Four Seasons 77300 A/C Compressor

Reliable A/C Compressor for Mercedes-Benz 400SE, 400SEL, 500SEL

The Four Seasons Reman Compressor 77300 is designed to restore your vehicle's air conditioning system performance. Engineered for select Mercedes-Benz models, this remanufactured A/C compressor ensures compatibility and efficient operation with R134a refrigerant.

• Compatible with Mercedes-Benz 400SE, 400SEL, and 500SEL models
• Remanufactured Four Seasons Reman Compressor line, part number 77300
• Designed for R134a refrigerant and Pag 46 oil type
• Includes oil fill and clutch assembly for complete replacement
• Features an 8-groove serpentine pulley with 12V coil voltage
• Equipped with an RPM sensor switch and pin-type terminal
• Tangent mount style with pad mount suction and discharge ports

Product Details and Specifications

This Four Seasons Reman Compressor 77300 is a remanufactured Nippondenso 10pa20c type compressor tailored for Mercedes-Benz 400SE, 400SEL, and 500SEL vehicles. It operates with R134a refrigerant and is compatible with Pag 46 refrigerant oil, which is included. The compressor features an 8-groove serpentine pulley with a diameter of approximately 4.75 inches (120.65 mm), designed for smooth belt engagement. The clutch assembly is included, with a maximum diameter of 4.75 inches and a coil voltage of 12 volts, utilizing a single wire lead coil clock position. The unit incorporates an RPM sensor switch with a pin-type terminal connection for reliable electrical interfacing.

The mounting style is tangent mount with a 15.24 mm mount distance, and both suction and discharge ports use pad mount types. The discharge port includes a compressor manifold port gasket (O-ring 24156) to ensure a proper seal. Note that mounting hardware is not included, and installation may require the use of the original equipment manifold.

Four Seasons Reman Compressor Product Line

The Four Seasons Reman Compressor line offers remanufactured A/C compressors that meet strict quality standards to restore factory performance. These compressors undergo thorough inspection and reconditioning, including replacement of wear components and testing to ensure reliability. The Reman Compressor 77300 is part of this line, providing a cost-effective solution for Mercedes-Benz owners seeking to maintain their vehicle’s air conditioning system with OEM-level compatibility.

Common Applications and Problem Resolution

• Restores cooling performance in Mercedes-Benz 400SE, 400SEL, and 500SEL A/C systems
• Replaces compressors with worn or damaged clutches or pulleys
• Addresses refrigerant leaks related to compressor seals or gaskets
• Solves issues with compressor engagement due to faulty RPM sensors
• Eliminates noise or vibration caused by compressor internal wear

Installation Notes and Tips

• Verify compatibility with your specific Mercedes-Benz model and year before installation
• Use the original equipment manifold as recommended for proper fitment
• Ensure the system is evacuated and recharged with R134a refrigerant and Pag 46 oil
• Check belt alignment and tension on the 8-groove serpentine pulley
• Inspect electrical connections for the pin-type terminal and RPM sensor switch

Quality Assurance and Warranty

The Four Seasons Reman Compressor 77300 is remanufactured to meet or exceed OEM specifications. It includes oil and clutch assembly to facilitate a complete replacement. While mounting hardware is not included, the compressor is tested for performance and durability. Please consult product documentation or Four Seasons for specific warranty details applicable to this remanufactured part.