Dorman M630028 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet P30 and GMC P3500

The Dorman M630028 brake master cylinder is engineered to restore proper brake hydraulics in Chevrolet P30 and GMC P3500 vehicles. Designed with durable aluminum construction and a built-in reservoir, this master cylinder ensures consistent brake fluid delivery for safe and effective braking performance.

• Master cylinder bore diameter: 40 mm for precise hydraulic pressure
• Constructed from lightweight, corrosion-resistant aluminum
• Includes an integrated reservoir for brake fluid
• Two outlet ports with rearward outlet size of 9/16-18 and secondary outlet thread diameter of 0.5 inches
• Compatible with Chevrolet P30 and GMC P3500 brake systems
• Part number M630028 for accurate replacement

Product Details and Specifications

This Dorman brake master cylinder (part number M630028) features a 40 mm bore diameter, which is critical for maintaining the correct hydraulic pressure in the brake system. The aluminum material offers a balance of strength and corrosion resistance, extending the service life of the component. The included reservoir simplifies installation and maintenance by providing a ready-to-use brake fluid container. With two outlets, including a rearward outlet sized 9/16-18 and a secondary outlet thread diameter of 0.5 inches, this master cylinder is designed to integrate seamlessly with the brake hydraulics of Chevrolet P30 and GMC P3500 models.

Common Applications and Problem Resolution

• Restores brake fluid pressure in Chevrolet P30 and GMC P3500 vehicles
• Replaces worn or leaking master cylinders causing brake pedal issues
• Addresses brake fluid reservoir leaks or damage
• Solves inconsistent brake pedal feel or sponginess
• Prevents brake system failure due to master cylinder wear

Installation Notes and Tips

Installation of the Dorman M630028 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. Note that mounting hardware is not included, so existing hardware should be inspected and replaced if necessary. Verify compatibility with Chevrolet P30 and GMC P3500 models before installation. Use appropriate tools to avoid damage to the aluminum housing and outlet threads during installation.

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for Chevrolet and GMC brake hydraulics. While mounting hardware is not included, the part is designed for direct replacement applications. Warranty coverage details should be confirmed at the point of purchase, ensuring confidence in product reliability and performance.