Good hydraulic oil cooling system (or rather should be hydraulic oil temperature control system) improvements for large hydraulic excavator hydraulic oil cooling system, although the specific way each manufacturer uses different, but the basic idea is the same supply Crawler excavators, both the hydraulic oil temperature in continuous operation in the ideal balance range, but also make the hydraulic system in the cold state to work quickly when heated (oil reaches normal operating temperature range). In the case of using a qualified premise hydraulic oil, hydraulic oil when there is overheating, the temperature of the hydraulic oil cooling system checked as follows: ①, hydraulic oil cooler if there is dirt clogging 360 hydraulic crawler excavators, resulting in heat efficiency drops, if necessary, cleaning the radiator. ②, fan speed detection system actual operating pressure in extreme conditions, the hydraulic circuit to determine whether a fault occurs, whether the working oil temperature sensor is normal or control circuit. At this point the fan speed and the system should be for a maximum working pressure; otherwise, the response system parameters can be adjusted accordingly or replace damaged components. Currently large hydraulic excavator pump control, there are two main methods: limit load regulator with pressure shut-off function (ie CUT-OFF function) (GLR) and load sensing regulator (LS) mode. The effect of the CUT-OFF function is that when the system pressure reaches the setting value working, the swash plate angle of variable displacement pump is reduced, so that the pump can only be maintained at the required pressure to maintain the "residual" flow state to avoid overflow overflow valve overheating. To achieve this purpose, the system parameters to match the technical requirements so that it is set according to the value of CUT-OFF valve is lower than the setting value of primary circuit pressure valve; otherwise, the primary pressure relief valve to open will cause overheating. Meanwhile crawler excavators Quote, check whether the secondary valve is working properly, this work must be carried out strictly in accordance with the technical requirements, respond to system-related parameters necessary for recovery of the adjustment. Tracked from chain "release" How to choose butter grease fittings needed each time to shop or agent can see a lot of points accumulated yellow drums, various models of different brands. So how do we choose butter really need it? When selecting grease primarily mechanical condition should be considered where relevant, work status (continuous operation, intermittent operation, with or without vibration and shock) and the working environment (humidity, temperature, air pollution levels, etc.) on several factors. When the temperature is high, such as in the summer, you should choose a small evaporation losses, relatively strong oil; when using a temperature as low as the winter, you should choose a small viscosity, relatively thick oil release. Large load, extreme pressure additives should be selected or fillers (molybdenum disulfide, graphite) grease; in contact with water or damp air environment, should be used, such as lithium, lithium complex grease good water resistance, etc. seaside or chemical media environment, the choice of a good anti-rust performance grease; dust long crawler excavators, should choose a more dense and hard, good sealing grease to prevent contamination; like excavator hammer with vibration function The rollers, tampers size of various models should be used, such as high viscosity, good damping grease, such as high viscosity lubricant cycloalkyl or mixed base complex soap thickened grease. In meeting the requirements of the situation, try to use lithium grease, complex soap grease, polyurea grease and other pleiotropic universal grease. Thus, reducing the fat varieties, but also simplifies the management of stored fat.泰安嘉 and Heavy Machinery Co., Ltd. factory direct crawler excavators, Kerry and Heavy (certified), Crawler excavators provided by 泰安嘉 and Heavy Machinery Co., Ltd .. Taian Jia and Heavy Machinery Co., Ltd. (www.tajhzg.com/) is Tai'an, a leader in mining machinery, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Heavy leadership in Kerry and the staff warmly welcome all inquiries negotiations to create Kerry and Heavy better future.