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Description
51605 – Hydro-Gear Extension Return Spring (Genuine OEM Part)
The Hydro-Gear 51605 Extension Return Spring (EXTNSN RTN) is a genuine OEM tension spring designed for use in Hydro-Gear hydrostatic transmission control systems. This precision-engineered extension spring assists in returning the control linkage to the neutral position, ensuring smooth directional response and safe operation of zero-turn and riding mower equipment.
Manufactured to Hydro-Gear’s strict OEM standards, the 51605 return spring provides the correct tension strength and elasticity required for proper hydrostatic control function. Using a genuine Hydro-Gear spring ensures accurate neutral return, consistent drive performance, and long-term durability in demanding mowing environments.
Key Details:
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Manufacturer: Hydro-Gear
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Part Number: 51605
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Part Type: Extension Return Spring
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Function: Provides tension for hydrostatic control return mechanism
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Application: External transmission control linkage system
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Design: High-strength steel extension spring
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Installation: Direct OEM replacement
Compatibility:
The Hydro-Gear 51605 Extension Return Spring is commonly used in select Hydro-Gear hydrostatic transaxles installed in residential and commercial zero-turn mowers.
Typically found in transmission platforms such as:
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EZT (ZT-2200) Series
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ZT-2800 Series
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ZT-3100 Series
These Hydro-Gear transmission systems are widely used by equipment manufacturers including:
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Ariens
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Gravely
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Scag
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Husqvarna
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Cub Cadet
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Toro
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Exmark
The genuine Hydro-Gear 51605 return spring is essential for maintaining accurate neutral positioning, smooth control response, and reliable performance of Hydro-Gear hydrostatic drive systems.
