Recommended Replacement for Atwood Surge Brake Actuator 85778
Updated 10/08/2024 | Published 08/15/2019
Products Featured in This Question
Question:
Hi! The brake lockout knob on my coupler broke off. We never really cared for that coupler so as a complete novice I ordered a different brand figuring I could just swap them. Once I got to the guts I realized I was sadly mistaken. Here are my questions... 1. Can I tow the trailer safely with the broken knob? 2. Where do I find a 85778? 3. Can I use a different coupler? 4. How difficult is it to replace one of these things? Thank you very much for your help! Picture is of the former location of the lockout knob
asked by: Scott C
Expert Reply:
The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you don't put yourself in the situation where you have to back your trailer up.
Since Atwood went out of business there aren't any exact replacements for your coupler but you can use a different brand. The only thing I was able to find online about the 85778 is that it has a 2" coupler, is rated for 6,000 lbs and that it was used for either drum or disc brake applications. I recommend checking out the Demco Hydraulic Actuator # DM72VR for Drum or # DM62VR for Disc brakes. These are rated for 7K and are compatible with a 2" hitch ball. The drum brake option doesn't have a lockout while the disc brake application has an electric lockout. These fit a 3" wide trailer tongue and have bolt holes that are 3" apart on center.
The installation itself is pretty straightforward and I have attached a video of the drum brake actuator being installed that you can reference.
Product Page this Question was Asked From
Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs
- Brake Actuator
- Surge Brake Actuator
- Boat Trailer
- Construction Trailer
- Farm Trailer
- Travel Trailer
- Utility Trailer
- Bolt-On
- 7000 lbs GTW
- 2 Inch Ball Coupler
- 3 Inch Channel Tongue
- Drum Brakes
- No Lockout
- Demco
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs
- Shop: Demco Hydraulic Brake Actuator w/ Electric Lockout - Disc - Zinc - 2" Ball - 7,000 lbs
- Shop: Trailer Wiring
- Article: How to Bleed Your Trailer Surge Brakes
- Video: All About the Demco Hydraulic Brake Actuator-DM72VR
- Shop: Reverse Lockout Solenoid Kit for Demco DA66B and DA70 Hydraulic Brake Actuators - Non-Bypass
- Shop: Dexter Zinc-Plated Brake Actuator - Disc - Multi-Fit Ball - Bolt On - 7,000 lbs
- Search Results: brake actuator
- Q&A: Replacement for Atwood 61101 Brake Actuator
- Search Results: trailer plug adapter
- Shop: Brake Controller
- Shop: Trailer Hitch
- Search Results: 85778
- Q&A: Brake Controller for 2022 Subaru Outback Towing Pop Up Trailer
- Q&A: Replacement for Atwood Surge Brake Actuator 85778
- Search Results: dump trailer tarp
- Video: What to Know About the Demco Hydraulic Brake Actuator-DM72VR
- Shop: Dexter Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7,000 lbs
- Video: Checking Out the Demco Hydraulic Brake Actuator w/ Electric Lockout
- Q&A: How to Replace the Master Cylinder on an Atwood Actuator 85778
- Shop: Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators - Non-Bypass
- Search Results: reverse lockout solenoid
- Shop: Demco DA86 Trailer Brake Actuator - Drum - Zinc - 2" Ball - 8,600 lbs
- Search Results: trailer hitch
- Search Results: airlift 74000ez
- Video: Reverse Lockout Solenoid Kit for Demco DA66B Hydraulic Brake Actuators Review
- Video: What to Know About the Demco Hydraulic Brake Actuator w/ Electric Lockout
- Q&A: Replacement 10" Drum Hydraulic Trailer Brakes for Converting 3,500 lbs Axles to Hydraulic Brakes
- Article: Trailer Wiring Diagrams
- Shop: Suspension Enhancement
on Brake Actuator
Frank P.
10/8/2024
How do I bleed this Atwood 85778