Archived Trailer Guys Questions
Boat Trailering Guys:,
Boat Trailer Guys, I am changing my boat trailer brakes from drum to disc brakes and I'm told I will need to drill and tap the hole in the rear of the drum brake actuator larger to allow for the volume of brake fluid needed for disc brakes. Then I read that it is not recommended to drill a drum brake actuator but instead purchase an actuator designed for disc brakes. My questions....(1) If I go with a new actuator will I need to increase the size of the brake line tubing suppling the fluid to the brakes? (2)Is there a large difference between the two actuators since a new one for my trailer(a 2 5/16" ball) will cost over $300.00 dollars? Thank you in advance. Capt. Barry Aleander
Answered on: 2/2006
Follow the brake manufacturer's recommendations. It may vary from manufacturer to manufacturer. Referencing the manual included in Tie Down Engineerings Disc Brake system, they strongly recommend changing the actuator to a Disc Specific model, or at the very least you will need to have a qualified mechanic remove the check valve from the drum brake actuator that you currently have. This prevents the disc brakes from dragging which will ultimately lead to brake failure and/or a wheel fire. Depending on the age of the trailer and condition of the brake lines, you may want to replace them while you are doing the conversion as a prentative maintenance measure.
Boat Trailering Guys: Mike