Что сломалось в Китайском роботе 7DCT300 на пробеге в 20 т.км.

Video Navigation: 00:00 Start 00:01 Introduction and Description of the Gearbox • A disassembled Chinese DCT 300 automated transmission is shown on the table. • This transmission was installed in Renault, BMW, Nissan, and other Chinese vehicles. • The transmission is manufactured by the Chinese company Magna, and designed by BorgWarner. 00:44 Problems with the DCT 300 automated transmission • The transmission has covered approximately 20,000 kilometers, and the housing is clean. • Problem: Noise due to input shaft bearing failure. • The input shaft consists of two parts, each with two bearing supports. 02:45 Analysis of the Causes of Bearing Failure • The bearing is sealed, and lubrication is supplied through splashing. • Possible cause of failure: high load in first gear. • No thrust bearing between the shaft parts. 05:29 Shaft Design Features • One bearing is secured with a stopper and three bolts. • The other, smaller-diameter bearing is secured with a screw. • It is recommended to replace both bearings. 07:05 Comparison with Other Gearboxes • The DCT 300 is based on the DCT 250, but has seven gears instead of six. • The wet clutch allows for greater torque transfer. 10:02 Gear Shift Mechanism • The electric motor controls the forks via gears and worm gear drums. • Four forks, eight gears: seven forward and one reverse. • The plastic insert in the fork is easily replaced. 13:21 Clutch Control System • The electric motor rotates the pumps that control the clutches. • Oil is supplied through a filter into the common circuit. • Oil is distributed between the pumps to control the clutches. 15:14 How the System Works • Oil flows to the pump through a channel and then through a pipe to the hub and clutch. • Along the oil path, it encounters clutch pressure sensors K1 and K2. • The control unit activates a pump that builds pressure, transmitting torque to the gearbox. 16:26 Additional Pumps and Filters • The system has a third pump, controlled by an electric motor. • A plastic filter with a mesh is installed in another part of the gearbox. It can be washed, but is usually replaced. • Oil passes through the filters and goes to cool the clutches. 17:52 Control Unit • The control unit is separate, similar to the 6DCT250 control unit, but without the integrated electric motors. • It is mounted on the front left side of the gearbox. 19:06 Front Cover and Oil Seal • The front cover is aluminum with an integrated oil seal and a metal bearing insert. • The solution allows for replacement of only the oil seal, which is more convenient than replacing the entire cover. 20:03 Cooling and Heating • Antifreeze from the engine cooling system heats the transmission oil. • A circular circuit with a plug ensures the circulation of the antifreeze. • Fins inside the system help improve heat transfer. 21:38 Conclusion • The transmission is simple in design, but has a short service life. • The manufacturer could improve the lubrication system or use higher-quality bearings. • The transmission is repairable, despite the common belief that it cannot be repaired. We'll answer and advise you on all questions about factory automatic transmission and component repair: Automatic Transmission Repair Technologies Phone: +79225056995 Viber/WhatsApp/Telegram: +79225056995 Website: https://технологии-ремонта-акпп.рф/?u... VK: https://vk.com/akppplant YouTube:    / @akpp-plant   Zen: https://dzen.ru/akpp_plant Rutube: https://rutube.ru/channel/30498121/ Telegram: https://t.me/akppplant #7DCT300