What are the disadvantages of Sumitomo excavators? The Sumitomo excavator walks fast but sets force

Sumitomo excavator is selling technology, its speed is faster than Komatsu, Carter, etc., but the fuel consumption is very small, and the strength is quite large! I feel that Sumitomo is very easy to use, and the original is ** expensive! One point is that the EFI engine has high requirements for diesel, and it must use Sinopec or PetroChina.

I also bought a Sumitomo 210-5 excavator in September, with less than 100 hours, the small arm appeared bent and deformed, the top of the hydraulic tank cover oil, "the after-sales service staff said that there was no air hole when designed, so the oil will come up", the oil pipe interface of different degrees of oil leakage, at that time the company's after-sales service staff together with the manufacturer came over. After negotiation, it was agreed to replace the machine. Due to my loss of confidence in domestic machines, I increased the purchase price of 100,000 yuan and replaced a so-called original imported Sumitomo 210-5 excavator.

In October, the machine worked for less than 50 hours and found that the rotary pump sprayed a large amount of gear oil from the dipstick, "the explanation given by the after-sales service staff is that because there is no design ventilation hole when leaving the factory, it will come up with oil, saying that because the manufacturer has added more gear oil when leaving the factory, as long as it leaks to a certain extent, it will not be sprayed out again, and now it is a normal phenomenon, so I can rest assured that it is used" Note: This machine also has the problem of a large amount of oil from the hydraulic tank cap. Different degrees of oil seepage at the tubing interface are "normal phenomena after sale".

In November, the first maintenance was done, and the after-sales service staff said that two barrels of engine oil should be replaced, the oil filter, the diesel filter, the gear oil of the walking pump, and the gear oil of the rotary pump. A total of 2,500 yuan was spent on maintenance. After maintenance, I found that the turntable gap was getting bigger and bigger by 400 hours.

The turntable brakes failed. When I checked the dipstick of the rotary pump, I found that the dipstick could not detect a drop of oil. Two days later, the after-sales service came with the manufacturer's people.

The engineer of after-sales service first got on the car to test the turntable brake, and after a lap of letting go, the excavator continued to rotate for 5 meters before stopping. Stopped and still swayed from side to side, swaying. The Engineer's expression in the cab was shaking his head.

But the people from the manufacturer are telling me that the machine is normal. No problem. After that, I asked him to test the turntable clearance, and he didn't measure it and said it was normal.

He took out a list of mechanical test range values, which stated that the standard range value of the turntable clearance was in the range of plus or minus 64mm. He took a ruler to measure the gap value of the machine's turntable as plus or minus 150mmIt is clear that it is outside the range of standard values.

But he told me. We all think that everything is fine with the machine.

Follow-up: the machine 400 hours found that the rotary pump lacked oil after adding a liter of oil, now the machine 700 hours and the dipstick can not detect the phenomenon of oil, now the after-sales service personnel are explained like this, "the rotary pump will lose gear oil for normal consumption, does not affect the work, whenever the rotary pump is found not enough oil to add" I made a rough calculation of my Sumitomo 210 excavator, about 300 hours, about 1 liter of gear oil will be consumed. I am angry at their attitude towards after-sales service and disappointed with Sumitomo Excavator.

Dear, I am glad to answer for you: Sumitomo excavator walks fast but sets force Answer: Excavation weakness is one of the typical faults of excavators.

For the excavation powerlessness can be divided into two situations: one is the digging weakness, the engine does not hold the car, and the load is very light; The second is digging weakness, when the boom or stick extends to the end, the engine is seriously suffocated, or even stalled. The digging is weak, but the engine does not hold the car.

The large and small of the digging force is determined by the output pressure of the main pump, and whether the engine holds the car depends on the relationship between the absorbed torque of the oil pump and the output torque of the engine. The engine does not hold the car, which means that the oil pump absorbs the orange torque and the engine load is light. If there is no obvious abnormality in the working speed of the excavator, the maximum output pressure of the main pump, that is, the system overflow pressure, should be checked.

If the measured value of the overflow pressure is lower than the specified value, it indicates that the overload relief valve setting value of the hydraulic circuit of the mechanism is incorrect, resulting in premature overflow of the mechanism, and the worker is powerless. The machine can be adjusted by turning the adjustment screws. The excavation is weak, and the engine is holding the car.

The engine is holding the car, indicating that the absorbed torque of the oil pump is greater than the engine output torque, resulting in overload of the engine. In the case of such a fault, the engine speed sensing system should first be checked for normality, similar to the engine inspection method described above. After the above detailed inspection and troubleshooting, the engine speed sensing system will return to normal function, the engine suffocation phenomenon will disappear, and the excavation force will return to normal.

Sumitomo excavator walks fast but sets the force you are good, 1, first check the engine working state, the engine speed does not lose speed, very stable. 2. Secondly, check why the hydraulic oil temperature rises quickly, the engineer checked it from the peripheral factors, the heat insulation cotton and the hydraulic oil radiator are good, and the fan belt is also normal. By observing the amount of oil in Huizhaohuai, it was concluded that there was no problem with the return balance fiber oil check valve, and it was inferred that there might be oil leakage from these.

3. Check the pressure of the hydraulic system and the overflow pressure in the working state when the pressure is normal, 320kg C, and when the P1 pump is abnormal, it is only about 100kg C when the P1 pump is abnormal, and the pilot pressure is 35kg C. 4. Check the negative feedback pressure, the pressure value of the EPPR valve (electromagnetic proportional pressure reducing valve) is within the normal range, indicating that the main pump variable is normal, and the two oil ports of the main pump are swapped, and the fault is still the same, and the main pump problem is eliminated. Hope it helps.

It's an excellent excavator with a high technology content, and Sumitomo shouldn't let you down with the wide front cover.

Other excavators don't dare to say haha.

Sumitomo: Sumitomo excavator is good, the technology content is very high, fuel economy, safety, power, handling, reliability, comfort, are above other brands, Sumitomo's electronic control is first-class, is other excavators can not be compared.

Hitachi: Hitachi is also Japanese, but it is not good than Sumitomo, oil leaks everywhere (fried Hitachi), my friend has a 240, I heard him say that it is not good, today is not ruined, tomorrow will be ruined, now it is a loss to buy, only to buy 1 year. Hitachi ZX models have a problem of high engine temperature, which has been difficult to solve, please pay attention.

Komatsu: Komatsu is very well-known, but the generation is not as good as the generation, and the response is not good.

Carter: Oil Tiger, strong, like Komatsu, the quality of the new model is not up to par.

Kobelco: Fuel-efficient, Japanese, not good at walking, no energy, you will be trapped when you do water conservancy work. The engine is more miscellaneous, Isuzu, Mitsubishi, Hino, in what you said, I recommend you Sumitomo.

A lot of people don't know Sumitomo, they all follow the trend, he buys Sany, they all buy Sany, it's a pity, it's easy to dig, no one knows.

I think it's all good, domestic XCMG, Lingong, and Sany imported preparations are good.

I think Hitachi is good, and we load Hitachi and Komatsu together on the construction site, and we load 3 or 4 more trucks a day than Komatsu.

Hello, dear. We're happy to answer your <>

Sumitomo excavator models are purely imported: 1, SH480LHD-5: Sumitomo excavator flagship model, weighing 48 tons, using Sumitomo Fengqing's unique oil-electric hybrid system, with fuel-saving, environmental protection and other advantages of lack of sales.

2. SH330LC-5: This model is a medium-sized excavator with a weight of 33 tons, and adopts Sumitomo's unique high-efficiency hydraulic system, which has the advantages of high efficiency and volt-saving base travel energy. s3、h210-5：

This model is a medium-sized excavator weighing 21 tons, and it uses Sumitomo's unique fuel economy technology, which is highly efficient and environmentally friendly. <>