After the hydraulic pump is installed, it must be filled with clean hydraulic oil through the oil drain port on the tie shell before starting for the first time, otherwise it cannot be started. After installing the hydraulic pump and motor and connecting the system correctly, inject clean oil into the pump or motor, remove the upper drain pipe, and tighten the joint after seeing the oil flow out. The starting of the hydraulic pump has the following contraindications: 1. Rotate the coupling by hand to check the state of the pump shaft. It is forbidden to have uneven force during rotation, loose installation, and two couplings with different shafts.

First, the definition of hydraulic system The hydraulic system is mainly divided into the transmission system and the control system. A complete hydraulic system requires five parts, including power components, actuators, control components, auxiliary components and hydraulic oil. The hydraulic system we often say is mainly used to transmit power and movement. Transport hydraulic oil, etc.

The overall structure of the single bucket hydraulic excavator includes power unit, working unit, slewing mechanism, operating mechanism, transmission system, walking mechanism and auxiliary equipment. The power unit of the single-bucket hydraulic excavator is mostly an upright multi-cylinder, water-cooled, one-hour power-calibrated diesel engine.

The high-speed hydraulic compactor is driven by the hydraulic system of the excavator and the loader, which can effectively deal with the weak grinding area of the dynamic compactor, and the effective depth can reach 4~10 meters. It is mainly composed of hydraulic system, high-speed oil cylinder, seals, sensors, controllers and other important components.

At the beginning of the new year, manufacturing tax cuts and fee reductions ushered in a "New Year gift package". On January 5, Li Keqiang, member of the Standing Committee of the Political Bureau of the CPC Central Committee and Premier of the State Council, said when presiding over a symposium on tax reduction and fee reduction, large-scale tax reduction and fee reduction are key measures for macro-control. Affected by multiple factors at home and abroad, China's economy is facing new downward pressure. We must promptly implement new and stronger combined tax and fee reductions to ensure a stable start to the economy in the first quarter and stabilize the macroeconomic market.

The "Opinions of the Central Committee of the Communist Party of China and the State Council on Accelerating the Construction of a Large National Market" was released on the 10th, from strengthening the unification of basic market systems and rules, promoting high-standard connectivity of market facilities, creating a unified market for factors and resources, and promoting high-level unification of commodity and service markets. Promoting fairness and unification of market supervision and further regulating unfair market competition and market intervention, and clarifying key tasks in six areas, aiming to continue to promote the efficient and smooth expansion of the domestic market, accelerate the creation of a stable, fair, transparent and predictable business environment, and further reduce market transactions. cost, promote scientific and technological innovation and industrial upgrading, and cultivate new advantages in participating in international competition and cooperation.