Details: A Carter 349 excavator fires the starter in the morning, and the light assist switch pulls. It takes many starts to respond to the starter. After the excavator starts normally, everything works normally.
The excavator starter does not respond, and it can be hit by knocking on the generator. What is the reason? The carbon brush of the starter is estimated to be worn to the limit and the commutator has poor contact. After knocking, it can barely be connected to use. This can only be temporarily dealt with It is recommended to do a maintenance on the starter and replace the entire set of carbon brushes. Problems with starting relays or circuits.
Caterpillar 349 excavator starter did not respond failure analysis:
It may be that the starter is slipping, it is recommended to maintain the starter under maintenance. The starter does not respond in the morning. It may be cold, and there is a problem with the suction switch on the starter.
It may be that the battery has a little power loss. If there is no problem with the starter, it may be caused by the bad connection of the negative terminal of the battery. You can remove it and wash the lead with hot water.
You can first scrape the terminal with a knife and retighten it. If you ca n’t scrape the terminal of the motor, the weather is cold, the chemical reaction of the battery will be slower, so the discharge is slower, and the power is less. Starting the motor requires maintenance, which is to say Replace the copper sleeve and carbon brush.
Poor line contact or problem with motor relay or switch.
