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.
Product Page this Question was Asked From
Demco DA86 Brake Actuator for Disc Brakes w/ Lockout, Solenoid, and Cover - 2" Ball - 8,600 lbs
- Brake Actuator
- Surge Brake Actuator
- Boat Trailer
- Travel Trailer
- Utility Trailer
- Bolt-On
- 8600 lbs GTW
- 2 Inch Ball Coupler
- 3 Inch Channel Tongue
- Disc Brakes
- Manual Lockout
- Demco
more information >
Featured Help Information
Instructions
Continue Researching
- Q&A: Looking For A Demco DA86 Actuator For Drum Brakes Specifically
- Q&A: Solution for Needing Replacement Caliper for Kodiak 204 Caliper
- Q&A: Reverse Lockout Solenoid For Dexter DX12.5 Actuator
- Q&A: Replacement Disc Brake Caliper for Reliable CL-1000
- Q&A: Replacement 250-031468 Seals Needed for Reliable Oil Bath
- Q&A: Replacement Reliable CL-1000 Calipers for Hydroglide Trailer
- Q&A: Replacement for Atwood 61101 Brake Actuator
- Article: Trailer Wiring Diagrams
- Article: How to Bleed Your Trailer Surge Brakes
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Article: How to Tell the Weight Rating of a Trailer Axle
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Trailer Lighting Requirements
- Article: Trailer Maintenance Schedule
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!