1. Trailer Brakes
  2. etrailer
  3. Hydraulic Drum Brakes
  4. 5200 lbs Axle
  5. 6000 lbs Axle
  6. 7000 lbs Axle
Hydraulic Brake Kit - Uni-Servo - Free Backing - Dacromet - 12" - Left/Right Hand - 5.2K to 7K

Hydraulic Brake Kit - Uni-Servo - Free Backing - Dacromet - 12" - Left/Right Hand - 5.2K to 7K

Item # AKFBBRK-7-D
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Trailer Brakes
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etrailer Hydraulic Drum Brakes - AKFBBRK-7-D
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Marine-grade, free-backing hydraulic drum brakes won't engage in reverse, even if your actuator is activated. Automotive-grade friction pads are long-lasting. Dacromet-coated backing plates resist rust. Fit 14-1/2" to 16-1/2" wheels. Lowest Prices for the best trailer brakes from etrailer. Hydraulic Brake Kit - Uni-Servo - Free Backing - Dacromet - 12" - Left/Right Hand - 5.2K to 7K part number AKFBBRK-7-D can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (64)
  • Q & A (16)
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  • Why etrailer?

etrailer by AxleTek Trailer Brakes - AKFBBRK-7-D

  • 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

Marine-grade, free-backing hydraulic drum brakes won't engage in reverse, even if your actuator is activated. Automotive-grade friction pads are long-lasting. Dacromet-coated backing plates resist rust. Fit 14-1/2" to 16-1/2" wheels.


Features:

  • Marine-grade hydraulic drum brake assemblies are great for boat trailers
    • Designed for use with surge-type trailer brake actuators
  • 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
  • Dacromet coating on backing plates offers superior corrosion resistance
    • Ideal for use on a boat or snowmobile trailer
    • Durable enough for saltwater applications
  • Stainless steel springs are durable and rustproof
  • Aluminum hydraulic cylinders resist rust
  • 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-73 AxleTek 12" X 2" LH Hydraulic Brake Assembly - Free Backing - Drivers Side - 5.2K, 6.0K, 7.0K Axles - Dacromet Coat

B12H-74 AxleTek 12" X 2" RH Hydraulic Brake Assembly - Free Backing - Passengers Side - 5.2K, 6.0K, 7.0K Axles - Dacromet Coat






Customer Reviews

Hydraulic Brake Kit - Uni-Servo - Free Backing - Dacromet - 12" - Left/Right Hand - 5.2K to 7K - AKFBBRK-7-D

Average Customer Rating:  4.9 out of 5 stars   (64 Customer Reviews)

Marine-grade, free-backing hydraulic drum brakes won't engage in reverse, even if your actuator is activated. Automotive-grade friction pads are long-lasting. Dacromet-coated backing plates resist rust. Fit 14-1/2" to 16-1/2" wheels.

- AKFBBRK-7-D
by:

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:

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:

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



- AKFBBRK-7-D
by:

After the old backing plate was removed from my 20 year old boat trailer, the installation of the new backing plate and break assemble took less then one hour . The drum with the bearings installed slid right on . 852070



- AKFBBRK-7-D
by:

Product was as described. Went in easy and fit perfect. 821258



- AKFBBRK-7-D
by:

Purchase these units as part of my trailer overhaul. These bolt on in the original holes without a problem, very easy to install, added new kodiak brake lines and new drums, very pleased thus far with the product. like it's all one easy set up. I was going to buy new brakes and associate parts but after seeing these and the price I chose this route after than busting my knuckles trying to mess with springs and stuff. highly recommend 809207



- AKFBBRK-7-D
by:

great product and at a great price. 745256



- AKFBBRK-7-D
by:

could not be happier!!! 718091



- AKFBBRK-7-D
by:

First time order with etrailer.com and can't say enough about the experience. The website is top-notch, from excellent product description video presentations, easy order process and even visuals to provide shipping progress. Excellent assistance on product application and great follow-up customer service. Will not hesitate to order from etrailer in the future. Brakes are excellent quality and build and perfect fit. 661885



- AKFBBRK-7-D
by:

All parts fit and worked as listed in the catalog. 644890



- AKFBBRK-7-D
by:

Good quality parts and materials and/or coatings that will resist the salt water corrosion. Easy swap in for the old parts. I was replacing a set where one brake pad was cracked (the new ones are bonded instead of riveted) and one where the hydraulic cylinder had blown out and drenched everything in brake fluid. Well worth the cost and well worth the additional cost for corrosion resistance if you launch in salt water. 588833



- AKFBBRK-7-D
by:

I was initially concerned about finding the right parts as the trailer was fairly old. etrailer had just what I needed. The website is so elegant. I was able to find the right parts quickly and with comparative options to make a final selection. The how-to videos are great. This made installation a little more comfortable. Especially when you do not perform this type of work every day. The parts were of high quality and are working as expected. I highly recommend etrailer for any of your trailer needs. 544906



- AKFBBRK-7-D
by:

You guys (Meghan this time) are always incredible. Thank you! 541887



- AKFBBRK-7-D
by:

Product arrived, looks great. will be installing on a Workforce man lift. Thank you for quick delivery. 439711



- AKFBBRK-7-D
by:

I received some great advice and help from Leeza in selecting the correct product for my needs. Without serial numbers or identifiable model numbers on my existing trailer parts, she was able to determine the correct parts for my particular trailer needs (on a 25 year old trailer.whose manufacturer is no longer in business). I received the parts in the time span indicated upon ordering, and they fit perfectly. A good experience all around. 410338



- AKFBBRK-7-D
by:

Bent pins on one assembly and had to be removed to straighten before installation. Seems to have been dropped some time during shipping or handling. 402187



- AKFBBRK-7-D
by:

The delivery was good and so was the pr oduct 390787



- AKFBBRK-7-D
by:

I Purchased hydraulic drum Brakes - Uni-servo backing plates form Lisa D at etrailer. I could not be more pleased. The items arrived when they were supposed to and were exactly what they were supposed to be. Lisa was very professional and knowledgeable, and followed up through email. I needed the items fast, and even after priority shipping, the cost was less than i could have found elsewhere. I will use etrailer again should the need arise. 366544


Comments
I am very pleased with the brake system. It is installed and functioning very well on a heavy duty equipment trailer which is often called upon to haul in excess of 10,000
Jeff B - 04/16/2018

37317

- 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
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Worked perfectly. 686936



- 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



- AKFBBRK-7L
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Great product for full brake, bearing and drum replacement. Easy to install and has been working fantastic for a year now. 855859



- AKUBRK-7
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


Brakes are excellent, easy to install. 828933



- AKUBRK-7
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


The product was well worth the purchase. Replacing the brake shoes system a one stop shop and saved time. Also the customer service at etrailer was above reproach!!! 808112



- AKUBRK-7
by:

Review from a similar FreeBack 12 Inch in Trailer Brakes


The brake plates came fast and was the exact match to what I had. 797534


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Ask the Experts about this etrailer Trailer Brakes

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    We do have everything you need to convert to 12" electric over hydraulic drum brakes for your boat trailer: - Hydraulic Brake Kit 12" - Free Backing # AKFBBRK-7-D - Mounting Bolts and Hardware for 12" Brake Assemblies # BRKH12 - HydraStar Vented Marine Electric Over Hydraulic Actuator for Drum Brakes # HS381-8065 - HydraStar Hydraulic Brake Line Kit - Tandem Axle # HS496-252 - Breakaway Kit with Built-In Battery Charger # 50-85-313 - Titan Zinc-Plated Straight-Tongue Coupler # T4853100 The...
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  • Replacement Hydraulic Brakes for a 10K Boat Trailer
    Thank you for the info! I believe that you are correct and you have 2 axles with about a 5K weight rating. With that being the case it means for replacement surge brakes you need 12" brakes. If you use drum brakes then I recommend the Kit # AKFBBRK-7-D because they have a Dacromet finish that will them last longer in regards to water exposure. If you happen to have disc brakes then I recommend the Kodiak Disc Brake Kit # K2HR526DS because it uses a combination of Dacromet finish and...
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  • Troubleshooting Brake Adjustment Wheel that Wont Adjust with Brake Spoon
    It looks like your adjustment star wheel is fully retracted to the point it might be too tight to adjust with a brake spoon like # W80630. With the hub off see if you can get the star wheel to break free so that it can start to adjust out. Maybe try grabbing the star wheel with a set of channel locks to really get decent leverage on it. You should be able to see the inner threads like in the picture I attached.
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  • Replacing Hydraulic Drum Brakes on 1991 EZ Loader Boat Trailer
    To determine the correct hydraulic drum brakes to replace those on your 1991 EZ Loader two axle boat trailer, you will want to measure the drum behind the wheels. Based on the pictures you sent and the information you provided, the axles on the trailer are most likely either 3,500 or 5,200 pound axles. Using this, along with the the fact that the axle has a 5 bolt mounting flange, the compatible replacement is most likely going to be hydraulic brakes rated for 5,200 pound axles. I...
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  • Replacement Backing Plates and Brake Lines for an EZ Loader Boat Trailer
    Thanks for the photo! I called EZ Loader and they were able to give me the information I needed based on your VIN. In order to replace the backing plates you are going to want to use the Hydraulic Brake Kit part # AKFBBRK-7-D. In order to replace the drums you are going to want to call EZ Loader directly as we do not carry the correct ones for your trailer. However, if you just need the bearings you can use part # LM67048 for both the inner and outer. If you are also looking to replace...
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  • Availability of 12 inch Surge Brake Assemblies
    We do have 12 inch drum brake assemblies that are designed for surge brakes like the part # AKFBBRK-7-D that is Dacromet coated and comes with a left and a right hand assembly.
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  • Are New Hubs/Drums Required To Use the Hydraulic Brake Kit AKFBBRK-7-D
    If you replace the braking assemblies with the same size you currently have then you won't need new hubs and drums as well. The Hydraulic Brake Kit part # AKFBBRK-7-D measures 12" diameter x 2" wide which is standard for a 5,200 lb - 7,000 lb axles so as long as that is what you have then you won't need to replace the hubs and drums as well.
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    For your triple axle boat trailer with electric over hydraulic brakes that is rated for 12,000 lbs I recommend the Hydraulic Brake Kit # AKFBBRK-7-D because they are dacromet coated which means they are going to resist rust, which is perfect for use on a boat trailer. These brakes measure 12" diameter which is the size you said you needed (they are also 2" wide) and will fit a 5-bolt brake mounting flange. The only thing you will need are Mounting Bolts and Hardware for 12" Brake Assemblies...
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  • Selecting Replacement Free-Backing Hydraulic Brakes for Tandem 6K Trailer
    Trailer brakes are left- and right-hand specific but not front and back. So for a tandem 6K axle setup you'll use two left-hand and two right-hand 12 x 2-inch free-backing hydraulics brake assemblies. For a high value-for-the-dollar option I like the AxleTek brake pair # AKFBBRK-7-D. All choices are shown on the linked page. We label our brakes left and right, but you can always use the rule that the shorter of the two brake pads on the assembly should face forward.
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  • Hydraulic Drum Brake Actuator and Brakes for Dexter 8-201 Hub and Drum on Boat Trailer
    I have added a link to a help article on everything you need to replace (or add) hydraulic drum brakes, but let's start with the actuator. What you need to know is the weight capacity you need, the hitch ball size you are coupling to, and the size of your channel to mount the coupler (though there are also couplers for A-frames, though it doesn't sound like that's what you have). For example, the Demco Hydraulic Trailer Brake Actuator - Drum Brakes # 8605001 has a 6,000 lb capacity,...
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  • Brake Kit and Hub/Drum Assembly Needed for 1994 Four Winns Single Axle Boat Trailer
    Since the spec sheet said 4,740 lbs per axle and you have 6 on 5-1/2" lug patterns I think it's safe to assume that brakes and hub/drums rated for a 5,200 lb axle would fit, but I would still try to double check on your end just to be sure. There should be an axle tag in the middle of your axle that says the exact weight rating. For a 5,200 lb axle you'll use the following: Electric Brakes - # AKEBRK-7-D Hydraulic Brakes - # AKFBBRK-7-D Hub and Drum Assembly - # AKHD-655-6-EZ-K...
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    Based on my research, your Karavan US-4100-78-SSB-ST trailer uses standard 12" x 2" drums, so for a set of hydraulic brakes, I recommend the Hydraulic Brake Kit - Uni-Servo - Free Backing - 12" - Left/Right Hand Assemblies part # AKFBBRK-7 (black powder coat finish) or part # AKFBBRK-7-D (dacromet finish). These are compatible with 5,200 lb, 6,000 lb and 7,000 lb axles. For the mounting bolts and hardware, you can use part # BRKH12.
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  • Grease Seal with ID of 2.13 Needed for Hub and Drum Assembly # AKHD-655-6-EZ-K
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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
Updated by:
Sarah W
Written by:
Alexander C

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