Four Seasons 45987 Accessory Drive Belt Tensioner Pulley

Overview of Four Seasons Pulley Accessory Drive Belt Tensioner Pulley

The Four Seasons Pulley 45987 is a precision-engineered accessory drive belt tensioner pulley designed for select Mercedes-Benz models. Crafted from durable black plastic, this pulley ensures reliable serpentine belt operation for vehicles such as the 190E, 300E, and C36 AMG.

• Material: High-quality black plastic construction
• Outside Diameter: 2.750 inches (69.85 mm)
• Inside Diameter (Bore): 0.375 inches (9.525 mm)
• Width: 1.000 inch (25.4 mm)
• Belt Type Compatibility: Serpentine belts with 1-inch (25.4 mm) width
• Groove Quantity: Smooth surface for optimal belt contact
• Mount Hole Quantity: Single mounting hole (hardware not included)
• Meets or exceeds OEM specifications
• Pulley Type: Back idler style, suitable for tensioner applications

Four Seasons Pulley Product Line Details

The Four Seasons Pulley line focuses on delivering reliable accessory drive components that meet or exceed original equipment manufacturer standards. This product line emphasizes precise fitment and durable materials, ensuring consistent performance in tensioner pulley applications. The 45987 pulley is part of this line, engineered specifically for Mercedes-Benz vehicles requiring a back idler pulley with smooth surface design.

Product Description and Specifications

This accessory drive belt tensioner pulley features a smooth groove surface designed to work seamlessly with serpentine belts measuring 1 inch in width. The black plastic material offers a balance of strength and lightweight construction, reducing wear on the belt system. With an outside diameter of 2.750 inches and a bore diameter of 0.375 inches, this pulley fits securely on the tensioner assembly. It is compatible with a range of Mercedes-Benz models including the 190E, 260E, 300CE, 300E, 300SD, 300SE, 300SEL, 300SL, 300TE, C36 AMG, C280, E320, S320, S350, and SL320.

Common Applications and Problem Solving

• Replaces worn or damaged accessory drive belt tensioner pulleys
• Eliminates belt slippage caused by pulley surface wear
• Resolves noise issues related to pulley misalignment or bearing failure
• Prevents premature serpentine belt wear due to improper tension
• Restores proper belt routing and tension in Mercedes-Benz accessory drive systems

Installation Notes and Tips

Installation requires removal of the old pulley and mounting hardware, which is not included with this part. Ensure the mounting hole aligns correctly with the tensioner arm. Verify belt width compatibility (1 inch) before installation. It is recommended to inspect the serpentine belt and related components during replacement to maintain optimal system performance.

Quality Assurance and Warranty

The Four Seasons Pulley 45987 meets or exceeds OEM standards for fit, form, and function. Manufactured with quality materials and precision engineering, this pulley is designed for durability and reliable operation. While specific warranty details are not provided, Four Seasons products typically adhere to industry quality assurance protocols to support long-term vehicle performance.