POA. Progressive's Tri-Deck Roller mower (TDR-15) is the correct choice of wide area mowers for municipal grounds care, playing fields, parks, sports facilities, polo fields and sod production. Cutting Width: 4.7 meters (15Â½ Feet) Recommended HP: 30 Min. - 50 Max. Hydraulics: Requires 1 double acting outlet, all hoses supplied to tractor Deck Drive: PTO shaft to right angle gear box driving 2 - "B" section belts to 3 heavy duty spindles. Belt Adjustment: Easily made by loosening four bolts at slide plate base and adjusting the slide plate forwards or backwards and re-tightening.