BS ISO 4928:2006

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
  4.1 Workmanship and finish
  4.2 Marking
  4.3 Packaging
  4.4 Sampling
5 Test requirements
  5.1 Resistance to fluid at elevated temperature
  5.2 Precipitation
  5.3 Wheel cylinder seals heat pressure stroking
  5.4 Master cylinder seals heat pressure stroking
  5.5 Low-temperature performance
  5.6 Oven ageing
  5.7 Corrosion
  5.8 Storage corrosion test
6 Test procedures
  6.1 Resistance to fluid at elevated temperature - Dimensional
      test
  6.2 Precipitation test
  6.3 Wheel cylinder seals heat pressure stroking
  6.4 Master cylinder seals heat pressure stroking
  6.5 Low-temperature performance
  6.6 Oven ageing
  6.7 Hardness determination
  6.8 Corrosion test
  6.9 Storage corrosion test

Describes performance tests of brake cups and seals for hydraulic braking systems for road vehicles; it does not include requirements relating to chemical composition, tensile strength and elongation of the rubber compound.

This International Standard specifies performance tests of brake cups and seals for hydraulic braking systems for road vehicles; it does not include requirements relating to chemical composition, tensile strength and elongation of the rubber compound. Disc brake seals are not covered by this International Standard.

This International Standard is applicable to moulded seals (cups or double-lipped type gland seals), 60mm in diameter and smaller, compounded from high temperature-resistant rubber, for use in hydraulic actuating cylinders using road vehicle non-petroleum base hydraulic brake fluid conforming to the requirements of ISO4925.