Match the part number, measurements and connection points that apply to your trailer.
| Hub Face | Measure hub face to hub face. |
|---|---|
| Spring Center | Measure mounting centers and confirm perch configuration. |
| Capacity | Match the required axle rating. |
| Brakes | Confirm brake type and flange configuration. |
Complete set of two genuine Dexter 12-1/4" x 3-3/8" hydraulic brake backing plate assembliesfor 9,000–10,000 lb general duty trailer axles. Includes one left-hand (driver side)and one right-hand (passenger side) brake assembly.
Designed for heavy-duty hydraulic drum brake systems using surge or electric-over-hydraulicactuators. Mounts to standard 7-bolt brake flanges.
These assemblies are for hydraulic systems only and cannot be used with electric drum brake systems.
Hydraulic brake assemblies use fluid pressure from a surge actuator or electric-over-hydraulic system to expand the brake shoes against the drum surface.
The duo-servo design provides self-energizing braking in both forward and reverse directions, improving stopping performance under heavy loads. Because brake assemblies are side-specific, a complete axle requires both a left and right unit — this listing includes both.
Before ordering, confirm brake size (12-1/4" x 3-3/8"), axle rating (9K–10K general duty), and 7-bolt flange configuration.
| Specification | Detail |
| Manufacturer | Dexter |
| Brake Diameter | 12-1/4 Inches |
| Brake Width | 3-3/8 Inches |
| Axle Capacity | 9,000–10,000 lbs (General Duty) |
| Mounting Pattern | 7 Bolt Flange |
| Configuration | Left & Right Pair |
| Brake Type | Hydraulic Duo-Servo |
Verify specifications before installation.
