Description
New Brake Master Cylinder 1-inch bore size FD9977 11651
Bexar Pro Components: Heavy-Duty Reliability for Fleet & Industry.
Key Specifications & Expert Features
- Bore Diameter: 1-inch bore size (Critical for accurate pressure calibration)
- Outlet Size: 7/16″-24 INV (Standard inverted flare thread for direct line connection)
- Application: Performance automotive and specialized industrial fleet machinery.
- Companion Repair Kit: 3MK (View Compatible Kit)
Verified Casting & Part Numbers
Matching your existing casting number is the most reliable method to ensure correct fitment. This unit replaces:
- FD9977
- 11651
Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985: When installing the M921982, ensure your pushrod alignment is perfectly centered. Improper linkage adjustment or pushrod depth is the primary cause of internal seal bypass and a spongy pedal feel in both automotive and industrial applications. Always perform a thorough bench bleed and system flush with fresh fluid to protect the precision-honed bore of your new master cylinder.
⚠ CRITICAL: Verify Specifications
To ensure safety, verify that this master cylinder’s 1-inch bore size and 7/16″-24 INV outlet match your existing unit exactly before purchasing. Accurate displacement is required for proper braking function.
