Document ID: chunk:federal_register_of_legislation:F2014C01109:body:0:p12
Version: federal_register_of_legislation:F2014C01109
Segment Type: other
Provision Reference: 
Character Range: 34299–37405

displacement necessary to charge the piston(s) or accumulator(s) provided for the purpose of storing energy.
4.6.4.                              A statement specifying the type of fluid to be used in the brake system and displaying at least the words "WARNING.  Clean filler cap before removing" must be permanently affixed, stamped, engraved or embossed with letters not less than 3 mm high, 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.  If not stamped, engraved or embossed, the lettering must be of a contrasting colour to that of the background.
4.7.                                    Special Provisions for Systems Using 'Stored Energy' (except 'Spring Brake Systems')
4.7.1.                              Any 'Stored Energy' device for the operation or to assist in the operation of the braking system, must be so protected that failure of the device generating the energy does not result in depletion of the 'Stored Energy'.
4.7.2.                              For systems incorporating 'Brake Power Units 35/...', the combined volume of all 'Brake Power Unit 35/...' devices at positive pressure must be not less than 12 times the combined volume of all the service brake chambers at their maximum travel of the pistons or diaphragms.
4.7.3.                              Any device generating energy at positive pressure for a 'Brake Power Unit 35/...' must be of sufficient capacity to increase the pressure in the 'Stored Energy' device(s) actually fitted to the vehicle from 85 percent of the 'Average Operating Pressure' to the 'Average Operating Pressure' with the vehicle's engine operating               at the 'Manufacturer' recommended maximum engine speed within a time given by the expression:

       Time =         Actual 'Brake Power Unit 35/...' capacity  25(sec)
                      'Brake Power Unit 35/...' test capacity

4.7.4.                              In 4.7.3, 'Brake Power Unit 35/...' test capacity is:
4.7.4.1.                        12 times the combined volume of all the service brake chambers at their maximum travel of the pistons or diaphragms plus,
4.7.4.2.                        in the case of a motor vehicle equipped to tow a trailer which uses air at a positive pressure, an additional 1.0 litre per tonne of  'Rated Towing Capacity' to allow for trailer service chambers.
4.7.4.2.1.                  For vehicles with a 'Gross Combination Mass' in excess of 65 tonnes, the value of 'Rated Towing Capacity' for the purpose of this calculation must be as described in the definition of 'Rated Towing Capacity' with a value of 65 tonnes used in place of the actual vehicle 'Gross Combination Mass'.
4.7.5.                              For 'Service Brake System' incorporating 'Brake Power Units 35/...' and operating at positive pressure;
4.7.5.1.                        a gauge(s) must be fitted to indicate the pressure in each independent storage system. The gauge(s) must be visible to the driver when seated in the normal driving position and must