Key points of daily maintenance of hydraulic system of electric forklift

The hydraulic system of an electric forklift truck is a key component that undertakes core functions such as cargo lifting and steering. Its operating state directly affects operation efficiency and operation safety. Doing a good job in daily maintenance is the core measure to reduce the failure rate and prolong the service life of the equipment.

The basic investigation before daily operation is the first checkpoint for hydraulic system maintenance.

Before the operation, the hydraulic oil level inspection should be completed first. The forklift should be parked on a flat ground, and the liquid level gauge should be checked after lowering the fork. The liquid level should be in the highest and lowest scale range. If the oil quantity is insufficient, the hydraulic oil of the same specification and model should be supplemented to avoid the mixing of different grades of oil products affecting the system performance. At the same time, it is necessary to check whether there are any traces of oil leakage at the bottom of the tank and the pipeline interface. If leakage is found, the leakage should be checked in time.

Secondly, it is necessary to do a good job in the appearance inspection of the exposed components, one by one to check whether the hydraulic pipeline has any signs of wear, aging, and cracking, whether the joints are loose, and whether the lifting cylinder and steering cylinder are deformed or scratched to avoid sudden failures such as pipeline bursting and cylinder pressure relief during operation.

Regular maintenance is the core requirement to ensure the long-term stable operation of a hydraulic system.

It is necessary to complete the replacement and filtration of hydraulic oil according to the standard cycle of equipment use. Long-term use of hydraulic oil will cause oxidation and increase in impurities. When replacing, it is necessary to completely empty the old oil in the tank, clean the sediment on the inner wall of the tank, and replace the hydraulic oil filter device synchronously to avoid impurities from entering the pipeline.

It is also necessary to regularly carry out pressure testing and seal investigation, calibrate the working pressure of the hydraulic system according to the standard parameters, and do not arbitrarily increase the rated pressure of the safety valve to avoid long-term overload operation of the system. If the seals are found to have aging, elasticity decline, oil leakage, etc., it is necessary to replace the seals of the same specification in time to avoid problems such as insufficient pressure and weak lifting.

During daily use, it is also necessary to protect the hydraulic system, and do not operate beyond the rated load for a long time to avoid the hydraulic system being in a high-load state for a long time to accelerate the aging of components. Before operating in a low-temperature environment, it is necessary to idle for a period of time. After the hydraulic oil temperature rises to the normal range, the operation is carried out to avoid damage to the hydraulic pump due to low oil temperature and high viscosity.

Adhering to the above maintenance points can effectively reduce the probability of hydraulic system failure, improve the operation stability of electric forklifts, and reduce the overall operation and maintenance costs.