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Excavator Engine Crankshaft Fracture Problem

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 The fracture of the crankshaft usually starts from the smallest crack, and most of the cracks occur in the connection part with the crank arm at the fillet of the connecting rod journal of the head cylinder or the end cylinder. During the operation, the crack gradually expands and suddenly breaks when it reaches a certain level. The brown part is often found on the broken surface, which is an old crack, and the shiny and shiny tissue is the trace that developed to the sudden breakage later. LandTopMall is a store that integrates various engine parts such as excavators and diesel engines. There are many high-quality parts in our store. For instance, crankshafts fit for Yanmar 4tnv94l engine were the best-selling.     Engine Crankshaft Fracture Problem The rounded corners at both ends of the crankshaft journal are too small When grinding the crankshaft, the grinder failed to correctly control the axial fillet of the crankshaft. In addition to the rough surface processing, the fillet ra
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How to Choose the Excavator Filter Correctly?

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  Consequences of Using Different Types of Filter Elements: 1. Use low-priced filter paper and filter screen, because the filter paper and filter screen have large pore size, poor uniformity, and low filtering effect, and cannot effectively remove harmful impurities from the excavator, thereby causing wear and tear to the excavator. service life is shortened. 2. Use low-quality adhesives with a small amount, which are neither oil-resistant nor water-resistant, nor can they be firmly bonded, resulting in a short circuit outside the excavator filter element bonding; The harmful substances enter the generator, reducing the service life of the excavator. 3. Using ordinary rubber parts, due to the failure of the internal seal, the internal short circuit of the filter will cause the excavator engine to wear, shorten its life, or deform the external seal, and a large amount of oil will be released in a short time, causing serious damage. 4. The welding point of the excavator filter element is
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What is the Principle of Selection and Replacement of Hydraulic Oil for Excavators?

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 According to relevant statistics, about 70% of hydraulic system failures of excavators are caused by the improper selection of hydraulic oil, careless use, and untimely replacement. Therefore, the correct and reasonable selection and replacement of hydraulic oil is an important condition for exerting the working performance and economic performance of the excavator and prolonging the service life of the hydraulic system and its components.     Generally, the hydraulic equipment manufacturer stipulates the type, grade, and viscosity level of the hydraulic oil used in the equipment system in the equipment manual or user manual. The user should first select the hydraulic oil according to the equipment manufacturer's recommendation. But sometimes, you need to choose hydraulic oil by yourself, how to choose it? As a professional editor of LandTopMall , I will introduce you to the principles of selecting hydraulic oil for excavators, as follows: Environmental Conditions According to the
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Why Do You Need to Maintain Excavator Accessories Regularly?

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 Many people know that excavator accessories require long-term maintenance, but do not know their real purpose and importance. There are three main reasons for maintaining the excavator. One is to reduce the failure of the machine, thereby prolonging the service life of the machine; the second is to shorten the downtime of the machine; the third is to improve work efficiency and reduce operating costs. As long as the daily management of fuel, lubricating oil, water, and the air is done well, 70% of the failures can be avoided.     Fuel Management Different brands of diesel oil should be selected according to different ambient temperatures; diesel oil should not be mixed with impurities, lime soil, and water, otherwise, the fuel pump will be worn out prematurely; the paraffin and sulfur content in inferior fuel oil will cause damage to the engine; daily work After finishing, the fuel tank should be filled with fuel to prevent water droplets from forming on the inner wall of the fuel tan
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What's the Reaction to a Broken Engine Connecting Rod Bearing?

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  What's the Reaction to a Broken Engine Connecting Rod Bearing? The main manifestations of broken car engine connecting rod bearing are lack of car oil or no car oil, the engine crankshaft will suddenly report dead when the car engine is running so that the car engine can be immediately judged to be pulled; when the engine has car oil, the car engine After a long time, if the car engine is running, there will be a rattling sound of the car engine, and this noise will go with the sound of the oil, and the bigger the accelerator pedal, the louder it will be.   Symptoms of car engine Lava: the lack of lubricating car oil is more serious when the car engine is running; it is found that the car oil used in the car engine is moldy and cannot provide lubrication; the oil pressure is low or there is no oil pressure The car engine still runs; in the crankcase of the car engine Aluminum alloy powder with blocks was found in the engine oil of the ventilated engine; there was abnormal noise w
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Analysis Scheme of Common Fault Causes of Excavators

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  Why is it difficult to start the excavator in winter? It is not only determined by its technical conditions but also affected by the outside temperature. It is more difficult to start at a low temperature in winter, mainly due to the following reasons:   (1) In winter, the climate is cold, the ambient temperature is low, the viscosity of the oil increases, and the frictional resistance of various moving parts increases, which reduces the starting speed and makes it difficult to start.   (2) The capacity of the battery decreases as the temperature drops, which further reduces the starting speed.   (3) Due to the reduction of the starting speed, the leakage of compressed air increases, and the heat dissipation of the cylinder wall increases, which greatly reduces the temperature and pressure of the air at the end of compression, which increases the delay period of diesel ignition, and even cannot be burned in severe cases.   (4) The viscosity of diesel oil at low-temperature increases,
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What Should Hydraulic Excavators Pay Attention to in Special Occasions?

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 Generally, the failure rate of hydraulic equipment is relatively high in the initial stage of use due to reasons such as design, manufacture, transportation, installation, and debugging. In the later period of equipment use, the failures gradually increase due to wear, corrosion, aging fatigue, etc. during long-term use. Only in the middle period of use, do equipment failures tend to be random and relatively stable, that is, the effective working life of the equipment. However, if it is used improperly or the potential faults are not diagnosed and eliminated in time, even in the valid life period, sudden serious faults cannot be ruled out. Therefore, it is the premise of correct and timely elimination of various faults to carefully study and summarize the faults and diagnosis techniques of each equipment. If you need to replace excavator accessories, please go to LandTopMall to purchase, we will provide you with the most professional answers and high-quality products.     What Mainte
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