Vermeer 2800 rake surging

I have a Vermeer 2800 twin rake. Whenever it runs, the hydraulic motors that run each basket will surge, every few seconds or so. There is a hydraulic block where the hydraulic lines run thru, and there is a relief valve installed into it as well. When it is surging, you can hear the relief bypassing some oil. I am running this rake with a Magnum 210, so it should be putting out enough flow. I am assuming It has something to do with the pressure and flow compensation built into the tractor, but I’m not sure. This is the second tractor we have had the rake on, and the same results every time. Any help would be appreciated.

Vermeer 2800 rake surging