Concentric 4F652 / 1002499 4 GPM SAE 4-Bolt Cast Iron Hydraulic Gear Pump

The Concentric (Rockford Inc.) 4F652 (OEM part 1002499) is a new, single-stage external gear hydraulic pump built with a durable cast iron body for demanding mobile and industrial hydraulic applications. It delivers a maximum flow rate of 4 GPM and mounts via a 4-bolt SAE "4F17" flange with a keyed shaft, as visible in the front-face photo showing the square 4-bolt SAE A-mount pattern. The unit is bi-directional capable as a fluid motor (confirmed by the included instruction sheet, which states remaining models beyond 4F649/4F650/4F651 can be used as bi-rotational pumps and/or fluid motors), and features an external fixed-displacement gear design with an integrated pressure relief valve (visible as the red-capped hex adjustment screw on the side port face). Shipped new-in-box with mounting gasket, three mounting bolts, and bilingual (English/Spanish) instruction sheet; port plugs and shaft protector are installed for storage. Typical applications include log splitters, dump trailers, skid steers, agricultural equipment, and other hydraulic power unit (HPU) systems requiring a compact, robust gear pump.

Product Specifications