Four Seasons 78402 A/C Compressor

Overview of Four Seasons New Compressor 78402

The Four Seasons New Compressor 78402 is designed specifically for Mitsubishi vehicles, including the Eclipse, Galant, and Montero Sport models. This A/C compressor is engineered to work with R134a refrigerant and comes fully equipped with essential components for reliable HVAC system performance.

• Compatible with Mitsubishi Eclipse, Galant, and Montero Sport
• Refrigerant type: R134a
• Includes clutch and heat switch
• Oil filled with PAG 46 compatible refrigerant oil
• 12-volt coil with 1 wire lead
• Serpentine pulley with 4 grooves
• Tangent mount type with precise mounting dimensions
• O-ring sealed suction and discharge ports

Features and Specifications

This Four Seasons New Compressor 78402 features a MSC90C compressor type designed for efficient air conditioning operation. It includes a clutch with a maximum diameter of 3.8125 inches and a pulley lip and ridge diameter of the same size, ensuring proper belt alignment. The pulley is designed for serpentine belts with four grooves, providing compatibility with factory belt systems. The compressor is oil filled with PAG 46 oil, which is compatible with R134a refrigerant systems. It also includes a heat switch and a pin-type terminal for electrical connections. The mounting type is tangent mount with a distance from clutch to mounting flange of approximately 2.7 inches (68.58 mm), allowing for precise fitment in the specified Mitsubishi models.

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 OEM specifications. This product line focuses on delivering reliable HVAC performance with included components such as clutches and switches to simplify installation. The New Compressor 78402 is part of this line, providing a complete solution for Mitsubishi vehicles requiring a new A/C compressor.

Common Applications and Problem Resolution

• Restores A/C cooling performance in Mitsubishi Eclipse, Galant, and Montero Sport
• Replaces worn or seized compressors causing insufficient refrigerant compression
• Solves clutch engagement issues with included clutch and heat switch
• Addresses refrigerant leaks with O-ring sealed suction and discharge ports
• Eliminates noise or vibration caused by damaged pulleys or internal compressor components

Installation Notes and Tips

Installation requires removal of the old compressor and proper handling of refrigerant lines. Note that mounting hardware is not included and must be reused or sourced separately. Ensure the system is evacuated and recharged with R134a refrigerant and PAG 46 oil as specified. Verify electrical connections match the pin terminal and 12-volt coil requirements. Proper belt tension and alignment with the serpentine pulley grooves are essential for optimal operation.

Quality Assurance and Warranty

The Four Seasons New Compressor 78402 is a new, factory-quality replacement part designed to meet OEM standards. It includes essential components such as the clutch and heat switch to ensure compatibility and ease of installation. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.