A Sumitomo's whole car is powerless. Today, I would like to share with you how we can quickly find the fault point and accurately solve it when the machine encounters the whole car's powerless action?
Fault phenomenon
An excavator with weak movement of the whole vehicle. This Sumitomo 240 is a second mobile phone bought by the boss. According to the former owner, the maintenance of the machine is particularly up to standard, and there has been no major failure before
However, recently, the machine has a problem of weakness of the whole vehicle, especially when working on excavators and walking. The owner of the machine is angry but has no choice but to contact the maintenance master immediately for maintenance
Comprehensive analysis of failure points of Sumitomo 240
The weakness of the whole vehicle seems to be a relatively clear fault phenomenon, but it is definitely a difficult problem, because the fault point is hidden and complicated. Let's take a look at what causes this fault phenomenon
Fault cause
1. The weak action of the whole vehicle generally needs to be checked from the oil circuit. The simplest and most common failure point is the failure of the diesel pump and fuel injection nozzle, so we can give priority to adjusting the pump and focusing on checking the fuel injection nozzle to determine the inducement
2. If the fuel injection nozzle and the diesel pump have been adjusted, and it can be determined that there is no fault in these two components, then it is necessary to check and adjust the pressure of the hydraulic system. Adjusting the pressure is not an easy thing, and it is recommended to do it under the guidance of the maintenance master!
3. Next, we will focus our inspection on the turbocharger, and we need to focus on checking whether the turbocharger is abnormally damaged
4. Along with the engine system, we also need to check whether there are cracks and leakage points in the engine intake pipe, because insufficient intake air will also lead to weak action of the whole vehicle. If there is any abnormality, the owner of the engine should not worry about money and replace the intake pipe immediately
5. In addition, we should also focus on observing whether the excavator is accompanied by concurrent failures such as engine oil burning or large exhaust when the whole vehicle is weak. If so, focus on repairing the engine!
6. Of course, the wear of cylinder and piston ring also needs our attention! Especially for old-age machines or machines that have changed relevant accessories before, we need to pay more attention
7. Speaking of this, we should not ignore the most obvious cause of failure, that is, whether the injected diesel has quality assurance? Does it contain water and other impurities? Has the air filter element been replaced for a long time? Especially under the working condition of especially serious dust and sand, the inspection and replacement of air filter must be carried out in place
8. Abnormal problems of the power system will also lead to the weakness of the whole vehicle, such as the blockage of the common oil pipeline and the abnormality of the oil pump
9. During maintenance, we can accurately measure whether the system pressure is normal, including whether the main pressure and pilot pressure are abnormal, with the help of precision instruments and equipment
10. The reasons of oil 名媛直播 can not be ignored, such as whether the oil quantity of engine oil and hydraulic oil is sufficient and whether the oil 名媛直播 are clean
11. More complex reasons are the problems of the hydraulic system itself, such as focusing on checking whether the hydraulic pump has leakage and other abnormalities
12. Finally, we also need to eliminate whether the eppr valve of the main pump has failed. We need to test the pressure. If the pressure remains high, it is the problem of the eppr valve. If it is confirmed to be the problem of the eppr valve, we can solve the problem by replacing it directly
to make a long story short
In summary, the failure of the whole excavator with weak action is a complex problem, so the maintenance steps are cumbersome and complex. You can find the cause of the failure one by one according to the above reason analysis, strive to find the cause of the failure as quickly as possible, and save downtime
