A low braking effort is recorded from the parking brake on any wheel, indicating clearly that the brake is not functioning correctly.

 

The parking brake efficiency recorded is less than 18%.

 

The service brake efficiency recorded is below the minimum required

 

The calculated service brake efficiency (with the brake distribution adjustment device set to give minimum rear brake effort) is below the minimum requirement.

 

In the case of a three-wheeled vehicle where the secondary brake utilises the parking brake control, the secondary brake efficiency recorded is less than 25%.

 

When the service brake is applied

 

i. the brake is not capable of progressive operation.

ii. there is severe grab or judder;

iii. the vehicle deviates to the left or right

iv. the pedal does not return to the fully off position.

 

All wheels of the rear axle(s) "lock" prior to both wheels of the front axle.

 

The transmission parking brake efficiency is less than 18%.