C15 TA brakes
 

I am unfamilier with the brake system that the TA uses. Has the piston thingie connected to the brake master cylander....

Ok , the TA arrived with an empty master cylander. I filled and left for a few days to see if there wer obvious leaks. Didn't see any. Do began bleeding them wheel points. Didn't get air with fluid... just fluid.

I recalled this ha some kind of brake assist that my old C-15 A didn't have.

When I step on the pedal, the pedal goes to the floor and stays there, but I can catch with my toe and bring back

Looks like the return spring is there.
I the brake assist is complicating things. Any suggestions? Yeah, I realize I am asking truck 101 beginer questions. I have a parade coming up end of May and won't take the truck with just the handbrake....

I am not too proud to ask for help....

Cheers,
Jim