Free-backing, driver's-side and passenger's-side brakes won't engage when you reverse, even if your actuator is activated. Galvanized steel resists rust, making the assemblies great for boat trailers. Fit 14" to 15" wheels.
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Note: Because free-backing brakes are designed to eliminate nearly all friction between the brake shoes and the drum when you are driving in reverse, a trailer breakaway kit will not be effective should your trailer disconnect from your tow vehicle while you are backing up.
Free-backing brakes let your trailer move in reverse without the brakes being activated by your surge actuator. These brakes are needed if your actuator does not have a reverse lockout, which is a mechanism that ensures that the actuator does not activate when your rig moves in reverse.
Each of these Demco free-backing brake assemblies has a fall-away shoe that is designed to provide full braking action when your trailer is moving forward and to supply only limited friction when the trailer is moving in reverse. This is largely due to the incorporated dual springs at the shoe's pivot point. (One spring sits on either side of the shoe lever, so only a single spring is visible when looking at the brake assembly.)
When your rig is moving forward and you engage the trailer brakes, each fall-away shoe expands normally, with the leading edge of the shoe catching the drum. This occurs because the plunger on the hydraulic cylinder pushes on the shoe lever, forcing the leading edge of the brake shoe into the drum. Once that edge catches, the dual springs at the shoe's pivot point facilitate braking by forcing the rest of the shoe to pivot into the drum. The action of the shoe against the drum provides the friction required for braking.
When you are driving in reverse, however, the hydraulic cylinder and the springs work against one another. Even though the plunger pushes on the shoe lever, the dual springs of the fall-away shoe overcome the pressure from the brake cylinder, keeping the leading edge from catching on the drum and ensuring that the shoe does not fully pivot into the drum. Because the shoe makes only slight contact with the drum, just enough friction is generated so that only a minimal amount of braking occurs when you are in reverse.
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Average Customer Rating: 4.9 out of 5 stars (61 Customer Reviews)
Free-backing, driver's-side and passenger's-side brakes won't engage when you reverse, even if your actuator is activated. Galvanized steel resists rust, making the assemblies great for boat trailers. Fit 14" to 15" wheels.914738
910929
I received this in a timely fashion. I am very pleased with this product. When I apply my truck brakes, I cannot feel my trailer trying to push me. It’s as if I am not towing my tandem trailer at all. 910798
I had to place 2 orders from eTrailer this week. Fair prices on all products ordered - and lightning fast order processing and shipping. Strongly recommend! Will have my boat trailer back on the road in no time. 900487
Excellent product, very fast delivery...faster than estimated. A perfect no hassle fit the first time right out of the box. Very high quality parts that are much better than the original parts. I have done a lot of trailer brakes and these parts were a joy to install, I cannot say enough good things about these parts with out repeating myself 887036
Fast deliver and an exact fit on my Tracker Boat trailer 875807
Nice set of replacement hydraulic brake drums I bought as spares. 872693
Perfect fit! Functions as expected. 866028
863086
Why buy all of the bits and pieces, along with the special tools to assemble it all yourself to a rusted backplate? The whole assembly comes ready to bolt on out of the box, making a difficult brake job quite sim, for barely more money than buying all the parts separately. Excellent quality and fit. Highly recommend! 831774
It was easy to select the trailer brake kit. The dimensions were right there so I could measure what I needed and order. Glad I read the reviews that said to purchase replacement hardware too. Quick delivery And I am all set 829259
They look good I have not yet installed them because Iam waiting for additional parts to fix the trailer 821136
Perfect fit. Excellent quality with the lowest prices around. Received complete order in under 5 days. I found that customer service was extremely knowledgeable of the parts i needed and offered up the 3 options, good, better and best for my boat trailer brake assemblies. I will return to etrailer for all my boat trailer needs. 815779
Easy to install. Made the job a lot faster. Glad I found these 805976
Haven't used them yet because I have to install a new actuator... however these were an exact fit and easy replacement on my 1981 Somerset boat trailer. 805614
Great, quick, service and a bargain. I thought the part only contained one side, because of the inexpensive price! It was too good to include both sides, so I ordered another...I now have 2 sets!! 805334
Customer service can’t be beat. Informative website and well priced quality products 802168
Product was what I expected. Quality was spot on. Installed without a problem. Works like new again. 778808
Quick fast delivery, came in two days. 775954
Shipping time was quick ,direct bolt on, seem to function well. Over all good quality. Used with the Demco Hydraulic Brake Actuator, to complete the restoration of the braking system. 775794
no problems everything fit and works we ll 774810
I bought these right and left hydraulic brake assemblies for my boat trailer at a great price. I received my order one day earlier than promised. Etrailer.com really rocks to satisfy it’s customers. They provided an awesome tracking link for me to review my order’s shipping progress. This is the best tracking link that have ever experienced. Both complete brake assemblies fitted perfectly in place of my old assemblies. On each Brake assembly, I just had to remove the 4 mounting bolts from the axle flange and the hydraulic hose. Then install the new complete brake assembly, tighten the 4 mounting bolts and makeup the hydraulic hose.. This made this brake job a breeze! It was a pleasure doing business with you. Thanks Etrailer.com! 749507
my new brakes arrived in 48 hrs, nice! Left side went on like a breeze. The video on website made me feel like I was getting the right part the first time. Ill tackle the right side tomorrow 746017
Very pleased with these folks, shipping was very quick and the parts are top notch. 739194
Very happy with purchases 738930
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