After the excavator has been working for a long time, more and more problems will be discovered during maintenance. Today, we will briefly talk about some problems that may occur due to the aging of the excavator’s hydraulic system.
1. The main particulate impurities in the hydraulic system come from the normal mechanical wear and tear of the hydraulic system, and dust will also be brought in by the air sucked into the fuel tank. “Disassembly and assembly pollution” caused by hydraulic system overhaul “iron filings and impurities crushed by the large hydraulic pump that are less than 10 microns smaller than the filtration accuracy of the hydraulic oil filter are all present in the oil.”
2. When the hydraulic oil is used for 2000 hours, the oil will also be entrained with a few fine air bubbles in the flow. From then on, the oil will be oxidized. The acidic substances generated after the oxidation of the hydraulic oil will change the color of the oil, either red or Black, increases corrosion to metals. The sludge deposits produced by corrosion will block the small gaps in the hydraulic oil filters, hydraulic oil radiators and distributors. In addition, due to the temperature difference between morning and evening in different places and the natural cold and heat of mechanical work, the hot air in the hydraulic oil tank turns into water droplets after cooling, so the hydraulic oil will inevitably come into contact with moisture. Moisture, air, and acidic substances produced after oxidation will have a negative impact on the metal. Rust and corrosion affect the normal operation of the hydraulic system.
3. In the hydraulic oil tank, the bubbles mixed into the oil will circulate with the oil, which will reduce the pressure of the system, worsen the lubrication conditions, produce abnormal noise, the hydraulic piston rod will turn black, the speed of the machine will slow down, and the movements will be incoherent. Commonly known as “mechanical cerebral thrombosis”. When the sediment blocks the hydraulic oil radiator, the hydraulic oil will reach a high temperature, reaching more than 70 degrees. At high temperatures, the hydraulic oil will lose its anti-wear lubrication function. If the hydraulic oil is exposed to high temperatures for a long time, it will increase mechanical wear and tear. Vibration, in addition, the bubbles also increase the contact area between the oil and the air, accelerating the oxidation of the oil. Since the hydraulic oil radiator is outside the engine water tank radiator, the hydraulic oil radiator is sucked by the engine fan at high temperatures. , it will also increase the temperature of the antifreeze inside, causing the engine to dissipate abnormally and become too high, so the vehicle speed will slow down a lot. Hydraulic oil at high temperatures will also cause oil pipe bursts, oil seal rupture, piston rods to turn black, etc., which will cause car owners causing serious economic losses.
As the working hours of excavators increase, many aging accessories also need to be replaced in time. If you need to purchase excavation accessories, you can contact us. If you want to buy a second-hand excavator, you can also contact us. CCMIE gives you the most comprehensive purchase assistance.
Post time: Sep-10-2024