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Description
21544005 – Hydro-Gear O-Ring (Replaces Hydro-Gear 52250) Genuine OEM Seal
The Hydro-Gear 21544005 O-Ring is a genuine OEM replacement sealing ring designed to provide a leak-proof seal in compatible Hydro-Gear hydrostatic transmissions, transaxles, and hydraulic drive systems. Replacing the previous Hydro-Gear part number 52250, this precision-manufactured O-ring helps maintain proper hydraulic pressure, prevents fluid leaks, and protects internal transmission components from contamination.
Manufactured from high-quality oil-resistant elastomer, the 21544005 O-Ring is engineered to withstand hydraulic fluid, heat, pressure, and continuous operation in demanding commercial and residential mowing applications. Installing a genuine Hydro-Gear OEM seal helps ensure reliable transmission performance and extends the service life of your hydrostatic drive system.
Product Details
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Part Number: 21544005
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Replaces: Hydro-Gear 52250
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Brand: Hydro-Gear
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Part Type: O-Ring
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Function: Seals hydraulic components to prevent fluid leaks
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Material: Oil-Resistant Nitrile Rubber (OEM Specification)
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Installation: Direct OEM Replacement
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OEM Status: Genuine Hydro-Gear OEM Part
Key Features
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Genuine Hydro-Gear OEM O-ring
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Replaces OEM part number 52250
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Provides a reliable hydraulic seal
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Resistant to hydraulic oil, heat, and pressure
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Helps prevent fluid leaks and contamination
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Maintains proper hydraulic system pressure
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Precision-manufactured for OEM fit
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Direct replacement with no modifications required
Function
The 21544005 O-Ring creates a tight seal between hydraulic components, preventing oil leakage while maintaining the pressure required for efficient hydrostatic transmission operation. A properly functioning O-ring helps protect internal components, reduce maintenance, and ensure smooth equipment performance.
Compatible Equipment
The Hydro-Gear 21544005 O-Ring is used in selected Hydro-Gear hydrostatic transmissions and transaxles found on equipment from manufacturers including:
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SCAG
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Toro
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Exmark
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Wright
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Ariens
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Gravely
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Ferris
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Hustler
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Bad Boy
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Bobcat
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Cub Cadet
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Dixie Chopper
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Spartan
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Other outdoor power equipment utilizing compatible Hydro-Gear transmissions
Always verify your Hydro-Gear transmission model, service manual, and OEM part number before ordering to ensure proper compatibility.
Who Is This For?
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Commercial landscapers
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Lawn care professionals
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Equipment repair technicians
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Fleet maintenance departments
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Homeowners maintaining hydrostatic mowers
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Hydro-Gear transmission service professionals
Recommended Applications
Ideal for:
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Hydrostatic transmission repairs
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Hydraulic leak repairs
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Transmission rebuilds
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Preventive maintenance
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Seal replacement
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Hydraulic system servicing
Pros
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Genuine Hydro-Gear OEM quality
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Direct replacement for Hydro-Gear 52250
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Excellent resistance to hydraulic fluid and heat
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Helps prevent leaks and pressure loss
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Precision OEM fit
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Long service life
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Easy installation
Cons
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Compatible only with specified Hydro-Gear applications
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O-ring should be lubricated with clean hydraulic oil during installation to prevent damage
Comparison – Hydro-Gear 21544005 OEM O-Ring vs Aftermarket O-Rings
Hydro-Gear 21544005 Genuine OEM O-Ring
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Exact OEM dimensions
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Premium oil-resistant elastomer
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Superior sealing performance
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Designed specifically for Hydro-Gear transmissions
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Long-lasting durability
Aftermarket O-Rings
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May vary in dimensions and material quality
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Variable resistance to hydraulic fluids
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Potential sealing inconsistencies
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Shorter service life
Why Buy from Barry's Power Equipment?
Barry's Power Equipment supplies genuine Hydro-Gear OEM replacement parts trusted by commercial landscapers, equipment dealers, and professional repair technicians.
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Genuine OEM Hydro-Gear replacement parts
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Fast nationwide shipping
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Competitive pricing
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Expert technical support
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Extensive inventory for Hydro-Gear, SCAG, Toro, Exmark, Wright, Ariens, Gravely, Ferris, Hustler, Kawasaki, Kohler, Honda, Briggs & Stratton, Cub Cadet, John Deere, STIHL, and many other leading outdoor power equipment brands.
