Description
New Brake Master Cylinder 1-1/4-inch bore size FD9974 B238
Bexar Pro Components: Heavy-Duty Reliability for Fleet & Industry.
Key Specifications & Expert Features
- Bore Diameter: 1-1/4-inch bore size (Essential for high-pressure calibration)
- Outlet Size: 7/16-24 or 1/2-20 INV (Standard inverted flare options)
- Application: Medium-to-heavy duty trucks and industrial hydraulic systems.
- Companion Repair Kit: 33MK (View Compatible Kit)
Verified Casting & Part Numbers
Matching your existing part number is the most reliable method to ensure correct fitment. This unit replaces:
- FD9974
- B238
Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985: The 1-1/4-inch bore size is common across high-capacity fleet and industrial designs where consistent pressure is non-negotiable. When installing the M922041, ensure the pushrod is perfectly centered and adjusted to prevent side-loading the piston. Proper alignment is critical for maximizing seal longevity and maintaining a reliable pedal response under load.
⚠ CRITICAL: Verify Specifications
To ensure safety, verify that this master cylinder’s 1-1/4-inch bore size and inverted flare outlet match your existing unit exactly before purchasing.
