3,500 lb right brake assembly023-027-0010 × 2¼-inch right-hand electric drum brake; manual adjustment.
View this partDexter 10-Inch Electric Trailer Brake Parts Diagrams — 3,500 & 4,400 lb
Dexter electric trailer brakes are made in several capacities even when the shoes have the same 10-inch diameter and 2¼-inch width. For common 3,500 lb and 4,400 lb axles, the complete brake assemblies, magnet kits and brake linings are not identical. This illustrated parts guide helps you identify the right components before replacing a worn or damaged brake.
Shop replacement brakes and service components
3,500 lb right brake assembly023-027-00
4,400 lb left brake assemblyK23-462-00Left-hand 10 × 2¼-inch manual-adjust brake with the newer D44 mounting arrangement.
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4,400 lb right brake assemblyK23-463-00Right-hand match to K23-462-00, with manual adjustment and the newer D44 bolt layout.
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Green-wire brake magnet kitK71-104-00Factory magnet kit for the 10 × 2¼-inch 3,500 lb electric brake.
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Black-wire brake magnet kitK71-125-00Dexter kit specified for 10 × 2¼-inch 4,400 lb electric brakes.
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Brake-magnet retaining clip027-009-00Individual clip used with the specified magnet assemblies; check what your magnet kit already includes.
View this part3,500 lb versus 4,400 lb Dexter electric brakes
Both sizes use a 10 × 2¼-inch drum, but the backing plate, brake shoes and magnet vary by axle rating. Match the Dexter assembly number and the axle identification label, not the drum diameter alone.
| Identification | 3,500 lb axle | 4,400 lb axle |
|---|---|---|
| Brake diameter × shoe width | 10 × 2¼ in | 10 × 2¼ in |
| Complete left brake | K23-026-00 (Dexter catalog) | K23-462-00 |
| Complete right brake | 023-027-00; kit K23-027-00 | K23-463-00 |
| Adjustment | Manual | Manual; K23-478/479 are different Nev-R-Adjust models |
| Magnet kit | K71-104-00 (green leads) | K71-125-00 (black leads) |
| Shoe and lining kit | K71-047-00 | K71-672-00 |
| Backing plate (2018-on) | 036-019-10 | 036-019-19 |
Dexter factory exploded parts diagrams
Dexter's light-duty catalog shows the brake backing plate, shoe and lining kit, actuating lever, retractor spring, adjuster and magnet with numbered callouts. Use the 3,500 lb drawing on catalog page 33 or the 4,400 lb manual-adjust drawing on page 36.
Open 3,500 lb diagram (PDF)Open 4,400 lb diagram (PDF)
View the factory exploded drawing here
On a mobile phone, use the PDF links above to zoom into the individual callouts.
Numbered service parts in the diagrams
| Ref. | Component | 3,500 lb | 4,400 lb |
|---|---|---|---|
| 0 | Complete left/right brake | K23-026-00 / K23-027-00 | K23-462-00 / K23-463-00 |
| 1 | Backing plate assembly, 2018-on | 036-019-10 | 036-019-19 |
| 2 | Actuating lever arm | 047-019-05 LH / 047-020-05 RH | 047-019-05 LH / 047-020-05 RH |
| 5 | Brake-shoe retracting spring | 046-056-00 later; 046-009-00 earlier | 046-056-00 later; 046-009-00 earlier |
| 6 | Brake shoes and linings | K71-047-00 | K71-672-00 |
| 7 | Adjuster assembly | 043-004-00 | 043-004-00 |
| 8 | Adjuster spring | 046-018-00 | 046-018-00 |
| 9 | Electric magnet kit | K71-104-00 | K71-125-00 |
| 10 | Adjuster-slot plug | 046-007-00 | 046-007-00 |
How to choose the electric-brake magnet
The K71-104-00 green-wire magnet kit is specified for Dexter's 3,500 lb 10 × 2¼-inch electric brakes. The K71-125-00 black-wire magnet kit is specified for the 4,400 lb version. Dexter also lists K71-125-00 for selected 12 × 2-inch 7,000 lb brakes, but that does not make it a replacement for every 12-inch brake. Compare the existing brake's full number and magnet before ordering.
The magnet kits include the magnet retaining clip; the 027-009-00 retaining clip is also available individually. See Dexter's magnet replacement instructions and illustrated lever-arm assembly.
Brake shoes, springs and adjustment
Dexter specifies K71-047-00 shoes for the 3,500 lb manual-adjust brake and K71-672-00 for the 4,400 lb version. The later assemblies use a single retracting spring in place of the earlier dual-spring arrangement. Follow the exact brake's revision and the matching factory diagram when choosing shoes, springs or small hardware.
K23-462-00 and K23-463-00 are the manual-adjust 4,400 lb brakes. Dexter's K23-478-00 and K23-479-00 are separate Nev-R-Adjust assemblies. Do not treat one model as the other just because the drums have the same size.
Confirm left or right before ordering
Dexter defines left and right as viewed from the rear of the trailer, facing forward. Left is the driver's side and right is the passenger side in a conventional North American trailer. The 023-027-00 is a right-hand 3,500 lb brake; the K23-462-00 is a left-hand 4,400 lb brake, and the K23-463-00 is right-hand. Match the axle rating, bolt pattern, brake size and adjuster style before installation.
Brakes are safety-critical equipment. Follow Dexter's service procedures and torque specifications when removing, adjusting or replacing an assembly. A qualified trailer technician should inspect damaged drums, leaking hub seals or uncertain axle configurations before the trailer returns to the road.
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