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Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 10,000 lbs

Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 10,000 lbs

Item # 23-439
Retail:$459.99
Our Price: $360.54
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Accessories and Parts
Shipping Weight: 20 lbs
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23-439 - 12-1/4 x 4 Inch Drum Dexter Trailer Brakes
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12-1/4" x 4" Passenger's-side electric trailer brake assembly fits 10,000-lb axles. Mounting flange has 7-bolt pattern. Self-adjusting brakes require little maintenance. Fits 15" or larger wheels. 1-800-940-8924 to order Dexter accessories and parts part number 23-439 or order online at etrailer.com. Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 10,000 lbs. Accessories and Parts reviews from real customers.
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  • Reviews (5)
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Dexter Accessories and Parts - 23-439

  • Trailer Brakes
  • Electric Drum Brakes
  • Brake Assembly
  • 12-1/4 x 4 Inch Drum
  • Dexter
  • RH
  • 10000 lbs
  • Self Adjust

12-1/4" x 4" Passenger's-side electric trailer brake assembly fits 10,000-lb axles. Mounting flange has 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 4" wide
  • Mounting flange bolt pattern: 7 bolt
  • Wheel size: 15" or larger
  • Axle rating: up to 10,000 lbs
  • Limited 5-year warranty


K23-439-00 Dexter Electric Brake Assembly, RH 12-1/4" x 4" - Self Adjust - 10,000 lbs

Replaces 23-439





Customer Satisfaction Score:


Customer Reviews

Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Right Hand - 10,000 lbs - 23-439

Average Customer Rating:  4.8 out of 5 stars   (5 Customer Reviews)

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

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Quality and communication with this co. Great! Will definitely buy here again ...Thanks E-Trailer!



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5
5

See what our Experts say about this Dexter Accessories and Parts

  • Rear Axle Brakes on Tandem 5th Wheel Trailer Run Hotter Than Brakes on Front Axle
    Electric drum brakes such as the Dexter # 23-439 that you referenced should always be adjusted so that there is a slight drag on the hubs when you rotate the wheel by hand. You should be able to hear and feel this slight drag when the brakes are NOT applied. There is no "rule" that front and rear axle brakes should be adjusted differently. Ideally all brakes will share the load as evenly as possible. There are a few possibilities to explain the higher heat you're finding in your rear axle's...
    view full answer...
  • Electric Brake Assembly For Tandem 10k Dexter Axles
    For your tandem Dexter 10,000 pound axles, you will want to use the Dexter Electric Trailer Brake Assembly # 23-438 for the left hand assembly, and the Dexter Electric Trailer Brake Assembly # 23-439 for the right hand assembly. These are self adjusting brakes that require little maintenance.
    view full answer...
  • Adjusting Dexter 10K Electric Trailer Brakes
    The Dexter 10K electric brakes # 23-439 (right side) and # 23-438 (left side) will have to be manually adjusted using the adjustment wheel below the magnet. To adjust the brakes you will use a small screwdriver or similar tool to turn the adjustment wheel. The wheel pushes out the shoes. You will keep turning the wheel until the pads lightly, but consistently, drag on the drum. The brakes should be adjusted like this anytime you notice braking starting to weaken. I have included a link...
    view full answer...
  • Will Dexter 12-1/4 x 4-Inch Left-Hand Electric Brake # 23-438 Fir 10K Dexter Axle D1012
    The brake assembly you referenced, Dexter 12-1/4 x 4-Inch Left-Hand Electric Brake # 23-438, is indeed rated for 10K axles. This brake matches up to Right-Hand brake # 23-439. You can check for fit on your existing axle's brake flanges by checking the mounting bolt pattern. Both of these brakes use a 7-bolt mounting pattern. As long as your drums are 12-1/4 x 4-inches and your brake flanges use the 7-bolt mounting pattern these will work great as replacements.
    view full answer...
  • How To Adjust Dexter Electric Trailer Brake Assembly
    The Dexter Electric Trailer Brake Assembly, # 23-438 (left side) # 23-439 (right side) when first installed require manual adjustment. Simply use a small screwdriver or similar tool to turn the adjustment wheel to push out the shoes. You will keep turning the wheel until the pads lightly, but consistently, drag on the drum. I've linked a video below, you can jump to the 4:40 mark for adjustment.
    view full answer...
  • Do Dexter 10k Brake Assemblies Fit 10k Lippert Axle
    Yes, the Dexter 10k brake assembly part # 23-439 does fit a 10k Lippert axle. This is the right hand passenger side. The left hand side would be the part # 23-438.
    view full answer...
  • Are The Dexter Trailer Hub and Drum Assembly # DX68QR Sold as a Set Or Individual Quantity?
    The Dexter Trailer Hub and Drum Assembly # DX68QR is for a single hub. These are not sold as pairs as they do not always have to be replaced as a set. We do offer the brakes for this either as a Set # 23-438-439 or the Left # 23-438 and Right # 23-439 separately.
    view full answer...
  • After Changing Bearings the Electric Trailer Brakes No Longer Work
    You will want to check the wiring to the magnets to see if something got disconnected when you were replacing the bearings. Make sure that the ground wires are attached to clean and corrosion free bare metal surfaces. Also make sure the power wires to the magnets are not pinched or in need of repair. If the magnets are getting power (which you can check using a circuit tester such as # PTW2993 while someone activates the manual override on the brake controller) then it could be a different...
    view full answer...
  • Left & Right 10,000 lb Self-Adjusting Dexter Electric Brake Assemblies
    Yes, the part you mentioned is indeed an electric brake assembly, the 10,000 lb self-adjust Dexter brake assembly. That is the left hand side (driver's side), and the following are the part numbers for the left and right side assemblies: - Left Hand (Driver's) Side: Dexter Electric Trailer Brake Assembly - Self-Adjusting - 10,000 lbs # 23-438 - Right Hand (Passenger's) Side: Dexter Electric Trailer Brake Assembly - Self-Adjusting - 10,000 lbs # 23-439 To mount these you will need the...
    view full answer...
  • Replacement 12-1/4 x 4 Inch Brakes for 10,000 Pound Dexter Trailer Axles
    If your drums are 4 inches wide where the brake shoe pad makes contact with the inside of the drum then you will need 12-1/4 by 4 inch brakes # 23-438 for the left and # 23-439 for the right. If you are measuring the overall depth of the drum then you likely need the 12-1/4 by 3-3/8 assemblies such as # AKEBRK-10L which would fit on Dexter axles.
    view full answer...
  • How To Adjust Brakes When The Shoes Are Too Far Apart To Get A Drum Back On
    The Dexter Self-Adjusting Brakes you have ( # 23-450-451) can actually be adjusted when removing and reinstalling, so you will not have to use a sledge hammer again. You will need to go to the back side of the brake to get access to the adjuster, which I included a picture of for reference. Using a slot screwdriver, or a brake adjuster spoon like the # W80630 if you have one, you will need to back it off a little at a time until the drum slides on. I also included an article that has...
    view full answer...
    Image 1 for Image 2 for
  • Trailer Brake Magnets for Dexter 10k Axles
    Not all trailer brake magnets are the same, but since we know you have a Dexter 10,000 lb trailer axle the correct magnets would be the part # BP01-301 which would be correct for the brake assemblies # 23-438 and # 23-439.
    view full answer...
  • Replacement 10,000 Pound Capacity Electric Trailer Brake Assemblies For A Travel Trailer
    We have the perfect replacement brakes for you! The Dexter Electric Trailer Brake Assembly # 23-438 (Left Hand) and The Dexter Electric Trailer Brake Assembly # 23-439 (Right Hand) are the correct replacement for you. The brakes are self-adjusting and will automatically adjust to deliver optimum performance and braking power. The brakes have a diameter of 12-1/4 inches and are 4 inches wide. They have a 7 bolt mounting flange bolt pattern. The Brake Mounting Bolt(s) # 7-116, Mounting...
    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...
    Image 1 for
  • 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...
    Image 1 for
  • Brakes and Hub and Drum Assembly Replacement for Dexter 10K Axles
    It sounds like you have 10K axles, in which you can use the Dexter Electric Trailer Brake Assembly - Self-Adjusting # 23-439 for the right hand side, and # 23-438 for the left hand side. For brake drums / hub assembly you can use the Dexter Trailer Brake Drum for 10,000-lb Axles # 9-27-1 with the Dexter Trailer Idler Hub Assembly for 10,000-lb Axles # 8-214-5UC1.
    view full answer...
  • How to Determine Correct Replacement Axle, Bearings & Brakes For Big Tex Trailer
    We can help tell you how to determine the correct replacement axle, brakes and bearings for your Big Tex trailer but have no way of knowing exactly what you need. In order to choose the correct replacement axle for your trailer you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center; I have added a link below to a video which walks you through how to measure. The other thing you need to know is the weight capacity of the axle you...
    view full answer...
  • Bearings, Seal, & Electric Brakes For Big Tex 22GN 35+5 Gooseneck Trailer
    I was able to find the correct electric brakes, as well as oil seal (which is what I assume you were referring to by wheel seal), and also the bearings for your Big Tex 22GN 35+5 gooseneck trailer. I'll go ahead and list out the parts for you below. - Oil Seal # 10-56 - Replacement Trailer Hub Bearing # 395S & Race # 394A - Replacement Trailer Hub Bearing # 387A & Race # 382A - Dexter Electric Trailer Brake Assembly - Left Hand # 23-438 & Right Hand # 23-439
    view full answer...

Do you have a question about this Accessories and Part?


Info for this part was:

Employee Joe V
Installed by:
Joe V
Employee Jeff D
Installed by:
Jeff D
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Dustin K
Video Edited:
Dustin K

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