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Hydraulic Trailer Brake - Uni-Servo - 10" - Right Hand - 3,500 lbs

Hydraulic Trailer Brake - Uni-Servo - 10" - Right Hand - 3,500 lbs

Item # AKUBRK-35R
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AKUBRK-35R - 10 x 2-1/4 Inch Drum etrailer Accessories and Parts
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Passenger's-side hydraulic drum brake features a single-plunger design. Automotive-grade friction pads and e-coated backing plate are long-lasting. Fits 13", 14", and 15" wheels. Call 800-298-8924 to order etrailer accessories and parts part number AKUBRK-35R or order online at etrailer.com. Free expert support on all etrailer products. Guaranteed Lowest Price and Fastest Shipping for Hydraulic Trailer Brake - Uni-Servo - 10" - Right Hand - 3,500 lbs. Accessories and Parts reviews from real customers.
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  • Reviews (69)
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etrailer Accessories and Parts - AKUBRK-35R

  • Trailer Brakes
  • Hydraulic Drum Brakes
  • etrailer
  • Brake Assembly
  • 10 x 2-1/4 Inch Drum
  • RH
  • Single Servo
  • 3500 lbs

Passenger's-side hydraulic drum brake features a single-plunger design. Automotive-grade friction pads and e-coated backing plate are long-lasting. Fits 13", 14", and 15" wheels.


  • Hydraulic drum brake assembly is designed for use with a surge-type trailer brake actuator
  • 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 gear allows for a more precise setting
  • E-coated backing plate resists wear and corrosion
  • Single plunger design
  • Adjuster plugs (included) cover access holes to keep dirt and grime out of the assembly and off of the shoes
  • Brake mounting bolts are included
    • Nuts and lock washers (BRKH10BS) sold separately
  • QAI and CSA certified


  • Application: most standard hub-and-drum assemblies, including Dexter, Lippert (LCI), and AL-KO
  • Configuration: right hand (passenger's side)
  • Dimensions: 10" diameter x 2-1/4" wide
  • Mounting flange bolt pattern: 4 bolt
  • Wheel size: 13", 14", and 15"
  • Axle rating: 3,500 lbs
  • Limited 1-year warranty

This trailer brake assembly acts as part of your trailer's hydraulic braking system. A hydraulic trailer brake actuator is required for this brake to function.

Thoroughly Tested for Safety

This brake assembly meets the requirements for certification by the Canadian Standards Association (CSA). The CSA creates standards, which when complied with ensure a safe and quality product. This brake assembly underwent extensive testing to measure stopping distances when braking. This brake has 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 this brake assembly 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.

Compare to Dexter 23-313

B10H-42 AxleTek 10" X 2-1/4" RH Hydraulic Brake Assembly - Passengers Side - 3.5K Axles - E-Coat

Video of Hydraulic Trailer Brake - Uni-Servo - 10" - Right Hand - 3,500 lbs

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

Video Transcript for etrailer Trailer Brakes AKUBRK-35R Review

Today we're going to take a look at the 10" Uni-Servo hydraulic trailer brake assembly for 3500 pound axles. This is the right hand or passenger side assembly. This hydraulic drum brake assembly is designed for use with the surge type trailer brake actuators. This one is a Uni-Servo design, you can see it's a single plunger design. The reason they use the Uni-Servo design, it'll still deliver about 20% braking in reverse, it doesn't full lock up your brakes. The size on this is a 10" by 2-1/4" passenger side electric brake assembly.

This 10" and 2-1/4", when they say that size what they're telling you is the measurement, the 10" is the diameter of it. If we take a ruler, measure the diameter you can see there's the 10", and then the 2-1/4" is actually the width of the pad on the shoe. You can see 2-1/4", so 10" x 2-1/4", and this is the passenger side, or right hand side. Now all the new ones will come with a sticker that'll signify that, but if that sticker wasn't there, just a little tip, the easiest way to know what side this goes on is just look at the size of the shoe. If you see the pad on this shoe, the pad size is smaller compared to this one, it's a lot longer pad. The shoe that has the shorter pad on it will always face towards the front of the trailer.

With that if this is the shorter pad, that's the front of the trailer, that'll tell you that this is the right hand or passenger side assembly. Now these brake shoes are lined with an automotive grade friction material. This friction material's fully bonded to the shoe, it's not riveted. It gives you a lot longer life, more braking inaudible 00:01:30. The lining also has tapered edges on the ends, and then they do a circular grinding all along the material to prevent cracking and crumbling that can lead to mechanical lockup. This is a manually adjusted brake, so it does require periodic manual adjustments.

The adjustments are right here on this star wheel, and the nice things is, is they use a fine tooth gear on this star wheel that'll give you a more precise setting, and there is no brake in inaudible 00:01:54 need it when following your initial adjustment. When you go to adjust it, if you turn it over you'll see on the bottom here, there's two holes. They do have the plugs in it, and that's another nice feature on this assembly, is these plugs are included with the assembly. Some of them they don't include those plugs, they just leave the holes open, but you don't really want that. You do want a plug in there to keep any dirt from getting in and damaging your brake assembly.

Remove these plugs, put your adjustment tool or screwdriver in there, and then you just turn this star wheel to get your correct setting for your brakes. Now, the adjuster plugs are included. If you notice also, the mounting bolts are all included. Now the nuts and the lock washers that are used to install this, we do sell those separately and they are listed on this product page as a related product. It is designed to fit the four whole brake mounting flange. This backing plate is e-coated, so that'll help resist wear and corrosion. This whole assembly is certified by US SA standards and CSA, which is the Canadian standards. Again, the dimension on this is 10" x 2-1/4", fits an axle of 3500 pounds, and it is designed to use 10" drums. That should do it for the review of the 10" Uni-Servo hydraulic trailer brake assembly for 3500 pound axles, and this is the right hand or passenger side assembly.

Customer Reviews

Hydraulic Trailer Brake - Uni-Servo - 10" - Right Hand - 3,500 lbs - AKUBRK-35R

Average Customer Rating:  4.9 out of 5 stars   (69 Customer Reviews)

Passenger's-side hydraulic drum brake features a single-plunger design. Automotive-grade friction pads and e-coated backing plate are long-lasting. Fits 13", 14", and 15" wheels.


Got it in 2 days took me 45 min to install price is cheaper then others 718694


The brakes installed without any problems. Such a great price for a perfect fit. 607418


Perfect fit, easy installation 550047


Fit right on my axles. Much cheaper than rebuilding old brakes! Now I need to repair brake lines. Picture of old brake. 539003


Great product fairly easy to install and easy to adjust. Worked so well I am buying the left hand side to do as well to make them both new. 529184


We had a problem with our order, primarily because of some bad information from another trailer parts store, but customer service was extremely helpful and we were able to get the correct part very quickly. Thanks, etrailer, for being so helpful and on top of things. We won't order from anyone else in the future. 511277


good job 489819


To whom it may concern, Loved the product, complete and easy to install, should send new nuts with it ( ad to package price ) Mel S 463226

Everything seems to be working just fine. ! Thanks for asking.
Melvin S - 12/28/2018



Fit right in Fast Shipping Decent quality, especially considering the price. 445552


great product fit like a glove 439417


Parts came to the house fast and bolted right up had the trailer back together in about 10 mins. 435555


Awesome service placed order on Sunday afternoon and selected standard shipping and was up graded at no charge and had my brakes Tuesday afternoon. Got exactly what I ordered sooner than expected, that's always great. 423867


Excellent service ! Chrissy was most helpful and great to work with. She kept me updated with shipping info. I originally tried to get the parts through Trailer World where I bought my trailer, but that was disastrous and a horrible waste of time. Thanks for your help and prompt shipping. 411327


My whole order came fast products looked awesome fit great up and running end of day 389569


parts came within 3 days. fit right on my boat axle. would use them again+++++ 383518


Good God..reliable products, fast service and great people...why would you go anywhere else??? 376494


Great product. Incredible price. Right on time. Local marina wanted 2x the price for just the brake shoes. Etrailer got me the entire assembly fast and low cost. 376011


Parts arrived in excellent condition,fast shipping and I found the pricing was very reasonable. Looking forward to assembling. Will go to Etrailer first for all my needs. 372744


Exact replacement for my trailer with 3500lb. axle. Fit and finish are great, and easy to adjust and bleed the brake cylinder. Would recommend, and would definitely buy products from etrailer.com again. 319718


have not installed yet but look like a perfect fit 294039


These hydraulic surge brake backing plates bolted right up and work great, I purchased both sides. I can now tow knowing that my brakes are working at 100%. 279378


This fit my Shoreland,r boat trailer.Only problem the mounting studs came in fine thread, not the course one,s on the trailer. May want to get 7/16 fine before installing , otherwise happy with the job. 268639


This fit my Shoreland,r boat trailer.Only problem the mounting studs came in fine thread, not the course one,s on the trailer. May want to get 7/16 fine before installing , otherwise happy with the job. 268637


Review from a similar Uni Servo 10 Inch in Accessories and Parts

Great price, perfect fit, just what I needed to replace my rusty and frozen originals...installed but not on the road yet...they got here quick. You will need your original nuts. 570026

The nuts and lock washers are available as part # BRKH10B
Mounting Hardware for 10" Brake Assemblies
. Each set includes 8 nuts and 8 lock washers, enough fasteners to mount 2 brake assemblies.
-- Mike L - 09/29/2018



Review from a similar Uni Servo 10 Inch in Accessories and Parts

Received everything a day before it was due. The trailer is 38 years old and due to your excellent web site I was able to correctly identify the correct part numbers for my trailer. This is the second time I've used etrailer for parts and both times my experience was excellent. 523902

Show More Reviews

Ask the Experts about this etrailer Accessories and Parts

  • Will the 10" Hydraulic Trailer Brakes Fit a 2004 EZ Loader Tandem Axle Boat Trailer
    In order to determine if the Hydraulic Trailer Brake part # AKUBRK-35R for right hand side or part # AKUBRK-35L for left hand side will fit your 2004 EZ Loader Boat Trailer you will first want to confirm that you have hydraulic brakes which is more than likely the case. Then, you will want to know your axle capacity which can be found on the centerline of the axle. These assemblies are rated for use on axles up to 3,500 lbs. Once the axle capacity is confirmed you will then want to measure...
    view full answer...
  • For Dual Axle Trailers Does it Matter Which Assembly Goes on Front Axle or Rear Axle?
    No. There won't be a difference in the # AKUBRK-35R from front to back, but there is a difference between the Left and Right Hand assemblies. This particular brake is for the right hand side (passenger) of the trailer. The corresponding brake for the driver's side would be # AKUBRK-35L or you can buy the complete set with # AKUBRK-35. For dual axle trailers you'll need 2 of each assembly as well as 2 sets of mounting hardware (lock washers and nuts) # BRKH10B since these brakes do not come...
    view full answer...
  • Recommended Hubs and Hydraulic Brakes for Timbren 3,500 Pound Axle-Less System # ASR3500S04
    For hub drums that will work perfectly with the Timbren 3,500 Axle-Less System # ASR3500S04 referenced in your question I recommend the etrailer.com # AKHD-5475-35-K. These hubs are compatible with the spindles on the Timbren system and their 5 on 4-3/4 inch bolt pattern will fit your existing wheels. Then for hydraulic brake assemblies that will work with these hubs I recommend the etrailer.com # AKUBRK-35R for the Right Side and # AKFBBRK-35L for the Left Side. These particular assemblies...
    view full answer...
  • Free Backing Hydraulic Brakes for a 3,500 Lb. Axle
    The Hydraulic Trailer Brake Kit part # AKUBRK-35 (part # AKUBRK-35R + part # AKUBRK-35L) does not have a free backing design. They have a single servo design which means you would need a reverse lockout on your trailer coupler in order to reverse the trailer. Instead, you will want to use the Hydraulic Trailer Brake Kit part # AKFBBRK-35 which does have a free backing design and will allow you to reverse without a reverse lockout.
    view full answer...
  • 3,500 lbs. Axle with Hydraulic Drum Brakes Kit
    I have a solution for you but unfortunately we do not carry any axles that come with hydraulic brakes. What you will need to do is buy the parts separately, but I have all the parts you will need. First, for an axle, you will need the Dexter Axle Beam with EZ Lube Spindles # T3584F-EZ-8974. This axle is 89" long with a weight capacity of 3,500 lbs. which is the same as the # 35545E-ST-EZ-89 Dexter Axle you were looking at. For your Hydraulic Trailer Brake Assemblies you will want...
    view full answer...
  • What Are Mounting Bolt Hole Sizes For Replacement Hydraulic Trailer Brakes
    The hydraulic trailer brake you referenced, Item # AKUBRK-35L, fits 4-bolt flanges with a 2-7/8-inch hole spacing and is suitable for use on a 3500-lb axle. It fits the driver's side and brake mounting bolts are included. For the passenger side, use Item # AKUBRK-35R. Nuts and lock washers are sold separately and are available in brake mounting hardware kit Item # BIK-00 (one kit needed per wheel). I recommend the Brake Adjustment Spoon Item # W80630 as well. Links with additional...
    view full answer...

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Info for this part was:

Installed by:
Jeff D
Updated by:
Sarah W
Updated by:
Alexander C

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