55995 – Hydro-Gear Fitting Assembly 9/16-18 (OEM-Spec)
The Hydro-Gear 55995 Assembly, Fitting 9/16-18 is a genuine OEM-spec hydraulic fitting engineered to provide a secure, leak-resistant connection in Hydro-Gear hydrostatic transmission, pump, or hose systems. Precisely manufactured to Hydro-Gear’s specifications, this fitting assembly features standard 9/16-18 thread size for proper mating with compatible ports and hose ends. Built for demanding turf and drive applications, the 55995 fitting ensures dependable hydraulic sealing, consistent fluid flow, and long-lasting performance in harsh operating environments.
Product Details
Manufacturer Part Number: 55995
Brand: Hydro-Gear (OEM-Spec)
Part Type: Hydraulic Fitting Assembly
Thread Size: 9/16-18
Function: Connects hydraulic lines, hoses, or components securely
Application: Hydro-Gear hydrostatic drives, pumps, and hydraulic circuits
Material: Durably machined metal (hydraulic grade)
Construction: Precision threaded fitting with sealing surfaces
OEM Status: Genuine Hydro-Gear replacement part
Function
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Provides secure hydraulic fluid connection with minimal leakage
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Ensures proper thread engagement using standard 9/16-18 sizing
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Maintains consistent fluid flow and system pressure
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Helps prevent leakage under high hydraulic load and vibration
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Supports durability and leak-free performance in turf equipment
Compatible With
The Hydro-Gear 55995 Fitting Assembly is used in select Hydro-Gear hydraulic applications, including:
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Hydro-Gear hydrostatic transmissions and pump systems
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Hydraulic circuits requiring a 9/16-18 threaded fitting connection
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OEM parts breakdowns and repair kits listing fitting assembly 55995
Note: Always verify compatibility by checking your specific Hydro-Gear component model and associated hydraulic part number references before ordering.
How It’s Used
This hydraulic fitting assembly installs inline with hoses or ports requiring a 9/16-18 threaded connection:
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Prepare: Relieve system pressure and clean the hydraulic area.
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Remove Old Fitting: Unscrew the worn or damaged fitting using proper wrenches.
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Inspect Threads: Check hose ends and port threads for wear or damage.
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Apply Sealant (if required): Use proper hydraulic thread sealant per service instructions.
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Install New Fitting: Thread the Hydro-Gear 55995 fitting assembly into place, tightening to the specified torque.
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Reconnect Hoses: Attach mating hose ends or hydraulic components securely.
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Test System: Re-pressurize and operate to check for leaks and correct performance.
Proper sealing and torque are essential to prevent leaks and maintain system integrity.
Suggested Maintenance
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Inspect hydraulic fittings regularly for signs of leakage
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Check for thread wear or corrosion on fittings and mating connections
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Replace immediately if leaks or damage are detected
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Use OEM-spec fittings to ensure correct thread form and performance
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Keep the hydraulic system clean to prevent contaminants from damaging seals
The Hydro-Gear 55995 Assembly, Fitting 9/16-18 is a dependable OEM-spec hydraulic connection solution designed to deliver secure sealing, maintain fluid integrity, and support long-lasting performance in compatible Hydro-Gear hydraulic systems.


