Free-backing, passenger's-side trailer brake assembly won't engage when you reverse, even if your hydraulic actuator is activated. Galvanized steel resists rust, making the assembly great for boat trailers. Mounting flange has 4-bolt pattern.
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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.
This Demco free-backing brake assembly 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, the 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: 4.8 out of 5 stars (151 Customer Reviews)
Free-backing, passenger's-side trailer brake assembly won't engage when you reverse, even if your hydraulic actuator is activated. Galvanized steel resists rust, making the assembly great for boat trailers. Mounting flange has 4-bolt pattern.Excellent quality. Installed easy with all 4 brakes assembly. Confidentiality!!!! 820448
fast shipping, got the order right . 791290
Delivery was sooner than expected. Packaged properly. Brake assembly was clean and quality parts. Installation was a breeze. Compliments to a well run business 746208
Product fit my trailer perfectly. Was exactly the same as the assembly it replaced, just new and working. The pads on my old assembly were worn down, and the wheel cylinders were seized. One thing that would be nice is some advice on how to bleed this hitch actuated trailer brakes. It's not an easy job, being that a great deal of force is required at the hitch in order to push the fluid through. (Being that it is meant to be actuated by the trailer's weight. I used a piece of lumber propped on the pavement to leverage the hitch in to push the fluid through. Wondering if there might be a better way to do it . . . Great product, fast delivery! 641511
Item is as advertised. It was quicker easier and cheaper to replace the whole backing plate assembly. If I had replaced brake shoes, wheel cylinder, and spring kit I would have spent more money & time. I will use etrailer for all of my trailer needs. etrailer even upgraded my shipping at no extra charge. Thank you for the great service. 585186
I was satisfied with the drums and brake units supplied by Etrailer. The wheel bearings were junk so I trashed them, and repacked the Timkin's that were already on the trailer. I was pleased with the support I received from Etrailer ensuring the correct items were ordered to avoid returns. 547656
Good product that works as it should 432971
Hi The backing plates did not arrive on the day they were going to be here. They were going to be here on the 12th and didnt show up till the 13th. Please do away with the UPS charge of 168.00 dollars. It was going to be next day shipping that didnt happen. Thx for your help Victor Hayton order #105764522 432291
Perfect replacement for my old rusted boat trailer brakes. Assembly was straight forward. Brakes release well in reverse. All I could ask for. 413990
All parts are doing well. There have been no issues with anything. 408757
The hydraulic drum brakes with backer plates, I ordered came on time and fit great. I also installed new bearings and they fit good too. I will use them again when I need more parts. 396145
Exactly what I ordered, will definitely use you again. Thanks 382897
This part fit 100%. I got the best price from etrailer and I'm so happy that I could install it easily. My brake cylinder was leaking and this was the best way to go to replace the whole unit. I will be ordering the other side this year. Thanks etrailer. PS I'm from Canada and shipping wasn't a problem. I live in Vancouver aND ordered it to blaine aND it arrived really fast. Thanks again 380397
Was easy to install and pricing was gre at. 378126
My trailer now pulls and stops great thanks to etrailer !! 366380
having problems with the brakes locking up 363166
This product was reasonably price so I purchased it instead of piece parting it. It made the job much simpler. The only thing we have to do at the one year mark is to check the adjustment I would recommend this product to anyone thinking of rebuilding their trailer brakes. 353125
these replacments for my boat trailer were and are very good and have held up to my standards for me , nice and easy replacment ! 324878
excellent product at a affordable price. will have my tow dolly back like new again. 316024
Hydraulic trailer drum brakes. Received within a few days. Easy to install, not that complicated. Needed a second person to help bleed the brakes. 312589
Product is great, just as described and appears to be very god quality. A few hours later and my boat trailer was like new. Thanks Etrailer and Tommy C!!! 306983
No issues with the install 303155
Great products, great prices and great service. what more can I say? 297004
Great product, quick delivery and easy install! Will definitely order from Etrailer again. 294339
The product is as advertised. Once the hub is off it is only 4 bolts per side and hooking up the brake lines. Could not be easier. Great service and shipping! 293947
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