Specifications

Brake assessment manual Ver 1.0 Published October 2013 35 (48 pages)
Test A: Reservoir volume
[Based on: ADR 31/00, Clause 31.2.5.]
Where the service brake system incorporates a master cylinder, all service brake
subsystems serviced by the master cylinder must have either:
• a reservoir which contains fluid exclusively for the use of that service brake sub-system; or
• a reservoir which contains fluid for the use of two or more service brake sub-systems in
which case that part of the reservoir capacity provided exclusively for the use of each
service brake sub-system must be not less than the volume displaced by the master
cylinder piston servicing the sub-system, during a full stroke of the piston.
The capacity of each reservoir must be not less than the fluid displacement resulting when all
the wheel cylinders or calliper pistons serviced by the reservoir move from a new-lining, fully-
retracted position, as adjusted according to the Manufacturer’s recommendations to a fully-
worn, fully applied position. For the purposes of this test, ‘fully-worn’ means that the lining is
worn to whichever of the following conditions allows the greatest shoe or pad movement:
1. level with rivet or bolt heads on riveted or bolted linings;
2. within 0.8 mm of shoe or pad mounting surface on bonded linings or pads; or
3. the limit recommended by the Manufacturer.
Each Brake Power Unit must have a device for storing energy of capacity not less than the
total capacity of the reservoirs required above plus the fluid displacement necessary to
charge the piston(s) or accumulator(s) provided for the purpose of storing energy.
A statement specifying the type of fluid to be used in the brake system and displaying at least
the words in letters not less than 3 mm high ‘WARNING. Clean filler cap before removing’
must be permanently affixed either on, or partially within 150 mm of, one brake fluid reservoir
filler plug or cap, and totally within 300 mm of all reservoir filler plugs or caps. The statement
must either be stamped, engraved or embossed, or comprise lettering of a contrasting colour
to that of the background.