OK, I have a 1940 Ford Convertible with a power top. The top goes down but, will not go up. If I grab hold of it and help it, it will come up as I pull on it. Any ideas? Someone said the pistons have a place to fill them. I don't see any. I can see a strip of relays and a bunch of wires attached. I will have to figure out how to take off the panel to get to them.