4WG200 ZF transmission solenoid valve Liugong Loader 85650D862842\0501313374

   Introduction to electrical maintenance of ZF 4WG200 transmission

With the expansion of the international market, more and more loader products are sold abroad. In order to provide foreign customers with high quality Effective products, loaders are usually equipped with well-known manufacturers of gearboxes. Due to long-term work in harsh conditions, Failure is inevitable, in contrast to the most common electrical failure, the user can eliminate according to the ability, such as If it is determined to be a mechanical fault, you can ask the service personnel to eliminate. Now the loader with the most available ZFWG200 Gearbox Brief description of common electrical fault judgment and elimination.The ZF 4WG200 transmission is a product of German driveline supplier ZF, which uses electro-hydraulic control.Fixed shaft power shift transmission, gear for the first four and then three, supporting engine power of about 200KW,Commonly used in 5 ton and 6 ton loaders.The transmission system is composed of gear selector, electric control box, sensor, variable speed control valve, gearbox, etc

     Solenoid valve is an important electric actuator to ensure the normal operation of automatic transmission. The different states of the solenoid valve correspond to different gears, and its working state also affects the working state of the automatic transmission. Naturally, the detection of the solenoid valve is also an essential part of the automatic transmission maintenance process. What happens when the automatic transmission solenoid valve breaks?

1. The gearbox will not downshift. If the gearbox does not downshift, one of the shift solenoid valves may be stuck in the on/off position, which will prevent oil from entering the gearbox body to pressurize the correct gear.

2. Serious shift delay/neutral is caused by the shift of the electronic automatic transmission, and the electromagnet must be able to adjust the hydraulic oil to start the appropriate gear. If the shift solenoid receives too much or too little current, or if dirty transmission oil affects its opening/closing, gear meshing can become difficult or delayed, which can affect transmission operation as if it were temporarily locked in the transmission.

3. Shifting gears is wrong. The transmission solenoid valve is faulty. The transmission can skip a gear, shifting back and forth between gears repeatedly, or it can refuse to shift because it is stuck in first gear.