A.Bad contact of pile head of battery line, oxidation of contact surface, the probability of damage of bucket tooth of excavator, CPU of computer board and instrument increases greatly, and the principle of household appliances is the same, if the safe is bad contact or switch is bad contact, the bulb is always bright and dark, easy to burn out.The electrical system on the excavator is the same as that of household appliances, so pay attention to whether the contact of the accumulator pile head is reliable.

2.Battery wiring reverse connection, excavator bucket tooth serious error, damage rate is very high, fuse slightly burned out, computer panel instrument power circuit and CPU seriously burned out, some excavator wiring with diodes, power positive and negative polarity reverse connection, basically these diodes will also burn out, fuse is inevitable.

3.Accelerator motor failure or abnormal operation.The accelerometer motor used in excavator includes dc motor and stepping motor.If the motor overheating short circuit, it is easy to burn out the computer panel throttle control circuit.This is an inevitable failure.At ordinary times should pay attention to keep the excavator accelerometer motor assembly clean, reduce the probability of failure;The bucket tooth of excavator is electrified.When the excavator throttle motor linkage can not pull, if you have to force to move the throttle lever, it is likely to burn the computer board of the excavator;