Replacement for Atwood Surge Brake Actuator 85778

Question

Question:

I have an older 2005 ez-Loader trailer. I had new breaks and tires put on recently but the break actuator was not able to be fixed. It says on the unit See owners manual P/N 85778inch and on the side it says its an Atwood. I know they are no longer in business. What should I buy to replace the old one. Thank You.

asked by: Scott C

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Expert Reply:

The replacement I recommend for an Atwood Surge Brake Actuator 85778 is the Demco Hydraulic Brake Actuator part # DM62VR. It has the same ball size, offers a bolt-on install, and has a greater capacity. The only difference is it has an electric lockout as opposed to a manual one.

expert reply by: Conner L

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Answer 1

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…

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Answer 2

Thanks for the photo. That is a great help for getting you the correct replacement. I recommend the Demco Hydraulic Trailer Brake Actuator - Drum Brakes - Zinc Plated - 2" Ball - 7,000 lbs #DM72VR for a zinc plated option. This coupler does…

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Answer 3

The best replacement option we offer for an Atwood Surge Brake Actuator 85778 is the Demco Hydraulic Brake Actuator part #DM62VR. It has the same ball size, offers a bolt-on install, and has a greater capacity. The only functional difference is it…

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Answer 4

Yes, if you inserted a rod into the hole that in front of the housing of the actuator of the part #DM72VR that would work as a manual lock out and allow you to reverse the trailer.

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Answer 5

Reverse lockout solenoids will have two wires as you have seen. One wire is grounded to the trailer and one wire is attached to a reverse light wire coming from the tow vehicle. On most lockout solenoids it does not matter which wire is grounded and…

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Answer 6

Since the break away lever on the top plate activated the trailer brakes on your 1998 Four Winns Trailer it sounds like brake fluid is at least getting sent to your brakes which means the master cylinder is working correctly. Chances are when testing…

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Answer 7

The Atwood 85778 actuator has been discontinued so I recommend the Dexter DX7.5L A-60 Brake Actuator - Bolt On - Drum - 2" Ball - Zinc - 7,500 lbs #DX33FR. If you need a higher capacity, then you will need to use a 2-5/16 inch hitch ball.…

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Answer 8

Your best route is to replace your entire surge brake assembly as Atwood no longer produces any parts for their brake actuators. The Titan Zinc-Plated Brake Actuator #T47457207K is going to be your best replacement available. It is specific to disc…

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Answer 9

Yes, the Dexter Axle Brake Actuator Coupler part #DX56FR is good for towing a trailer up to 7,500 lbs so it would easily work on yours rated for up to 3,520 lbs. This will fit on a straight tongue that is measures 3 inches wide by 5 inches tall. This…

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Answer 10

Demco does not offer a manual lockout for the coupler part #DM72VR but they do offer an electric option with the part #DM5836. They also recommend installing free-backing brake assemblies on the axles instead too which I attached a link to a page…

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Answer 11

The Replacement Bypass Solenoid Valve #DM05561 is normally open letting the fluid flow through it. It will be closed when it is activated.

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Answer 12

I can understand how this can be a bit confusing. Brake actuators, like the Demco Hydraulic Trailer Brake Actuator, #DM72VR, with no lock-out are typically more economical and are perfect for trailers equipped with free-backing brakes because the…

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Replacement for Atwood Surge Brake Actuator 85778

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