Dorman M122228 Brake Master Cylinder

Reliable Brake Master Cylinder Replacement

The Dorman M122228 Brake Master Cylinder is engineered to provide consistent hydraulic pressure for your vehicle's braking system. Designed with a durable aluminum construction and precise bore diameter, this master cylinder supports safe and effective brake operation for various makes and models.

• Master cylinder bore diameter: 1.125 inches for accurate hydraulic control
• Constructed from lightweight, corrosion-resistant aluminum material
• Includes two outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter 10 mm
• Thread pitch of 1.0 ensures secure fitting with compatible brake lines
• Package contains the master cylinder only; reservoir and mounting hardware not included

Product Details and Specifications

The Dorman M122228 master cylinder is designed to replace original equipment units with a 1.125-inch bore diameter, ensuring proper hydraulic pressure for brake systems. Its aluminum construction offers resistance to corrosion and heat, contributing to long-term durability. The unit features two outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with a 10 mm thread diameter, both with a 1.0 thread pitch for compatibility with standard brake lines. This master cylinder does not include a reservoir or sensor, so it is intended for applications where these components are reused or replaced separately.

Common Applications and Problem Resolution

• Restores brake hydraulic pressure in vehicles experiencing spongy or unresponsive brakes
• Replaces master cylinders with internal leaks or worn seals causing brake fluid loss
• Addresses brake pedal sinking or failure due to master cylinder wear
• Suitable for vehicles requiring a 1.125-inch bore diameter master cylinder
• Compatible with brake systems needing M10 x 1.0 rearward outlet connections

Installation Notes and Tips

When installing the Dorman M122228 master cylinder, ensure the brake fluid reservoir is compatible and properly connected, as this unit does not include a reservoir. Bleed the brake system thoroughly after installation to remove air and restore proper hydraulic pressure. Verify that the outlet threads match your vehicle’s brake lines to avoid leaks. Professional installation is recommended for safety and optimal performance.

Quality Assurance and Warranty

Dorman manufactures the M122228 master cylinder to meet or exceed OEM standards for fit and function. The aluminum construction provides corrosion resistance and durability under typical operating conditions. While specific warranty details are not provided, Dorman products generally come with a limited warranty covering defects in material and workmanship. Consult product documentation or Dorman directly for warranty terms.