1. The defect caused by the diesel oil circuit of the hydraulic drilling rig may generally lead to speed drop when the diesel oil circuit is blocked.
2. The hydraulic system of the hydraulic rock drill has defects, which prevent the hydraulic pump from changing the displacement normally, resulting in high system pressure and possible stalling.
3. The hydraulic drilling rig claims that the machine itself lacks output power, the output power is lower than the rated power, and the speed is too low. Another issue is caused by problems with the main pump.
4. If the quality of the fuel used by the aircraft is too poor or the water content in the fuel is too high, it will lead to a lack of power in the aircraft, resulting in a speed drop phenomenon.
5. When the intake system leaks or becomes blocked, it may result in a lack of air supply to the engine, insufficient combustion of fuel, and the occurrence of speed drop and black smoke.
6. Due to the large vacancy of the solenoid valve, there is a lack of oil supply, which causes the engine to lose speed.
7. Loose or split fuel supply circuit pipe joints in the fuel system can cause fuel leakage or foreign object blockage, resulting in a lack of fuel supply. In addition to speed loss, it may also cause engine stalling problems.
8. There are many reasons for the speed drop defect, such as incorrect valve clearance, incorrect fuel injection timing, damaged turbocharger, faulty brakes, and so on.
