Digging machine also bitter summer! Summer is coming, how to treat the "three high" excavator?

[BONOVO]

There are many projects in summer, and it is precisely the season when excavatorfail frequently. "Three heights" is a common problem in excavatorconstruction in summer, which is the main factor leading to failure and shutdown.

The temperature of the water tank is too high, commonly known as "boiling pot". "Boiling pot" affects the normal heat dissipation of the engine, and then causes the high-temperature expansion deformation of the engine parts, such as the piston and piston ring are stuck by thermal expansion, and the high temperature aggravates the oil oxidation and accelerates the wear of moving parts. To prevent "boiling pot", the old drivers have their own tricks, some people modify the water tank, some people add air cooling, some people simply remove the hood of the water tank directly.



In fact, under the premise of not destroying the beauty, the correct use of antifreeze can effectively avoid boiling. Antifreeze has two characteristics: low freezing point and high boiling point. Therefore, it can not only ensure the normal operation of the vehicle system in winter, but also prevent the cooling water from boiling in summer. The anti-rust and anti-corrosion function of antifreeze can also slow down the aging of the entire cooling system, and the anti-scale function can prevent scale from blocking the circulation pipeline.

When the temperature of the hydraulic oil is too high, the viscosity, lubricity and wear resistance of the oil will be significantly reduced, which will not only lead to an increase in leakage, but also destroy the oil film of the sliding parts, which will aggravate the wear of the hydraulic components, so the hydraulic oil with slightly higher viscosity should be selected in summer. The conventional temperature of hydraulic oil is between 30 ° C and 55 ° C. When the temperature of hydraulic oil continues to increase, the hydraulic components expand according to different coefficients, and the stuck fault may also occur, and the shutdown and maintenance are inevitable. The prevention of high temperature of hydraulic oil depends on daily inspection and maintenance, such as regularly dusting and cleaning the radiator, which can maintain the heat dissipation performance.

If the temperature of the grease is too high, the grease becomes soft, the adhesion performance is reduced, and the grease is easily lost. At this time, the working device and the rotating device will cause various "unitary" such as high temperature, wear and noise due to poor lubrication. The main reason for the failure of grease is the shrinkage of gel and the evaporation loss of base oil. High temperature is the main culprit that leads to the increase of evaporation of grease, oxidation deterioration and severe condensation of oil. Therefore, it is necessary to choose a grease with good high temperature performance in summer, not only to maintain the adhesion performance at a higher temperature, but also to ensure that the failure process is slow.

Summer vegetation is lush, insects and birds are active, it is difficult to ensure that there will be no flying insects desperate to enter the carriage, it is difficult to ensure that there will be no catflocs adsorbed to the water tank, it is difficult to ensure that there will be no dead branches and rotten leaves stuffed into the radiator, which is causing high temperature engine, high temperature deterioration of hydraulic oil, air conditioning refrigeration is not good. In addition, for some "old" excavator, the hood and sponge at the water tank and radiator are damaged or fallen off, resulting in abnormal fan suction, which may cause poor heat dissipation.

Good operators have good maintenance habits, such as cleaning and removing impurities in free time; Always pay attention to the water temperature table number; Idle in the nearest cool place when the water temperature is high; Check frequently for lack of antifreeze; Always check the tension and fatigue of the fan belt... All are good habits to ensure the healthy construction of excavator. In addition, when the temperature of the small excavator engine is too high, do not immediately turn off the engine to prevent the engine from overheating and causing a cylinder accident, and then turn off the engine after idling to cool down.

When idle, park the equipment in the shade to cool down, but do not use cold water to pour tires and flush brakes to force cooling.

The construction of the crawler excavatorafter rain should pay attention to: when the water overflows the rotary gear ring, the grease in the gear ring should be replaced in time to prevent the sand from mixing in the grease leading to the wear of the gear and gear ring. When wading, do not tilt the excavator more than 15° to avoid invading the water and damaging the radiator. It is rainy in summer, and the track expansion cylinder should also be regularly dredged to prevent rust.

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