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2674A838 GT2556S Turbocharger Replacement for Perkins 4.4L
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768524-0021 785827-0021This aftermarket replacement turbocharger 2674A838 (GT2556S) is designed for Perkins 4.4L agricultural tractors. It serves as an aftermarket replacement application for units referencing OEM numbers 768524-0021 and 785827-0021. Verify your engine model and existing turbo configuration before ordering to ensure proper fitment.
Key Specifications
This GT2556S turbocharger assembly is identified by part number 2674A838. It serves as a replacement application for units referencing OEM numbers 768524-0021 and 785827-0021. The unit is packed in a 21x23x26 cm carton with a gross weight of 8 kg. Verify the turbo model and housing configuration against your existing unit before ordering to ensure correct application.
Application & Compatibility
This unit is listed for Perkins 4.4L agricultural tractors as a replacement application. It references OEM numbers 768524-0021 and 785827-0021 for verification purposes. Buyers should confirm the engine model and existing turbo configuration before ordering. Fitment is not confirmed for all variants of this engine series. Verify your specific vehicle application and part number to ensure correct installation.
Technical Notes
The GT2556S model is a standard fixed-geometry turbocharger assembly. It relies on precise bearing clearances and shaft balance for stable operation under load. Inspect the compressor and turbine housings for cracks or heat distortion before installation. Ensure all mounting surfaces are clean and free of debris. Verify that the oil supply and return lines are unobstructed to prevent bearing failure. Check actuator related hardware movement for smooth operation. Confirm that the wastegate mechanism functions correctly to manage boost pressure. Proper installation requires torque specifications to be followed strictly.
B2B Supply
LeadTurbo supports B2B buyers with volume pricing for this 2674A838 GT2556S turbocharger. Worldwide shipping is available for agricultural machinery parts orders. Our team provides technical fitment support to help verify engine applications and OEM reference numbers. Contact us to confirm stock availability for part number 2674A838. We assist repair shops and distributors in identifying the correct replacement unit for Perkins 4.4L tractors. Ensure your order details match the supplied specifications before checkout.
Product FAQ
PERKINS and other product, brand and model names are the property of their respective owners and are used for reference and application-lookup only. LeadTurbo is not affiliated with or endorsed by PERKINS.
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Complete Turbo Units
Complete turbo units designed for rigorous heavy-duty use where OEM units may fall short.
CHRA / Core Assemblies
Brand-new compatible CHRA cores — like-new performance at a fraction of replacement cost.
Turbine Wheels & Shafts
Precision-balanced turbine shafts engineered from inside out for superior durability.
Turbine Housings
Silicon-molybdenum (Si-Mo) nodular cast iron — engineered for extreme heat resistance.
Compressor Housings
OEM-matched geometry and surface finish — advanced casting and machining for perfect fitment.
Bearing Housings
Rock-solid platform engineered for high-output rebuilds — the foundation for performance.
Compressor Wheels
Aluminum, stainless steel, or titanium alloys — precision machined for superior responsiveness.
