Tensioner removal toyota yaris 1,4 d4d 2011y

[kulfonik123]

I need help. I am repairing toyota yaris 1,4 D4D 2011 y. Its stop and cannot start it .
On my eye it is bearing from generator.
I need remove the belt to get to generator(and replace the bearing). cannot do it because i have no experience with this type of tensioner. if someone who has experience with this type of tensioner could write few words I will be very apreciate it.

I am pensioner wchich repairing cars of my family(sons and others)
Tensioner type which is in my son toyota i under

[kulfonik123]

https://4cars.pl/img/50/max/skf-vkm61042-napinacz-paska.jpg

[kulfonik123]

The mater is solved. I made the imbus wrench (welded square shape bare to handle)
I was using this wrench to slack the belt.
The wrench fit to square shape hole in tensioner, so i put wrench to hole and pres it until get slack on belt. Rest was easy.