Precautions For Cement Mixer Trucks

1. The hydraulic system pressure should comply with the provisions in the instruction manual and should not be adjusted at will. The quality and quantity of the hydraulic oil should meet the original requirements. 2. Before loading the concrete mixer truck, the remaining water and debris in the mixing drum should be drained first. During transportation, it should be rotated continuously to prevent concrete segregation. Before the concrete mixer truck arrives at the construction site and unloads, the mixing drum should be rotated at full speed at 14-18 rpm for 1-2 minutes, and then reversed to unload. Before reversing, the mixing drum should be stopped.
3. When the ambient temperature is higher than +25 degrees Celsius, the duration from loading, transportation, to unloading shall not exceed 60 minutes. When the ambient temperature is lower than +25 degrees Celsius, the above time shall not exceed 90 minutes.
4. During winter construction, it should be done in earnest: check whether there is ice before starting the machine; carefully remove the remaining water in the mixing drum and the water supply system when leaving get off work, turn off the water pump switch, and put the control handle in the "stop" position.
5. After unloading at the construction site, the hose provided with the mixer truck should be used to immediately flush the feed hopper, discharge hopper, discharge chute, etc. to remove the sludge and concrete adhering to various parts of the vehicle body. On the way back to the mixing station, 150-200L of water should be poured into the mixing drum to clean the concrete residues attached to the drum wall and blades.
6. After work every day, the driver should be responsible for injecting clean water into the mixing drum and rotating it at high speed (14-18 rpm) for 5-10 minutes, and then draining the water to ensure that the drum is clean. When using high-pressure water to clean various parts of the mixing drum, be careful to avoid the instrument and joystick. The distance between the pressure water nozzle and the paint surface of the vehicle body shall not be less than 40 cm.
7. When removing the accumulated dirt and remaining concrete slag inside and outside the mixing drum, and when the mechanic enters the drum for inspection and welding repair, the car engine must be turned off first to completely stop the mixing drum. During the period when the maintenance personnel enter the drum to work, it must be ensured that the mixing drum is well ventilated, the air is fresh, there is no natural gas and harmful dust, and the oxygen supply is sufficient (pure oxygen must not be used). When using power tools in the drum, the operator must have good insulation protection.
8. When working, do not put your hands into the rotating mixing drum, and it is strictly forbidden to put your hands into the connection between the main discharge chute and the extended discharge chute to avoid accidents.
9. The wear of the mixing blades should be checked regularly and repaired and replaced in time.
10. Implement all relevant safety operation specifications. Concrete mixer truck drivers must undergo professional training, and those without a certificate of qualification are not allowed to operate on the job.