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. Fits: - Lazer AS S/N 720,000 & Up - Lazer Z AC S/N 510,000 & Up - Lazer Z AS S/N 510,000 & Up - Lazer Z LC S/N 510,000 & Up - Toro: Z500 Z Master, 2004 and Newer, with 60" & 72" Decks - Also Fits Any Models that use PJ-BGAB-EY1X-XXXX or PK-BGAB-EY1X-XXXX Hydro Pumps. For Some Models, This Pump Will Only Replace One (1) of the Pumps on the Unit.