Finally I changed the brake band .
The brake band was worn-out unevenly .
With a chisel remove the old brake band (or what's left of it) .
Remove the remains with a mini drill or by hand with sandpaper .
Don't forget the goggles and mask . The dust from the old band I'm pretty sure has asbestos , is very toxic .Sorry for the picture .Hope you don't have a nightmare
Roughen the surface for bond strenght .Some lines with the tip of the chisel will do the work.
Cut the necessary lenght of brake band .
Put some masking tape over the brake drum to avoid bonding the band with the drum in case of adhesive leakage .
Prepare for operation . After mixing the 2 components you have aprox. 6 min. to put the brake band and the whole ensemble in place . Don't detach the brake rod . You need to put the whole ensemble in place to draw together the band and the shoe till glued .
Put the brake back in position and put the varidrive lever in PARK .
Leave for 24 hours for bonding .
Let's hope that will last . I'll keep you informed after few runs (hope the tractor will stop with it's brakes not in a fence or something )
Keep in touch .