Thinking about an upgrade for your excavator's hydraulic system? In this detailed walkthrough, we examine the E320B/E325B hydraulic pump (part numbers 123-2233, 123-2229, A8VO107), showing you its internal components, assembly structure, and compatibility with CAT320B/320A models. Watch as we break down the pump's construction and discuss maintenance best practices to help you evaluate if this is the right fit for your equipment needs.