Tie Down Drum Brakes - Manual (Page 2)

If your trailer is equipped with hydraulic drum brakes, the brakes are activated by
the surge actuator/coupler located on the front end of the trailer tongue. When the tow
vehicle stops, the trailer pushes into the tow vehicle, compressing the master cylinder
that is located inside the actuator. The master cylinder forces brake fluid to the drum
brakes. Inside each drum brake is a wheel cylinder that expands with the surge of
brake fluid, pushing the brake shoes against the inside of the brake drum.
Drum brakes must be periodically adjusted. Recommended service intervals are after
the first 500 miles and then every 1000 miles. Drum brakes also must be flushed when
submerged in saltwater or towed in road conditions where salting of the roads is done
to improve driving conditions.
Many marine and trailer accessory companies offer drum brake flush kits. If you use
your trailer in these conditions, it is recommended that you install a flush kit, if your
trailer did not come equipped with the flush kit.
Drum Brake Information
Model 660 Drum Brake Actuator
Part #82400
Trailer Brake Flush Kit
Part #81107
Single Axle Brake Line Kit
Part #80326