This is the same pump that is on the machine when it comes off the assembly line. For proper ordering, reference Hydro Gear part number stamped on hydro pump. When ordering and replacing a hydro pump, it is always best to 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.
Exmark: Lazer Z Serial No. 370,000 and newer; 52", 60" and 72" decks - Hydro Gear: BDP-10A Series - Toro: Z 250's Z Master 742XX Series, 52", 62" & 72" decks - Toro: Z 500's Z Master, 2004 & Newer Hydraulic Group, 60" & 72" decks.