Document ID: chunk:federal_register_of_legislation:F2021C00482:body:0:p10
Version: federal_register_of_legislation:F2021C00482
Segment Type: other
Provision Reference: 
Character Range: 27586–30601

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 shall be of a contrasting colour to that of the background.
35.2.5.                          Special Provisions for Systems Using 'Stored Energy' (except 'Spring Brake Systems')
35.2.5.1.                    Any 'Stored Energy' device for the operation or to assist in the operation of the braking system, shall be so protected that failure of the device generating the energy does not result in depletion of the 'Stored Energy'.
35.2.5.2.                    Where the device generating the energy for a 'Brake Power Unit 35/00' supplies energy to other devices the design shall be such that the 'Brake Power Unit 35/00' is preferentially charged.
35.2.5.3.                    For systems incorporating 'Brake Power Units 35/00', the combined volume of all 'Stored Energy' devices at positive pressure shall be not less than 12 times the combined volume of all service brake chambers at maximum travel of the pistons or diaphragms.
35.2.5.4.                    Any device generating energy at positive pressure for a 'Brake Power Unit 35/00' shall be of sufficient capacity to increase the pressure in the 'Stored Energy' device(s) from 85 per cent of the 'Average Operating Pressure' to the 'Average Operating Pressure' with the vehicle's engine operating at the 'Manufacturer's' recommended maximum engine speed within a time given by the expression:
         Actual 'Stored Energy' capacity  25 (seconds)
                  Required 'Stored Energy' capacity
35.2.5.5.                    For service brake systems incorporating 'Brake Power Units 35/00' and operating at positive pressure a gauge(s) shall be fitted to indicate the pressure in each independent storage system. The gauge(s) shall be visible to the driver when seated in the normal driving position and shall be accurate to within ± 7 per cent of the cut-out pressure of the pressure limiting device fitted to the energy source.
35.2.5.6.                    For systems incorporating 'Brake Power Assist Units', the combined volume of all 'Stored Energy' devices shall be such that with no replenishment of 'Stored Energy' the performance prescribed for the Laden Secondary Brake Test in clause 35.5.7 shall be achieved:
35.2.5.6.1.              where the energy source is a pump, on the eighth actuation of the service brake 'Control', after 7 actuations with vehicle stationary, either to full stroke or to the application of a 'Pedal Effort 35/00' not less than 685 N whichever occurs first; or
35.2.5.6.2.              where the energy source is the engine of the vehicle, on the fourth actuation of the service brake 'Control', after 3 actuations with vehicle stationary, either to full stroke or to the application of a 'Pedal Effort 35/00' not less than 685 N, whichever occurs first.
35.2.5.7.                    An energy generating