Document ID: chunk:federal_register_of_legislation:F2025C00108:front:0:p14
Version: federal_register_of_legislation:F2025C00108
Segment Type: other
Provision Reference: 
Character Range: 39616–42605

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.
 1.                                     Special provisions for systems using 'Stored Energy' (except 'Spring Brake Systems')
     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'.
     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.
         1.                         The volume of a brake chamber of a type specified in Table 4 is taken as being either the rated volume listed in this table or the actual volume of the brake chamber at the maximum travel of the brake piston/pushrod, whichever is lower.
         2.                         The volume of a brake chamber not listed in Table 4 is the actual volume of the brake chamber at the maximum travel of the brake piston/pushrod.
     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 per cent 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:
 1.                               In clause 5.7.3, 'Brake Power Unit 35/...' test capacity is:
         1.             the minimum combined volume of all the service brake chambers required by clause 5.7.2 above, plus;
         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.
 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'.
 1.                               For 'Service Brake System' incorporating 'Brake Power Units 35/...' and operating at positive pressure:
         1.             a gauge, visible to the driver when seated in the normal driving position, must be fitted to indicate the pressure in each independent storage system, to within 7 per cent of the cut-out pressure