1 certificate
This step is not in the car, but it is the foundation of a used car. This is the first to look at used car documents, if you buy a black car, even if the car is perfect, what is the use to buy? See the documents can now be checked on the official website of the police. In addition, the vehicle license involves two important numbers: the body number and the engine number. It must be completely consistent. The body numbers of different brand cars are different, but they are not difficult to find; the engine number will be a little more troublesome, and sometimes a professional master is required. However, these efforts cannot be saved. This is the key!
　　 2 appearance
As the average person thinks, looking at the appearance is to see if the car has scratches and there are no depressions. The average person likes to walk around the car for a week, and each detailed part is not let off. This is correct. But professional chefs like the 45-degree observation method. It is to stand at the front and rear of the car, a total of 4 positions, and to observe the appearance of the car at an angle of 45 degrees. This observation not only makes it easier to see if the car has scratches, but also finds hidden depressions that are not visible when looking directly. When light is abundant, such observations are quick and effective.
　　 3 switch
After getting into the car, start the car and turn on all the switches, including the headlights, interior lights, air conditioners, stereos, door switches, and even a small locker in the car. After the switch in the car is inspected, turn off the engine, and then turn the car key to the second gear. At this time, you can find that the instrument cabin contains airbag lights, door lights, battery lights and ABS lights, seat belt lights, etc. All lights are normal. After seeing that all the lights are on, the engine is started again. At this time, all the lights should be off. The airbag light will automatically extinguish for a short period of time while the door light turns off in four doors. When it is turned off, the seat belt light goes out when the seat belt is fastened.
　　 4 gears
Regardless of the automatic transmission, manual transmission, check the gear is an important step to see the used car, check the attention to the engine start state check, but also to foot on the brake, do not put down the handbrake. Every shift, you can feel a slight setback in the car, which is normal. However, when shifting, the frustration of a certain number of gears is fierce, and there is a problem. Of course, if the owner of the car allowed it to open, his experience would be deeper.
　　 5 airbags
Checking the airbag is a key step in checking whether the car has been overhauled. In addition to the safety sac light when the engine is started, it must be lighted for a short time before it goes out. The first is to clarify the position of the airbag: The mainstream dual-balloon position on the market, the airbag on the driver's position is on the steering wheel, which is the position of the push horn; the airbag on the front seat is on the seat, and a rectangular mark with a clear border is. The best thing to look for is the airbag of the steering wheel. In general, if the airbag has not exploded, the color, the oldness and the oldness are consistent with the steering wheel, because changing the airbag will not change the steering wheel.
　　 6 Engine
After the car is inspected, before turning it off, open the front cover switch inside the car. Because the next step is to check the engine, keep the engine starting. The engine needs to be checked with a very professional instrument, but we also have our own skills. Not watching, but listening. In general, the sound of the engine is smooth and low, and a good car has a cold start in the engine for a while. The sound of the engine in the stationary state of the car is getting smaller and smaller. This is a normal situation. If the engine is loud and there are sharp, irregular noises, this is a problem.
　　 7 skeleton bits
Why do you want to look at the keel? Because the exterior of the car is draping and even hitting the dents, it is very difficult to see it after repainting. However, the keel is different. In the absence of a car accident, the keel has depressions and offsets. At this point, looking at the integrity of the skeleton itself and the interface with the car, it is very clear that the accident record of the car.
Main control valve is an important hydraulic parts for an Excavator. It controls the action of the excavator.
The control valve function as follow:
(1) double pump confluent oil supply and increase the speed of moving arm. (only when the arm is raised)
(2) when the bucket is operated separately, double pump stations supply oil to speed up the action speed of the bucket rod.
(3) the motion of the arm is given priority, and the movement of the arm will be given priority when the arm is carried out at the same time as other movements.
(4) rotary priority, rotary and bucket at the same time, rotation will be a priority.
(5) negative flow control, give the main pump a negative flow signal, so that the stem in the middle, the main pump displacement to the minimum.
(6) walking in a straight line, when the excavator moves forward or backward, other actions can be done at the same time, in order to ensure the needs of special working conditions.
(7) the electric sensor can be configured to meet the needs of electronic control.
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DAEWOO/DOOSAN |
DH50-7, DH55D, DH60-7, DH80, DH130, DH150, DH150W-9, DH215-5, DH200-5, DH150LC-7, DH215-7, DH220-5, DH220-7, DH220-9, DH220-10, DH225-9, DH258, DH258LC-7, DH280, DH290B, DH300-5, DH300-7, DH320, DH360, DH370, DH500, DX300 |
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HYUNDAI |
R60-7, R80, R130, R140, R150-7, R150-9, R1107-7, R160-7, R210, R220, R220-7, R215-7, R220-5, R225-7, R225-9T, R225lc-7, R290, R350-7,R110-9, R215-9, R275LC-9, R305, R305-7, R320, R335-7,R360, R370, R375, R375-7H, R455, R460, R485-7 |
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VOLVO |
EC130, EC140B, EC210B, EC210C, EC235C, EC240B, EC290, EC290B, EC290C, EC360B, EC460B, EC460C, EC480D |
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CAT |
E305, E320, E325C, E315C, E330C, E315D, E320D, E325D, E330D, E360D, E70B, E120B, E200B, E320B, E330B |
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KOMATSU |
PC35,PC40,PC45, PC50, PC55, PC60,PC60-6, PC70, PC75, PC78, PC80, PC90, PC100, PC110, PC120, PC120-7,PC130, PC150, PC160, PC180, PC200,PC200-6, PC200-7,PC200-8, PC210-8,PC220-6,PC220-7,PC210, PC220, PC230, PC240,PC240-8, PC270, PC300, PC360,PC360-7, PC350, PC400, PC450, PC650, PC750, PC1250,D31, D50,D65, D85, D155, D275, D375, D475 |
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HITACHI |
EX200-2, EX220-2, EX120-5, EX200-5, EX220-5, EX400-5, ZAXIS200-3, ZAXIS210-3, ZAXIS240-3, ZAXIS 270-3, ZAXIS330-3, ZAXIS360-3, ZAXIS110, ZAXIS120, ZX200-6 |
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KOBELCO |
SK200-3, SK200-5, SK135rs, SK70rs,SK60,SK120-5, SK200-8, SK250-8, SK260-8, SK130-8, SK200-6e, SK210-6e, SK160 |
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KATO |
HD80R, HD820-5, HD1023, HD1430, HD700-7,HD1430-7, HD1250-7, HD450-7 |
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SUMITOMO |
SH120A2/A3,SH130, SH200A2/A3, SH210A5, SH240A3, SH360A5 |
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KUBOTA |
KX155, KX135, KX161-3 |
Excavator Main Valve,Pc160-7 Excavator Main Valve,Pc200-7 Main Control Valves,Excavator Main Relief Valve
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