Gates 37133P Alternator Decoupler Pulley

Alternator Decoupler Pulley Overview

The Gates 37133P is a steel alternator decoupler pulley built for accessory belt drive systems that need vibration isolation and controlled overrunning during engine deceleration. It is an OE Exact replacement for Mitsubishi applications and is listed for Mitsubishi Outlander Sport, Outlander, Lancer, and RVR fitments.

Key Features

• OE Exact comparison rating for direct replacement use.
• Steel construction with a V-ribbed grooved contact surface.
• Flanged design for secure pulley mounting.
• Includes the pulley and dust cap.
• Requires tool part number 91024-1 for installation.
• Gates DriveAlign decoupler pulley design helps isolate belt-drive vibration.

Detailed Description

Gates DriveAlign alternator decoupler pulleys let the alternator free-wheel when engine speed drops, reducing belt shock and helping the charging system run more smoothly. The 37133P uses a 6-groove, 55 mm outside diameter, 17 mm bore, and 37 mm width configuration, with a steel body and flanged construction. This part cross-references Dorman - OE Solutions 300-884 for the same application. For Mitsubishi Outlander, Mitsubishi Outlander Sport, and Mitsubishi Lancer service work, the Gates 37133P supports OE-style replacement needs without changing the original belt-drive layout.

What It Is Used For

• Alternator pulley noise caused by decoupler wear.
• Belt vibration during engine deceleration.
• Charging system harshness from pulley overrun issues.
• Premature belt and accessory component wear.
• Fitment-specific replacement on Mitsubishi Outlander, Outlander Sport, Lancer, and RVR applications.

Installation Notes and Tips

Use the specified installation tool part number 91024-1 when servicing this pulley. Verify the 6-groove, flanged, V-ribbed grooved design and matching bore dimensions before installation. Confirm the vehicle application against the listed Mitsubishi Outlander, Outlander Sport, Lancer, and RVR fitments, and follow the service procedure for the charging system component being replaced.

Quality Assurance

Gates DriveAlign is a product line focused on alternator decoupler pulleys and one-way clutches, which are not interchangeable. The 37133P is identified with an OE Exact comparison rating for application matching.