Hydro-Gear 2513031 BDP Hydraulic Pump Bypass Valve Kit

The Hydro-Gear 2513031 is a genuine OEM bypass valve kit designed for use in Hydro-Gear BDP-series hydrostatic pumps found on riding mowers, zero-turn mowers, and other outdoor power equipment. Also commonly referred to as a freewheel valve or dump valve, the bypass valve opens a fluid path to bypass the pump or motor, allowing the unit to be manually moved when the engine is not running.

This kit provides all necessary components to restore proper bypass valve function within the BDP pump assembly. Maintaining a properly functioning bypass valve is essential to protecting the hydraulic drive system from pressure buildup and ensuring smooth, reliable operation of the transmission.

Key Features:

• Genuine Hydro-Gear OEM replacement part — ensures correct fit and function
• Designed for Hydro-Gear BDP-series hydrostatic pump platforms including BDP-10L, BDP-16A, and BDP-21L variants
• Restores proper hydraulic bypass (freewheel/dump) function to the drive system
• Helps prevent hydraulic pressure buildup that can cause damage to drive components
• Precision-engineered for long service life under demanding conditions
• Direct OEM replacement — no modifications required

Replacing a worn or failed bypass valve kit promptly helps prevent costly drivetrain damage and keeps your equipment operating at peak efficiency. Always refer to your equipment's parts diagram or service manual to confirm fitment for your specific BDP pump model configuration.