Excavator pilot lock rotary rotary proportional solenoid valve LL00068

In the case of completely normal other conditions, the flameout solenoid valve and starter do not work, resulting in the excavator can not start

Flameout solenoid valve does not work: at the moment when the key start switch hits the starting position, the flameout solenoid valve is fast
The end of the suction coil should have electricity, and the holding coil should have power input after the release of the reset, while the fast suction coil has no electricity; If the input is completely normal and the solenoid valve does not operate, the solenoid valve is damaged; If the input is not normal, please check the corresponding quick suction and hold relay; 2 Starter does not work: When the key start switch reaches the starting position, the starting (R2) end of the key switch should have power output. If no output, the key switch is damaged; After the starting end of the key switch has output to the starting compound relay, measure whether the starting compound relay has output.

If no output two reasons:
1. The starting compound relay is damaged; 3 Start the midpoint signal end of the composite relay with power supply voltage (check the midpoint
Whether the input signal of the signal end is short-circuited with the power supply or the midpoint output of the starter is abnormal. If the output of the starting compound relay is normal, check whether the wiring harness between the output end of the starting compound relay and the starter is intact (measure whether the starting line at the starter end has voltage); If the above situation is completely normal, it can be judged that the starter cannot work normally.