Dexter 7" Replacement Magnet for 2,000lb Backing Plates
A high-quality universal round magnet assembly designed to restore stopping power for 7" x 1-1/4" electric trailer brake systems. Compatible with major brands like Dexter, AL-KO, and Lippert.
Overview
The 40-134 is a replacement round magnet assembly engineered for 7" electric trailer brakes. This high-quality aftermarket solution is designed for 2,000lb to 2,200lb axles where measurements and mounting points match. It features a non-polarized two-wire lead with a braided protective sleeve for long-lasting durability against the backing plate, providing a reliable fix for weak or failing brake systems.
R&P Service Insight
Magnet wear is a leading cause of weak trailer brakes. Our shop recommends checking magnets every season to ensure consistent performance.
- Non-Polarized: Two white wires—either can be used for power or ground for a simpler install.
- Braided Sleeve: Integrated wire protection prevents shorts caused by vibration and chafing.
- Kit Complete: Includes the essential safety clip and spring to ensure proper lever arm engagement.
R&P Knowledge Hub
Compatibility: Fits approximately 95% of 7" brakes from Dexter, AL-KO, Lippert (LCI), Hayes, and Axis.
System Fit: Standard on 2,000 lb axles and found on select 2,200 lb axle configurations.
Installation Notes: Always replace the magnet spring and retainer clip (included) during installation to ensure the magnet maintains proper flat contact with the drum face.
Performance Insight: Proper engagement with the brake drum armature is critical; ensure the drum surface is smooth for maximum friction efficiency.
Brand & Fitment Note
Selling Brand: R&P Carriages (Aftermarket Replacement)
Application Reference: Brand names like Dexter, AL-KO, and Lippert are used for compatibility reference only based on verified industry dimensions for 7" x 1-1/4" brakes.
What This Means: This listing is for a high-quality aftermarket magnet assembly kit, providing a cost-effective alternative to OEM-branded components while maintaining standard fitment requirements.
Before Ordering: Verify your brake size is 7" diameter and uses a round magnet design before purchasing.
R&P Repair Insight
Unsure if your magnets are bad? Check for these common failure points before ordering.
- Visual Inspection: If you can see copper coils through the friction surface, the magnet is fully exhausted.
- Uneven Wear: If the face is worn at an angle, check your lever arm and bushings for play.
- Drum Surface: If the drum armature surface has deep grooves, it must be turned or replaced to prevent ruining the new magnet.
Features
Universal Compatibility
Fits nearly all 7" electric brake brands including Dexter, Lippert, and AL-KO produced in the last 15 years.
Durable Wire Protection
Features a braided protective sleeve to prevent wire chafing and electrical shorts against the backing plate.
Complete Refresh Kit
Includes the magnet assembly, spring, and retainer clip so you don't have to reuse old, fatigued hardware.
Non-Polarized Wiring
Simplified two-wire design eliminates guesswork—no specific positive or negative orientation is required for hookup.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 40-134 |
| Brake Size | 7" x 1-1/4" |
| Magnet Diameter | 1-7/8" |
| Magnet Thickness | 7/8" |
| Shape | Round |
| Wiring | 2-Wire (White Lead) |
| Axle Rating | 2,000 lbs - 2,200 lbs |
Fitment / Application
| Category | Details |
|---|---|
| System Type | Electric Trailer Brakes |
| Major Brands | Dexter, AL-KO, Lippert, Hayes, Axis |
| Drum Type | Requires flat vertical armature surface |
| Notes | Universal design fits roughly 95% of 7" electric brake assemblies on the market. |
Included Components
| Quantity | Item |
|---|---|
| 1 | Round Magnet Assembly (with braided sleeve) |
| 1 | Magnet Spring |
| 1 | Retainer Clip |
