1. Change the transmission ratio;
2. Make the car run backward when the engine rotation direction remains unchanged;
3. Use neutral gear to interrupt power transmission, so that the engine can start and idle, and it is convenient for the
transmission to shift gears or power output.
The double h valve has no influence on the main box only when the high and low gears are changed. If the double h valve has problems, it has no influence on the fork, but has influence on the friction of the synchronizer of the auxiliary box. Therefore, the double h valve should be replaced in time.
2. Make the car run backward when the engine rotation direction remains unchanged;
3. Use neutral gear to interrupt power transmission, so that the engine can start and idle, and it is convenient for the
transmission to shift gears or power output.
The double h valve has no influence on the main box only when the high and low gears are changed. If the double h valve has problems, it has no influence on the fork, but has influence on the friction of the synchronizer of the auxiliary box. Therefore, the double h valve should be replaced in time.