerated wear of valve stem and valve body, such as destroy the sealing surface, lead to the oil. Repair if stem wear lighter, when to stem chrome plated finish; If the stem is worn badly, it needs to be replaced.
A lot of it is oil sealed and oil sealed, some oil.I hope my answer will help you.
After the analysis, I found out that the reason for this manual forklift oil leak is probably the most likely: multiplexing to the valve body leakage. The body leakage affects the system operation, allowing forklifts to rise and incline. When the valve stem is aged or damaged in the o-ring between the body, the oil will flow down the stem of the valve, causing the body to leak oil. In case of this failure, simply replace the o-ring seal.
