Fit For JOHN DEERE 850 950 1050 11CC. Heavy-Duty Hydraulic Pump CH13990 for John Deere 850 950 1050 Tractors Fix Leaks & Power Loss - Direct Replacement for Aging Tractors! Heavy-Duty Hydraulic Pump CH13990 Compatible For John Deere 1050 & 11CC. Pump leaks after a season?? Precision-machined seals resist wear, even under heavy loads. Exact clockwise rotation matches for John Deere 850/950/1050/11CC. Optimized flow design restores lift and loader performance. Corrosion-resistant casting survives rain, mud, and winters. Why This Pump Stands Out. Guaranteed Compatibility: ...