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There are many types of faults in the excavator engine. I have explained the problems of abnormal noise, oil burning, carbon deposition, etc. before. What happened to the engine speed drop when the excavator was working? How should we solve it?
The engine speed drop refers to the failure of the engine speed drop during the excavator operation. The performance of the speed drop is divided into two types, one is a slight speed drop within 200 rpm, and the other is a serious speed drop over 300 rpm. It is very likely to cause the excavator to suddenly turn off. The main reasons for the engine speed drop of the excavator are the following 8 points.
All Part Numbers Kobleco Engine Parts For Excavators
| Name | All Part Numbers Kobleco Engine Parts For Excavators |
| Product Number | All Part Numbers You Need |
| Condition | Original Brand New |
| MOQ | 1 Piece |
| Payment | T/T, Western Union, Paypal, etc |
| Standard or Nonstandard | Standard |
| Delivery Time | In 3 Days |
| Packing | Wooden Box |
| Warranty | 6 Months |
| Transport | By sea/air/express (DHL/FEDEX/TNT/UPS/EMS/City-line) |
1. It is caused by the failure of the diesel oil circuit of the excavator. Generally speaking, when the diesel oil circuit is blocked, it may cause the speed drop phenomenon.
2. The hydraulic system of the excavator is faulty, so that the hydraulic pump cannot change the displacement normally, causing the system pressure to be too high, and the speed may drop and the machine may fail.
3. The output power of the excavator engine itself is insufficient, the output power is lower than the rated power, and the speed is too low. There is also a problem with the main pump.
4. The quality of the fuel used by the engine is too poor or the water content of the fuel is too high, which will lead to insufficient power of the engine and cause the phenomenon of speed drop.
5. When the air intake system leaks or is blocked, it will cause insufficient air supply to the engine, resulting in insufficient fuel combustion, and there will be speed drop and black smoke failures.
6. Because the solenoid valve clearance is too large, the oil supply is insufficient, which causes the engine to slow down.
7. The fuel supply circuit pipe joint of the fuel system is loose or the pipeline is ruptured, causing fuel leakage or foreign matter blockage, resulting in insufficient fuel supply. In addition to the speed drop, it may also cause a flameout problem.
8. There are many reasons for speed drop failure, such as incorrect valve clearance, wrong fuel injection timing, damaged turbocharger, faulty brakes, etc.
Speaking of the reasons that cause the speed of the excavator engine to drop, what should we do when the speed drops?
1. First, check whether the diesel oil used by the excavator has deteriorated, whether there are impurities in the oil, and whether the oil circuit is blocked.
2. Check the valve clearance of the excavator engine and the speed of the engine.
3. Check the intake line, clean the air pre-filter and air filter element, and start the engine again.
4. Check whether the speed drop problem of the excavator occurs under the engine load state?
5. Carefully check the engine to see if the engine of the excavator is slowing down due to engine failure.
6. In addition, electric control, hydraulic system, fuel system, etc. are also required.
We are a comprehensive supplier of excavator accessories, if you have excavator accessories needs, please contact us, we will be glad to receive your inquiry!
Sales Manager：Liam Cheng Wechat/Whatsapp:+8616653175111
