What is the third-level repair of motor trains?

The third-level maintenance cycle of motor trains is 450,000 km or 1 year, the fourth-level maintenance cycle is 900,000 km or 3 years, and the fifth-level maintenance cycle is1.8,000 km or 6 years. Three-level maintenance strictly checks three aspects: work quality, engineering quality and product quality.

The maintenance of EMU is divided into one to five levels, the first and second levels are operational maintenance, and the third, fourth and fifth levels are advanced maintenance.

Extended data:

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The maintenance process of motor trains includes daily maintenance, first-class maintenance, regular maintenance and factory maintenance. When the daily maintenance is within 65,438+00,000 km, besides the daily maintenance, it is also important to check, repair or replace the transmission and braking system.

When the regular maintenance exceeds 60,000 kilometers, the state, function and performance of the pantograph, high-voltage electrical appliances, electrical equipment and running gear of the EMU will be tested and overhauled more comprehensively. When the EMU has traveled more than 6,543,800 kilometers, it will be repaired in the factory, and the EMU will be dismantled, fully maintained and parts will be replaced to reach the technical level of the new car.

People's Network-Chengdu EMU has passed the qualification examination of three-level maintenance of Chengdu Bureau.