Dorman 300-400 Power Steering Pump Pulley

Overview of Dorman Power Steering Pump Pulley 300-400

The Dorman 300-400 power steering pump pulley is designed for reliable performance in Toyota 4Runner, Pickup, and T100 models. Constructed from durable steel with a gold finish, this pulley supports efficient power steering operation with a single V-belt groove.

• Material: Steel for strength and durability
• Color: Gold finish for corrosion resistance
• Groove Quantity: 1 groove compatible with V-belt systems
• Outside Diameter: 5.35 inches for precise fitment
• Mounting Hole Quantity: 1 hole for secure attachment
• Belt Type: Designed for V-belt drive systems
• Mounting Hardware: Not included
• Installation Instructions: Not included
• Item Grade: Standard replacement quality
• Package Contents: Pulley only
• Pulley Bore Diameter: 14 mm

Detailed Product Description

The Dorman 300-400 power steering pump pulley is engineered to meet the specifications required for Toyota 4Runner, Pickup, and T100 vehicles. Its steel construction ensures long-lasting durability under typical driving conditions. The gold finish provides additional protection against rust and wear. Featuring a single groove designed for V-belt systems, this pulley maintains proper belt alignment and tension, which is critical for smooth power steering pump operation. The 5.35-inch outside diameter and 14 mm bore size ensure compatibility with the original equipment setup. This pulley is a standard replacement part, intended to restore the function of the power steering pump pulley without modification.

Common Applications and Problem Resolution

• Replaces worn or damaged power steering pump pulleys on Toyota 4Runner, Pickup, and T100 models
• Addresses issues with belt slippage or misalignment causing steering noise or reduced assist
• Resolves pulley corrosion or structural damage affecting power steering performance
• Helps eliminate vibration or wobbling caused by pulley wear
• Restores proper belt tension for consistent power steering pump operation

Installation Notes and Tips

Installation of the Dorman 300-400 power steering pump pulley requires removal of the old pulley and mounting the new one using the existing hardware, as mounting hardware is not included. Ensure the pulley bore and mounting hole align correctly with the power steering pump shaft. Use appropriate tools to press or bolt the pulley securely in place. Verify belt alignment and tension after installation to prevent premature wear. Refer to vehicle-specific service manuals for torque specifications and detailed procedures.

Quality Assurance and Warranty

Dorman power steering pump pulleys are manufactured to meet or exceed OEM standards for fit, form, and function. The 300-400 part number is a standard replacement grade component designed for dependable service life. While installation instructions and mounting hardware are not included, the product undergoes quality checks to ensure dimensional accuracy and material integrity. Warranty coverage details should be confirmed through the product packaging or Dorman's official resources.