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.
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.
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.
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.