Brake efficiency

What is the minimum acceptable breaking efficiency for HGV on a brake tester?

45%

Service, Secondary or Handbrake?

Service brake 50 percent
Secondary 25 percent
Park brake 16 percent
But it can change as locks can give a pass if the results are lower

Does unit stop when peddle is pressed = yes.

Crack on.

Brake no worky return to base using gearbox to slow down.