The Husqvarna 573978301 Lawn Mower Hydro Pump Belt helps maintain efficient operation of the mower’s hydrostatic drive system. This replacement belt transfers power from the engine to the hydro pump, enabling controlled movement and consistent performance during mowing tasks. Built for proper fit and dependable it assists in reducing power loss while supporting steady drive engagement... https://www.wholetoolbox.com/husqvarna-573978301-lawn-mower-hydro-pump-belt