Hydraulicspneumatics Com Sites Hydraulicspneumatics com Files Uploads 2013 08 Eaton Series 620 Pump

Compact, yet powerful pump

Feb. 16, 2011
Designed for simplicity and high but quiet performance, Eaton’s Model ADY098 Series 620 open-circuit piston pumps for mobile equipment applications are only 11.4-in. long, weigh 91 lb, yet transmit 134 hp. The ...

Designed for simplicity and high but quiet performance, Eaton’s Model ADY098 Series 620 open-circuit piston pumps for mobile equipment applications are only 11.4-in. long, weigh 91 lb, yet transmit 134 hp. The small size makes them well suited to fit into the tighter confines of Tier IV engine compartments. The introductory pump has a maximum displacement of 98 cc/rev, with subsequent models to be sized at 65, 74, and 120 cc/rev.

Eaton Series 620 pump. Click image for larger view.

A tight swashplate angle of 15° contributes to the short overall envelope and improve speed response to the control. Lubrication channels in the swashplate bearing reduce friction and also increase responsiveness. A bi-metal valve plate reduces noise generation. The pump’s two-piece housing reduces leakage potential, while its interior ribs limit vibration and noise.

A check valve between the case and the inlet reduces pressure spikes. The pump’s control piston has a low-friction coating that increases responsiveness. High-load bearings and a stiff shaft extend the pump’s operating life to 13,600 hr at rated conditions.

Options include: load sensing, pressure compensation, cold-start valve, external manual stroke adjuster, and a variety of mounting and input shaft configurations.

Click here for more information on Eaton's Series 620 axial-piston pumps.

About the Author

Richard Schneider | Contributing Editor

Contributing Editor, has been affiliated with Hydraulics & Pneumatics for more than 30 years and served as chief editor from 1987 through 2000. He received a BSME from Cornell University and also completed additional courses at the Milwaukee School of Engineering. His diverse background in industry includes ten years with a fluid power distributor and a variety of other professional positions. He has also been active with the National Fluid Power Association and Fluid Power Society.

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