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Beware of fraud: teach you identify second-hand small tips

Creation:Hooray Source:Hooray Machinery Release Time:2016-12-21 19:43

Abstract:For some of the money is not very bounteous users buy secondhand small digging undoubtedly less pressure, the threshold is low, easy to implement entrepreneurial dream, so is also a good choice. But it is important to note that a large number of imported
For some of the money is not very bounteous users buy secondhand small digging undoubtedly less pressure, the threshold is low, easy to implement entrepreneurial dream, so is also a good choice. But it is important to note that a large number of imported second-hand excavators in China, domestic circulation of second-hand excavator, the staggering number, and the appearance of a lot of second-hand equipment through simple processing is difficult to identify advantages and disadvantages, so when the user want to buy a secondhand small digging, must be measured in many ways, to avoid fall for it.

1. About the bucket and movable arm

Excavator is not always used for digging, and sometimes also used for piling or pipelines. Therefore, the user needs to pay attention to the bucket, ensure piling, crushing and walking device: no problem. There is an important part of bucket hydraulic cylinder connecting pin shaft and bushing, be sure to inspection on the elastic in these places. When the user to start the machine after the mobile bucket, the bucket rod and arm, may see the pin or the movement of the oil cylinder, but the bucket rod and bucket, this is because the pin shaft and bushing part came loose. Another key point to take a closer look at the big arm connected to the excavator parts, if excessive large arm at the bottom of the joint wear, the value of the whole device could lead to a loss.

2. The oil means that may be the whole oil pollution

Check the hydraulic oil cylinder and the tubing is very important. Hydraulic oil cylinder is the best situation no scratches, dents, or chrome plated surface traces of the spill. If you have hydraulic oil leakage, may be dust has polluted the hydraulic system. Also want to confirm that the cylinder wall are not damaged or a dent. The gaps between the cylinder and the cylinder wall is small, as long as there is sundry, the pipe will cause in the operation of the oil cylinder in due to wear and produce a large number of scrap metal, and remain in the hydraulic system.

3. Guard against car body welding

Take a closer look at excavators have crack and traces of welding, when the original make these things of the machines have been used by excessive. There is also a good method, is to use a straight on the arm and the position of the arm after, to see if there is any mismatch or distorted. It is important to pay special attention to the extra plate repair. Machine if there are too many patches may mean that the equipment has been used for a long time.

4. Pay attention to the rubber tracks and chassis

When many users don't like check steel tracks, a close inspection of rubber tracks wear. Easy to ignore the sprocket and roller a lot of wear and tear. Users can check the abrasion of the cracks on the rubber tracks and edge to estimate its usage, like watching tires note tire grain. When users check the crawler and chassis, don't forget to check the oil level and cleanliness. This part is easily neglected, if the oil amount was low, and there is water or other things into, it will produce a bigger trouble.

5. Start to operate after checking

After engine preheating start-up, tilt the machine just stand on one side of the track, rotation on both sides of the track in order to stand up. Note that in how many times can be finished within 30 s or 60 s such action, and then were compared with the other tracks. Excavator crawler walking device is a built-in flow meter, if they don't have the same flow rate, there is a problem. The other is a way of testing on flat ground driving excavator operation 10 m, if you're running is linear, the walk on both sides of the device is known as good operation condition. Also check the slewing gear ring and rotary bearings. Under normal circumstances, the upper can be a smooth start turning and can stop accurately, with less or no deviation. For small excavator, the rotary gear ring and slewing bearing should be the same as machine has long life, so any questions about this part have to pay attention to.

6. Open the hood cover inspection

Open the engine cover and check for signs of smoke exhaust pipes. Can pull out the oil dipstick and see if any smoke. Smoking too much often need to replace the piston ring, and may before long will overhaul engine. Check the air filter unit and all the pipe and the pipe clamp. As long as a little dust is enough to destroy the whole engine. Pay attention to the terminal accumulation of dust or dirt, also want to check the fan to ensure whether the tape for the tensioning state, check the radiator make sure its clean, ignore the cooling system and air intake system is likely to cause the engine overheating, so as to shorten the life of the machine. Basic inspection include check radiator fluid and engine oil, and check the degree of corrosion of the battery, and view have obvious leakage around the engine.
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