Ensure reliable, heavy-duty braking control with this brand new Brake Master Cylinder from Bexar Pro Components. Engineered with a powerful 2-inch bore size, this master cylinder is a direct replacement for critical braking systems found in International trucks, buses, and commercial transport. Trust in quality that meets or exceeds OEM specifications for casting number 2239045.

Verified Casting & Cross-Reference Numbers

• 2239045 (Primary Casting)
• Navistar: 1691291C92, 2517902C91, 5011314R91
• Bendix: BX012379

⚠ CRITICAL: Verify Specifications

To ensure safety, verify that this 2-inch bore size matches your existing unit exactly before purchasing. Brake master cylinder reservoir material and height may vary, but the core fit and hydraulic function remain identical. IMPORTANT: Adaptors on the outlet ports may be needed to fit your specific vehicle’s existing brake lines, as this casting was utilized across multiple assembly configurations.

Expert Installation & Field Note

Drawing on our shop experience specializing in heavy-duty brakes since 1985, we emphasize that pushrod alignment is vital for International medium-duty chassis. Always bench bleed the master cylinder before installation. Ensure the pushrod is perfectly centered; in 2-inch bore systems, even a slight misalignment can lead to premature seal wear under high-pressure fleet operation. Verify your outlet port orientation against original lines as some Navistar applications utilize external distribution blocks.