Litens 31480228 Overrunning Alternator Decoupler Pulley for Volvo

The Litens 31480228 is an Overrunning Alternator Decoupler (OAD) pulley designed specifically for Volvo vehicles equipped with turbocharged and supercharged engines. This advanced pulley technology replaces conventional solid pulleys to improve belt drive system performance and reliability.

Key Features:

• OAD technology with internal spring and damping device for smooth engagement
• Designed to free-wheel in one direction and softly engage in the opposite direction
• Reduces belt noise, vibration, and harshness in the accessory drive system
• Protects the alternator and other front-end accessory drive components
• Maintains proper alternator function under varying engine loads
• Original equipment design manufactured by Litens, a leading OE supplier
• 6-ribbed running surface for serpentine belt compatibility
• Includes protective cap for proper installation

Technical Specifications:

• Outer Diameter: 66mm
• Inner Diameter: 18mm
• Width: 53.2mm
• Material: Steel construction
• Cross Reference: Litens 920539A, Volvo OEM 30644952

As a sacrificial component in the front-end accessory drive system, this OAD pulley helps extend belt and alternator life while improving overall system efficiency. Litens invented the OAD technology and manufactures this replacement part to meet or exceed original equipment specifications for form, fit, and performance. Installation instructions and necessary tools are typically included to ensure proper fitment.