Master Cylinder Assembly – Hydraulic Disc Brake – 4-127-22
Complete OEM master cylinder assembly designed for hydraulic disc brake surge actuators.Includes master cylinder body (32291U) and piston / return spring kit (054-140-22), factory assembled and ready to install.
Common replacement for Dexter and Titan / Dico hydraulic disc brake actuators.Engineered for consistent hydraulic pressure and corrosion resistance.
Listing includes one complete master cylinder assembly.
Specifications
| Specification | Detail |
| Part Number | 4-127-22 |
| Includes | (1) 32291U Master Cylinder Body (1) 054-140-22 Piston & Return Spring Kit |
| Brake Type | Hydraulic Disc Brake |
| Fluid Port Size | 3/16" Inverted Flare – 3/8-24 Thread |
| Material | Aluminum Housing / Plated Steel Piston & Spring |
| Common Applications | Dexter DX Series, Titan / Dico Model 20 Disc, Aero 7500 Disc |
| Brake Fluid | DOT 3 or DOT 4 |
| Country of Manufacture | USA |
R&P Knowledge Hub
The master cylinder converts surge actuator movement into hydraulic pressure,sending brake fluid through the lines to activate disc brake calipers.A worn or leaking master cylinder can cause reduced braking performance,fluid loss, or inconsistent stopping.
When replacing a master cylinder, inspect the actuator housing,reservoir, gasket, and brake lines for wear or contamination.Always confirm actuator model compatibility and fluid port thread size before installation.
Features
- Direct OEM replacement – no modification required
- Factory-assembled with piston and spring kit installed
- Precision-machined bore for consistent brake pressure
- Designed for hydraulic disc brake surge actuators
- Compatible with DOT 3 and DOT 4 brake fluid
- Replaces older Dico / Titan references
Verify actuator model and port thread size before installation.
