ISO 4928:2006 PDF

Road vehicles — Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (Service temperature 120 degrees C max.)

Open preview (PDF)

Title (English):

ISO 4928:2006

Road vehicles — Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (Service temperature 120 degrees C max.)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 15
Publication date:: July 13, 2006
Edition:: ISO IS 4928 edition 3 version 1
ICS:: 43.040.40

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

ISO 4928:2006 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. ISO 4928:2006 is applicable to moulded seals (cups or double-lipped type gland seals), 60 mm 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 ISO 4925.

Technical details

Technical committee: ISO/TC 22/SC 33 - Vehicle dynamics and chassis components
SKU: ISO 4928:2006

Abstract

Overview

ISO 4928:2006 defines performance test requirements for elastomeric cups and seals used in hydraulic braking systems of road vehicles when operated with a non‑petroleum base hydraulic brake fluid (service temperature up to 120 °C). The standard applies to moulded cups or double‑lipped gland seals up to 60 mm diameter made from high temperature‑resistant rubber. It specifies test methods and acceptance criteria but does not set requirements for chemical composition, tensile strength or elongation. Disc brake seals are excluded.

Key topics and technical requirements

Scope and exclusions: Applies to wheel‑ and master‑cylinder seals (≤ 60 mm); excludes disc brake seals and compound chemical composition requirements.
General requirements: Workmanship, marking (manufacturer ID and optional “ISO 4928”), packaging and sampling procedures.
Core performance tests:
- Resistance to fluid at elevated temperature (120 °C) - dimensional change, volume and hardness limits.
- Precipitation (sediment) limits after fluid exposure.
- Heat pressure stroking for wheel cylinder and master cylinder seals - lip diameter retention, leakage criteria, corrosion inspection, hardness change limits and surface condition (no excessive scoring, scuffing, blistering).
- Low‑temperature performance - leakage and bend test (no cracking; shape recovery).
- Oven ageing - hardness change limits and visual condition.
- Corrosion and storage corrosion tests - permissible corrosion mass changes and no jellying or excessive sediment in fluid‑water mixtures.
Test procedures & references: Dimensional, hardness and ageing test methods reference other ISO documents (e.g., ISO 48 for hardness, ISO 188 for oven ageing, ISO 4926 for reference fluids).

Applications and who uses it

ISO 4928 is used for:

Automotive OEMs and braking system designers for seal validation and component acceptance.
Brake system suppliers and elastomer manufacturers for product development, compound selection and quality control.
Testing laboratories performing certification, endurance and compatibility testing of seals with non‑petroleum brake fluids.
Procurement and aftermarket buyers who require traceable performance criteria in supplier specifications.

Benefits include improved reliability of brake actuators, reduced risk of fluid contamination or seal failure, and harmonized test criteria for global supply chains.

Related standards

ISO 4925 - Specification of non‑petroleum‑base brake fluids (fluid compatibility).
ISO 4926 - Non‑petroleum base reference fluids.
ISO 48 - Rubber hardness determination.
ISO 188 - Accelerated ageing and heat resistance tests.
ISO 1250 - Mineral solvents (referenced for cleaning/solvent use).

Keywords: ISO 4928, brake seals, elastomeric cups, hydraulic braking systems, non‑petroleum brake fluid, high temperature rubber seals, performance tests, wheel cylinder seals, master cylinder seals.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and exclusions: Applies to wheel‑ and master‑cylinder seals (≤ 60 mm); excludes disc brake seals and compound chemical composition requirements.
General requirements: Workmanship, marking (manufacturer ID and optional “ISO 4928”), packaging and sampling procedures.
Core performance tests:
- Resistance to fluid at elevated temperature (120 °C) - dimensional change, volume and hardness limits.
- Precipitation (sediment) limits after fluid exposure.
- Heat pressure stroking for wheel cylinder and master cylinder seals - lip diameter retention, leakage criteria, corrosion inspection, hardness change limits and surface condition (no excessive scoring, scuffing, blistering).
- Low‑temperature performance - leakage and bend test (no cracking; shape recovery).
- Oven ageing - hardness change limits and visual condition.
- Corrosion and storage corrosion tests - permissible corrosion mass changes and no jellying or excessive sediment in fluid‑water mixtures.
Test procedures & references: Dimensional, hardness and ageing test methods reference other ISO documents (e.g., ISO 48 for hardness, ISO 188 for oven ageing, ISO 4926 for reference fluids).

Applications and who uses it

ISO 4928 is used for:

Automotive OEMs and braking system designers for seal validation and component acceptance.
Brake system suppliers and elastomer manufacturers for product development, compound selection and quality control.
Testing laboratories performing certification, endurance and compatibility testing of seals with non‑petroleum brake fluids.
Procurement and aftermarket buyers who require traceable performance criteria in supplier specifications.

Benefits include improved reliability of brake actuators, reduced risk of fluid contamination or seal failure, and harmonized test criteria for global supply chains.

Related standards

ISO 4925 - Specification of non‑petroleum‑base brake fluids (fluid compatibility).
ISO 4926 - Non‑petroleum base reference fluids.
ISO 48 - Rubber hardness determination.
ISO 188 - Accelerated ageing and heat resistance tests.
ISO 1250 - Mineral solvents (referenced for cleaning/solvent use).

ISO 4928:2006 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Related standards

Road vehicles — Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum…

Milk. Determination of fat content. Gerber butyrometers

Water quality. Determination of selected phthalates using gas chromatography/mass spectrometry.

Road vehicles — Hydraulic brake systems — Non-petroleum base reference fluids

Road vehicles — Non-petroleum base brake fluid

Earth-moving machinery — Lighting, signalling and marking lights, and reflex-reflector devices