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Description
273936 – Hydro-Gear Roll Pin .125" (Genuine OEM Spring Pin)
The Hydro-Gear 273936 Roll Pin (.125") is a genuine OEM replacement spring pin engineered to securely align and retain internal components within compatible Hydro-Gear hydrostatic transmissions, transaxles, and hydraulic pumps. Manufactured to Hydro-Gear's exact engineering specifications, this precision-machined roll pin provides a strong, vibration-resistant fastening solution while maintaining proper alignment of shafts, levers, gears, and other critical transmission components.
Constructed from hardened spring steel, the 273936 delivers excellent strength, durability, and resistance to deformation, making it ideal for demanding commercial mowing and hydraulic drive applications.
Product Details
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Part Number: 273936
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Brand: Hydro-Gear
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Part Type: Roll Pin / Spring Pin
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Pin Diameter: .125 Inch (1/8")
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Material: Heat-Treated Spring Steel
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Function: Secures and aligns internal transmission components
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Installation: Direct OEM Replacement
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Genuine Hydro-Gear OEM Part
Key Features
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Genuine Hydro-Gear OEM roll pin
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Precision-manufactured to factory specifications
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1/8-inch (.125") diameter
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Heat-treated spring steel construction
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Excellent resistance to vibration and loosening
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Provides secure alignment of transmission components
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Direct replacement with no modifications required
Function
The Hydro-Gear 273936 Roll Pin is used to secure and align rotating or stationary components inside compatible hydrostatic transmissions and hydraulic pumps. Its spring-steel design allows it to compress during installation and expand into place, providing a secure mechanical connection that withstands continuous vibration and heavy-duty operation.
Compatible Equipment
The 273936 Roll Pin is used in numerous compatible Hydro-Gear hydrostatic transmissions and hydraulic systems commonly installed on:
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Commercial zero-turn mowers
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Residential zero-turn mowers
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Stand-on mowers
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Commercial turf maintenance equipment
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Professional grounds maintenance equipment
Hydro-Gear transmissions are widely used by manufacturers including:
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Ariens
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Gravely
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Scag
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Toro
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Exmark
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Ferris
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Hustler
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Wright
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Bad Boy
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Bob-Cat
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Spartan
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Cub Cadet
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And many other outdoor power equipment brands
Always verify your Hydro-Gear transmission model and illustrated parts diagram before ordering to ensure compatibility.
Who Is This For?
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Commercial landscapers
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Outdoor power equipment repair technicians
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Hydraulic transmission specialists
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Equipment fleet managers
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Professional service centers
Recommended Property Size
Ideal for equipment maintaining:
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Residential lawns
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Large estates
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Commercial landscaping operations
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Golf courses
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Municipal parks
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Sports complexes
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Industrial facilities
Pros
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Genuine Hydro-Gear OEM quality
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Precision 1/8-inch (.125") dimensions
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Heat-treated spring steel construction
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Excellent vibration resistance
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Secure component retention
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Long service life
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Direct OEM replacement
Cons
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Fits only compatible Hydro-Gear transmission applications
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Proper installation tools should be used to avoid damaging the pin or surrounding components
Comparison – Hydro-Gear 273936 vs Aftermarket Roll Pins
Hydro-Gear 273936 OEM Roll Pin
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Genuine OEM specifications
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Precision-manufactured dimensions
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Heat-treated spring steel
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Excellent retention strength
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Designed specifically for Hydro-Gear assemblies
Aftermarket Replacement Roll Pins
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May vary in diameter tolerance
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Variable material quality
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Reduced holding strength
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Potential fitment and durability issues
Why Buy from Barry's Power Equipment?
Barry's Power Equipment supplies genuine Hydro-Gear OEM transmission components 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, Ariens, Gravely, Scag, Toro, Exmark, Ferris, Hustler, Cub Cadet, Honda, Kawasaki, Kohler, STIHL, and many other leading outdoor power equipment brands.

