Dexter Pair Nev-R-Adjust Electric Brake Kit 10 x 2-1/4 Left and Right Newer 4 Bolt Flange K23-478-479
Pair of Dexter Nev-R-Adjust electric brake backing plate assemblies for compatible 4,400 lb trailer axle applications using a newer special 4 bolt flange. Includes one left-hand assembly, one right-hand assembly, mounting nuts, adjuster plugs, and instruction sheet.
Overview
This Dexter brake kit includes a matched left-hand and right-hand Nev-R-Adjust electric backing plate assembly set for compatible 4,400 lb trailer axle applications using a 10 inch x 2-1/4 inch brake size and newer special 4 bolt flange. It is a smart replacement choice when both sides need to be serviced together, helping maintain balanced braking and simplifying parts matching during installation.
R&P Service Insight
Replacing both brake assemblies at the same time is often the cleanest way to restore even braking performance on an axle. Matching left and right assemblies matters, and special flange patterns should always be verified before ordering.
- Matched Pair: Includes both left-hand and right-hand backing plate assemblies for one axle position.
- Self-Adjusting Design: Nev-R-Adjust style helps reduce manual brake adjustment service compared with standard manual-adjust assemblies.
- Flange Verification: Confirm your axle uses the newer special 4 bolt flange pattern before installation.
R&P Knowledge Hub
Compatibility: Intended for compatible 4,400 lb trailer axle applications using 10 inch x 2-1/4 inch electric brake assemblies, a newer special 4 bolt flange, and Dexter drum casting numbers 8-407 or 8-498 where all mounting details match.
Vehicle / System Fit: Trailer electric brake system for one axle position requiring a left and right brake assembly pair.
Installation Notes: Verify flange dimensions, drum reference, mounting stud spacing, and brake size before ordering. This kit includes pressed-in bolts, mounting nuts, adjuster plugs, and an instruction sheet.
Performance Insight: Installing a matched pair helps keep braking more even from side to side, while the self-adjusting design supports more consistent shoe-to-drum adjustment in regular trailer use.
Brand & Fitment Note
Selling Brand: Dexter
Application Reference: Any OEM or platform names in this listing describe compatibility, fitment target, or application style only where supported by verified dimensions, mounting points, and configuration details.
What This Means: This listing is for a Dexter pair of Nev-R-Adjust electric brake backing plate assemblies, not a guaranteed fit for every 4,400 lb trailer axle unless brake size, flange layout, drum reference, and mounting measurements match your current setup.
Before Ordering: Verify measurements, mounting style, orientation, connector style, axle/brake/hub specifications, wheel clearance, and included components before installation.
R&P Repair Insight
The most common fit-up issues on these brake kits come from assuming all 10 inch brake assemblies use the same flange pattern. Check the flange measurements and drum references first, especially on older or mixed-component trailer axles.
- Flange Pattern Check: Confirm the special 4 bolt flange pattern matches your current axle mounting points.
- Drum Reference Check: Compare your existing drum casting number to 8-407 or 8-498 where applicable.
- Pair Replacement Benefit: Replacing both sides together can help avoid uneven braking caused by mixing old and new assemblies.
Features
Complete Left and Right Pair
Includes one left-hand and one right-hand backing plate assembly for a complete axle set.
Nev-R-Adjust Self-Adjusting Design
Self-adjusting brake design helps maintain more consistent brake shoe adjustment during normal use.
Special Newer 4 Bolt Flange
Designed for applications using the special newer 4 bolt mounting flange shown by the provided measurements.
Installation Components Included
Includes mounting nuts, adjuster plugs, and an instruction sheet, with bolts already pressed into the assemblies.
Specifications
| Specification | Detail |
|---|---|
| Part Number | K23-478-479 |
| Brand | Dexter |
| Product Type | Pair of Nev-R-Adjust electric brake backing plate assemblies |
| Application | Trailer axle electric brake system |
| Material / Finish | Not specified |
| Key Measurement | 10" diameter x 2-1/4" wide |
| Fitment | Compatible 4,400 lb trailer axle applications with newer special 4 bolt flange |
| Adjustment Type | Nev-R-Adjust / self-adjusting |
| Drum Reference | Fits Dexter drum casting number 8-407 or 8-498 |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Trailer electric brake system |
| Primary Fit | 4,400 lb trailer axles using 10" x 2-1/4" self-adjusting electric brake assemblies with newer special 4 bolt flange |
| Secondary Fit | Applications using Dexter drum casting number 8-407 or 8-498 and 13", 14", 15", or 16" wheels with 6 on 5.5 bolt pattern where clearance and configuration match |
| Notes | Verify flange measurements before ordering: top stud to opposite top stud 2-7/8", top stud to bottom stud 3", and bottom stud to opposite stud 3-1/4". |
Included Components
| Quantity | Item |
|---|---|
| 1 | Left backing plate assembly |
| 1 | Right backing plate assembly |
| 1 | Instruction sheet |
| 8 | Mounting nuts |
| 4 | Adjuster plugs |
