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1. Check and test the concrete mixer as the requirements of operation instruction before starting concrete mixer. Check the rotation direction of mixing drum and mixing blades, the operation of the work unit, and brake whether they are normal before operating.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:China electric mobile concrete mixer,mobile block making machine,concrete mixer,If you are interested in our products, please contact us freely: sales@daswell.com 2. After concrete mixer starts, feeding should be taken when the mixing drum rotation reaches normal speed mobile concrete mixer, and add water timely after feeding. The addition of new materials should be taken after discharging the original concrete. It is forbidden to stop it when mixing concrete and overloading, except reverse discharging. 3. Concrete mixer should be installed on the hard and flat ground and firmed by wood or strut, and users should keep the tire from pressure. If the use time is more than 3 months, keep properly the tire and do some cleaning and rust prevention work. 4. When the concrete mixer is working, if there are some faults that the concrete mixer can not work, cut down the power supply immediately and clean out the concrete and then you can repair the concrete mixer.