1. When driving a bulk cement truck, do not exceed speed or pressure, as exceeding speed or pressure can seriously damage the air compressor. The maximum speed of this machine can be found in the main technical parameter table, and the working pressure is 0.2MPa. 2. Do not start or stop the air compressor quickly, but slowly increase or decrease the speed, otherwise the impulse pressure will damage the air compressor. 3. Do not change the rotation direction of the air compressor, otherwise the oil pump will not supply oil and the machine will be severely damaged. 4. Do not stop the air compressor before reducing pressure, otherwise the powder material may flow back into the cylinder, causing serious damage to the air compressor. 5. Before starting up, check the oil level. The oil level shall not be lower than the lower limit of the oil mark; It is necessary to regularly check whether the oil pump is supplying oil. If it is not supplying oil, it should be stopped immediately for inspection. Otherwise, a shortage of oil will seriously damage the air compressor. 6. Lubricating oil should be replaced on schedule. After using the new machine for 30 hours, drain the oil from the crankcase, clean the inside of the crankcase and the oil filter, and then change the oil. Change the oil as mentioned above once a year in the future. 7. Check and clean the oil filter screen. Under normal circumstances, the machine should be inspected and cleaned once a quarter. If the machine usage rate is high, it should be inspected and cleaned once a month. 8. The lubricating oil used in this machine is CD40 diesel engine oil. It is prohibited to mix different grades of lubricating oil, otherwise the deterioration of the lubricating oil will affect the lubrication effect. 9. Maintain and clean the air filter every 30 hours of work. While rotating the filter element, blow compressed air with a pressure of less than 0.6MPa from the inside out. After maintenance for five times, please replace the filter with a new one. It is strictly prohibited to clean the filter element with oil or water.