Excavator winter maintenance and misunderstanding and precautions

Since entering the wi

nter, although most excavator users in North China and Northeast China have begun to enter the “winter rest period”, there are still some equipments fighting on the construction site. In low temperature weather, the test of equipment will be more severe than usual. How to better operate and maintain the equipment and become a problem in front of every user and operator, but for a variety of reasons, many operators are not familiar with the maintenance of the excavator spare parts, and some daily habits are also There are often misunderstandings. When it comes down for a long time, it often causes damage to the equipment. So what are the misunderstandings in the maintenance of the excavator during winter construction? What kind of damage will these wrong maintenance habits bring to the excavator?

Wrong way one: the serious consequences of premature or no cooling water release: the engine body bursts or shrinks and cracks

Before the flameout, run at idle speed. When the temperature of the cooling water drops below 60 °C, the water is not hot, and then the fire is released. If the cooling water is released too early, the body will suddenly shrink and crack when the temperature is high. When releasing water, the remaining water in the body should be completely drained to prevent it from swelling and causing the body to burst. Komatsu excavator spare parts

Wrong second: the serious consequences of using fuel alone: reducing engine life and increasing the chance of damage

The low temperature in winter makes the fluidity of diesel oil worse, the viscosity increases, and it is not easy to spray, resulting in poor atomization and deterioration of combustion, resulting in a decrease in the power and economic performance of the diesel engine. Therefore, light diesel with low freezing point and good firing performance should be used in winter. Generally, the freezing point of the diesel engine should be lower than the local minimum temperature of 7-10 °C.

Wrong way 3: The serious consequences of starting with an open flame can help burn the machine, but damage the engine.

The air filter cannot be removed, and the cotton yarn is ignited with diesel oil to make a igniting material placed in the intake pipe to perform combustion-supporting start. In this way, during the starting process, the dusty air of the outside will be directly sucked into the cylinder without being filtered, causing abnormal wear of the piston, the cylinder and the like, and the diesel engine may be rough and damage the machine.

Wrong practice 4: The serious consequences of baking the oil sump with an open flame: the machine burns down the machine, and the komatsu spare parts machine wear is aggravated.

In order to prevent the oil in the oil pan from deteriorating or even burning, the lubricating performance is reduced or completely lost, thereby aggravating the wear of the machine. In the winter, the oil with low freezing point should be used. When starting, the temperature of the oil can be increased by using the external water bath heating method.

Wrong Practice 5: Serious consequences of improper start-up methods: serious damage to the machine

In the winter, some drivers are able to start the diesel engine quickly, often using an abnormal starting method that starts without water (first start, then add cooling water). This practice can cause serious damage to the machine and should be banned. The correct preheating method is:

firstly cover the heat preservation hood on the water tank, open the drain valve, continuously inject 60-70 °C clean soft water into the water tank, and touch the water flowing out of the drain valve to feel the hot feeling, then close the drain valve. Fill the water tank with clean soft water of 90-100 ° C and shake the crankshaft so that the moving parts are properly pre-lubricated before starting.

Wrong Practice 6: Serious consequences of low temperature load operation: causing serious wear and tear on the machine

After the diesel engine started to catch fire, some drivers could not wait to immediately put into the load. Diesel engines that are on fire for a long time, because of the low temperature of the body, the viscosity of the oil is large, and the oil is not easily charged into the friction surface of the moving pair, which may cause serious wear of the machine.

In addition, the plunger spring, the valve spring and the injector spring are also susceptible to breakage due to "cold brittleness". Therefore, after the diesel engine starts to catch fire in the winter, it should be idling at a low medium speed for a few minutes. When the temperature of the cooling water reaches 60 °C, it is put into the load operation. Wrong Practice 7: Do not pay attention to the serious consequences of the body insulation: reduce the working life, damage the engine

Low temperatures in winter make it easy to cool the diesel engine while it is working. Therefore, insulation is the key to using diesel engines in winter. In the northern region, diesel engines used in winter should be equipped with insulation devices such as insulation jackets and insulation curtains. In addition, the thermostat plays an important role in heating the diesel engine during operation. Therefore, it is necessary to check whether the work of the thermostat is normal before entering the winter, and the failed thermostat should be replaced in time.