Mecalac 12MTX won't move after hose change

Marka i model maszyny: Mecalac 12MTX
Rok produkcji: 2007

Hello guys I am new on Mecalac and this is my first machine. I changed one little hose on the drive train and after that machine won't move.....
I checked everything . What could be the problems? Thanks in advance

Maybe the hose is damage in inside or the bore is too smal. What hose is it?

[Kamal]

Where and how did you exchange this hose?