1, the positive battery is connected to the horse big tooth suction terminal, the battery is connected to the motor shell terminal, and the shell without terminal is connected. There is also a small terminal on the tooth suction of the motor to connect the positive terminal and start. If the breaker is installed on the positive electrode, the essence is a switch.
2, the positive electrode of the battery is connected to the positive level of the start motor relay, and the negative electrode of the battery is connected to the diesel body. The positive and negative terminals of the relay are connected to the start switch.
3. The positive terminal of the battery is connected to the positive terminal terminal of the starter, and the negative terminal of the battery is connected to the body.
4, the negative electrode of the battery, the fire line is connected to the starter fire line, the relay fire line is connected to the 4 square line, the starter small wire column is connected to the relay ignition relay housing to be solid, and the ignition switch can be connected.

Maintenance method
In order to extend the service life of the diesel engine, in the process of use, it is necessary to strengthen the maintenance of the three kinds of filters, air filters, oil filters and fuel filters, and give full play to their role.
During the installation of the air filter, it is not allowed to leak, reverse install or misinstall the sealing gaskets and rubber connecting pipes, and ensure the tightness of each insert. The use of paper dust collecting cup air filter, every 50-100 hours of work, to remove the dust once, can be brushed off the surface of the soft brush, if the working time exceeds 500 hours or has been damaged.
It should be replaced in time. The use of oil bath air filter, every 100-200 hours of work, the use of clean diesel oil to clean the filter element, and replace the lubricating oil, if the filter element has been broken, it needs to be replaced immediately, and pay attention to the use of oil, according to the regulations.
If the lubricating oil filter is not maintained in time in the use of diesel engine, the filter element is blocked, the lubricating oil pressure is increased, the safety valve is opened, and the lubricating oil directly flows into the main oil passage, which will aggravate the wear of the lubricating surface and affect the service life of the diesel engine. Therefore, the lubricating oil filter should be cleaned once every 180-200 hours, and the damage is found.
It should be replaced immediately to prevent impurities from entering the lubricated surface. Diesel engine seasonal use, should also clean the crankcase and the lubricating surface, the method is to use lubricating oil, kerosene and diesel mixed for washing oil, can be released after the oil to add washing oil cleaning, then the diesel engine at low speed 3-5 minutes, and then put the washing oil, add new lubricating oil.