Wheel Motor Heavy-duty bearings, High starting torque, When ordering and replacing a hydro pump, always replace the wheel motor and lines, flush the tanks and install a new oil filter. Not doing so could cause the hydro pump to fail due to contamination in the system., Direct drive so no gears required, High volumetric efficiency. Fits Models: Exmark 52" and 60" Turf Tracer floating deck walk-behind (190,000 and newer, without ECS); Viking Hydro Serial No. 90,000-130,000; Turf Tracer Hydro Serial No. 70,000-129,000; 36", 48" and 52" Turf Tracer HP Serial No. 150,000-260,000 Replaces Part Numbers: Parker TE0230FS250AAFA, Exmark 1-603718 Stens Part Number: 025-515