The Lippert 296650 is a fully assembled, bolt-on electric drum brake assembly engineered for the right-hand (passenger) side of trailers running a 3500 lb rated axle. The auto-adjust mechanism corrects shoe-to-drum clearance on every stop, so your braking performance stays consistent and your linings and magnet wear evenly over time -- no manual adjustments required between service intervals.
Electric trailer brakes work by energizing an electromagnet inside the drum assembly. When the brake controller in your tow vehicle sends current, the magnet grips the spinning drum, rotates slightly, and forces the brake shoes outward against the drum surface. The Lippert 296650 refines this well-proven design with an automatic adjuster that takes up slack every time the brakes are applied -- meaning the first stop of the day performs just like the hundredth.
This assembly ships completely pre-built: backing plate, shoes and lining, magnet, adjusting screw, spring, and all associated hardware are included. You are not buying a parts kit -- you are bolting on a finished brake ready to connect to your trailer wiring harness.
The self-adjusting mechanism compensates for lining wear automatically, maintaining correct shoe-to-drum clearance without manual intervention between service intervals.
Arrives pre-built with backing plate, shoe and lining kit, magnet kit, adjusting screw, spring, and all mounting hardware. No assembly required before installation.
Engineered specifically for the passenger (right-hand) side of your trailer axle. Confirm your side before ordering -- a left-hand version is required for the driver side.
Uses a standard 4-bolt backing plate pattern common on 3500 lb trailer axles, making this a direct bolt-on replacement for worn or damaged assemblies on compatible axles.
The 296650 ships as a complete, ready-to-install unit. You will not need to source individual components separately. Contents:
Note: The brake drum itself is not included. This assembly mounts to your existing drum or a separately purchased drum. A brake controller in the tow vehicle is required for operation.
The electromagnet is a wear item in any electric brake assembly. Because the 296650 keeps shoe clearance optimal at all times, the magnet maintains consistent contact geometry with the drum surface, preventing the uneven spot-wear that develops in manually adjusted assemblies that are allowed to run loose. Replacing a single magnet is far less costly than replacing an entire drum and shoe set worn unevenly from poor clearance management.
The 296650 is a direct replacement for worn right-hand brake assemblies on single- and tandem-axle trailers with 3500 lb rated axles using a 10 x 2-1/4 inch drum size. Common applications include: