This indicates that the pilot pressure switch has been damaged and the fault is resolved after replacing the new pilot pressure switch. The pilot pressure switch is interchangeably connected with the idle port at the oil port, and the fault disappears after the test machine. This check indicates that there are no problems with the controller program and the electrical control circuit. When the pilot handle is inactive, the engine does not enter the automatic idle operation.
The connector is short-circuited at both ends, and the signal collected by the controller is low. Hydraulic excavator repair refers to the technical activities carried out to restore its function after the technical state of the equipment deteriorates or fails, including various planned repairs and unplanned fault repairs and repairs. In each model, the electronic control system and fault diagnosis and troubleshooting methods are also systematically introduced. The structure and working principle of the pump, valve, motor, hydraulic cylinder and auxiliary components in the hydraulic system are introduced in detail, and the disassembly, repair and installation methods of each component are described in detail. The hydraulic excavator repair introduces, systematically and concretely the hydraulic system of the excavator. The idle state is running and no fault has occurred. Under the condition that the pilot handle (bǐng) is inactive, the engine still enters the automatic state. Unplug the pilot oil pressure switch connector, the signal collected by the control is high. This phenomenon is reborn and the time of occurrence is not fixed. However, the engine automatically idling (Windows) will automatically increase the speed after a period of time, and then return to the automatic idle state. It is recognized that the engine automatic idle function can be realized. Hyundai R225LC-7 engine (RotationalSpeed) sudden rise fault troubleshooting: According to the above fault cause analysis, we carry out the following troubleshooting: turn on the automatic lock function, without operating the pilot handle (bǐng) (Condition) Observe the engine’s automatic idle state. We believe that the main cause of engine auto-idling function failure is the following four points: First, the controller control program (problem) has a problem, causing the engine speed signal to be abnormal second, the pilot pressure (pressure) switch is faulty, causing the pressure switch The working condition of the excavator cannot be reflected correctly the third is that the electrical control circuit has a virtual connection phenomenon, causing the signal to be detected by the controller and the fourth is the clogging phenomenon of the pilot hydraulic control circuit, causing the pilot pressure switch to fail to reflect Real manipulation. Analysis of the sudden increase in the speed of the Hyundai R225LC-7 engine (Analyst): According to the working principle (Maxim) of the excavator engine white idling function. In the case that the excavator work device does not operate, this phenomenon is reversed and the time interval of the fault is not fixed. The resulting failures provide a good guarantee for people’s safety. Excavator repairs Regular vehicle cleaning, component inspection and lubrication, and replacement and repair of damaged parts are mainly for the purpose of effectively working the excavator and good technical state, avoiding the loss of components.
After revolve for a while, it returns to the automatic idle state. Excavator repair|Excavator repair|Maintenance excavator fault phenomenon: After the engine automatic idle function is turned on, the engine speed (RotationalSpeed) suddenly rises when the job device is inactive (Condition).
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