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Dorman M390117 Brake Master Cylinder
Reliable Brake Master Cylinder for Ford Econoline Models
The Dorman M390117 Brake Master Cylinder is engineered to restore proper brake hydraulics in Ford E-150 Econoline, E-150 Econoline Club Wagon, E-250 Econoline, E-350 Econoline, and E-350 Econoline Club Wagon vehicles. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.
- Master cylinder bore diameter: 1.125 inches for accurate hydraulic control
- Constructed from durable aluminum material for corrosion resistance
- Includes reservoir and sensor for complete brake system integration
- Equipped with four outlets: two rearward outlets sized 9/16-18 and two secondary outlets sized 7/16-24
- Package contains the master cylinder only; mounting hardware not included
Product Details and Specifications
The Dorman M390117 brake master cylinder features a 1.125-inch bore diameter, which is critical for maintaining the correct hydraulic pressure within the brake system. Its aluminum construction offers enhanced durability and resistance to corrosion, extending the service life of the component. This unit comes with an integrated reservoir and sensor, allowing for seamless compatibility with the vehicle’s brake fluid monitoring system. The master cylinder includes four outlets—two rearward outlets with 9/16-18 thread size and two secondary outlets with 7/16-24 thread size—ensuring proper brake line connections for the Ford Econoline series.
Compatible Vehicles and Applications
This brake master cylinder is specifically compatible with the following Ford models:
- Ford E-150 Econoline
- Ford E-150 Econoline Club Wagon
- Ford E-250 Econoline
- Ford E-350 Econoline
- Ford E-350 Econoline Club Wagon
Using the Dorman M390117 ensures proper fitment and reliable brake system performance for these vehicles.
Common Issues Addressed by This Master Cylinder
- Brake pedal sinking or sponginess due to internal leaks
- Brake fluid leaks from a worn or damaged master cylinder
- Inconsistent brake pressure causing uneven braking
- Brake warning light activation related to sensor failure
- Reduced braking efficiency from a faulty reservoir or sensor
Installation Notes and Tips
Installation of the Dorman M390117 brake master cylinder requires careful attention to brake fluid handling and system bleeding procedures. Since mounting hardware is not included, retain original fasteners or source compatible hardware. Ensure all brake lines are properly connected to the correct outlets—two rearward outlets (9/16-18) and two secondary outlets (7/16-24)—to maintain system integrity. After installation, thoroughly bleed the brake system to remove air and verify sensor operation for accurate brake fluid level monitoring.
Quality Assurance and Warranty
Dorman manufactures the M390117 brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and integrated sensor contribute to long-term reliability. This part is backed by Dorman’s standard warranty coverage, providing confidence in its durability and performance for Ford E-150 Econoline and related models.
| Brand | Dorman |
|---|---|
| Part Number | M390117 |
| Master Cylinder Bore Diameter | 1.125 |
| Master Cylinder Material | Aluminum |
| Mounting Hardware Included | No |
| Number of Outlets | 4 |
| Package Contents | Master Cylinder |
| Rearward Outlet Size | (2) 9/16-18 |
| Reservoir Included | Yes |
| Secondary Outlet Thread Diameter | (2) 7/16-24 |
| Sensor Included | Yes |
This part fits 12 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1993 | Ford | E-150 Econoline | N/A | Fits vehicles with over 6,500 pound Gross Vehicle Weight. |
| 1993 | Ford | E-150 Econoline Club Wagon | N/A | Fits vehicles with over 6,500 pound Gross Vehicle Weight. |
| 1993 | Ford | E-250 Econoline | N/A | |
| 1993 | Ford | E-350 Econoline | N/A | Single Rear Wheel (SRW) fitment. |
| 1993 | Ford | E-350 Econoline | N/A | w/Dual Rear Wheels (DRW) |
| 1993 | Ford | E-350 Econoline Club Wagon | N/A | w/Dual Rear Wheels (DRW) |
| 1993 | Ford | E-350 Econoline Club Wagon | N/A | Single Rear Wheel (SRW) fitment. |
| 1992 | Ford | E-150 Econoline | N/A | Fits vehicles with over 6,500 pound Gross Vehicle Weight. |
| 1992 | Ford | E-150 Econoline Club Wagon | N/A | Fits vehicles with over 6,500 pound Gross Vehicle Weight. |
| 1992 | Ford | E-250 Econoline | N/A | Compatible with drum brake systems with a 1.125" bore size. |
| 1992 | Ford | E-350 Econoline | N/A | Compatible with drum brake systems with a 1.125" bore size. |
| 1992 | Ford | E-350 Econoline Club Wagon | N/A | Compatible with drum brake systems with a 1.125" bore size. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.