O"" Ring - Buna

O"" Ring - Buna

This is a Buna-N (Nitrile) O-ring, manufactured to the AS568-012 standard size. It is specifically used as a replacement seal for the base of hydraulic directional control valves found on a wide range of concrete mixer trucks. Replacing this O-ring is a critical maintenance task to prevent hydraulic fluid leaks, which can lead to a loss of system pressure, component failure, and potential environmental contamination. The Buna-N material provides excellent resistance to petroleum-based oils and fuels, ensuring a durable and long-lasting seal in demanding hydraulic environments.

Key Features

• Made from high-quality Buna-N (Nitrile) rubber for excellent chemical resistance.
• Resistant to petroleum-based hydraulic fluids, oils, and hydrocarbon fuels.
• Standardized AS568-012 size ensures a precise fit.
• Forms a reliable seal at the base of directional control valves to prevent leaks.
• Suitable for a wide operating temperature range, typically -40°F to +250°F.

Fits These Mixers

McNeilus, Terex, Con-Tech. Fits the base of hydraulic directional control valves used on various general concrete mixer applications, including models from McNeilus, Terex, and Con-Tech. It is a common seal for hydraulic manifold and valve assemblies.

All measurements ± standard manufacturing tolerance.

Product descriptions are drafted with automated tools and reviewed as time allows. While we work to keep them accurate, specifications and fitment should be confirmed with a Customer Service specialist at 800-745-3414 before purchase. Found an error? Let us know and we’ll fix it.