The abrasion of mixing blades of concrete mixer truck shall be inspected regularly and repaired and replaced in time;

▼贯彻各项有关操作规范。4方混凝土搅拌车司机须经过培训，无合格证者不得上岗操作；

All relevant safety operation specifications shall be implemented. The driver of 4-m3 concrete mixer shall be trained professionally, and those without certificate shall not work;

▼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；

The pressure of the hydraulic system shall comply with the provisions in the operation manual and shall not be adjusted at will. The quality and quantity of hydraulic oil should meet the original requirements;

▼工作时，不得将手伸入旋转的搅拌筒内，严禁将手伸入4方混凝土搅拌车主卸料溜槽和加长卸料溜槽的连接部位，以免发生事故；

When working, do not put your hand into the rotating mixing drum, and do not put your hand into the connection between the unloading chute and the lengthened discharge chute of the owner of the 4-square concrete mixer, so as to avoid accidents;

▼环境温度高于+25摄氏度，从装料、运输、到卸料延续时间不得超过60分钟，混凝土搅拌车环境温度低于+25摄氏度，上述时间不得超过90分钟；

If the ambient temperature is higher than + 25 ℃, the duration from loading, transportation to unloading shall not exceed 60 minutes; if the ambient temperature of concrete mixer truck is lower than + 25 ℃, the above time shall not exceed 90 minutes;

▼冬期施工时，应切实做到：开机前检查是否结冰；下班时认真排除4方混凝土搅拌车拌筒内及供水系统内残存积水，关闭水泵开关，将控制手柄置于“停止”位置；

During winter construction, it is necessary to check whether there is icing before starting the machine; when off duty, carefully remove the residual water in the mixing drum and water supply system of the 4-square concrete mixer truck, turn off the water pump switch, and put the control handle at the "stop" position;

▼在施工现场卸料完毕后，应立即用混凝土搅拌车随带的软管冲洗进料斗、出料斗、卸料溜槽等处，粘附在车身各处的污泥及混凝土。在返回搅拌站的途中，应向搅拌筒内注150---200L水以清洗筒壁及叶片粘结的混凝土残渣；

After unloading at the construction site, the inlet hopper, discharge hopper and discharge chute should be flushed with the hose attached to the concrete mixer to remove the sludge and concrete adhering to the vehicle body. On the way back to the mixing station, 150-200l water should be injected into the mixing drum to clean the concrete residue bonded by the cylinder wall and blades;

▼混凝土搅拌车装料前，应先排净拌筒内残存的积水和杂物。在运输过程中要不停的转动，以防混凝土离析。4方混凝土搅拌车到达工地和卸料之前，应先使拌筒全速以14—18转/分转动1—2分钟，然后再进行反转卸料。反转之前，应使搅拌筒停稳不转；

The residual water and sundries in the mixing drum shall be drained before the concrete mixer is loaded. In the process of transportation, keep rotating to prevent concrete segregation. Before arriving at the construction site and discharging, the mixing drum should be rotated at full speed at 14-18 rpm for 1-2 minutes, and then reverse unloading should be carried out. Before reversing, the mixing drum should be stopped stably;

▼每天工作结束后，司机应负责向搅拌筒内注入清水并高速（14—18转/分）旋转5—10分钟，然后将水排去，以保障混凝土搅拌车筒内清洁。用高压水清洗搅拌筒各个部分时，应注意避开仪表及操纵杆等部位。压力水喷嘴与车身油漆表面间的距离不得小于40厘米；

Every day after the work, 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 drain the water to ensure the cleanness of the concrete mixer drum. When cleaning each part of the mixing drum with high pressure water, pay attention to avoid the instrument and control rod. The distance between the pressure water nozzle and the paint surface of the car body shall not be less than 40 cm;

▼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，须保障拌筒内通风良好，空气新鲜，无可然气体及有害灰尘，氧气供应充足（不得使用纯氧）。在筒内使用电动工具操作时，4方混凝土搅拌车操作人员须有良好的绝缘保护。

It is necessary to turn off the motor engine to stop the mixing drum completely when removing the dirt and residual concrete slag inside and outside the mixing drum, and when the machine maintenance personnel enter the cylinder for maintenance and welding repair. During the period when the machine maintenance personnel enter the cylinder, they must ensure that the mixing drum is well ventilated, the air is fresh, there is no combustible gas and harmful dust, and the oxygen supply is sufficient (pure oxygen is not allowed). When the electric tools are used in the cylinder, the operators of the 4-m3 concrete mixer must have good insulation protection.

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