No brakes and pedal goes to the floor

Hello,

When the pedal goes straight to the floor, the first thing you need to do is check for leaks. If one of the brake hoses from the caliper got lose or ruptured it will leak out fluid and will not build any pressure.
So first do a through inspection of the brake lines and hoses to see if there is any leak.

Also did you had to take off the brake hose from the caliper when changing the hub assembly? If so, did you bleed the brakes after reattaching the hose?

Take a look at this article, it goes over all the basic issues:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

The pedal can also go to the floor if there is an issue with the brake master cylinder.

Let me know what you find.
Thank you.