air step repair and troubleshooting

[iwhotoo]

My airstep stopped working. When I hit the switch, I hear click and air
but no movement. I stopped the engine and I hear air leaking out of the
ram. There is a file in archives regarding troubleshooting but it seems
to be gone. Anyone have that info?

Also, what are the two devices mounted under the coach behind the step?
Seems to be a solenoid and some sort of electric motor and another
large thing that has air lines..anyone?