Gates 39120 Accessory Drive Belt Tensioner Assembly

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner

The Gates DriveAlign Premium OE Automatic Belt Tensioner 39120 is engineered to maintain optimal tension on the accessory drive belt system. Designed for select Chrysler, Dodge, Jeep, Mitsubishi, and Ram models, this tensioner assembly ensures consistent belt performance and longevity.

• Constructed with durable thermoplastic materials for reliable operation
• Includes two pulleys: one flanged and one non-flanged for precise belt guidance
• Compatible with V-ribbed belt types featuring smooth and grooved contact surfaces
• Features a single mounting hole for secure installation
• Bearing bore inside diameter measures 17 mm (.67 in) for both pulleys
• Outside pulley diameter is 76 mm (2.99 in) with widths of 26 mm and 27 mm respectively
• Comes complete with tensioner assembly and mounting bolt

Detailed Product Description and Attributes

The Gates DriveAlign Premium OE Automatic Belt Tensioner 39120 is designed to meet original equipment (OE) performance standards, providing reliable belt tension control for accessory drive systems. The assembly includes two pulleys: Pulley 1 is non-flanged, while Pulley 2 is flanged, accommodating a V-ribbed belt with six grooves on the flanged pulley and a smooth backside on the other. Both pulleys have an outside diameter of 76 mm (2.99 inches) and widths of 26 mm and 27 mm, ensuring proper belt alignment and tension. The thermoplastic construction offers resistance to wear and heat, contributing to the tensioner's durability. The bearing bore inside diameter is consistent at 17 mm (.67 inches) for both pulleys, supporting smooth rotation and reducing friction.

DriveAlign Premium OE Automatic Belt Tensioner Product Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates focuses on delivering tensioner assemblies that match or exceed original equipment specifications. This product line emphasizes precise fitment and reliable performance for accessory drive belt systems, making it suitable for vehicles requiring exact OE replacement parts. The 39120 tensioner assembly is part of this line, ensuring compatibility and durability for the specified Chrysler, Dodge, Jeep, Mitsubishi, and Ram models.

Compatible Vehicles and Common Applications

This belt tensioner assembly is compatible with a range of vehicles, including:

• Chrysler Aspen, 1500, and Commander
• Dodge Dakota, Durango, and Ram 1500/2500
• Jeep Grand Cherokee, Liberty, and Nitro
• Mitsubishi Raider

It is designed to maintain proper tension on V-ribbed accessory belts, which drive components such as the alternator, power steering pump, and air conditioning compressor.

Common Issues Addressed by This Belt Tensioner

• Eliminates belt slippage caused by improper tension
• Prevents premature belt wear and cracking
• Reduces noise from loose or misaligned belts
• Maintains consistent accessory drive performance
• Helps avoid engine overheating due to accessory failure

Installation Notes and Tips

• Ensure vehicle compatibility with the Gates 39120 part number before installation
• Use the included mounting bolt to secure the tensioner assembly firmly
• Inspect the V-ribbed belt for wear and replace if necessary during installation
• Verify pulley alignment and belt routing according to manufacturer specifications
• Check tensioner operation by rotating the pulleys to confirm smooth bearing function

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner 39120 is manufactured to meet OE performance standards, ensuring reliable operation and durability. Gates provides a limited warranty on this part, covering defects in materials and workmanship under normal use. This warranty supports confidence in the product’s quality and fitment for the specified Chrysler, Dodge, Jeep, Mitsubishi, and Ram vehicles.