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ISO 7633:1985

Road vehicles — Elastomeric boots for drum type hydraulic brake wheel cylinders using a petroleum base hydraulic brake fluid (service temperature 120 degrees C max.)

Publication date:   Jul 25, 1985

General information

90.60   Close of review   Sep 3, 2026

ISO

ISO/TC 22/SC 33 Vehicle dynamics and chassis components

International Standard

43.040.40   Braking systems | 83.140.50   Seals

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Scope

Specifies performance tests for moulded rubber boots used as end closures on drum type brake cylinders. These boots prevent the entrance of dirt and moisture which could cause corrosion and otherwise impair wheel brake operation. Applies to boots of both plain and reinforcement insert types. Requirements relating to chemical composition, tensile strength or elongation at break of the rubber compound are not included.

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PUBLISHED
ISO 7633:1985
90.60 Close of review
Sep 3, 2026