6K manual brake — left023-105-00Standard-mount, left-hand 12 × 2-inch electric brake assembly. Confirm the axle brake flange before ordering.
View this partDexter 12-Inch Electric Trailer Brake Parts & Diagrams — 6K / 7K
Dexter 12 × 2-inch electric trailer brakes are available in different axle ratings, left- and right-hand positions, and manual or Nev-R-Adjust designs. Even when the drum and shoes look the same size, the mounting flange, internal magnet and adjuster can differ. Use the part number on your existing assembly and the axle identification information to find the right replacement.
Shop 12-inch Dexter brakes and service parts
6K manual brake — left023-105-00
6K manual brake — right, 9-hole023-106-09Special nine-hole mounting configuration; not the standard-mount mate to 023-105-00.
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7K Nev-R-Adjust brake — left023-464-00Self-adjusting 12 × 2-inch left-hand brake. The right-hand version has a separate part number.
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7K Nev-R-Adjust brake — right023-465-00Self-adjusting 12 × 2-inch right-hand assembly, matched by model family to 023-464-00.
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6K brake magnet kit — white wiresK71-105-0012 × 2-inch 6,000 lb electric brake magnet kit. The lead colour identifies this version.
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7K brake magnet kit — black wiresK71-125-0012 × 2-inch 7,000 lb electric brake magnet kit, including compatible Nev-R-Adjust assemblies.
View this partMatch the complete brake assembly
All the following are 12-inch diameter by 2-inch wide electric drum brake families. LH and RH describe the two sides of the trailer. The original 6,000 lb assemblies should not be confused with the 7,000 lb Nev-R-Adjust versions or the nine-hole mounting design.
| Brake family | Left hand | Right hand | Adjustment |
|---|---|---|---|
| 6,000 lb manual, standard mount | 023-105-00 (left) | 023-106-00 (right) | Manual shoe adjustment |
| 6,000 lb manual, nine-hole mount | 023-105-09 (left) | 023-106-09 (right) | Nine-hole configuration — compare mounting flange |
| 6,000 lb Nev-R-Adjust | 023-458-00 (left) | 023-459-00 (right) | Forward self-adjusting |
| 7,000 lb manual adjust | 023-180-00 (left) | 023-181-00 (right) | Manual shoe adjustment |
| 7,000 lb Nev-R-Adjust | 023-464-00 (left) | 023-465-00 (right) | Forward self-adjusting |
The 023-105-00 left brake and 023-106-09 right brake are not a standard left/right pair: the latter has a nine-hole mounting flange. Dexter identifies that distinction in its parts bulletin. Inspect the mounting-bolt pattern and brake specification before buying two assemblies.
Factory exploded brake parts diagrams
Dexter's illustrated light-duty parts catalog shows the brake shoes, lever arms, springs, adjuster, electric magnet and backing plate in their assembled positions. The printed catalog sections for these brakes are:
- Page 68: 6,000 lb manual-adjust electric brake
- Page 70: 6,000 lb Nev-R-Adjust electric brake
- Page 71: 7,000 lb manual-adjust electric brake
- Page 72: 7,000 lb Nev-R-Adjust electric brake
Open Dexter's illustrated parts catalog (PDF)
View the exploded drawing on this page
The complete catalog is a large PDF. For easier zooming on a phone, use the full-size link above and navigate to the printed pages listed here.
Magnets, brake shoes and adjusters
Choose the magnet by exact axle brake model, not by the appearance of its wires alone. The K71-105-00 white-wire magnet kit is Dexter's 6,000 lb 12 × 2-inch service kit; the K71-125-00 black-wire magnet kit is listed for the 7,000 lb 12 × 2-inch brakes, including compatible Nev-R-Adjust models.
| Brake | Magnet kit | Shoe and lining kit | Adjuster part |
|---|---|---|---|
| 6K manual | K71-105-00 | K71-127-00 | 043-004-00 |
| 7K manual | K71-125-00 | K71-127-00 | 043-004-00 |
| 7K Nev-R-Adjust | K71-125-00 | K71-675-00 (left) / K71-676-00 (right) | K71-679-00 |
For a 7,000 lb Nev-R-Adjust brake, the left and right shoe kits are different; select the kit corresponding to your assembly. The manual-adjust shoe kits and the Nev-R-Adjust kits are not the same service package.
Check which return-spring version is installed
Dexter manufactured 12 × 2-inch 6,000 lb and 7,000 lb brakes with both dual return springs and a single return spring. Units built from March 2018 through November 2019 used the single-spring arrangement; the dual-spring layout was used before and afterward. Match the anchor-post and spring design already in your brake when replacing individual components.
See Dexter Product Bulletin 410 with photographs of both spring designs (PDF).
View the spring-design comparison
Before ordering and installing
Check the axle manufacturer's rating plate, the brake's full part number, drum diameter and width, mounting-bolt pattern, and whether it is a manual-adjust or self-adjusting assembly. The trailer's rated axle capacity may be lower than the maximum catalog rating of a brake assembly. Isolate the trailer brake circuit before working on magnets or wiring, and follow Dexter's service instructions for inspection, adjustment, fastening and testing. Brakes are safety-critical components and should be serviced by a qualified trailer technician when their condition is uncertain.
Working on smaller trailer brakes? See our Dexter 10-inch electric brake parts guide for the 3,500 lb and 4,400 lb families.
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