Four Seasons 4861NK A/C Compressor and Component Kit

Complete A/C Kit for Ram HD Trucks

Four Seasons 4861NK is a complete air conditioning kit for select Dodge Ram 2500 and Ram 3500 trucks with the SD7H15 compressor. It combines the major A/C service components needed for a full compressor replacement, including a new compressor, accumulator, liquid line with orifice, PAG oil, and O-rings.

Built for 1998-2002 Dodge Ram 2500 and Ram 3500 applications, this Four Seasons Complete A/C Kit is a direct-fit solution for restoring R134a system performance. The 4861NK kit is organized around the core parts most often replaced together during compressor service.

Key Features

• Four Seasons Complete A/C Kit, part number 4861NK
• Includes a new compressor, accumulator, liquid line with orifice, PAG oil, and O-rings
• Compressor oil included: PAG Oil /100
• Refrigerant type: R134a
• Receiver drier/accumulator features male springlock inlet and outlet fittings
• Accumulator dimensions: 3.500 in. diameter and 8.000 in. length
• Limited Lifetime warranty

Product Details

The Four Seasons Complete A/C Kit line is built for full-system service, bringing together the compressor and related replacement components in one package. Part number 4861NK is listed for Dodge Ram 2500 and Dodge Ram 3500 trucks equipped with the SD7H15 compressor, including 1998-1999 models with U4770 or U4775 compressor references and 2000-2002 models with SD7H15 compressor applications. This kit is intended for R134a systems and includes the specified PAG oil and sealing components needed for the repair.

This part cross-references 520317 for the same application.

Common Repair Uses

• Loss of cabin cooling after compressor failure
• Contaminated or worn A/C system components during compressor replacement
• Restricted refrigerant flow through the liquid line or orifice
• Leaks at seals, O-rings, or springlock connections
• Poor A/C performance in Dodge Ram 2500 and Ram 3500 trucks

Installation Notes and Tips

Verify compressor style and system configuration before installation. This kit is listed for trucks with the SD7H15 compressor, and 1998-1999 applications also reference U4770 and U4775 compressor numbers. Replace the accumulator and liquid line components during service, evacuate the system, and recharge with the correct R134a refrigerant and specified PAG oil amount for the vehicle.

Quality Assurance

Four Seasons 4861NK includes a Limited Lifetime warranty. The kit is assembled as a complete A/C service solution for confirmed Dodge Ram 2500 and Ram 3500 applications.