How to buy second-hand construction machinery to buy value for money?

      The rise of the secondary construction machinery market is the desire to buy second-hand equipment. Buy second-hand construction machinery, small investment, small risk. But compared with the new machine, second-hand equipment without perfect customer service service system, at any time may fail, even if it is to get the most timely service, it may not like the new machine that is complete, easy to affect the construction schedule, and the service is paid. So how do we know if the used products are worth the money?

How to buy second-hand construction machinery to buy value for money?

Foreign second-hand construction machinery has a very complete evaluation criteria, and its sales are mostly auction based. This assessment capability is not available to most of the secondary construction machinery users. As for the direct users, it is very important to use the most simple method to evaluate the used construction machinery in our country when there is no perfect equipment evaluation standard.

Generally speaking, the excavator in South China has a higher level of acceptance to the second-hand excavators than the northern ones. Here gives a simple second-hand construction machinery evaluation method for reference, the specific method is to second-hand equipment price is divided into basic price and adjustment price.

1., how to determine the basic price?

The basic price is determined by the machine's use time.

In China, the service life of engineering machinery is generally designed for 10 years (in general, due to the launch of new products, the use of a 10 year old machine are also available even in very low price), year average time was about 2000 H. In normal use, the engine overhaul period is 10000 ~ 15000 h, the hydraulic pump life are in more than 20000 h, while others such as hydraulic motor, gear box, main control valve assembly parts life longer, that is to say for the new machine, in the absence of accidental within 5 years without overhaul. Excavator as an example, according to the current commonly used standard mechanical equipment depreciation, the depreciation by 20% in the first year after the annual decline of 5% to calculate the basic price, namely the first year depreciation of 20%, second years of depreciation of 15%, third years of depreciation of 10%, fourth years of depreciation of 5%. Fifth years later, often due to aging, some parts of the normal wear and some unexpected reasons, the instrument must be a series of renovations, which makes the depreciation rate stable at around 5% or less, so that price steadily. With the upgrading of the technology and the overall aging of the machine itself, the price dropped to less than 20% of the machine price after 10 years.

What we should pay attention to is the reliability of the equipment running timer. For the calculation of reliable operation timer equipment at 2000 per year for H, not too reliable timers in estimating the average annual working time should be adjusted accordingly (also possible equipment use time far more than 2000 h per year, this is another matter).

2., how to determine the adjustment price?

When the basic price of the equipment is determined, it is necessary to adjust the price according to the specific conditions of the second-hand equipment you have seen. Take excavator for example, the adjustment price should be the sum of the following items.

- easy starting of engine, no exhaust, smoke exhaust normal, low, medium and high speed sound evenly;

No oil leakage, no test temperature, no abnormal appearance.

- there is no abnormal appearance of the slewing system; the clearance of the bearing is small;

- lift the arm out of the ground, push the big arm with your hands, and swing its left and right.

- work device, big, small arm bucket, no abnormal, cracking, variant, two times processing, etc..

- walking part of the four wheel area, wear normal, no cracking, no deformation of the track plate.

- hydraulic parts, the normal appearance of the cylinder, no oil leakage, no drop; the piston rod without pulling, peeling, bending. When turning, the turning motor is easy to start, the parking drift is small, there is no abnormal sound in the rotation, no oil leakage. Walking motor in the engine at the same speed, idling speed is the same on both sides of the track, walking strong non hunting, high speed and low speed transformation is obvious, no abnormal noise, the common land in situ U-turn easily, no leakage. The hydraulic pump has no oil leakage, no abnormal sound, and has the condition of normal walking.

- - the use of engines for used excavators is the focus of inspection

- the hydraulic system of the second-hand excavator is also the focus of the investigation

- electrical parts, electrical appliances, meters and other functions. Each tank and radiator are free of deformation, oil leakage and water leakage.

- the cab is intact. The cover, cover, guard board and frame are free of deformation and cracking.

When the above inspection results are normal, the equipment adjustment price is zero. For the problematic part, the adjustment price shall be the cost price for the restoration of the normal function of the part. The total adjustment price is the sum of the adjusted prices of each part - the final price of the equipment = the basic price - the adjusted price

In addition, if the assembly of second-hand machinery equipment, large or some parts have been changed, users can according to their own degree of recognition of this change, and then the price corresponding increase or decrease. In the concrete implementation process, the different user and the area to model's likes and dislikes are not the same, this also can have the certain influence to the price appraisal.

It is still difficult to make an accurate assessment of the prices of used construction machinery. Different people will give different prices for the same equipment, sometimes even as high as 10%. Therefore, it is necessary for a private user to purchase an expert at the time of purchase, as a guide, and to make a survey of the equipment, and make constructive suggestions.

Therefore, the purchase of second-hand construction machinery, it is necessary to be careful and careful, "buy comfort, rest assured" is the real value for money!