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  6. 12-1/4 x 5 Inch Drum
Dexter Hydraulic Drum Brake Assembly - Duo Servo - 12-1/4" - Left Hand - 15K

Dexter Hydraulic Drum Brake Assembly - Duo Servo - 12-1/4" - Left Hand - 15K

Item # 23-406
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Dexter Axle Trailer Brakes - 23-406
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12-1/4" x 5" Driver's-side hydraulic trailer brake assembly features a dual-plunger design. Mounting flange has a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fits 15" or larger wheels. 1-833-496-1390 to order Dexter Axle accessories and parts part number 23-406 or order online at etrailer.com. Free expert support on all Dexter Axle products. Guaranteed Lowest Price and Fastest Shipping for Dexter Hydraulic Drum Brake Assembly - Duo Servo - 12-1/4" - Left Hand - 15K. Accessories and Parts reviews from real customers.
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Dexter Axle Accessories and Parts - 23-406

  • Trailer Brakes
  • Hydraulic Drum Brakes
  • Brake Assembly
  • 12-1/4 x 5 Inch Drum
  • Dexter Axle
  • LH
  • Dual Servo
  • Self Adjust
  • 15000 lbs

12-1/4" x 5" Driver's-side hydraulic trailer brake assembly features a dual-plunger design. Mounting flange has a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fits 15" or larger wheels.


Features:

  • Hydraulic drum brake assembly is designed for use with a surge-type trailer brake actuator
  • Dual-plunger design delivers same amount of braking when driving either forward or in reverse
  • 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: left hand (driver's side)
  • Dimensions: 12-1/4" diameter x 5" wide
  • Mounting flange bolt pattern: 7 bolt
  • Wheel size: 15" or larger
  • Axle rating: 15,000 lbs
  • Limited 5-year warranty


K23-406-00 Dexter 12-1/4" Duo-Servo Hydraulic Brake Assembly - LH - Self Adjust - 15K

Replaces 180250 and 23-406





Video of Dexter Hydraulic Drum Brake Assembly - Duo Servo - 12-1/4" - Left Hand - 15K

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




Video Transcript for Dexter Axle Trailer Brakes 23-406 Review

Today, we're going to take a look at the Dexter 12-1/4" Duo Servo Left-hand Heavy-Duty Hydraulic Drum Brake Assembly for 15,000 lb axles. This hydraulic drum brake assembly is designed for use with surge-type trailer brake actuators. This is a duo-plunger, duo-servo design, delivers the same amount of braking with driving either forward or in reverse. This also has a forward, self-adjust feature. The way you can tell that is if you look where the cable goes around the pulley and attaches to the lever, which adjusts the adjustment gear. This forward, self-adjust feature will self-adjust your brake when you are applying the brakes going forward, so it does not require periodic manual adjustment like standard brakes. Configuration on this is a left-hand, driver's-side assembly, and the easiest way to tell that .. Now on a new one, you'll have a sticker that'll designate it, but if the sticker isn't there, if you just look at the length of the brake pad, this one goes from here to here, and this one goes all the way from here to here, so this is a longer brake pad.

This one's the shorter brake pad. The shorter brake pad is the primary shoe. That will always fact the front of the trailer, so that will tell you that that is a left-hand, driver's-side assembly. Now the size on this is a 12-1/4" by 5", and where they measure that, the 12-1/4 will be the diameter from edge-to-edge here. If we put a ruler on it, there's your 12-1/4". The 5" will be the width of the brake pad itself, from here to here.

There's your 5", so 12-1/4 by 5". Now this does use a seven-bolt mounting flange. You can see the seven holes right there that attach to your brake-mounting flange on your axle. Now the mounting bolts to attach it, we do see those separately on our website. This assembly is DOT designed for a 15,000 lb axle. That should do it for the review on the Dexter 12-1/4" Duo Servo Left-hand Heavy-Duty Hydraulic Drum Brake Assembly for a 15,000 lb axle..


Customer Reviews

Dexter Hydraulic Drum Brake Assembly - Duo Servo - 12-1/4" - Left Hand - 15K - 23-406

Average Customer Rating:  5.0 out of 5 stars   (1 Customer Reviews)

12-1/4" x 5" Driver's-side hydraulic trailer brake assembly features a dual-plunger design. Mounting flange has a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fits 15" or larger wheels.

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See what our Experts say about this Dexter Axle Accessories and Parts



  • Debating With Switching To Electric Over Hydraulic Disc Brakes Or Hydraulic Drum
    I recommend you go with electric over hydraulic disc brakes because of their stopping power. They also have fewer moving parts which means less maintenance. You basically get the best of both worlds with an EOH system with disc brake assemblies because you have the advantage of the stopping power of hydraulic brakes but the reaction time of electric brakes because you can use a brake controller. I have linked an article that explains the parts you need to add disc brakes to your trailer....
    view full answer...
  • How Much Torque is Required for the Dexter Hydraulic Drum Brake Hit # 23-406-407 Mounting Bolts?
    I confirmed with Dexter Axel that the mounting bolts on the Dexter Hydraulic Drum Brake Kit # 23-406-407 require 90 foot/lbs. of torque when tightening.
    view full answer...
  • Can Dexter 15K Hydraulic Drum Brake Assembly Be Used on 12K Axle
    Yes, you can use the Dexter 15K Hydraulic Drum Brake Assembly # 23-407 in place of the 12K # 23-409 on your trailer axle. Both share the same 12-1/4" x 5" dimensions and 7 bolt pattern so physically there isn't any difference in terms of fit with your existing drums. The main difference between the two assemblies is the size of the wheel cylinder that's used. When using the 15K assemblies on a 12K axle you may just notice a slight increase in the braking aggression, although the self-adjustments...
    view full answer...
  • Converting From Dexter 12K Disc Brakes to Dexter 12K Drum Brakes
    The correct Dexter Hydraulic Drum Brake Kit for your Dexter 12K Axle is part # 23-408-409. The Dexter Hydraulic Drum Brake Kit part # 23-406-407 that you referenced is for Dexter 15K Axles and will not work for you. The Dexter Hydraulic Drum Brake Kit uses the same brake mounting flange as your disc brake setup so it will be a direct swap. However, you will still need to obtain the hub and drum. Unfortunately, we do not carry these but the correct part number for the hub is part 8-214-8UC1...
    view full answer...
  • Replacement Brakes For Gooseneck Trailer With Heavy Axles
    The largest set of brakes we will have is for a 15K axle. We have two options, the Dexter Electric Brake Kit, # 23-446-447 for 15K axles with 12-1/4 x 5 Inch Drums.
    view full answer...
  • Is the Replacement Brake Adjuster Kit for Dexter Self-Adjusting Brakes for Hydraulic Brakes
    The Replacement Brake Adjuster Kit for Dexter 12-1/4" Forward Self-Adjusting Brakes # K71-472-00 is definitely designed for hydraulic brakes. It can be easy to assume that hydraulic brakes mean disc brakes, in which case they would be correct. This part, however, is for hydraulic drum brakes. Although this is slightly different, the brake adjuster for hydraulic drum brakes is located on the assembly at the bottom just like an electric brake assembly. This can be seen on the Dexter Hydraulic...
    view full answer...
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  • Parts Needed to Convert Trailer With Tandem 15k Axles to Electric Over Hydraulic From Electric
    We can get you set up with an electric over hydraulic system for your trailer with 15,000 lb tandem axles. I will say that you will not want to go with the higher pressure 1,6000 psi actuator, which is too high for drum brakes and can potentially blow out the wheel cylinder. What you can do though is go with a 1,200 psi actuator made for drum brakes, which will still give you excellent stopping power. Here is exactly what you will need for your set up: - HydraStar Electric Over Hydraulic...
    view full answer...
  • Converting From Electic Drum Brakes To Hydraulic Disc Brakes
    To convert electric drum brakes to electric-over-hydraulic disc brakes you will need disc brake assemblies, a brake line kit and an electric over hydraulic actuator. For disc brake assemblies, the Kodiak Disc Brake Kit # K2R1058D13 kit is what I recommend. To determine the correct brake line kit you will want to measure the distance from your actuator to the front axle. The kits are measured in the distance from the actuator to the front axle. For a 20-ft, 24-ft, or 25ft brake line kit...
    view full answer...

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C

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