Brake testing with a skid-plate tester

NOTE: This section should be read in conjunction with the equipment manufacturer’s instructions.

Using a skid-plate tester, check the deceleration rates and retardation forces on each axle in accordance with the manufacturer’s test procedure.

Reasons for rejection

1. There is more than 30% difference in the brake force between the wheels on any same axle;
2. The service braking system decelerates the vehicle at less than the performance ;
   
3. In other than ADR 35 vehicles, or vehicles fitted with a tandem master cylinder/dual circuit brakes, the emergency brake decelerates the vehicle at less than the performance ;
4. Where ADR 35 applies, or vehicles fitted with a tandem master cylinder/dual circuit brakes, the parking brake does not provide any retardation.