Recently, as the northern region ushered in a new round of cold wave, the operation challenge of excavators in cold winter has become increasingly prominent. In the cold environment, the density of diesel becomes larger, viscosity increases, and mobility becomes worse, which will not only lead to diesel is not easy to spray, poor atomization, but also cause incomplete combustion, and then increase fuel consumption, reduce efficiency, seriously affect the power and economy of diesel engine.

To cope with this challenge, light diesel oil should be selected for excavators in winter because of its low freezing point and good ignition performance, which can better adapt to cold weather. Generally, the freezing point of diesel oil should be about 10 ° C lower than the local minimum temperature of the current season. Therefore, in the northern region, excavators may need to use No. 0 diesel oil or even No. -30 diesel oil.

In addition to choosing the right diesel oil, excavators also need to pay attention to the choice of oil and grease in winter. As the temperature decreases, the viscosity of the oil increases and the fluidity becomes worse, which will lead to the rotation resistance of the crankshaft, the wear of the piston and cylinder liner increases, and then cause the difficulty of starting the diesel engine. Therefore, the excavator operating in the north of our country and the plateau and alpine areas should replace the oil with higher label in winter. In the choice of grease, the winter should choose small viscosity, thinner grease, to ensure the normal operation of the equipment.

In addition, the excavator also needs to pay attention to the problem of water replying in winter. Before entering winter, the engine cooling water should be replaced with coolant with a lower freezing point, and the cooling water in the engine should be emptied during shutdown to prevent ice expansion and cracking of the body. At the same time, after the diesel engine starts and fires, do not immediately let the excavator put into load operation. It should idle for 3-5 minutes first. When the speed of the engine increases and the temperature of the cooling water reaches more than 60 ° C, then put into load operation.

Finally, whether it is winter construction or winter repair, it is necessary to pay attention to the insulation of key components of the excavator. For example, blocking the wind with the plate curtain in front of the radiator, turning the switch to the low temperature gear in winter, and parking the excavator in the garage and other indoor places are effective thermal insulation measures.

In summary, the operation of excavators in cold weather requires special attention to the selection of appropriate fuel oil, oil and grease, as well as attention to water replilling issues and heat preservation of key components. These measures will help ensure the normal operation of excavators in winter, improve operational efficiency and reduce operating costs.