1, single action failure
(1) Action is slow or no action at all.
First check the primary oil passage, cross the valve; if normal, check the operating valve, see if the corresponding valve heart is card-dead; if normal, you should check the other parts of the execution component and related to it.
(2) The mutual disorder excavator sometimes does not need to manipulate and there are some movements. The nature of this phenomenon is that the pressure oil enters the actuator when the work loop should be closed. Possible fault points are: joysticks related to the fault action and pilot valve (mechanical manipulated machine should be pulled), the valve valve core and the valve body. The specific inspection method is: block the corresponding piping of the corresponding valve, if the fault disappears, the fault is in the joystick and the pilot valve portion; otherwise it should be checked whether the valve heart is killing, excessive friction or assembly errors; If the valve is normally, it should continue to check whether the valve body and other components (such as oil seals) or the like are damaged.
2, a few sets of active valve control simultaneously not normal
(1) Fault subsystem main relief valve fault. The main overwheel valve in the fault subsystem is called the primary subsurface the main branch valve. If the fault is moved to another, the original fault system is the main overflow valve failure, such as the backpapers fail. In the atomic system, the main overflow valve is working properly and should be found for a failure.
(2) The subsystem of the fault is the hydraulic pump fault. Among them, the hydraulic pump is damaged and the assembly will cause all the movements of the machine to be lost, and the hydraulic pump wear will make this group move slowly. Regardless of its fault form, as long as the above analytical method is determined, further examination, disassemble, and disassemble the problem.
Similarly, the suspicion of hydraulic pumps can also be used to exchange the pump outlet pipe, thereby changing the working pump of the subsystem, regarding whether the failure of the subsystem changes. When it is changed, it is a hydraulic pump failure, otherwise the fault is not in the hydraulic pump.
(3) Fault subsystem hydraulic pump adjustment mechanism fault. The performance of the hydraulic pump adjustment mechanism is: the hydraulic pump operating conditions cannot be changed as the working device working condition. Check the pump flow to adjust the plunger, and the plunger card can be free to move freely. If it is not free to move, it is moving such that the working device needs the hydraulic pump to increase the flow, due to the adjustment of the plunger card, the flow cannot be increased, but the action is slow. The pump adjustment mechanism is disintegrated, and it is found that there are some grinding flowers in the regulating plunger, and the polishing washed back and the fault disappears.
