Xinrui International Trading Co., Ltd

  1: Determine needs and budget First of all, users need to clarify their needs, such as the required load capacity, lifting height, operating speed, etc. of the forklift. At the same time, you also need to determine your own budget range to avoid purchasing poor quality second-hand forklifts due to the blind pursuit of low prices.     2. Choose a reliable second-hand forklift market or dealer Choosing a reliable second-hand forklift market or dealer is an important part of buying a used forklift. It is recommended to choose a market or dealer with a high reputation and a good reputation to ensure that the second-hand forklift you purchase is of reliable quality and has guaranteed after-sales service. 3.According to the vehicle condition ①. First, select the required tonnage and lifting height, as well as the starting method ②. Second, the most important thing when choosing a second-hand forklift is the forklift mast. How to check the quality of the door frame? First, check whether there is desoldering deformation at the connection of the door frame. Look at the flatness. If there is deformation in this area, it cannot be repaired. Finally, check whether the pulleys of the mast are loose. If they are loose, they need to be replaced. ③. If the engine is a fuel type, the engine only needs to check whether there is any exhaust gas. If it is an engine with exhaust gas, its piston rings are stuck and the steel sleeves are worn. ④. Fourth, install the hydraulic system again. How to tell whether the hydraulic system of Youche is good or bad? The first thing is to see if there is any oil leakage. Secondly, you can find something heavy to fork it to see if it releases pressure. If there is pressure relief, this oil seal needs to be replaced.     4. Understand the performance and safety of second-hand forklifts When purchasing a second-hand forklift, you need to understand its performance and safety, such as load capacity, stability, braking performance, etc. At the same time, you also need to understand whether its environmental protection standards meet the requirements of current laws and regulations, and whether it requires FDA certification.

First, appearance. Check to see if there is a painted car, and pay attention to matching the car number, engine number, frame number and bridge number. Under normal circumstances, the numbering dates of each component will not be too long apart, generally no more than three months. If it is longer than that, it is necessary to consider whether it was refurbished and assembled.     The second point is the frame. Carefully check the front and rear frames for cracks, welds, paint repairs, and deformations. If there is, check whether it is an important location, such as the joints of parts, the welding of the frame, etc. If you see any doubtful areas, touch them with your hands. Sometimes cracked areas are polished and repaired. You may not be able to see it with your eyes, but you will definitely feel it when you touch it with your hands. Also, adjust the throttle of the engine equipment to the maximum, lift the bucket, run in a straight line on flat ground, and after applying the brakes, check whether there is vibration and beating at the hinge pin. If the beating is severe, the vehicle may have exerted too much force. How to feel the amount of movement? You can feel the new machine for comparison, so that you have an idea.   The third point is to look at the tires. Loaders that are used in harsh environments for a long time often suffer greater wear and tear, and the wear of the tires will also be very serious. The tires themselves are more expensive, so many people do not replace the tires when they are sold. In this regard, the loss of the rebel loader is relatively accurate through the wear of the tires. When purchasing, if you find that the tires of the loader are seriously worn D 01:32, then everyone must pay more attention. This kind of loader is likely to have greater wear and tear during operation, and you need to do in-depth research on the use of the components. Good judgment. Also, don’t just look at the age of the tires. The new ones may be fully retreaded tires. Look at the brand of the tires and make a note of it before checking. When fully retreading a tire, pay attention to the surroundings of the steel rim. In the gap between the tire and the steel rim, genuine tires are relatively smooth and neat. Retreaded tires are generally not smooth and neat. Half-retreading tires are more visible and obvious. Japanese tires should check whether there are holes in the teeth, whether the size of the holes is patched, etc.   The fourth point is the hydraulic tank. Open the oil filler port and smell if there is a burnt smell. If there is any smell, it means the temperature is relatively high. Use a ruler to put a drop of oil on the white non-reflective paper to see if there is aluminum alloy powder. If there is, it means there is a problem with the turbine. It is normal. The oil should be a clean, slightly red stain.   The fifth point is to check whether the engine appearance is clean, whether there is any oil leakage, and whether it starts sensitively. There should be slight blue smoke when starting the cold cylinder, no blue smoke from the hot engine, slight black smoke from the gas pedal, normal exhaust, and basically no smoke. If there is smoke, it should be white. If there is blue smoke, be careful. Another little experience is to check whether the engine coolant is water or antifreeze. Car owners who add antifreeze take good care of their machinery. If possible, disassemble the air filter to see if the air intake is clean. The air intakes of well-protected machines are very clean. You can also use the sealant to determine whether the engine has been repaired. You need to look carefully or use a light to see this.   The sixth point is to look at the bucket. The bucket is the most severely worn part in the work of a loader, but it is also the most important working device. Therefore, in order to ensure that the loader can be put into good use, everyone must strictly check the wear of the bucket, judge the age of the vehicle, and avoid choosing a loader with poor quality. When selecting, you should look at the thickness of the blade, whether the side plate and bottom plate are deformed, and the thickness.   The seventh point is to look at the water tank. The water tank must be completely cleaned on a car that has been filled with water for three years, otherwise the heat dissipation will be poor. If the water tank is damaged and blocked by scale and is tilted, the water tank will leak as soon as the scale is washed away. Point eight, look at the gearbox. Confirm the problems with gearbox oil and other gear oil pressure to ensure that the gearbox works effectively and avoid some losses in effectiveness and efficiency. In addition, while performing gearbox testing, some testing should also be done on the loader's working pump to avoid serious wear and tear, and to prevent problems such as the loader's possible slow boom lift.   The ninth point is to look at the hydraulic system. To see if the operation is smooth, do a single movement D 04:23 and hold it to death to see if the engine stalls. If there is oil leakage at the connection point of the fuel door pipe at total speed, check the hose of the entire machine. The hose will generally crack in two to three years. If all the hoses on the entire machine are full of cracks, especially those under the cab that are not exposed to wind and sun, you must be careful.

How to choose a truck-mounted crane? 1. It is I-beam. The I-beam depends on its thickness and its wear and tear. Its I-beam has almost no wear, so the I-beam of this car fully meets the standards.   The second thing is the moving part of the cart. It depends on its running wheel. When looking at the running wheel, you need to check whether there is any wear on the inside of it. A wheel like this one, its thickness and including its tread, has almost no use and almost zero wear. Wheels like this one also meet the standards.   The third component is the core component on the vehicle. How to choose an electric hoist? Then look at its gears and the uniformity of its gear thickness. The uniformity of this gear reaches the best standard for second-hand equipment.   Four: Check the appearance of the cab to see if there are any bumps in the cab. Open the door and see if the seams inside are deformed and spray-painted. This will prove whether there are any bumps or impacts.   Five: Check whether the covering parts of the entire vehicle have been replaced. Check to see if there is any oil leakage near these legs, and whether there is oil leakage or welding in these places near the turntable. After a complete circle, the original welding is definitely different from the subsequent welding. Is there any welding underneath? Is there any oil leakage in these multi-way valves?   Six: Is there any oil leakage in the engine bottom case? Is there any reinforcement and welding on the top and bottom of the front frame? The other one is the gearbox. Are there any cracks or problems? Then there is the upper garment. The upper garment depends on these key parts and stress points. Then there are the same stress-bearing points inside. Check whether there are cracks and welds. Check whether there are telescopic oil seals inside the big arm and whether there is any oil leakage.     Tips for choosing a truck crane. When choosing a second-hand crane, look at the year. Second-hand cranes are generally divided into three levels. 1. The first level is cars that are 1-3 years old, with good condition, high depreciation rate, and good value for money. This type of vehicle is suitable for having a fixed live source, and it would be better if the construction site has been contacted. 2. The second type is a car that is 3-7 years old. The advantage is that it is relatively cheap. The disadvantage D00:19 is that the car is outdated and has been repaired. This type of car is suitable as an entry car. 3. The last category is old cars that are more than 7 years old. They are very cheap but have many problems. This type of vehicle is suitable for those who have their own construction sites. After a few years of work, they can directly cut scrap metal.

1：Check the nameplate of second hand exvators to see the year of manufacture of the date, the newer the date the better 2: Check the appearance of the used excavator Carefully observe whether there are traces of spray paint on the door frame and window seals. Any traces of new paint may hide flaws you don't want others to know about; check the frame welding points under the hood on the back of the used excavator and look carefully to see if the used excavator has been in an accident. When choosing a second-hand excavator. The original welding points are smooth and small, while the added welding points are rough and irregular. If the latter welding point appears, it means that the second-hand excavator has had a serious accident. Also check whether the cab is deformed from the side. If it is deformed, it means something has happened to the excavator. 3：The wear level of the track can reflect the frequency of use of a second-hand excavator. If the tracks are flat, observe the level of track wear. The edges have no edges and corners, indicating that the owner of the original second-hand excavator drives the machine more frequently and does not spare any effort. This not only shows that the track itself is in poor condition, but also reveals that there are many hidden problems in the overall condition of the entire second-hand excavator. If the tracks are not original, it means that the vehicle has done a lot of work and the tracks have been replaced. The chain can also show the working condition of the second-hand excavator. 4： ①：First, observe whether the engine and hydraulic pump have any traces of disassembly and repair. If so, pay attention. Observe the color of the exhaust gas. If the exhaust gas is translucent and light gray, observe the appearance and operation of the engine. Check carefully for signs of oil or water leakage outside the engine. Fire the engine. It means that the engine is in good working condition; if it is blue, it means that the engine is very tired; if it is red, it means that the cylinder gasket is about to be scrapped. Check if there are any abnormal noises in the engine and hydraulic system. Open the accelerator to the minimum, jack up the car, and see if there is any strength when the car is on the accelerator. If the car stalls, it means the car has no strength. ②：Rubber tracks and undercarriage As a result, you only see wear on the rubber tracks, but not a lot of wear on the sprockets and supporting wheels. You can estimate the use of rubber tracks by checking for cracks and edge wear, paying attention to the height of the ribs, just like you pay attention to the tire tread when looking at tire wear. ③：Slewing ring gear and slewing bearing Check the slewing ring gear and slewing bearing of the second-hand excavator. Under normal circumstances, the upper part should be able to start turning smoothly and stop accurately, with only a small amount or no deviation. For a small excavator, its slewing ring gear and slewing bearing should have as long a life as the machine, so any problems in this part must be paid attention to. While you're inspecting the tracks and undercarriage, don't forget to drive the vehicle again to check the oil level and cleanliness. This part is easily overlooked and usually very little oil is left. If the oil level is already low and water or something gets in, it will cause even greater trouble. ④：Engine hood Because of different soil conditions and usage methods, the working life of rubber tracks also varies greatly. Generally speaking, its average life is about 2000 hours. Then, if you work in an environment with rocks or easy to wear, the service life will be halved; conversely, in a better environment, the operating life will be doubled accordingly. The rubber tracks on small excavators are different from the steel tracks on larger machines and are suitable for use on grass and driveways. Most of the time you don't inspect rubber tracks for wear as closely as you do steel tracks. Key inspections also include checking the corrosion level of the battery, checking the radiator fluid and engine oil, and checking for obvious leaks around the engine.