100 hp Tow-Behind Rock Picker

I need a robust tow-behind rock picker that my 100 hp tractor can handle comfortably in broadacre agricultural fields. The machine must reliably lift and collect medium-sized stones—roughly 3 in to 6 in diameter—without clogging or excessive wear, and it has to stay stable on a mix of flat paddocks and rolling rises.

Key functional expectations
• PTO or tractor-hydraulic drive sized for the 100 hp class
• Adjustable tine or reel system that scoops, separates soil, and drops rocks into a bin without excessive soil carry-over
• Ground-following frame or suspension so the picker tracks evenly across uneven terrain
• Simple, low-maintenance bearings, chains, and wear parts that a farm workshop can source locally
• Safe unload mechanism that tips or conveyors the collected load clear of the working area

Deliverables
• Full 3D CAD model and assembly (SolidWorks, Inventor, or comparable)
• Fabrication drawings (PDF + native DWG/DXF) with weld symbols, material call-outs, and critical tolerances
• Complete bill of materials with readily available components—hydraulic cylinders, bearings, sprockets, etc.
• Basic operating guide outlining hookup, flow/pressure requirements, and service intervals

I will review the drawings against my tractor dimensions, so please include overall transport width, hitch type, and estimated operating speed. If you have past farm-implement work or stress analyses, sharing a sample render or FEA screenshot with your proposal will help me choose quickly. I’m available to clarify field conditions, soil type, or any other details you need.

My tractor is a cat 2 hitch connection
You must have completed design projects for the agricultural industry in the past if previous project examples