Document ID: chunk:federal_register_of_legislation:F2010C00150:front:0:p13
Version: federal_register_of_legislation:F2010C00150
Segment Type: other
Provision Reference: 
Character Range: 34601–37435

in paragraph 5.2.21.1.1. below shall draw the driver's attention  to any fall in the level of reserve fluid liable to cause a failure of the braking system.

         5.2.13. The type of fluid to be used in hydraulic transmission braking systems shall be identified by the symbol in accordance with figure 1 or 2 of ISO Standard 9128 - 1987 and the symbol DOT3/DOT4/DOT5, as appropriate. The symbols must be affixed in a visible position in indelible form within 100mm of the filling ports of the fluid reservoirs; additional information may be provided by the manufacturer.

5.2.14. Warning device

         5.2.14.1. Any vehicle fitted with a service brake actuated from an energy reservoir must, where the prescribed secondary braking performance cannot be obtained by means of this brake without the use of the stored energy, be provided with a warning device, giving an optical or acoustic signal when the stored energy, in any part of the system, falls to a value at which without re-charging of the reservoir and irrespective of the load conditions of the vehicle, it is possible to apply the service brake control a fifth time after four full-stroke actuations and obtain the prescribed secondary braking performance (without faults in the service brake transmission device and with the brakes adjusted as closely as possible). This warning device must be directly and permanently connected to the circuit. When the engine is running under normal operating conditions and there are no faults in the braking system, as is the case in type approval tests, the warning device must give no signal except during the time required for charging the energy reservoir(s) after start-up of the engine. The red warning signal specified in paragraph 5.2.21.1.1. below shall be used as the optical warning signal.

         5.2.14.2. However, in the case of vehicles which are only considered to comply with the requirements of paragraph 5.2.4.1. of this Regulation by virtue of meeting the requirements of paragraph 1.3. of annex 4 to this Regulation, the warning device shall consist an acoustic signal in addition to an optical signal. These devices need not operate simultaneously, provided that each of them meets the above requirements and the acoustic signal is not actuated before the optical signal. The red warning signal specified in paragraph 5.2.21.1.1. below shall be used as the optical warning signal.

         5.2.14.3. This acoustic device may be rendered inoperative while the parking brake is applied and/ or, at the choice of the manufacturer, in the case of automatic transmission the selector is in the "Park" position.

         5.2.15. Without prejudice to the requirements of paragraph 5.1.2.3. above, where an auxiliary source of energy is essential to the functioning of a braking system, the reserve of energy