Dexter electric drum brakes use different magnet kits depending on the brake diameter, shoe width and axle capacity. The four photographed replacement kits below have distinct order numbers. The colour of the magnet wires helps identify them, but the installed brake assembly number remains the most reliable starting point.
Original Dexter manufacturer illustration
The original Dexter reference provides the small callout numbers, component orientation and production changes. Select the diagram or photograph below to enlarge it.
Find the magnet kit by brake size
Use the complete brake assembly number, size and axle rating. Wire colour alone is not sufficient.
| Brake size | Typical axle brake rating | Dexter magnet kit | Wire colour |
|---|---|---|---|
| 7 × 1¼ in | 2,200 lb | K71-057-00 | White (7-inch brake, after April 1990) |
| 10 × 1½ in | 3,000 lb | K71-104-00 | Green |
| 10 × 2¼ in | 3,500 lb | K71-104-00 | Green |
| 10 × 2¼ in | 4,400 lb | K71-125-00 | Black |
| 12 × 2 in | 5,200–6,000 lb | K71-105-00 | White |
| 12 × 2 in | 7,000 lb | K71-125-00 | Black |
Magnet springs and older brakes
Use Dexter's official service and installation instructions when working on trailer brakes. Check both sides of the axle, mounting, wiring and the condition of the complete braking system before returning the trailer to service.
Other Dexter parts diagrams
See the matching brake components
These images come from the pictured NewRVParts listings. Select a product to see its order number and additional details.
Dexter K71-057 white-wire brake magnet kitManufacturer number K71-057-00 — view the product
Dexter K71-104 green-wire brake magnet kitManufacturer number K71-104-00 — view the product
Dexter K71-105 white-wire brake magnet kitManufacturer number K71-105-00 — view the product
Dexter K71-125 black-wire brake magnet kitManufacturer number K71-125-00 — view the product