Specifications

Brake assessment manual Ver 1.0 Published October 2013 25 (48 pages)
Appendix 4: Using a Plate-Type Test Machine
A plate-type brake test machine may be used to do a basic determination of the performance
of the brakes, and some of the tests specified in Table 3. The tests are listed below, with
applicable pass criteria; and examples of data and read-outs obtained from a plate-type
brake test machine are provided for some of the tests. The tests are:
Basic performance test – see data and read-outs for 4.1
This gives a general assessment of the brakes and how they perform, namely:
• Left to right brake imbalance for both front and rear brakes
• Front to rear brake imbalance
• Brake pedal force applied
• Peak deceleration rate
• Average deceleration rate
• Handbrake/park brake imbalance
• Peak handbrake/park brake deceleration rate
• Wheel alignment
Test D Test with front brakes disconnected – see data and read-outs for 4.2
The read-out should indicate that the brakes are capable of exerting sufficient force to bring
the vehicle to a stop. To pass this test, the peak deceleration must have a minimum rate of
20%
Test D Test with rear brakes disconnected – see data and read-outs for 4.3
This corresponds to Test D in Table 3. The read-out should indicate that the brakes are
capable of exerting sufficient force to bring the vehicle to a stop. To pass this test, the peak
deceleration must have a minimum rate of 50%
Test E Test with booster disconnected – see data and read-outs for 4.4
The read-out should indicate that the brakes are capable of exerting sufficient force to bring
the vehicle to a stop. To pass this test, the peak deceleration must have a minimum rate of
50% applied with a pedal force pressure of 500 N.
Test B To pass this test, the mounting structure must remain rigid with the following loads
applied :
• 500 N for vehicles in Modification Category 19;
• 885 N for vehicles manufactured prior to the introduction of ADR 31 on 1 January 1977;
• 1000 N for vehicles manufactured after the introduction of ADR 31 on 1 January 1977.
Test F To pass this test, the front axle brake force must be between 55% minimum and
90% maximum, while the rear axle brake force must be between 10% minimum and 45%
maximum.
Test G To pass this test, with the ABS disconnected, the front axle brake force must be
between 55% minimum and 90% maximum, while the rear axle brake force must be between
10% minimum and 45% maximum..
Test I To pass this test, the front axle brake force must be between 55% minimum and
90% maximum, while the rear axle brake force must be between 10% minimum and 45%
maximum; and the front wheels must lock before the rear wheels, which can be determined
from the graph in Test 4.1.
For all the tests, the vehicle should be tested in the unladen condition with just the driver, and
it should be in neutral gear.