Heavy Duty Hydraulic Brush Cutter Gearbox RC-51H With 1:1.93 Ratio 1-1/4 Inch 14 Tooth Drive Hydraulic Motor Mount Replacement OEM 251390 Premium Quality Easy Install For Tough Clearing Jobs

Heavy Duty Hydraulic Brush Cutter Gearbox RC-51H 1:1.93 ✔️ 1:1.93 speed-up ratio, 1-1/4 in spline, 4-bolt mount, 1x pack

Replacement gearbox designed for heavy-duty skid steer rotary cutters. It uses a hydraulic motor mount, a 1:1.93 gear ratio, and a 1-1/4 inch input spline to handle tough clearing jobs.

✅ OEM Part Number 251390, RC51-H
✅ Gearbox with 1:1.93 gear ratio and hydraulic motor mount
✅ Internal 1-1/4 inch input spline, 2 inch 15 tapered output shaft
✅ Four-bolt mounting, 4-3/4 inch centers
✅ Includes blade carrier mounting nut and cotter pin
✅ Shipped dry, requires 80-90W gear lube or equivalent

💡 What is a hydraulic gearbox used for in cutting equipment? This handy device transfers power from hydraulic motor to the cutter head to drive blades efficiently.
- transfers torque from hydraulic motor to cutter shaft
- provides the gear ratio needed to match blade speed
- supports standard mounting patterns and lubrication needs
- helps extend gearbox life in tough clearing jobs