New Tilt Trim Question

I need some more help please.

I put in a new-to-me tilt/trim pump and 3-button harness in an 81 Welcraft V20 as most of you know

The tilt and trim was working ok after the new pump was installed, though it would move up and down super slow, painfully slow.

Now that I lowered it, it will not come back up? It was going up and down before.

The buttons work and the pump runs, but the outdrive does not move. While experimentating before it was all the way down, I noticed that it would still lower, but will not go up.

It was going up and down before.

There is no clicking noise and the pump seems to be working properly. Just no upward movement.