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 13" to 15" wheels.
Features:
Specs:
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.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Speaker 1: Today we're gonna take a look at the Demco 10 inch left hand/right hand side free backing hydraulic drum brake assembly for 3500 pound axles, with a galvanized finish. Now, these are marine grade hydraulic drum brake assemblies. They're great for boat trailers. They are designed for use with surge type trailer brake actuators. These assemblies are a sturdy corrosion resistant field construction. If you notice the back is ...
they use galvanized backing plates on it. The spring hardware is all stainless steel. And the wheel cylinder is a zinc plated wheel cylinder. It is a universal wheel cylinder, you can see it has a single plunger design. Now, these brakes are free backing design.
And what that basically means is it'll let you back up without engaging the trailer brake, even if your actuator is activated.And the way they do that is the primary shoe right here is a riveted fall away brake shoe that'll only anchor on the drum when the brakes are engaged and if the trailer is moving forward. In a free backing design assembly, you can always tell by the primary shoe will be a "D", have a "D" design to it. You can see this one, same way. These are manual adjustment brakes. You have to adjust them right down here where the adjustment gear is.
So, you just turn that gear and it'll adjust either in or out. And it does require a periodic manual adjustment.Now, the mounting hardware to install these is sold separately, we do list them on our website. And they're usually listed on this product page as a related product. Now the size on this, they are 10 inches by 2.25 inches. And what that size would mean is the 10 inches is the diameter, that's measured from this shoe all the way over to that shoe.
So if we put the ruler on it, there's your 10 inch diameter. The 2.25 inch would be the width of the pad on the brake shoe. There's your 2.25 inch width. They do have a brake mounting flange bolt pattern of four lugs, four on four inch bolt pattern. The wheel size that'll work on these is 13 inch, 14 inch, and 15 inch. And they are designed for axles rated up to 3500 pounds. So each assembly would be rated at 1750 pounds. And when they're used of both on the same axle, it'll meet the 3500 pound axle rating.Does include both the driver side and passenger side brake assembly. And the last thing I just wanna show you is how to tell what assembly goes on what side. Now, on a new assembly, it'll always have a sticker that'll say right hand or left hand on it. But, if you didn't have that sticker, the best way to tell is just look at the length of the brake pad on the shoe. This pad goes from here to here. This one's from here all the way to here. This is the longer pad. This is the shorter pad. The shorter pad is always your primary shoe. That's made to face the front of the trailer. So that'll tell you that this one is for the right hand passenger side assembly. And this one here is the shorter shoe. And this is gonna go this way, so this'll be the left hand driver side assembly.But that should do it for the review on the Demco 10 inch left hand and right hand side free backing hydraulic drum brake assembly for 3500 pound axles, with a galvanized finish.
Average Customer Rating: 4.9 out of 5 stars (38 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 13" to 15" wheels.Everything looked great when package was received. New brake assemblies bolted right up to the factory flanges and worked perfectly after bleeding the system. 423132
24 yr old boat trailer brake cylinder finally fails. Brake shoes very thin. Every thing rusty and dirty. I look at cylinders only, pads only, then found these! Everything new at reasonable price and delivered on time. First trip found them to be smooth in operation. did not jam on at the last minute like the old ones did. THANKS etrailer. 666529
Very impressed with the speed of shipping. Wow! Very happy with the parts. 678618
2000 ez loader trailer complete brake job. 2 axle torsion suspension. All 4 axles . I ordered 4 complete brake /backing plate assemblies and 4 new hubs. My complete order showed up on time afew days later. After I got the trailer and boat jacked up and started to take things apart I overlooked not ordering the transitional flexible brake lines that go from the hard lines into the back of the brake assembly. After traveling for 30 minutes to a hydraulic brake line shop to have lines made up they told me they did not have the fittings I really needed these lines to get this job done for the weekend to get the boat out on the water. So I called etrailer and was connected to Tiffany who I must say provided the best customer service I've ever experienced she worked with me on getting the correct items and set up next day rush shipping. She even personally made sure that my order got out the door and called me personally to let me know . There aren't too many companies that goes to that length to serve their customers. The next day at 10 a.m. the were delivered to my front door. (From half way across the United States ) . I was trilled to say the least. Thank you etrailer and a special thank you to Tiffany. In customer service for your personal attention and follow up regarding my order. 569949
Steven - 09/29/2019Hey George just got done installing your brake system on my Carkins dual axle boat trailer, what are nice product they went on beautiful no issues whatsoever extremely satisfied following is a picture of before and after , I just bought the boat and trailer and could not believe the condition of the brakes 376565
Perfect fit, I had them installed in 20 minutes. Super fast delivery. 491616
Very pleased with these folks, shipping was very quick and the parts are top notch. 739194
Very happy with purchases 738930
Went on perfectly. They’ve been operating flawlessly for over a year now. 734849
Arrived next day exactly what was descr ibed 723036
VERY COST EFFECTIVE AND EASY SOLUTION TO REPLACE OLD TRAILER BRAKES---STOPPING IS KIND OF IMPORTANT.. 710889
I couldn't be happier with the company and the product. Great website and good customer service. 714918
Good quality. Was easy to install. Third time I have purchased at etrailer always a good experience. Very fast shipping. 706308
Product arrived exactly when promised, opened the box and was very pleased with what I saw. Very nice quality and workmanship, everything looked perfect. It was about an hour and a half worth of work replacing the old brakes in my 1991 Escort boat trailer, and they work perfectly! Very happy! 696416
Brake assy. for my boat trailer fit perfect.Fast delivery and great customer service. 694987
Brakes are asgood as new, product is working great. I have tandem axels and the brakes are working excellent. 688516
part arrived undamaged. Was an exact match to my old brake. Assemble went smooth. Brakes on my tandem axle boat trailer work better than ever. Price was good. Quality was better than the original parts. 679114
Great replacement. Took off the old crud and cleaned up the mount. The new assembly bolted right on. 667705
Fast shipping and excellant product. 664172
Exemplary all around..ease of ordering; prompt delivery; bolt-on installation; follow-up inquiry..Wish all my transactions were as professional.. Only downside.. didn't order everything needed from e-Trailer..will not make that mistake again.. Grateful..Satisfied customer..Thank You! 661896
Great communication and parts came quickly with free shipping. Brakes were easy to install, and great quality. Great experience! 654767
Slid right into place and worked perfectly! I could not be happier. 640925
Brakes are working great 635427
Installed perfectly and functioning well. (be sure to turn old drums) 629097
Easy install great price 615832
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