New Brake Master Cylinder 1-1/2-inch bore size FD2704 FE2704 FE2707 2704 Bexar Pro Components: Heavy-Duty Reliability for Fleet & Industry. Restore your braking system to peak performance with the M66177 Master Cylinder from Bexar Pro Components. Engineered with a precision 1-1/2-inch bore and high-grade materials, this unit is built for the rugged demands of heavy-duty fleet reliability, making it the ideal solution for both industrial equipment and specialized automotive systems. Key Specifications & Expert Features Bore Diameter: 1-1/2-inch bore size (Critical for pressure calibration) Piston Depth: 2-1/2″ (Deep cup piston—verify against existing unit) Outlet Size: 1/8″ NPT (Primary) | 1/2-20 (Outlets 2 & 3) Application: Heavy-duty forklifts, graders, and industrial machinery. Companion Repair Kit: 39MK (View Compatible Kit) Verified Casting & Part Numbers Matching your existing part number is the most reliable method to ensure correct fitment. This unit replaces: FD2704 FE2704 FE2707 2704 2704C 616812 618112 Expert Installation & Field Note Based on our shop experience specializing in heavy-duty brakes since 1985: Improper pushrod alignment is the leading cause of “spongy” pedal feel or premature seal failure. On heavy machinery like motor graders, ensure total linkage alignment to prevent side-loading. Our M66177 housing uses a specialized honing process for superior bore integrity, outlasting standard industrial replacements. ⚠ CRITICAL: Verify Specifications To ensure safety, verify that this master cylinder’s 1-1/2-inch bore size and 2-1/2″ deep cup piston match your existing unit. NOT for Wagner Power Masters (flat-style piston) or Mico Cylinders (flat reaction piston – See last picture). Check your internal components before ordering. Bexar Pro Components SKU: M66177 Official Master Cylinder Installation Guide
