56 Conv top experts

[Grim70]

Looking for some input on the power top. My Dad has owned this car since 1982 (2nd owner) and the top has never worked. I've been working on things for him and I just replaced they cylinders, motor/pump and lines. I've gone through the service manual and the adjustments but something doesn't seem right. Since this is my first encounter with a power top I'm pretty unfamiliar. So far I have not tried to adjust anything as it seemed to match spec.

Here is what I have now.

When putting the top down as it goes up it gets to about the 12 o'clock position and as it goes over it free falls about 1 1/2ft and slams. It then continues down smooth until it is in the full down.

Going up it will move nicely up about 40% and stall. The rods continue to extend but not move the top up. You can then go and help it fully close.

It has me wondering did the previous owner remove something to make it easier to manually operate? I can't see where anything is missing?

As always any input greatly appreciated.