1980-1986 Ford F-150 & F-100 Brake Master Cylinder – Casting [Insert Casting Number]
CRITICAL: Verify Specifications
Always verify the casting number and physical bore specifications on your original core before installation to ensure accurate fitment.
Product Specifications
- Bore Diameter: 1-inch bore size
- Application: Heavy-duty fleet and automotive vehicles
Verified Casting Numbers
- [Insert Casting Number]
Application & Fitment Data
Model Years: 1980, 1981, 1982, 1983
Model Years: 1985
Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985:
- Alignment: Ensure proper piston and bore alignment before securing mounting bolts to prevent leaks and ensure smooth operation. A misaligned pushrod restricts the piston from returning to its fully open “at rest” position, keeping the compensating ports closed and locking up the front brakes.
- Bench Bleeding: Always complete a thorough bench-bleeding routine until all air bubbles vanish completely from both ports prior to final vehicle assembly to protect your internal seals from running dry.



