[Oak]

I don't have a real good pic of one. To raise the deck the actuator is stroked out and to lower it is retracted. If the float pin is in it attaches the two together. Take the tunnel cover off and lower the deck and see if the rock shaft arm will move away from the actuator when you pull up on the deck. In the attached picture you can see the silver pin and it is in the float position here. In the lock position the pin goes through the hole in the rock shaft arm on the end near the back of the pin in the pic. The manual probably explains it better.