Gronvix Toro Z Master Pump Seal Kit – OEM 142-3604/116-1368

The Gronvix Hydro Pump Seal Kit is a direct OEM replacement for Toro Z Master series zero-turn mowers, designed to restore hydraulic pump performance and eliminate leaks. This kit replaces original part numbers 142-3604 and 116-1368 across the Toro Z Master 3000, 4000, 5000, and 6000 Series hydrostatic pumps, delivering factory-level sealing at a more economical cost. Built to withstand commercial-grade use, the kit includes all essential components—such as the main housing gasket, precision-cut oil seals, multiple O-rings (black and brown), backup washers, a retaining snap ring, and a complete sealing shims set—for a complete rebuild without additional purchases.

The kit’s high-quality oil-resistant rubber and fibre composite materials ensure reliable sealing under prolonged high-temperature conditions, reducing the risk of hydraulic oil leakage and maintaining consistent pump pressure. Precision die-cutting guarantees a tight fit with the sealing surface, while the direct replacement design requires no modifications—simplifying installation for routine maintenance or leak repairs. This makes it an ideal solution for landscaping teams, property managers, and rental fleets operating Toro Z Master mowers, addressing common issues like oil seepage and pressure loss.

Before purchasing, verify your mower’s model and pump part number to confirm compatibility. Each kit is designed for one side of the hydro pump, ensuring accurate fitment and performance. For best results, follow standard maintenance procedures and consult your mower’s manual if unsure about installation steps.