Safety Slide Lock Tractor Yoke New Tractor Yoke with Safety Slide Lock. 1-3/8" 6 Spline yoke. Rated 87 hp @ 540 rpm. 165 hp at 1,000 rpm. Replaces Neapco No. 44-4406.87 HP @ 540 RPM. 165 HP @ 1000 RPM.    Bore: 1 3/8" - 6 spline    Replaces: Neapco Part No: 44-4406 Domestic 44 Series
