Four Seasons 77561 A/C Compressor

Reliable A/C Compressor for Buick, Chevrolet, GMC, and More

The Four Seasons Reman Compressor 77561 is a remanufactured A/C compressor designed for select Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab models. Engineered to meet OEM specifications, this compressor supports R134a refrigerant and includes essential components for efficient air conditioning system performance.

• Compatible with R134a refrigerant and Pag 46 oil
• Includes clutch and heat sensor switch
• 12-volt coil with 1 wire lead for easy connection
• 6-groove serpentine pulley with 3.875-inch diameter
• Tangent mount type with 2.000-inch clutch to mounting flange distance
• Sealing washer type suction and discharge ports with included O-rings
• Designed for Sanden/Sankyo TRSA12 compressor type

About the Four Seasons Reman Compressor Line

The Reman Compressor line by Four Seasons offers remanufactured A/C compressors that restore original equipment performance. Each unit undergoes a thorough rebuilding process, including replacement of wear components and testing to ensure reliability. The 77561 model maintains compatibility with specific vehicle makes and models, providing a cost-effective alternative to new compressors without compromising quality.

Detailed Product Description

This Four Seasons Reman Compressor 77561 is engineered for vehicles such as the Buick Rainier, Chevrolet Trailblazer and Trailblazer EXT, GMC Envoy series, Isuzu Ascender, Oldsmobile Bravada, and Saab 9-7x. It features a 12-volt coil with a single wire lead and a heat switch type sensor included for system protection. The compressor uses R134a refrigerant and is compatible with Pag 46 oil, ensuring proper lubrication and cooling. The pulley system includes a 6-groove serpentine belt design with a 3.875-inch diameter, matching OEM specifications for smooth operation. The tangent mount style and precise clutch dimensions facilitate straightforward installation. Both suction and discharge ports utilize sealing washers with included O-rings to maintain system integrity.

Common Applications and Issues Addressed

• Replacement for failed or leaking A/C compressors in compatible Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab models
• Restores proper refrigerant flow and pressure in R134a systems
• Resolves clutch engagement problems with included clutch assembly
• Addresses overheating issues with integrated heat sensor switch
• Eliminates pulley belt slippage with correct 6-groove serpentine pulley

Installation Notes and Tips

• May require use of original equipment (OE) electrical connector for proper wiring
• Mounting hardware is not included; reuse existing hardware or source separately
• Ensure system is evacuated and recharged with R134a refrigerant and Pag 46 oil
• Verify clutch air gap and pulley alignment during installation
• Inspect O-rings and sealing washers for proper sealing to prevent leaks

Quality Assurance and Warranty

The Four Seasons Reman Compressor 77561 is remanufactured to meet or exceed OEM standards. Each unit is tested for performance and durability before shipment. While specific warranty details may vary, Four Seasons typically offers a limited warranty covering defects in materials and workmanship to provide confidence in product reliability.