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As we often see twin-shaft compulsory mixer concrete twin shaft mixer, users often apply some butter on the transmission gear and lubricating grease on the chains before starting the concrete mixer. Clean the chain every 300 hours and open the coverings of every transmission chains every week. After using the concrete mixer, discharge the materials in the storage completely and cut down the power supply. Check the fastening situation of mixing arms and mixing blades. Fasten it immediately if they are loose.Henan Daswell Machinery is a professional manufacturer of mining machine for almost 30 years in China. We are dedicated to supplying our customers with best service and products, our major products include:mobile concrete mixing plant,concrete batching plant,batch plant,If you are interested in our products, please contact us freely: sales@daswell.com As the service life of concrete mixer is closely connected with daily maintenance, the concrete mixer should be repaired and maintained properly. 1. Regularly check the fastening bolts of every part, especially mixer base, motor base, mixing blades and lining plate, which can avoid loosening. 2. Change the mixing blades with torque wrench and locking torque should be from 200N.m to 220N.m. 3. When the gap between the mixing blades and the lining plate is too big, the horizontal distance of mixing drum on both ends should not be bigger than 5mm. 4. Regularly change the lubricant oil in the reducer according to requirements. 5. Check the lubricating pump of concrete mixer whether it is in normal operation. 6. Before and after using concrete mixer every time, clean the mixing drum, mixing shaft and mixing blades. 7. Clean and lubricate the synchronous gear and transmission chains regularly. 8. In the cold weather, the water conserving in the water spray system must be eliminate completely.