The driving device of cement concrete mixer truck is used to drive the concrete storage tank to rotate. It is composed of power take-off, universal shaft, hydraulic pump, hydraulic motor, control valve, hydraulic oil tank and cooling device. If this part stops working due to failure, the storage tank of the concrete mixer truck will not rotate, which will lead to the scrapping of the concrete in the truck, and even the whole tank of concrete will condense in the tank, resulting in the scrapping of the concrete mixer truck. Therefore, whether the driving device is reliable or not is a problem of great importance in use. In order to ensure the integrity and reliability of the driving device, the following maintenance work shall be done:

a．万向转动部分是故障多发部位，应按时加注润滑脂，并经常检查磨损情况，及时修理更换。车队应有备用的万向轴总成，以保证一旦发生故障能在几十分钟内恢复工作。

a. The universal rotating part is a fault prone part, so the lubricating grease shall be filled on time, the wear shall be checked frequently, and the parts shall be repaired and replaced in time. The fleet shall have spare cardan shaft assembly to ensure that it can resume operation within tens of minutes in case of failure.

b．保证液压油清洁。混凝土搅拌车工作环境恶劣，一定要防止污水泥沙进入液压系统。液压油要按使用手册要求定期更换。一旦检查时发现液压油中混入水或泥沙，就要立即停机清洗液压系统、更换液压油。

b. Ensure that the hydraulic oil is clean. The working environment of concrete mixer truck is bad, so it is necessary to prevent dirty cement sand from entering the hydraulic system. The hydraulic oil shall be replaced regularly according to the requirements of the operation manual. Once water or sediment is found in the hydraulic oil during inspection, stop the machine immediately to clean the hydraulic system and replace the hydraulic oil.

c．保证混凝土搅拌车液压油冷却装置有效。要定时清理液压油散热器，避免散热器被水泥堵塞，检查散热器电动风扇运转是否正常，防止液压油温度超标。液压部分只要保证液压油清洁，一般故障不多；但生产厂家不同，使用寿命则不一样。

c. Ensure that the hydraulic oil cooling device of concrete mixer truck is effective. Clean the hydraulic oil radiator regularly to prevent the radiator from being blocked by cement. Check whether the electric fan of the radiator operates normally to prevent the hydraulic oil temperature from exceeding the standard. As long as the hydraulic part keeps the hydraulic oil clean, there are few general faults; However, different manufacturers have different service life.

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