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Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 9K to 10K

Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 9K to 10K

Item # 23-451

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23-451 - Self Adjust Dexter Axle Accessories and Parts
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  • Trailer Brakes
  • Electric Drum Brakes
  • Brake Assembly
  • Dexter Axle
  • 12-1/4 x 3-3/8 Inch Drum
  • RH
  • Self Adjust
  • 9000 lbs
  • 10000 lbs
12-1/4" x 3-3/8" Passenger's-side electric brake fits 9,000-lb to 10,000-lb axles. Mounting flange has a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fits 15" or larger wheels. Call 800-298-8924 to order Dexter Axle accessories and parts part number 23-451 or order online at etrailer.com. Free expert support on all Dexter Axle products. Guaranteed Lowest Price and Fastest Shipping for Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 9K to 10K. Accessories and Parts reviews from real customers.


  • All Info
  • Reviews (11)
  • Q & A (27)
  • Videos (1)
  • Photos
  • Why etrailer?

Dexter Axle Accessories and Parts - 23-451

12-1/4" x 3-3/8" Passenger's-side electric brake fits 9,000-lb to 10,000-lb axles. Mounting flange has a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fits 15" or larger wheels.


Features:

  • Electric brakes are easier to install and offer more user control than hydraulic brakes
    • Requires only an electric brake controller (sold separately) - no actuator or hydraulic lines necessary
  • Self-adjusting brakes automatically adjust to deliver optimum performance and braking power
    • No need for manual brake adjustments
    • Proper adjustment leads to better brake efficiency and less wear on your tow vehicle's brakes
  • Mounting bolts and hardware sold separately
  • Made in the USA


Specs:

  • Application: most standard hub-and-drum assemblies, including Dexter and Lippert (LCI)
  • Configuration: right hand (passenger's side)
  • Dimensions: 12-1/4" diameter x 3-3/8" wide
  • Mounting flange bolt pattern: 7 bolt
  • Wheel size: 15" or larger
  • Axle rating: 9,000 lbs - 10,000 lbs
  • Limited 5-year warranty


K23-451-00 Dexter Electric Brake Assembly, RH 12-1/4" x 3-3/8" - Self Adjust - 9,000 lbs to 10,000 lbs

Replaces 23-451





This Product Fits The Following Vehicles

2012 - 2012 Dutchmen Classic Travel Trailer 190QB

2012 - 2012 Dutchmen Classic Travel Trailer 196RD

2012 - 2012 Dutchmen Classic Travel Trailer 261BHS

2019 - 2019 Airstream Classic Travel Trailer 30RB

2019 - 2019 Airstream Classic Travel Trailer 30RB Twin




Video of Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 9K to 10K


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




Video Transcript for Dexter Axle Trailer Brakes 23-451 Review

Today, we're going to show you Dexter Self-Adjusting Electric Trailer Brake Assembly for the Right-Hand Side, part number 23-451. This is a 12-1/4" by 3-3/8" brake assembly. We'll measure the diameter across the shoes and there is 12-1/4" x 3-3/8" brake assembly. We'll measure the diameter across the shoes and there is 12-1/2" mark. Then we will measure the width of the shoe and that is 3-3/8". When paired up with the left-hand side, these brakes are good for axles rated at 9,000 and 10,000 pounds.

The assembly uses a 7 bolt mounting pattern. So check your axle and see what brake mount fringe you have. The brake assembly comes with a pair of wire leads that you use for your electrical connections. It doesn't matter which one you use for ground and which one you use for your brake feed as long as you have a good solid electrical connection. As these are electric brakes you don't want to use it on boat or marine trailer applications.

This brake system is also self-adjusting. You'll so need to adjust this summary when you first set it up by rotating the store wheel and getting the proper amount of tension. You when light even amount of drag as you rotate the drum around the shoes. In the future as you back the trailer while applying the brakes, this cable system will pull an activator which will automatically advanced the start wheel to keep the proper tension. We know that this brake assembly is fort right-hand side, because we want to the short shoe facing the further trailer and the longer shoe facing the rear of the trailer.

Through the brake assembly works is as the drum rotates around the assembly and your coil brakes inside the vehicle, this magnet is activated and will stick to the inside of the hub drum. As the drum rotates around its going to drag on this magnet that will pull this arm and then ultimately open up the brake shoes and apply brake pressure. And that does for the Dexter Self-Adjusting Electric Trailer Brake Assembly for Right-Hand Side, part number 23-451.


Customer Reviews

Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 9K to 10K - 23-451

Average Customer Rating:  4.5 out of 5 stars   (11 Customer Reviews)

12-1/4" x 3-3/8" Passenger's-side electric brake fits 9,000-lb to 10,000-lb axles. Mounting flange has a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fits 15" or larger wheels.

- 23-451
by:

Exact fit 360289



- 23-451
by:

Dexter brakes bolted right up and works great 340515



- 23-451
by:

I am completely Satisfied With the Products I received a year ago and have since then order more parts for my fleet needs was impressed with my last order and will continue doing business with this company as long as I live 330295



- 23-451
by:

Fit perfect, and work very Good. 320342


Comments

Thank you for check on you product, it been working very well, and for GOOD quilts service .

David D - 12/09/2017

31599

- 23-451
by:

good price!!! 262931



- 23-451
by:

Found exactly what I needed on website. Great buying experience. Thanks 175840



- 23-451
by:

works great 165858



- 23-451
by:

Perfect is all I can say about this product. Exact match and extremely easy installation. Outstanding customer service, located exact same item from another supplier and the processing the "Lowest Price Pledge" adjustment was received quickly. Cannot say enough about the ease of ordering and fast delivery from etrailer. Will certainly be a returning customer. 152297


Comments

Yes, these items are still performing as expected no issues what so ever.Thanks for checking in.

HLC - 09/28/2015

15291

- 23-451
by:

Great 131619



- 23-451
by:

Good parts and customer service. 126437


Comments

Still working good.

William - 04/22/2015

11012

- 23-451
by:

I WAS VERY PLEASE WITH THE AXEL, IT WAS THE RIGHT PART, FIT PERFECT AND DELIVERY WAS JUST IN THE NICK OF TIME. I AM VERY PLEASE WITH THE OUTCOME AND WILL USE U AGAIN IN THE FUTURE 47417


11
11

Ask the Experts about this Dexter Axle Accessories and Parts
Do you have a question about this Accessories and Part?


  • Replacement Bearings and Seal for Dexter 10k Trailer Hub
  • The bearings you need are # 387A for the inner bearing, # 25580 for the outer bearing, and for the seal # 10-51 since we know you have a 10k Dexter axle. For brake assemblies you'd need the part # 23-450 for the left hand side and part # 23-451 for the right hand side. For a hub you'd need # 8-430-5UC3.
    view full answer...

  • How to Adjust Drum Trailer Brakes Using a Brake Adjustment Tool
  • Yes you can adjust the drum brakes on your trailer. To see how to manually adjust trailer brake assemblies check out the video I attached, fast-forward to the 4:35 mark of the video. Basically you will adjust the brakes out so that there is a slight but constant drag of the pads on the drum when the wheel is turned. I recommend using brake adjustment tool # W80630.
    view full answer...

  • 12-1/4 x 3-3/8 Inch Electric Trailer Brakes for 9K and 10K Trailer Axles
  • There are 2 different sets of 12-1/4 x 3-3/8 inch brake assemblies and the difference between them is the mounting patterns they have. Electric brakes # 23-450 and # 23-451 will bolt to either a 5-hole or 7-hole mounting flange and they are for 9K to 10K axles which is what the hub # 9-44-1 is for. Electric brakes # 23-434 and # 23-435 will bolt to a 4-hole flange. So if you look at the flange your brakes are mounted to now and see just 4 holes in a square pattern you would use...
    view full answer...

  • Need Brake Assembly For Dexter Trailer Hub And Drum - 8,000 lbs Axles - 8 on 6-1/2, # 8-218-9,
  • You mentioned a 12-1/2 inch drum, but Dexter only list a 12-1/4 inch X 3-3/8 inch drum. The parts that I am recommending are for the Dexter Hub and Drum, # 8-218-9, which is the 12-1/4 inch X 3-3/8 inch drum. I have the complete brake assemblies for the Dexter Trailer Hub and Drum - 8,000 lbs Axles - 8 on 6-1/2, # 8-218-9. The complete assemblies would contain the magnets, actuating arms, brake shoes and springs and cast backing plate. If you have the 4 bolt flange the brake assemblies...
    view full answer...

  • Electric Brake Assemblies for a Trailer with Dexter 10,000 Pound Axles
  • It is likely that Dexter brake assemblies # 23-450 and # 23-451 are correct for your 10K Dexter axles. These brakes mount with either a 5 or 7 bolt pattern. And they do have the correct measurements; 12-1/4 x 3-3/8. Take a look at the picture I have included showing the spacing between the mounting holes for this bolt pattern to determine if these brakes will fit.
    view full answer...

  • Electric Trailer Brake Assembly with 6-Bolt Mounting Pattern for 1960 Airstream Tradewind Trailer
  • Some of the older Airstream trailers used unique proprietary components, including brakes. We do not carry any 6-bolt brake assemblies; but we have 4-, 5- and 7-bolt types that can be seen on the link provided, such as Dexter 12-1/4 x 3-3/8-inch brake # 23-450 and # 23-451, which can use a 5- or 7-bolt mount. You will need to first confirm the axle capacity and the diameter and width of your drums to check for a suitable brake. You may be able to find a compatible brake assembly but...
    view full answer...

  • Replacement Brake Assemblies and Hubs for a Dexter Axle SLR D-90
  • The correct hubs you would need for your Dexter D-90 axle is the part # 8-430-5UC3. The D-90 in your axle number designates is a 9k axle. For assemblies you would need part # 23-451 for the right hand side and part # 23-450 for the left hand side.
    view full answer...

  • Are Drums Interchangeable When Replacing Hydraulic Brakes With Electric Brakes
  • I have attached a link to a helpful article that explains all of the components needed for adding electric drum brakes to a trailer. We always recommend replacing all of the components at one time so you are sure everything works well. If you check out your 9-44 drum you currently have and the inside surface shows no signs of wear or damage you can use them when changing from hydraulic to electric brakes. I spoke with my contact at Dexter and they told me that all you would have to replace...
    view full answer...

  • Is the Dexter Electric Trailer Brake Assembly # 23-451 Made in the USA.
  • Yes, the Dexter Electric, Right Hand Side, Trailer Brake Assembly, # 23-451, is manufactured by Dexter in the USA. For the left hand side trailer brake assembly and hardware, you will need part numbers # 23-450, # 7-5, # 38N, and # 38LW.
    view full answer...

  • Width of Brake Pads on 28 Foot Gooseneck Trailer With Dexter 10K Axles
  • To determine which brake assembly you need, measure the width of your brake linings, as shown in the photo I edited for you. If your existing brake shoes measure 4 inches wide, the # 23-438 you mentioned would be an example of a good replacement for you if your existing brake assemblies use 7 mounting bolts (some use 4) and the diameter of the assembly is 12-1/4 inches in diameter when measured from the outside of one brake shoe directly across to the outside of the other shoe as shown...
    view full answer...

  • Replacement Dexter Brake Assembly Recommendation for a 9k Dexter Axle
  • So I was able to pull up some information on your Dexter Axle and based on the 008-232-05 number you listed it looks like you have a 9k rated axle. So for Dexter 9k brake assemblies you would want the part # 23-451 for the right side and part # 23-450 for the left side. These assemblies are 12-1/4 inch by 3-3/8 inch and are self adjusting. These also use a 6 lug bolt pattern to attach to the spindle of the trailer. Check out the review video I attached as well.
    view full answer...

  • Replacement Electric Drum Trailer Brakes for a 10,000 Pound Wells Cargo Trailer
  • The brakes on your Wells Cargo trailer could just be in need of adjustment. On drum brakes you will adjust the brakes so that there is a slight but constant drag of the pads on the drum when you turn the wheel. To see how to manually adjust trailer brake assemblies check out the video I attached, fast-forward to the 4:35 mark of the video. If the trailer has 2 axles then you likely have de-rated 6K axles (5200 pound axles). This size would be 12x2 inches. they mount to a 5-hole mounting...
    view full answer...

  • Hydraulic Drum Brake to Electric Drum Brake Conversion for Gooseneck Trailer w/ 10,000 LB Axles
  • Yes, you can convert the hydraulic drum brakes to electric drum brakes on your gooseneck trailer. I have included the link to all of our electric brake assemblies for a 10,000 lb axle. Just use the filters on the page to see if we have one that will work for you. I do recommend replacing your hub/drum assembly as well because not all hub/drum assemblies will work with both hydraulic and electric brake assemblies. We only offer one option for a 10,000 lb axle and that is part # 8-430-5UC3....
    view full answer...

  • Components Needed To Add Electric Brakes To Heavy-Duty Trailer
  • Many of the axles on trailers have a plate or sticker that lists the capacity and manufacturer. These are the typical round axle diameters based on axle capacity: 1,000-lb - 2,000-lb Axles: 1-1/2 - 1-3/4 inch diameter 3,500-lb Axles: 2-3/8 inch diameter (Can have a 3-1/2 inch diameter, but rare) 6,000-lb - 7,200-lb Axles: 3 inch diameter 8,000-lb Axles: 3-1/2 inch diameter 9,000-lb Axles: 4 inch diameter 10,000-lb Or more axles: 5 inch diameter. If you do not have a brake mounting...
    view full answer...

  • What Gauge Wire Should be Used When Installing Brake Assemblies on a Trailer
  • You want to use at least 10 gauge wire when wiring up brake assemblies like the Dexter Electric Trailer Brake Assembly # 23-451 on a trailer. I attached an FAQ on trailer wiring for you to check out also.
    view full answer...

  • Electric Brake Assembly for Sundowner Horse Trailer
  • We offer both complete electric brake assemblies and replacement parts for them. Often it is more cost-effective to replace the entire brake assembly than to purchase the various replacement parts to repair one but we can help with either option. Brake assemblies are selected based on axle capacity. For example, if your trailer uses a 10,000-lb-rated axle then appropriate electric brake assemblies for that weight capacity are available in two sizes: 12-1/4 x 3-3/8-inch and 12-1/4 x 4-inch....
    view full answer...

  • Electric Brake Assembly Recommendation for a Dexter 10k Axle
  • Yes, you can replace the hydraulic brake assemblies of your trailer with electric ones. It would just be a matter of removing the hubs, removing the old assemblies, installing the correct size/rated ones, and then wiring the assemblies back up to the trailer connector. I attached a help article that covers everything on adding brakes to a trailer as well as a picture of where to measure on your hubs so that you can pick out the correct size assemblies. Since you mentioned that you...
    view full answer...

  • Will Dexter Electric Trailer Brake Assembly # 23-450 Fit Lippert Axle
  • In order to determine whether or not the Dexter Electric Left Hand Trailer Brake Assembly, # 23-450, will fit your Lippert axle, you will need to measure the distance of the mounting points on your brake mounting flange and compare it to the measurements on the picture that I have attached. For Dexter Electric Right Hand Trailer Brake Assembly, you will need part # 23-451.
    view full answer...

  • Weak Voltage Reading at Electric Brakes on Trailer Wired with 12- or 14-Gauge Wire
  • Generally we recommend using 10-gauge wire for a trailer's brake circuit wiring. In some instances, smaller trailers that have small brake assemblies might work properly with 12-gauge wiring but 14-gauge is simply too small for any electric brake circuit. Your 10-inch drum brakes will need a 10-gauge wire for their circuit. We offer 10 Gauge Primary Wire by the foot, part # 10-1-1.
    view full answer...

  • Electric Brake Assemblies for Brake Flanges on 1971 Horse Trailer
  • Electric trailer brakes should be selected based on your axle's weight capacity, which should be listed on a plate or sticker on the axle itself, and of course based on the brake flange mounting pattern. The electric brakes we offer can have 4-bolt, 5-bolt, or 7-bolt mounting patterns. Some have multiple bolt hole patterns, both 4- and 5-bolt such as the Hayes/Alko # 185100, or both 5- and 7-bolt, such as Dexter # 23-451. We do not offer brakes with a 6-bolt pattern, but that does...
    view full answer...

  • Availability of 12x3 Inch Electric Trailer Brakes for a Parker Grasshopper Grain Trailer
  • As you have found, 12 x 3 inch brake assemblies are not available. It is possible though that your drum will accept a different size. If you can measure the width of the inside of the drum (where the pads make contact with the drum) you might find that 12x2 assembly like # 23-105-09 and # 23-106-09 will fit as long as the bolt pattern has the two lower bolt holes closer together than the top 2. And these assemblies are also designed for 6K axles. But I think that what is going to end...
    view full answer...

  • How to Determine What Brake Assembly Goes On What Side of Trailer
  • You referenced the Dexter Electric Trailer Brake Assembly # 23-451 so I will use it as an example. This is a right hand brake assembly, and by that I mean that is goes on the passenger side of the vehicle. The actuating arm (the bracket that the brake magnet attaches to), should go in front of the spindle in relation to the forward direction of the trailer. Another way to look at is that the arm is the front of an "arrow," and it always points towards the front of the trailer. See picture...
    view full answer...

  • How to Know which Side of the Trailer a Drum Brake Assembly Should Install
  • The actuating arm (the bracket that the brake magnet attaches to), should go in front of the spindle in relation to the forward direction of the trailer. Another way to look at is that the arm is the front of an "arrow," and it always points towards the front of the trailer. See picture for further explanation.
    view full answer...


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Info for this part was:

Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Jameson C
Updated by:
Adele M
Expert Research:
Adam R
Expert Research:
Jeffrey L
Updated by:
Sarah W
Updated by:
Alexander C
Photos by:
Stacy F

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