Eaton Hydraulic Pump

Eaton Hydraulic Pump

This is an Eaton 5421-250 variable displacement hydraulic pump, a critical component for controlling the drum rotation on concrete mixer trucks. Engineered for heavy-duty use, it operates in a counter-clockwise (CCW/Left Hand) direction and features a dual-element charge pump for reliable performance in hydrostatic systems. A replacement is necessary when the existing pump fails to maintain consistent hydraulic pressure, leading to erratic drum speed or complete loss of function. This model includes a manual control and a built-in high-pressure relief valve (HPRV) factory set to 6000 PSI for system protection.

Key Features

• Counter-clockwise (CCW) / Left Hand (LH) rotation.
• Dual Element (DE) charge pump design for hydrostatic systems.
• Integrated High-Pressure Relief Valve (HPRV) set at 6000 PSI.
• Features a 1-3/8 inch tapered input shaft.
• Equipped with a manual control valve.
• Designed for the demanding environment of concrete mixer trucks.

Fits These Mixers

McNeilus, Terex, Con-Tech. This pump is a general hydraulic component for concrete mixers, including rear discharge and front discharge models. It is specifically identified as a fit for systems requiring a Left Hand (Counter-Clockwise), dual-element Eaton pump, commonly used by manufacturers such as 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.