TM10-3930-660-34 Figure C-10 Hydraulic Piston Pump - Shaft Seal Driver WARNING Wear eye shields and protective gloves when fabricating this tool. Flying metal particles and heated metal may cause serious personal injury. Machine installation tool from heavy wall steel tubing and aluminum bar stock per the dimensions on sketch.  All surfaces are to be smooth and flat.  Radius or chamfer all sharp edges. C-10