I assume they meant you need the Power Beyond option. Power Beyond provides a constant flow of fluid for use with implements that have their own valving like a back hoe. One other implement that typically has its own valve is a log splitter. There may be others but those are the two most common.I bought a cabbed 4052 and have ordered a back hoe for it. I was informed I needed a hydraulic rear unit too. I was wondering what other attachments/ implements can also be used with the hydraulic unit.