Four Seasons 78558 A/C Compressor

Overview of Four Seasons New Compressor 78558

The Four Seasons New Compressor 78558 is designed for reliable air conditioning performance in select Dodge vehicles. Engineered to meet OEM specifications, this A/C compressor supports efficient cooling with R134a refrigerant and includes essential components for a complete replacement.

• Compatible with Dodge Dakota, Durango, Ram 1500, and Ram 2500 models
• Designed for R134a refrigerant with Pag 100 oil compatibility
• Includes oil fill and clutch assembly for ready installation
• Features a 6-groove serpentine pulley and 12V coil voltage
• Equipped with a pressure relief valve switch and sealing washer discharge port

Features and Technical Specifications

This Four Seasons New Compressor 78558 is a Sanden/Sankyo type SD7H15 compressor, tailored for tangent mount installation. It includes a clutch with a maximum diameter of 5.125 inches and a pulley diameter of approximately 130 mm (5.125 inches), featuring six grooves for serpentine belt compatibility. The coil uses a single wire lead positioned at the 1 o'clock clock position, operating at 12 volts. The compressor comes pre-filled with Pag 100 oil and includes two slimline washer O-rings (part number 24404) for suction port sealing. The discharge port uses a sealing washer to ensure leak-free operation. Terminal connections are pin type for secure electrical engagement.

About the Four Seasons New Compressor Product Line

The Four Seasons New Compressor line offers brand-new, direct replacement compressors designed to meet or exceed original equipment standards. This product line focuses on delivering complete compressor assemblies that include clutch, coil, and oil fill, reducing installation time and ensuring compatibility. The 78558 model exemplifies this approach by providing a fully assembled unit compatible with specific Dodge trucks and SUVs.

Applications and Common Issues Addressed

• Replacement for failed or leaking A/C compressors in Dodge Dakota, Durango, Ram 1500, and Ram 2500
• Resolves insufficient cooling due to compressor clutch failure
• Addresses refrigerant leaks caused by worn seals or O-rings
• Fixes noisy or seized compressor units affecting A/C system performance
• Restores proper serpentine belt engagement with 6-groove pulley design

Installation Notes and Tips

• Ensure compatibility with vehicle model and year before installation
• Use proper torque specifications for tangent mount hardware (mounting hardware not included)
• Verify refrigerant type R134a and use Pag 100 oil as specified
• Inspect and replace O-rings and sealing washers to prevent leaks
• Check electrical connections for pin-type terminals and coil wiring

Quality Assurance and Warranty

The Four Seasons New Compressor 78558 is a new, not remanufactured, component designed to meet OEM quality standards. It includes a pressure relief valve switch to protect the system from overpressure conditions. While mounting hardware is not included, the compressor is supplied with all necessary internal components such as oil and clutch assembly. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.