1、 Prevent the concrete from sticking to the tank. After unloading at the construction site, the feeding hopper, discharging hopper, discharging chute, etc. shall be washed immediately with the hose attached to the mixer truck, and the sludge and concrete adhered to the vehicle body shall be cleaned. On the way back to the mixing plant, 150-200l water should be injected into the mixing drum to clean the concrete residue bonded on the wall and blades of the drum. At the end of each day's work, the driver shall be responsible for injecting clean water into the mixing drum and rotating at high speed (14-18 RPM) for 5-10 minutes, and then discharging the water to ensure the cleanness of the drum. When using high-pressure water to clean each part of the mixing drum, attention should be paid to avoid the instrument and control rod. The distance between the spray nozzle and the paint surface shall not be less than 40 cm.
二、清洁工作。清理搅拌筒内外积污及残存的混凝土渣块时，以及在机修人员进入筒内进行检修和焊补作业时，需先关闭汽车发动机，使搅拌筒完全停止转动。在机修人员进入筒内工作期间，须保证拌筒内通风良好，空气新鲜，无可然气体及有害灰尘，氧气供应充足。在筒内使用电动工具操作时，操作人员须有良好的绝缘保护。
2、 Cleaning work. When cleaning up the dirt and residual concrete slag inside and outside the mixing drum, as well as when the maintenance personnel enter the drum for maintenance and welding repair, it is necessary to turn off the automobile engine to stop the mixing drum completely. During the working period, the maintenance personnel must ensure that the mixing cylinder is well ventilated, the air is fresh, there is no natural gas and harmful dust, and the oxygen supply is sufficient. When using electric tools in the cylinder, operators must have good insulation protection.
三、防护工作。在自动上料搅拌车工作时，不得将手伸入旋转的搅拌筒内，严禁将手伸入主卸料溜槽和加长卸料溜槽的连接部位，以免发生事故。
3、 Protection work. When the automatic feeding mixer is working, it is not allowed to extend the hand into the rotating mixing drum. It is strictly forbidden to extend the hand into the connection part of the main discharge chute and the extended discharge chute, so as to avoid accidents.
四、液压系统压力应符合使用说明书中的规定，不得随意调整。液压油的油质和油量应符合原定要求。
4、 The pressure of the hydraulic system shall meet the requirements of the operation manual and shall not be adjusted at will. The quality and quantity of hydraulic oil should meet the original requirements.
