Non-Tariff Barriers

Non-Tariff Measure

NTM classification

B7: Product quality, safety or performance requirements 

Date when the measure came into force

17 July 1975 

Publication where the measure is specified

Government Notice 128 (Government Gazette 4562) Of 17 January 1975 

Regulation where the measure is specified

Compulsory Specification For Hydraulic Brake And Clutch Fluid 

Country/Region applying the measure

South Africa 

The rationale of the measure

This specification covers fluid of the non-petroleum and the non-silicone types suitable for use in automotive
hydraulic brake and clutch systems. 

Coded list of objectives

X: For purposes n.e.s. 

Description of the measure

3. REQUIREMENTS.
3.1 GENERAL.--The fluid shall be homogeneous, clear, and free from grit, mineral oil, and other impurities which may have a deleterious effect on the performance of the the fluid.

3.2 EQUILIBRIUM REFLUX BOILING POINT AT A PRESSURE OF 101,325 kPa.
When tested in accordance with 4.1 the equilibrium reflux boiling point of the fluid shall be not lower than 230 °C.
3 3 WET EQUILIBRIUM REFLUX BOILING AT A PRESSURE OF kPa.
When tested in accordance with 4.3 the wet equilibrium reflux boiling point of the fluid shall be not lower than 140 °C.
3.4 KINEMATIC VISCOSITY.-When tested in accordance with 4.4, the kinematic viscosity of the fluid shall be as follows:
(a) At -40 °C: not more than 1 800 mm2/s; and
(b) at I00 °C: not less than 1,5 mm2/s.
3.5 NEUTRALITY.
When tested in accordance with
4.5 (both before and after the corrosion test). the pH value of the test mixture shall be between 7,0 and 11,5.
3.6 FLUID STABILITY.
3.6.1 Stability at high temperatures
When tested in accordance with 4.2.1, the equilibrium reflux boiling point of the fluid shall not change by more than 3,0 °C, plus 0,05 °C for each degree that the original equilibrium reflux boiling point exceeds 225 °C.
3.6.2 Chemical stability.
When tested in accordance with 4.2.2, the change in temperature of the refluxing fluid mixture shall not be more than 3,0 °C plus 0,05 °C for each degree that the equilibrium reflux boiling point exceeds 225 °C.
3.7 CORROSIVENESS.--When tested in accordance with 4.6-
(a) the fluid shall not cause corrosion of the metal strips in excess of the corrosion limits given in Table 1 and the surfaces of the metal strips that were not in contact with each other shall not be pitted or etched to an extent discernible to the eye. Staining or discoloration of these surfaces shall not be regarded as a sign of failure;
(b) the fluid-water mixture shall show no jelling at 23+/-5 °C, no crystalline deposit shall form in the jar or adhere to the walls of the jar or to the surface of the metal strips and the fluid-water mixture shall contain not more than 0,10 percent by volume of sediment when determined in accordance with 4.6.4;
(c) the rubber cups shall show no disintegration as evidenced by sloughing or blistering;
(d) the base diameters of the rubber cups, determined in accordance with 4.6.2 (a), shall not increase by more than 1,4 mm ; and
(e) the hardness of the rubber cups, determined in accordance with 4.6.2 (b), shall not decrease by more than 25 degrees.
3.8 FLUIDITY AND APPEARANCE AT LOW TEMPERATURE.
3.8.1 At -40 °C.-When tested in accordance with 4.7.1, the black contrast lines on the hiding power chart shall be clearly visible viewed through the fluid in the sample bottle as a whole, the fluid shall show no stratification or sedimentation and, upon inversion of the sample bottle, the time taken for the air bubble to travel to the top of the fluid shall not exceed 10 seconds.
3.8.2 At -50 °C.-When tested in accordance with 4.7.2, the black contrast lines on the hiding power chart shall be clearly visible when viewed through the fluid in the sample bottle as a whole, the fluid shall show no stratification or sedimentation and, upon inversion of the sample bottle, the time taken for the air bubble to travel to the top of the fluid shall not exceed 35 seconds.

3.9 EVAPORATION.
3.9.1 Percentage evaporation.-When tested in accordance with 4.8 not more than 80 percent by mass of the fluid shall be evaporated.
3.9.2 Quality of residue.-When examined as described in 4.8.3, the residue from the fluid after evaporation shall contain no precipitate that remains gritty or abrasive when rubbed with the fingertip.
3.9.3 Pour point of residue.-When tested in accordance with 4.8.4. The pour point of the residue shall be not higher than -5 °C.
3.10 WATER TOLERANCE.
3.10.1 At -40 °C.-When tested in accordance with 4.9.1 the black contrast lines on the hiding power chart shall be clearly visible when viewed through the fluid in the centrifuge tube as a whole, the fluid shall show no stratification or sedimentation and, upon inversion of the centrifuge tube, the time taken for the air bubble to travel to the top of the fluid shall not exceed 10 seconds.
3.10.2 At 60 °C.-When tested in accordance with 4.9.2, the fluid shall show no stratification and the sediment
content shall not exceed 0.15 per cent by volume after centrifuging.

3.1 1 COMPATIBILITY.
3.1 1.1 At -40 °C.-When tested in accordance with
4.10.1. The black contrast lines on the hiding power chart shall he clearly visible when viewed through the fluid in the centrifuge tube as a whole, and the fluid shall show no stratification or sedimentation.
3.1 1.2 At 60 °C.-When tested in accordance with
4.10.2, the fluid shall show no stratification and the sediment content shall not exceed 0,05 per cent volume after centrifuging.

3.12 RESISTANCE TO OXIDATION.-When tested in accordance with 4.1 1-
(a) the fluid shall not cause the aluminium strips and the cast iron strips to change in mass by more than 0.05
mg per cm3 and 0,3 mg per cm3 respectively; and
(b) the surfaces of the metal strips that were not in contact with the tinfoil shall not become pitted or etched to an extent visible to the eye. Staining or discoloration of these areas shall not be regarded as a sign of failure.
Not more than a trace of gum shall be deposited on these surfaces.
3.1 5 EFFECT ON RUBBER.
3.13.1 At 70 °C.-When tested in accordance with 4.12.2 (a)-
(a) the average increase in the base diameters of the rubber cups shall be not less than 0.15 mm and not more than 1.4 mm; and
(b) the rubber cups hall show no increase in hardness, shall not decrease in hardness by more than 18 degrees, and shall show no disintegration as evidenced by sloughing, stickness, or blistering.
3.13.2 At 190 °C.- When tested in accordance with 4.12.2 (b) -
(a) the average increase in the base diameters of the rubber cups shall be not less than 0.15 mm and not more than 1,4 mm; and
(h) the rubber cups shall show no increase in hardness, shall not decrease in hardness by more than 25 degrees, and shall show no disintegration as evidenced by sloughing, stickiness, or blistering.
3.14 SIMULATED SERVICE PERFORMANCE.-
When tested in accordance with 4.13, the fluid shall meet the following performance requirements:
(a) The metal parts of the test system shall not show corrosion as evidenced by pitting or etching to an extent
visible to the eye. Staining or discoloration of these areas shall not be regarded as a sign of failure.
(b) The initial diameter of any cylinder or piston shall not change by more than 0.13 mm during the test.
(c) The cylinder pistons shall not seize or fail to function properly at any stage during the test.
(d) None of the 10 rubber cups shall show an increase in base diameter of more than 0,9 mm.
(e) The average decrease in hardness of nine of the I0 rubber cups-consisting of eight wheel cylinder primaries and one master cylinder primary-shall be not more than 25 degrees and none of the 10 cups shall show stickiness, scuffing, blistering, cracking, chipping, or change in shape from its original appearance.
(f) The average lip diameter interference set of the 10 rubber cups shall not exceed 65 per cent.
(g) The volume of fluid lost during ally period of 24000 strokes shall not exceed 36 ml.
(h) The volume of fluid lost during the last 100 strokes of the test shall not exceed 36 ml.
(i) At the end of the test fluid shall not show jelling. The sediment content determined in accordance with 4.6.4 shall not exceed 1,5 percent by volume after centrifuging.
(j) No deposits that are abrasive or cannot be removed when rubbed moderately with a non-abrasive cloth wetted with 95 percent ethanol shall form on or adhere to brake cylinder walls. 

Reference of the measure

Regulation 3 

Measure also domestic

Yes 

Products affected by the measure.

Description

Hydraulic brake and clutch fluid 

Countries/Regions affected by the measure.

Description

All countries