O" Ring - Buna

O" Ring - Buna

This is a replacement Buna-N servo O-ring, identified by the Eaton/Danfoss part number 8761-237. It is specifically designed as a valve replacement part for the servo assembly on Eaton 46 and 54 series hydrostatic pumps. Made from Buna-N (Nitrile) rubber with a 70 durometer hardness, it provides excellent resistance to petroleum-based hydraulic fluids, oils, and water, ensuring a reliable seal. This O-ring is a critical component for servicing and preventing leaks in the hydraulic pump's control system, which is common on concrete mixers and other heavy equipment.

Key Features

• Direct replacement for Eaton/Danfoss part number 8761-237.
• Designed as a servo O-ring for Eaton 46 and 54 series hydrostatic pumps.
• Made from Buna-N (Nitrile) rubber for excellent resistance to hydraulic oil and petroleum products.
• Standard 70 durometer hardness for optimal sealing in hydraulic applications.
• Prevents fluid leaks in hydraulic pump control valve assemblies.

Fits These Mixers

McNeilus, Terex, Con-Tech. Fits the servo control valve assembly on Eaton 46 and 54 series hydrostatic pumps, which are widely used in the hydraulic systems of concrete mixer trucks from various manufacturers, including McNeilus, Terex, and Con-Tech.

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.