What sort of pedal travel do you have push down slowly & gently can you feel the foot break change when hand break is pulled on difficult to explain, if you can could be auto adjusters not working
Adjusting HB is usually not required if break shoes are ok or the self adjusters not doing their job.
In our present Doblo driven hard we have not fitted rear shoes or adjusted HB in 152K now front pads & discs are a different matter