If there is no error on the screen, this means that one or both selector valves does not repond despite being supplied with power. So either you continue to work with the units closed or you will manually activate the selector valves. To do this proceed as follow:

1- Stop the PTO and the tractor

2- Go to the rear of the machine on the left side near the tire

3- Open the hatch to access the selector valves. Refer to the following picture.

4- Use the parts provided for this purpose to activate manually the valve. Refer to the following picture.

**Warning this lock will now force lateral movement only, so you will have to remove the lock to raise the unit in question.**