ABC Dynamics Heavy-Duty 1-1/2″ Bore Brake Master Cylinder – Engineered for Forklifts, Graders, and Industrial Equipment (Replaces FE2704)
**ABC Dynamics:** Precision Parts for Uncompromising Performance and Safety.
Get your heavy machinery back to peak operational status with the brand new **M66177 Heavy-Duty Brake Master Cylinder** from ABC Dynamics. This unit is engineered for a perfect, reliable fit and verified stopping power in the most demanding industrial applications. Trust our specialized expertise for quality you can feel with every stop.
Core Specifications & Critical Measurements
| Specification | Detail | Verification Note |
|---|---|---|
| Bore Diameter | 1 1/2″ | Critical component fit. |
| Piston Depth | 2 1/2″ | **MUST be verified against your existing unit.** |
| Outlet 1 (Primary) | 1/8″ NPT | |
| Outlet 2 & 3 | 1/2″-20 | |
| Repair Kit | 39MK | Available separately. |
Critical Installation & Maintenance Note from Our Engineers
Experience Matters: We have seen common failures in original equipment due to years of heavy cycling. Our M66177 housing is manufactured using a specialized honing process to provide superior bore surface integrity, ensuring seals last longer and pressure retention remains consistent throughout the life of the cylinder.
When replacing your master cylinder, always bleed your system thoroughly with new DOT 3 or DOT 4 fluid. Never reuse old fluid, as contamination is a primary cause of premature seal failure.
Verified Replacement Cross-Reference
This master cylinder is a confirmed replacement for the following casting numbers and part numbers. Simply match your existing casting number to the list below for assurance:
- FD2704
- FE2704
- FE2707
- 2704
- 2704C
- 45, 616812, 618112
- 61A, 8832, S230, B35
⚠ STOP! Avoid Costly Mis-Orders: Critical Compatibility Check
This replacement is engineered for units requiring a 2 1/2″ deep cup piston. It is **NOT** a direct replacement for:
- Wagner Power Master Cylinders: These units utilize a flat-style piston and a special flat reaction piston in the cylinder flange. Our unit is distinctly different due to its 2 1/2″ depth piston.
- Mico Cylinders: Although many Mico units may share the ‘2704’ casting number, Mico cylinders also utilize a flat reaction piston. It is critical to confirm that your existing unit does **not** have Mico internal components, regardless of the housing stamp. For verified Mico replacements, please see part number M100135.
For motor graders and other heavy equipment, verify your existing piston type before purchase. See the product images for a visual comparison guide.
ABC Dynamics Part Number: **M66177**
Safety and Performance Guaranteed.
| Weight | 8 lbs |
|---|---|
| Dimensions | 8 × 6 × 4 in |
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