1. Trailer Brakes
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  3. Hydraulic Drum Brakes
  4. 5200 lbs Axle
  5. 6000 lbs Axle
  6. 7000 lbs Axle
Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K

Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K

Item # AKFBBRK-7
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Our Price: $129.56
Trailer Brakes
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Shipping Weight: 29 lbs
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etrailer 12 x 2 Inch Drum Trailer Brakes - AKFBBRK-7
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Free-backing, driver's-side and passenger's-side brakes won't engage when you reverse, even if your actuator is activated. Automotive-grade friction pads and e-coated backing plates are long-lasting. Fit 14.5" to 16.5" wheels. Lowest Prices for the best trailer brakes from etrailer. Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K part number AKFBBRK-7 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (56)
  • Q & A (23)
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etrailer by AxleTek Trailer Brakes - AKFBBRK-7

  • Hydraulic Drum Brakes
  • 5200 lbs Axle
  • 6000 lbs Axle
  • 7000 lbs Axle
  • 12 x 2 Inch Drum
  • 14-1/2 Inch Wheel
  • 15 Inch Wheel
  • 16 Inch Wheel
  • etrailer
  • Free Backing
  • Brake Set

Free-backing, driver's-side and passenger's-side brakes won't engage when you reverse, even if your actuator is activated. Automotive-grade friction pads and e-coated backing plates are long-lasting. Fit 14.5" to 16.5" wheels.


Features:

  • Hydraulic drum brake assemblies are designed for use with a surge-type trailer brake actuator
  • Free-backing design lets you back up without engaging the trailer brakes, even if the actuator is activated
    • Fall-away brake shoes only anchor on drums when brakes are engaged as trailer is moving forward
  • Automotive-grade friction material is molded to brake shoes
    • Pads are fully bonded - not riveted - to shoes for long life and more braking torque
    • Less chance of cracking and crumbling that can lead to mechanical lockup, thanks to tapered edge and circular grinding
  • Periodic manual adjustment required
    • Fine-tooth brake adjustment gears allow for a more precise setting
  • E-coated backing plates resist wear and corrosion
  • Single plunger design
  • Adjuster plugs (included) cover access holes to keep dirt and grime out of the assemblies and off of the shoes
  • Left-hand (driver's-side) brake assembly and right-hand (passenger's-side) brake assembly included
    • Mounting bolts and hardware (BRKH12) sold separately
  • QAI and CSA certified


Specs:

  • Application: most standard hub-and-drum assemblies, including Dexter, Lippert (LCI), and AL-KO
  • Dimensions: 12" diameter x 2" wide
  • Mounting flange bolt pattern: 5 bolt
  • Wheel size: 14-1/2", 15", 16" and 16-1/2"
  • Axle rating: 5,200 lbs, 6,000 lbs, and 7,000 lbs
  • Limited 1-year warranty


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 Brake Assembly

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 free-backing hydraulic brake assemblies has a fall-away shoe, which provides full braking when your trailer is moving forward, but supplies only limited friction when the trailer is moving in reverse. During normal forward braking, the fall-away shoe expands to catch your brake drum. When driving in reverse, however, the fall-away shoe's extra spring will overcome the pressure from the brake cylinder. This keeps the leading edge from catching on the drum, so the shoe will not fully pivot into the drum. This exerts a smaller amount of friction, just enough to provide a minimal amount of braking when in reverse.


These trailer brake assemblies act as part of your trailer's hydraulic braking system. A hydraulic trailer brake actuator is required for these brakes to function.


Thoroughly Tested for Safety

These brake assemblies meet the requirements for certification by the Canadian Standards Association (CSA). The CSA creates standards, which when complied with ensure a safe and quality product. These brake assemblies underwent extensive testing to measure stopping distances when braking. These brakes have also been tested by QAI for braking performance in a complete automotive setup and under real-world conditions to provide the most realistic scenario for the everyday driver.


Automotive-Grade Friction Material

Each shoe on these brake assemblies is lined with automotive-grade friction material for improved stopping performance and longevity. The friction material is fully bonded onto the surface of the brake shoe. This lining is custom-molded for a perfect fit. The edges are tapered to ensure long-lasting performance. This taper, along with the circular grinding that the lining undergoes, helps to prevent cracking and crumbling. This durability helps to prevent mechanical lockup, which can occur when brake shoes are excessively worn or broken.


The friction material is also SAE-N certified, which means that it is an environmentally safe product that complies with California and Washington regulations regarding the composition of brake pads. As a result, this material not only provides high-performance braking that can endure the test of time, but it is also environmentally friendly and safe for use throughout the United States and Canada.



B12H-51 AxleTek 12" X 2" LH Hydraulic Brake Assembly - Free Backing - Drivers Side - 5.2K, 6.0K, 7.0K Axles - E-Coat

B12H-52 AxleTek 12" X 2" RH Hydraulic Brake Assembly - Free Backing - Passengers Side - 5.2K, 6.0K, 7.0K Axles - E-Coat





Video of Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for etrailer Uni-Servo Free Backing Hydraulic Brake Kit Installation

Speaker 1: Today we're gonna be taking a look at the hydraulic brake kit U-Servo 00:00:02 free backing 12 inch left and right hand brake assemblies for five and a half thousand to seven thousand pounds. That's gonna be part number AKFBBRK-7.So here's what our brake assembly's gonna look like. The biggest benefit to our brake assembly here is that it is an entire assembly. We're not gonna have to worry about getting the hardware kit, a wheel cylinder, or anything else. As well as putting on the pads, they are hydraulic brake assemblies, which means they're gonna work with surge-type brake actuators.What's nice about these assemblies is that they have a free backing design. And what that means is, it's gonna let you back up without engaging the brakes, even if the actuator is activated.The fall-away brake shoe is only gonna anchor on the drum when the brakes are engaged, as the trailer is moving forward.The pads are gonna be fully bonded into the shoes and not riveted, which means that they're gonna give it a longer life and more of a bite on those brakes.The tapered edge at the bottom of our pad is gonna help prevent any kind of cracking and crumbling that can lead to a mechanical lock-up.Our brake assemblies are gonna have a fine tooth adjustment gear, and that's gonna allow us to fine tune our brakes, but it is a manual adjustment, so we are gonna have to check our brakes and adjust them periodically.There is gonna be a plug on the back that's gonna help keep out all the dirt and debris from getting inside, and this is right where we're gonna make our adjustments at.Now, the mounting flange bolt pattern is gonna be a five bolt, and it's gonna fit wheels 14 1/2, 15, 16, and 16 1/2 inch.Our brake assembly is gonna work with axles that are rated at 5,200, 6,000, and 7,000 pounds.Now, this is gonna include the left and right hand assemblies, so to start out, we're gonna go ahead and remove our drums so we can pull off this cap.

Just take a rubber mallet, and we're gonna tap it until it can come off. Put the cap aside for now. Now, on the top of the nut here, we're gonna clean some of the grease off, because there's gonna be a retaining clip that's holding it in place. Just take a shop towel and wipe off some of the excess grease so we can find that retaining clip.You're gonna want to grab a flathead screwdriver. There's gonna be a tab that's gonna be in between the two channels here, on the nut itself.

We're gonna bend that tab down, so that we can actually turn the nut and take it off. Now, you want to be careful, because our brake assembly is not gonna come with a retaining nut or washer, so you want to keep this hardware so we can re-install it.Next, we're gonna grab a pair of channel locks and we're gonna grab the nut and just loosely turn it so it'll unlock it. Then we can take it off by hand the rest of the way.Then we can pull off that retaining plate. We're gonna pull this off and set it aside, and then if you need to, again, grab a flathead screwdriver and we're gonna pull that washer off that's right behind it. So we're gonna grab the back of the hub, slowly pull it back, and we'll set the hub aside, as well.So what's gonna be holding our assembly in place is gonna be these nuts right here.

There's gonna be a total of five of them going around the axle shaft. We're gonna be using a 9/16 socket to remove them. Now, again, you want to hold onto the hardware that comes off, because our new brake assembly is not gonna come with hardware.And with the hardware removed, we are gonna have one last point that we're gonna have to pull off before we can pull the assembly out, and that's gonna be right here, where the brake line is actually attached.You need to tilt the assembly out so you can get a wrench in there to loosen that fitting.So we can take our new assembly. We're gonna slide it over the studs. Then we can reinstall those lock washers and nuts back in place.Just gonna put these in there hand tight for now, and then we can come back and tighten them all down.

With all the bolts in hand tight, I'm gonna come back and I'm gonna torque them down.So with this brake assembly in place, we're gonna go ahead and repeat that for the other remaining positions.And that will finish up your look at the hydraulic brake kit for the left and right hand side. And that's gonna be part number AKFBBRK-7.


Customer Reviews

Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K - AKFBBRK-7

Average Customer Rating:  4.9 out of 5 stars   (56 Customer Reviews)

Free-backing, driver's-side and passenger's-side brakes won't engage when you reverse, even if your actuator is activated. Automotive-grade friction pads and e-coated backing plates are long-lasting. Fit 14.5" to 16.5" wheels.

- AKFBBRK-7
by:

Worked perfectly. 686936



- AKFBBRK-7
by:

Got the 12" backing plates, have yet to install them. My past experience with Etrailer has been excellent! I am rebuilding a large boat trailer and they have had everything I needed to complete the job with great videos on how to install each component. They are the gold standard for an online business! 637918



- AKFBBRK-7
by:

The product was very good with minor shipping damage. I believe it would be better to ship in one box per axle instead of four backing plates in one box, that is where the damage came from. Your people were very friendly,& easy to work with. The product was exceptional quality. 588009



- AKFBBRK-7
by:

Very good products no problems thanks for everything 711189



- AKFBBRK-7
by:

Quick delivery, good price, perfect match and fit. Thank you! 636979



- AKFBBRK-7
by:

Ordering was simple, shipping as promised, fit was perfect and products are still in use. Couldn't ask for more. 603166



- AKFBBRK-7
by:

perfect fit 599524



- AKFBBRK-7
by:

Very helpful on the phone and everything ordered fit perfectly! Thanks for all the help. 545610



- AKFBBRK-7
by:

Brake parts were awesome quality.Web site was easy to navigate.Shipping was fast. I highly recommend and will do business again! 543161



- AKFBBRK-7
by:

Great service 499753



- AKFBBRK-7
by:

GOOD PRICE , EXACTLY WHAT I NEEDED , TIME SAVER. 459163



- AKFBBRK-7
by:

My trailer brakes arrived on schedule completely assembled and ready for installation. In 2 hours I had new trailer brakes on my boat trailer working great. Thanks for the great service! 448158


Comments
My trailer brakes are still working great. Havent had to give this repair a second thought. Thanks
David V - 11/01/2018

45267

- AKFBBRK-7
by:

Detailed description and fast delivery 384457



- AKFBBRK-7
by:

perfection from start to finish 367477



- AKFBBRK-7L
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Changing out the brakes on my boat trailer was actually much easier, and cheaper thanks to these guys, than I expected. etrailer.com had every single part I needed and the videos explanations made selection easy. Will bookmark this site for sure. Cheers 572626



- AKFBBRK-7-D
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


The crew over etrailers work their butt off I ordered the wrong 12 inch backing plate with shoes it was already loaded on the truck they went out and pulled it from the truck and did not charge me and reordered and sent the right product it a ride fast 430470



- AKFBBRK-7-D
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Great on phone help….. OK was very impressed that the 2 ladies I talked with on 2 different calls really knew their STUFF. Very impressed and ordered on Sat. del. on Wed. with tracking sent to me. Will be back when I break these in with new salt water. 375750



- AKFBBRK-7-D
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Easiest brake job I ever did! Complete assembly bolted to the trailer in the original position. No fussing around. Connected brake line, bled brakes and was rolling again. With free shipping, I couldn't go wrong. 394802



- AKUBRK-7
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Parts arrived on the date scheduled, the shipper for some reason couldn't find an address that they had delivered to before, this was not any fault of etrailer.com. All parts fit exactly as they should have and now hopefully I will not have to fix someone else's neglect again, as shown in some of my pics. But if I do I will use etrailer.com. Big thanks to Shawn for help above and beyond. 436057



- AKUBRK-7
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Awesome customer service and prices! Will buy all my parts through them in the future 760460



- AKFBBRK-7-D
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


great product and at a great price. 745256



- AKUBRK-7
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Customer service is outstanding!! Excellent value!! I wish there was an etrailer store near me!!! 733700



- AKFBBRK-7-D
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


could not be happier!!! 718091



- AKUBRK-7
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Delivered a day early, exact fit, good deal 711343



- AKFBBRK-7L
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


My parts arrived on time. Great service. Olivia went out of her way to help me correct a order i had previously made.. Thanks for good job well done all around 704786


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Show More Reviews

Ask the Experts about this etrailer Trailer Brakes

  • How To Determine If Your Trailer Has Free-Backing Brake Assemblies When Replacing a Surge Coupler
    To find out if you have free backing brakes, there are really only two ways I can think of to test. First, if your coupler works, you can push your surge coupler to move your trailer in reverse. If the brakes apply, then you know you do not have free backing brakes. If you can move it easily, then your brakes are free backing. If your coupler is broken and thus the reason you are replacing then you will need to go to the second testing option. You will need to pull one of your hubs...
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  • Recommended Electric Over Hydraulic Conversion for Dutchmen Voltage 3818 Toy Hauler Triple Axle
    We do have the ability to convert your Dutchmen Voltage 3818 to Electric over Hydraulic brakes. First you will want the brake assemblies and for those, I recommend the Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K # AKFBBRK-7 (one kit per axle). Then you will need brake lines like the Deluxe Hydraulic Line Kit - Tandem Axle - Drum # 9579-2 along with the Hydraulic Line Kit, 3rd Axle - Drum and Disc # 9579-01. Then I recommend the HydraStar...
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  • Adding Electric Over Hydraulic Drum Brakes to a Trailer
    With 6,000 pound axles they must take 12 x 2 inch assemblies. For a left and right side pair of assemblies you can use # AKFBBRK-7. We do not have an option for self-adjusting brakes in this size with a single-servo design. For an actuator I recommend the Hydrastar # HS381-9066. This unit is rated to 1,200 psi so it provides a little extra kick above the 1,000 psi units. Since you have a couple of 6,000 pound axles you're going to want the best to slow the loaded trailer down. It also...
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  • Replacement 12 inch x 2 inch Hydraulic Trailer Brakes with Parking Brakes
    While we do have a parking brake solution for you, unfortunately you can't add parking brakes to a set like the Hydraulic Brake Kit # AKFBBRK-7 that doesn't come with parking brake levers. Instead you need the kit # T2351300-200 that has parking brake levers included.
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  • Recommended Hydraulic Brake Assemblies, Actuator, And Brake Lines For Dual Axle RV
    For your conversion to hydraulic brakes on your 7,000 lb dual axle RV, I recommend the Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies - 5.5K to 7K # AKFBBRK-7. These assemblies are side specific and are labeled for you. These will work with your current hub and drum assemblies. For installation and adjustment, you will want the Brake Adjustment Spoon for Drum Brakes # W80630. If you need the mounting bolts for these assemblies, I recommend # BRKH12. If...
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  • Free-Backing Uni-Servo Hydraulic 12 x 2-inch Brakes for Military Trailer
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    We carry 12 inch trailer brake assemblies for hydraulic setups. For a set that includes both sides we have the # AKFBBRK-7 which will be a great option. This kit is designed for axles with capacities between 5.5k and 7k.
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  • Replacement Hubs, Brake Assemblies, and Tire/Wheel Combination for Old Trailer With Dexter Axles
    I have replacement hub, brake, and tire/wheel options to replace what you have on your Dexter axle. They will fit the spindle measurements that you sent me of: A is 3" B is 2.125" C is 1.75" D is 1.25" E is 1" The replacement hub and drum assembly that fits that spindle is the Dexter Trailer Hub and Drum Assembly # 42866UC3. With this assembly you will need to purchase the grease seal # GS-2125DL which has the smaller I.D. of 2.125 inches. If you have E-Z Lube spindles on your...
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  • How to Find Replacement Drum Brake Assembly for Boat Trailer
    I can tell you exactly how to find compatible drum brake assemblies, though I took a look and could not find any type of reference to Dico 40511. To determine the brake assemblies that will fit your 2002 Escort boat trailer, you need to know your axle's weight capacity, your mounting flange bolt pattern and the inside diameter and depth of your drum. For example, Hydraulic Brake Kit # AKFBBRK-35-D are rated for 3,500 lb axles, have a 4-bolt mounting flange pattern and measure 10"...
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  • Replacement Axle and 5 Spoke Utility Hubs for Older Triple Axle Trailer
    The Dexter Trailer Hub and Drum Assembly - 6,000-lb and 7,000-lb Axles - 12" - 5 Spoke Utility # 8-174-5UC3 are the only hubs we have with that bolt pattern to fit your wheels. Based on the measurements you gave, you will then use the Dexter Trailer Axle Beam with E-Z Lube Spindles - 89" Long - 6,000 lbs # 8327830. From the sound of where you measured to the center of your tire, any offset if you have one won't be much and will work with this combination. Then if you have electric...
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    To change your electric brakes on your Kaufman trailer to an electric over hydraulic (EOH) system you will need to hydraulic brakes, brake lines, an EOH actuator, a breakaway kit (which you should already have), and a brake controller (which you should already have). I highly recommend going with the HydraStar EOH Actuator # HBA-12 which is one of the best options out there and has received great reviews from other customers. We hardly ever see any troubleshooting questions about these...
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    We can help you with new brakes for your tandem-axle boat trailer that is used in a salt water environment. We offer both electric and hydraulic drum brakes. Electric brakes are more and more supplied as the OEM equipment on boat trailers. This is mostly due to their lower cost and generally far simpler installation than hydraulic brakes. However, we do not have any drum brakes of either type with stainless steel construction. We DO have disc brake kits with stainless components...
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  • Recommended Free-Backing Hydraulic Brakes for Surge Brakes Without Reverse Lockout
    All hydraulic brake drum systems are compatible with free-backing brake assemblies like # AKFBBRK-35-D for 3500 lb axles with 10 inch drums or # AKFBBRK-7 for axles 5.5K to 7K with 12 inch assemblies. The brake lines are run to the brake cylinder that only has a single piston to allow movement in reverse without engaging the brake shoes to stop the trailer. Let me know if you have more specific fit questions.
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    As far as capacity goes you could switch out two 3,500 pound axles for one 7K Timbren Axle-less system such as # TASR7KS01. You would have to place the Axle-Less system right in the middle of where the two axles used to be to make sure the trailer load is properly supported. You will also need different hubs, wheels, and tires since everything will need to be rated high enough on just the one axle. The hub and drum assembly that is compatible is # 42866UC3-EZ. If the trailer has hydraulic...
    view full answer...
  • Recommended Brake Assemblies for 31 Foot Travel Trailer with Tandem Axles
    For axles that are roughly 5,000 lbs each base on your 10,000 lb rating, you will need 12 inch brake assemblies for your 31 foot travel trailer. I recommend the Electric Trailer Brake Kit - Self-Adjusting - 12" # AKEBRK-7-SA. If you have hydraulic brakes, you will want # AKFBBRK-7 instead which is a free-backing brake assembly. These assemblies both work with the standard 5 bolt mounting flange on axles of this capacity level. If you meant that each axle was rated for 10,000 lbs,...
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  • Surge Brake Actuator Compatibility with Free Backing Brakes and Longer Dimensions
    Your Demco Actuating Coupler # 8605001 to replace your Atwood coupler is a great choice even though it is 5 inches longer. As long as you have the 3 inch wide channel tongue and the 6,000 lb capacity is adequate for your trailer it will work just fine. The length of the coupler won't really change the tongue weight or anything else, so no need to be concerned. It will work perfectly with free-backing brake assemblies like # AKFBBRK-7 which are made to engage the same way as usual...
    view full answer...
  • Timbren Axle Less Kit Recommendation for Sea Ray Dual Axle Boat Trailer
    We have Timbren Axle Kits like part # ASR5200S01 that are rated for 5,200 lbs which would work great on a 10k tandem trailer like what you have. Then for hubs we have the part # 8-201-5UC3-EZ which fits the spindles of this axle. Then for free-backing hydraulic drums we have the part # AKFBBRK-7 which would work great with your surge brake system. These are free-backing plates too so your trailer would be able to reverse without having the brakes lock up.
    view full answer...

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Info for this part was:

Edited by:
Lindsey S
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Video Edited:
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