Four Seasons 77394 A/C Compressor

Reliable A/C Compressor for Mercedes-Benz Models

The Four Seasons Reman Compressor 77394 is designed to restore efficient air conditioning performance in select Mercedes-Benz vehicles. Engineered for compatibility with R134a refrigerant, this remanufactured A/C compressor meets the specific needs of models like the 300SD, 300SE, 400SE, 400SEL, 500SEL, CL600, S320, and S600.

• Compatible with R134a refrigerant and PAG 46 oil
• Includes oil and clutch assembly for complete replacement
• Equipped with a 6-groove serpentine pulley for proper belt fit
• Features a 12-volt coil with a 1-wire lead coil clock position
• Incorporates an RPM sensor switch for accurate compressor control
• Designed with tangent mount and pad mount suction and discharge ports
• Remanufactured Nippondenso 10pa20c compressor type

Four Seasons Reman Compressor Product Line

The Reman Compressor line by Four Seasons offers remanufactured A/C compressors that provide a cost-effective alternative to new units while maintaining OEM specifications. This product line focuses on restoring core compressor components, including the clutch and coil, ensuring reliable operation and compatibility with original vehicle systems. The 77394 model exemplifies this approach, delivering a remanufactured compressor tailored for Mercedes-Benz applications.

Detailed Product Description and Specifications

This Four Seasons A/C compressor (part number 77394) is designed specifically for Mercedes-Benz vehicles requiring a Nippondenso 10pa20c compressor type. It operates with R134a refrigerant and uses PAG 46 compatible oil, which is included in the unit. The compressor features a 6-groove serpentine pulley with a diameter of approximately 104.14 mm (4.09375 inches), matching the original equipment specifications. The clutch assembly is included and has a maximum diameter of 4.09375 inches, ensuring proper engagement and performance.

The unit is equipped with an RPM sensor switch and a lead wire terminal type for electrical connections. It mounts using a tangent mount style with a mounting distance of 15.24 mm (0.59375 inches) from clutch to mounting flange. Both suction and discharge ports are pad mount types, designed for secure and leak-free connections. Note that mounting hardware is not included, and installation may require the use of the original equipment manifold gasket (O-ring 24156).

Common Applications and Problem Resolution

• Restores A/C cooling performance in Mercedes-Benz 300SD, 300SE, 400SE, 400SEL, 500SEL, CL600, S320, and S600 models
• Replaces failing or noisy compressors with worn clutches or coils
• Addresses refrigerant leaks from compressor seals or ports
• Solves issues related to compressor clutch engagement failure
• Improves system reliability by replacing remanufactured core components

Installation Notes and Tips

• Verify compatibility with your specific Mercedes-Benz model and engine configuration
• Use the original equipment manifold gasket (O-ring 24156) during installation to ensure proper sealing
• Check the serpentine belt condition and replace if worn to maintain proper pulley operation
• Ensure electrical connections match the lead wire terminal type and RPM sensor switch
• Mounting hardware is not included; retain or source OEM mounting bolts for installation

Quality Assurance and Warranty Information

The Four Seasons Reman Compressor 77394 undergoes thorough remanufacturing processes to meet or exceed OEM standards. Each unit is oil-filled and tested for proper operation before shipment. While specific warranty details are not provided here, Four Seasons typically offers limited warranties on remanufactured compressors to cover defects in materials and workmanship. Consult product documentation or supplier information for exact warranty terms.