What is the minimum acceptable breaking efficiency for HGV on a brake tester?
Post 1968:
50% DGVW service brake
25% DGVW Secondary
16% DGVW & 12% DGTW Parking
DGVW Desisgn Gross Vehicle Weight
DGTW Design Gross Train Weight
Secondary Brake
“This inspection applies to all motor vehicles where the designated secondary brake operates independently of the service brake.”
“On vehicles where the service brake split system is designated as the secondary option the performance of this brake is not required to be assessed. Any brake test printout indicating failure to meet the secondary requirements must be overruled along with any prompts for an alternative option.”
“Where the designated secondary (using the park brake system) fails to meet the requirements an alternative secondary must be considered as and where it applies. Both halves of the split system must meet the secondary efficiency requirement independently.”
Or taking it for test on a day it’s ■■■■■■■ down and getting the wheels to lock.