GC9000 Series Concentric/HALDEX GC9000 Gear Pump

Same pump. The catalog number is C1AK18 and it carries the Concentric Rockford name, which lines up directly with the GC9000 Series used in their DC power unit kit assemblies. If you're sourcing a replacement for one of those units, this is the right part to be looking at.

Yes, this GC9000 series pump is a direct replacement for the Concentric Rockford C1AK18, as indicated by the catalog number. It's specifically designed for Concentric GC9000 Series Power Unit Kits.

At its core, it is a gear pump meant for efficient hydraulic fluid transfer, commonly used as a component inside power unit assemblies where you need steady, smooth flow.