Lippert Forward Self-Adjusting Electric Trailer Brake Assembly -- Left Side
A direct-replacement left-hand electric brake assembly engineered for Lippert and compatible 4,400-lb trailer axles. The forward self-adjusting mechanism keeps shoe clearance consistent over time, reducing manual brake adjustment intervals and maintaining stopping performance mile after mile. Part number 2024028246 (vendor/alternate: 09-1394).
Trailer brakes that need constant manual adjustment are a hassle -- and unevenly adjusted brakes are a safety risk. The Lippert 2024028246 uses a forward self-adjusting design that automatically compensates for shoe wear as you drive, keeping the brake shoes at the correct clearance from the drum without requiring you to pull the wheel and adjust a star wheel on a regular schedule.
This assembly is the left-side (driver-side) unit, designed as a drop-in replacement for worn or damaged brake assemblies on trailers with 4,400-lb rated axles. It mounts to a standard 4-bolt brake mounting flange and mates with a 10-inch brake drum.
Automatically compensates for shoe wear during forward brake applications -- no manual star-wheel adjustment needed.
Matches standard 10-inch brake drums used on most 4,400-lb trailer axles from Lippert and compatible axle manufacturers.
Bolts directly to the 4-bolt brake mounting flange on compatible axle spindles -- no drilling or modification required.
Correct driver-side orientation for proper self-adjuster operation. Do not swap left and right assemblies.
This assembly is designed to work with standard electric brake controllers (proportional or time-delayed) found in most tow vehicles. The electromagnet engages when the brake controller sends current through the brake wiring harness, pulling the actuating lever and applying the shoes against the drum.
Verify the following before ordering:
Forward self-adjusting brakes adjust during every forward brake application, not just when backing up (as reverse self-adjusters do). For trailers that rarely reverse -- or for owners who want a lower-maintenance setup -- the forward self-adjusting design provides more frequent, consistent adjustment throughout normal towing use.
Brake manufacturers and axle suppliers recommend replacing electric brake assemblies in axle pairs (both left and right on the same axle) to maintain balanced braking. Mixing a new assembly with a heavily worn assembly on the same axle can cause the trailer to pull to one side under braking. If one assembly is worn out, inspect the opposite side carefully before deciding to replace only one unit.
Installation requires removing the wheel and tire, pulling the brake drum, disconnecting the brake wiring harness connector, unbolting the old backing plate assembly from the spindle flange, and reversing the process with the new assembly. Torque the flange bolts to the axle manufacturer's specification. After installation, verify the brake magnet wiring polarity matches your trailer wiring harness and confirm brake controller output with a brake controller tester or by test-driving on a safe, low-speed surface.
Inspect the brake drum for scoring, heat cracks, or wear beyond the maximum diameter specification stamped inside the drum. A new brake assembly installed against a worn or damaged drum will not perform correctly and will wear prematurely. Replace the drum if it is at or beyond its discard diameter.