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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,...

  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 elemen...

 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 Accord...

 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 o...

  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 no...

 The thrust plate structure of the engine is in the form of a semi-circular sheet. The two sides are made of different materials, and one side is made of steel, which is harder. The other side is made of aluminum-based bearing alloy material, which is relatively soft and is in contact with the crankshaft. When the engine is running, it slides relative to the crankshaft. To reduce friction, there is an oil groove on one side of the bearing alloy. Correctly installing the thrust plate will help the engine run better, but if the thrust plate is installed backward, the service life of the engine will be lost. LandTopMall is a mall with 8 years of spare parts sales experience. We have professional spare parts experts and highly acclaimed high-quality products. Welcome to buying engine spare parts such as thrust plates.     How to Install the Engine Thrust Plate? 1. There are two crankshaft thrust plates, which are only installed on the front and rear thrust surfaces of the ma...

  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 lo...

 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.   ...

 The oil cylinder is one of the most important parts of the excavator. The improper operation will damage the function of the oil cylinder. Next, the editor of LandTopMall will introduce to you what are the misunderstandings of the oil cylinder damage operation? Correctly mastering the operation method of the oil cylinder can save you more money and prolong the life of the excavator. However, if the cylinder of your excavator has been damaged and you need to replace such spare parts, you can contact LandTopMall's spare parts experts for consultation and purchase.     1. The working device is not fully recovered before walking If the working device is not fully retracted, the bucket will easily hit the rock, and the cylinder piston will generate a large load, which will cause internal damage to the cylinder and the cracking around the pin shaft. 2. Digging with walking force Hydraulic oil is easily emulsified and deteriorated after being mixed with water, and entering the ...

 Every day we make our own life special and meaningful. Every company's products must be very valuable for that customer. LandTopMall is such a company, then we will take a look at the anti-rust treatment of excavator accessories. . We should also pay attention when storing excavator accessories, you can choose to dry them indoors. For accessories that must be placed outdoors, they should be placed on flat ground and covered with wooden boards, and then covered with a cover cloth. Before these excavator accessories are stored, it should be determined whether to use the method of repainting or the method of repainting the whole machine according to the size of the peeling area of ​​the anti-rust paint on the outer surface. If it is other working device accessories on the excavator, such as the screed of the paver, the bucket of the loader, the scraper of the grader, etc., the rust prevention method for the exposed metal parts is to apply butter. Excavator accessories generally refer...

 The turbocharger uses the exhaust gas discharged from the engine to drive the turbine. No matter how advanced it is, it is still a set of mechanical devices. Because its working environment often works at high speed and high temperature, the temperature of the turbocharger exhaust gas turbine end is above 600 degrees, and the turbocharger is supercharged. The speed of the supercharger is also very high, so to ensure the normal operation of the supercharger, it is very important to use and maintain it correctly.   Under low-temperature conditions, the increase of fuel viscosity is not conducive to the atomization and combustion of fuel, the poor fluidity of lubricating oil increases the resistance of various moving parts, coupled with the influence of factors such as the reduction of battery working capacity, it is easy to cause difficulty in starting the engine, Parts wear, power decreases, fuel consumption increases and power performance decreases. To ensure that all kinds o...

 Excavator is a huge consumer product. In addition to daily fuel consumption, its functional parts are constantly worn out. After a period of use, it needs to be repaired or even replaced. Therefore, for construction machinery practitioners, accessories are not unfamiliar, but like a common condiment. But for beginners, parts classification and authenticity identification still need to learn more: if the replacement is not timely, it will affect the performance of the excavator; in addition, the parts market is deep and uneven. Next, let's introduce the purchase of excavators Notes on accessories!     When purchasing excavator accessories, you should choose according to the model of the excavator. Because different types of excavators use different accessories, you can only buy the appropriate excavator accessories if you clarify the model of the excavator accessories. If you do not know the specific model or accessories of the excavator, bring the original parts for refe...

 What are olecranon scissors? How to maintain the olecranon shears? Next, I will briefly introduce it to you. The olecranon shears are heavy-duty hydraulic shears, large cylinders, mounted on excavators for dismantling scraps such as scrap trucks, shears, steel, tanks, pipes, etc. These shears can be used in different work scenarios, including the dismantling of workshops, recycling of waste materials, etc., and can cut iron materials. Unique design and innovation guarantee olecranon shears for steel, cans, tubes, etc. The machine has high efficiency and strong cutting force, and its performance is more than 15% compared with ordinary hydraulic shearing machines. It is one of the larger shear forces in the hydraulic shearing of excavators.     The olecranon scissors can be used to cut waste materials. It can also be applied to the recycling of scrap metal materials, the recycling, and reuse of scrap steel, the dismantling of scrapped automobiles, etc. Realize 360-degree h...

 When the parts of the excavator fail, it will affect the excavator's inability to work smoothly, so it is necessary to replace the parts of the excavator in time, but because the progress of the project is often in a hurry, there may not be enough time. Let everyone choose the excavator accessories carefully, so some friends just take one and replace it when choosing accessories. It is necessary to know that if the excavator accessories are not matched, it will cause serious damage to the excavator.     the Model Does Not Match In the maintenance process, the phenomenon of substituting or misusing excavator parts is still very common. Emergency substitution of some parts is feasible, but long-term use is harmful and unhelpful, which has a great impact on the safety and technical performance of the excavator. If the parts suitable for Yanmar gc950 engine are applied to the parts suitable for Komatsu 4d94le engine, there will be serious adverse consequences. Some mainten...

 A car is an important personal investment, but owning one, whether new or used, takes a lot of effort. It must be well cared for to ensure its reliability and prevent malfunctions. Used cars, in particular, need special attention as they are harder to maintain and more expensive than new cars. Following a regular maintenance routine will help extend the life of your car and keep your car performing at its best. It can also save you a lot of repair costs. But when you need to buy accessories but don't know how to choose, you can contact LandTopMall's accessories experts to help you. We not only provide accessories for Kubota v2607-t engine but also various engine accessories for Yanmar Yanmar b55w engine, etc. Here are 10 tips for car care: maintain the car Drive Carefully Do not accelerate the engine during start-up as this will rapidly increase the wear on the car's engine. Accelerate slowly when you start driving. Shift into neutral at a red light to give the engine tim...

 I believe that most car owners take good care of their cars, and they know very well that it is better to maintain a car than to maintain a car. along with The increase in service life, mileage, and unavoidable accidents will eventually lead to a complete diagnosis and repair of the car. So how much do you know about auto overhaul? Under what circumstances does the download need to be overhauled? What is a Car Overhaul? The so-called car overhaul refers to the restoration repair that completely or nearly completely restores the technical performance of the vehicle by repairing or replacing auto parts after a certain mileage or time of driving a new car or an overhauled car. collective name. Under What Circumstances Does the Car Need to Be Overhauled? When the mileage of the car is close to the overhaul period, a technical appraisal should be carried out to assess whether the car needs an overhaul. If it is believed that the car can still be used, the mileage for continued driving ...

 Solenoid valves are the basic components of automation used to control fluids and belong to actuators: not limited to hydraulics and pneumatics. To control the direction of hydraulic flow, the mechanical devices of the factory are generally controlled by hydraulic steel, so solenoid valves are used. The working principle of the solenoid valve: there is a closed cavity in the solenoid valve, and there are through holes in different positions. Each hole leads to a different oil pipe. There is a valve in the middle of the cavity, and two electromagnets on both sides. When the valve body is energized, it will be attracted to which side. The valve blocks or leaks different oil discharge holes by controlling the movement of the valve body, and the oil inlet hole is normally open, and the hydraulic oil will enter different oil discharge pipes, and then The piston of the oil is pushed by the pressure of the oil, the piston drives the piston rod, and the piston rod drives the mechanical de...