Can Demco DM78CV Brake Actuator Fit A Big Tex 70TV Tandem Axle Trailer?

Updated 08/15/2025 | Published 07/21/2025

Question:

Will this work with the drum brakes on my dual axle Big Tex 70TV? – Mario

asked by: Mario

Expert Reply:

Hey Mario, it might work. That Big Tex trailer seems to have electric drum brakes from the factory, and the coupler seems to be channel mount and not a standard tongue mount.

If you swapped to hydraulic brakes and you have a 3" wide tongue, then yes you can install the Demco Drum Brake Actuator # DM78CV. You'll just need to doublecheck what I mentioned previously.

This actuator is rated for 8,600 lbs and works great with tandem axle hydraulic drum brake setups. One last thing to do is make sure your coupler fits a 2" ball.

If this doesn't make sense, feel free to provide some more info in a comment on this page, or send in a picture of your setup.

expert reply by: Andrew N

Andrew N.

8/15/2025

Hey Mario, did you get a chance to check if your Big Tex trailer has a 3 wide tongue and if the coupler fits a 2 ball? I'm here to help if you need any more guidance!