Fault phenomenon: Hitachi zx240-3 excavator stopped for one night and failed to start before working the next day.
Fault repair details:
1. Generally, if the excavator fails to start after stopping for one night, the owner can check whether there is circuit fault in the excavator If the machine fails to start the next day after one night of shutdown in winter, it is first necessary to check whether the excavating oil has waxed due to the low temperature.
2. Hitachi zx240-3 excavator fails to start circuit inspection steps:
(1) First, check whether the fuse is normal.
(2) Check that the battery relay is not engaged.
(3) Check the battery. It is found that the positive terminal is burnt out. It is analyzed that the snap ring of the terminal is not installed tightly. At the moment of starting, the terminal is burnt out because the contact surface is too small and the starting current is too large.
3. Maintenance method for Hitachi zx240-3 excavator unable to start: the test run is normal after replacing the battery.
4. Failure analysis of Hitachi zx240-3 excavator unable to start: this case is due to the fact that the positive wiring was not clamped when the battery was assembled, resulting in the burning of the terminal post by the electric arc generated by the instantaneous high current during startup.
5. Handling experience: through this case, I hope I can be more careful in my future work and avoid avoidable faults to the machine due to negligence.
