Eaton Hydraulic Motor

Eaton Hydraulic Motor

This is an Eaton 4633 series heavy-duty, fixed displacement piston motor, specifically model 4633-094. It is engineered for high-pressure, high-flow hydraulic systems in mobile applications, primarily serving as the drum drive motor on concrete mixer trucks. Because it is a fixed displacement motor without an integrated pressure relief valve (HPRV), it provides consistent, reliable rotational speed essential for mixing and transporting concrete. This motor is a crucial component for maintaining drum rotation and is a direct replacement for worn or failed motors on various front discharge mixers.

Key Features

• Fixed displacement design for consistent output speed
• Heavy-duty cast iron construction for durability in demanding applications
• Engineered specifically for concrete mixer drum drive systems
• Does not include an integrated Hydraulic Pressure Relief Valve (HPRV)
• Advanced cylinder barrel design permits high speed and pressure

Fits These Mixers

McNeilus, Terex, Con-Tech. Fits various front discharge concrete mixers. Specifically listed as a replacement part for Oshkosh S-Series trucks. The 4.6 in³ displacement motor is also specified in Terex Advance parts manuals, making this a likely fit for Terex front discharge mixers requiring an Eaton 4.6 motor. Generally compatible with transit mixer applications requiring a 4600 series fixed hydraulic motor for drum rotation.

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.