Trailer Brake Assembly / Dexter Electric Brakes / 15K Axles
Dexter 12-1/4" x 5" Electric Trailer Brake – 12K/15K Axle – Self-Adjusting – Right Hand
Genuine Dexter right-hand electric trailer brake assembly for 15,000 lb axle applications using a 12-1/4" x 5" brake setup. Forward self-adjusting design helps maintain brake shoe clearance during normal service.
Part Number: 023-447-00 12-1/4" x 5" Right Hand / Passenger Side
Key Measurements & Specs
| Specification |
Detail |
| Part Number / SKU |
023-447-00 |
| Brand |
Dexter |
| Product Type |
Complete electric trailer brake assembly |
| Brake Size |
12-1/4" diameter x 5" wide |
| Axle Application |
15,000 lb axle applications |
| Quantity Included |
1 right-hand brake assembly |
Fitment / Application
| Category |
Details |
| Trailer System |
Heavy-duty electric drum brake trailer axle systems |
| Primary Fit |
Dexter-style 15K axle applications using 12-1/4" x 5" electric brakes |
| Mounting Check |
Verify brake size, axle rating, drum compatibility, brake flange, and 7-bolt mounting pattern before ordering |
| Side Orientation |
Right hand / passenger side of trailer |
Top Features
| Feature |
Buyer Benefit |
| Forward Self-Adjusting |
Helps maintain proper shoe-to-drum clearance during service |
| Complete Assembly |
Brake components are pre-assembled on the backing plate |
| 15K Application |
Built for heavy-duty trailer axle brake service |
| Right-Hand Orientation |
Correct replacement for the passenger-side brake position |
Overview
This Dexter 023-447-00 electric trailer brake assembly is a right-hand, passenger-side replacement brake for compatible 15,000 lb axle applications using a 12-1/4" x 5" electric drum brake setup. It is supplied as a pre-assembled backing plate assembly, making it a practical replacement when servicing worn, weak, damaged, or contaminated trailer brakes.
R&P Service Insight
Brake assemblies should be matched by axle rating, brake size, mounting pattern, and side orientation. Right-hand and left-hand brake assemblies are not interchangeable.
-
Confirm Size: Match the 12-1/4" x 5" brake size to your existing drum and axle setup.
-
Confirm Side: This listing is for the right-hand / passenger-side brake assembly.
-
Confirm Mounting: Verify the brake flange and 7-bolt mounting pattern before installation.
R&P Knowledge Hub
Compatibility: This brake assembly is intended for compatible Dexter-style 15K axle applications using 12-1/4" x 5" electric trailer brakes. Verify before ordering.
Vehicle / System Fit: Commonly used on heavy-duty equipment trailers, commercial haulers, and high-capacity trailer brake systems where the brake size, axle rating, and mounting flange match.
Installation Notes: Electric brakes require a properly functioning trailer brake controller, wiring, breakaway system, magnets, drums, and ground connections. Inspect the full brake system during replacement.
Performance Insight: Forward self-adjusting brake assemblies help compensate for lining wear by maintaining proper shoe clearance, reducing the need for routine manual adjustment when the system is installed and operating correctly.
Brand & Fitment Note
Selling Brand: Dexter
Application Reference: Dexter, axle capacity, brake size, and side-orientation references are used to help identify compatible trailer brake applications.
What This Means: This listing is for one Dexter right-hand electric brake assembly, part number 023-447-00.
Before Ordering: Verify brake diameter, brake width, axle rating, mounting flange, 7-bolt pattern, drum compatibility, side orientation, and included components before installation.
R&P Repair Insight
When replacing a heavy-duty electric brake assembly, inspect the related wear components at the same time. A new backing plate assembly can only perform correctly when the drum surface, bearings, seals, wiring, magnets, and controller output are also in proper condition.
-
Drum Check: Inspect the brake drum for scoring, heat damage, excessive wear, or contamination.
-
Electrical Check: Confirm trailer wiring, brake controller output, ground connections, and breakaway battery condition.
-
Pairing Check: For balanced braking, compare condition on both sides of the axle and replace the matching side when needed.
Features
12-1/4" x 5" Brake Size
Designed for compatible heavy-duty trailer brake systems using a 12-1/4" diameter by 5" wide electric drum brake setup.
15K Axle Application
Built for 15,000 lb axle brake applications where the axle, drum, and brake flange specifications match this assembly.
Forward Self-Adjusting Design
Self-adjusting mechanism helps maintain brake shoe clearance during forward travel, supporting consistent brake performance.
Right-Hand Assembly
Correct orientation for the passenger side of the trailer. Always verify side orientation before ordering.
Pre-Assembled Backing Plate
Brake components are installed on the backing plate for a more efficient complete brake assembly replacement.
Electric Drum Brake Operation
Designed for electric trailer brake systems controlled by a compatible tow vehicle brake controller.
Included Components
| Quantity |
Item |
| 1 |
Dexter 023-447-00 right-hand 12-1/4" x 5" electric brake assembly |
| Not Included |
Brake drum, hub/drum, bearings, seals, brake controller, wiring, and breakaway battery |
| Verify Before Ordering |
Mounting hardware and any additional installation components |
Important Fitment Note: Verify all measurements, axle rating, brake size, mounting flange, 7-bolt pattern, side orientation, drum compatibility, electrical system condition, and included components before installation. Right-hand and left-hand brake assemblies are side-specific.
Dexter 023-447-00, Dexter K23-447-00, 12-1/4 x 5 electric brake assembly, 15K electric trailer brake, 15000 lb axle brake assembly, right hand electric brake, passenger side trailer brake, forward self adjusting electric brake, Dexter 12.25 x 5 brake, 7 bolt electric brake assembly, heavy duty trailer brake assembly
