Description
New Brake Master Cylinder 1-3/4-inch bore size FF57571 30077
Bexar Pro Components: Heavy-Duty Reliability for Fleet & Industry.
Key Specifications & Expert Features
- Bore Diameter: 1-3/4-inch bore size (Critical for high-volume hydraulic displacement)
- Outlet Size: 1/2-20 INV (Standard inverted flare thread for direct line connection)
- Application: Heavy-duty industrial machinery, large-scale fleet vehicles, and specialized performance trucks.
- Repair Kit: N/A (Contact us for complete unit replacement recommendations)
Verified Casting & Part Numbers
Matching your existing casting number is the most reliable method to ensure correct fitment. This unit replaces:
- FF57571
- FE57571
- 30077
Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985: The 1-3/4-inch bore is a high-volume specification typical of heavy equipment hydraulic circuits. When installing the M3646589, technical precision regarding pushrod alignment is vital. Side-loading the piston in a bore this size can lead to rapid seal degradation. Ensure your linkage is adjusted to provide a full, square stroke and always perform a complete system bleed to remove all air from the oversized galleries.
âš CRITICAL: Verify Specifications
To ensure safety, verify that this master cylinder’s 1-3/4-inch bore size and 1/2-20 INV outlet match your existing unit exactly before purchasing. Proper displacement is essential for automotive and industrial safety.
