Four Seasons 78594 A/C Compressor

Overview of Four Seasons New Compressor 78594

The Four Seasons New Compressor 78594 is designed specifically for Dodge D250, D350, W250, and W350 models. This A/C compressor is engineered to work with R134a refrigerant and comes pre-filled with compatible Pag 100 oil, ensuring reliable HVAC performance.

• Compatible refrigerant type: R134a
• Includes oil pre-filled (Pag 100 compatible)
• Clutch included with a maximum diameter of 4.750 inches
• 8-groove serpentine pulley for efficient belt engagement
• 12-volt coil with 1 wire lead terminal type (pin)
• Tangent mount type with a 0.859375 inch distance from clutch to mounting flange
• Rear-horizontal O-ring compressor head configuration
• O-ring type suction and discharge ports with included green O-rings
• Designed for Sanden/Sankyo SD709 compressor type

Four Seasons New Compressor Product Line Details

The Four Seasons New Compressor line offers brand-new, direct replacement compressors designed to meet or exceed OEM specifications. The 78594 model is part of this line, providing a complete solution with clutch and oil included, reducing installation time and ensuring compatibility with Dodge heavy-duty trucks like the D250 and W350.

Technical Description and Features

This Four Seasons A/C compressor features an 8-groove serpentine pulley with a 4.750-inch diameter, optimized for smooth belt operation in Dodge D250, D350, W250, and W350 vehicles. The compressor uses R134a refrigerant and is pre-filled with Pag 100 oil, which is compatible with the system's requirements. The clutch assembly is included, featuring a 4.750-inch maximum diameter and a 12-volt coil with a single wire lead for straightforward electrical connection. The compressor mounts tangentially with a precise 0.859375-inch distance from clutch to mounting flange, ensuring proper fitment. Both suction and discharge ports utilize O-ring seals with green O-rings included for leak prevention. The compressor head is configured with a rear-horizontal O-ring design, matching the Sanden/Sankyo SD709 compressor type used in these Dodge models.

Common Applications and Problem Solving

• Replacement for worn or failed A/C compressors in Dodge D250, D350, W250, and W350 trucks
• Resolves issues with insufficient cooling due to compressor failure
• Addresses noisy or slipping A/C clutch problems
• Fixes refrigerant leaks at compressor ports with included O-rings
• Improves overall HVAC system reliability and performance

Installation Notes and Tips

• Ensure compatibility with Dodge D250, D350, W250, and W350 models before installation
• Mounting hardware is not included; reuse existing hardware or source separately
• Verify proper belt alignment with the 8-groove serpentine pulley
• Check electrical connections for the 12-volt coil with pin terminal
• Replace O-rings during installation to prevent refrigerant leaks

Quality Assurance and Warranty

The Four Seasons New Compressor 78594 is a brand-new unit manufactured to meet OEM standards for durability and performance. It includes pre-filled oil and clutch assembly to simplify installation. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or supplier for exact warranty terms.