1. Trailer Brakes
  2. Dexter Axle
  3. Hydraulic Drum Brakes
  4. 12000 lbs Axle
  5. 12-1/4 x 5 Inch Drum
  6. 16 Inch Wheel
  7. 16-1/2 Inch Wheel
  8. 17 Inch Wheel
  9. 17-1/2 Inch Wheel
Dexter Hydraulic Drum Brake Kit - Duo Servo - 12-1/4" - Left and Right Hand Assemblies - 12K

Dexter Hydraulic Drum Brake Kit - Duo Servo - 12-1/4" - Left and Right Hand Assemblies - 12K

Item # 23-408-409
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Trailer Brakes
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Shipping Weight: 43 lbs
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23-408-409 - 16 Inch Wheel,16-1/2 Inch Wheel,17 Inch Wheel,17-1/2 Inch Wheel Dexter Axle Hydraulic Drum Brakes
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12-1/4" x 5" Driver's-side and passenger's-side hydraulic trailer brakes have a dual-plunger design. Mounting flanges have a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fit 16" or larger wheels. Lowest Prices for the best trailer brakes from Dexter Axle. Dexter Hydraulic Drum Brake Kit - Duo Servo - 12-1/4" - Left and Right Hand Assemblies - 12K part number 23-408-409 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Dexter Axle Trailer Brakes - 23-408-409

  • Hydraulic Drum Brakes
  • 12000 lbs Axle
  • 12-1/4 x 5 Inch Drum
  • 16 Inch Wheel
  • 16-1/2 Inch Wheel
  • 17 Inch Wheel
  • 17-1/2 Inch Wheel
  • Dual Servo
  • Brake Set
  • Dexter Axle

12-1/4" x 5" Driver's-side and passenger's-side hydraulic trailer brakes have a dual-plunger design. Mounting flanges have a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fit 16" or larger wheels.


Features:

  • Hydraulic drum brake assemblies are 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
  • Left-hand (driver's-side) brake assembly and right-hand (passenger's-side) brake assembly included
    • Mounting bolts and hardware sold separately
  • Made in the USA


Specs:

  • Dimensions: 12-1/4" diameter x 5" wide
  • Mounting flange bolt pattern: 7 bolt
  • Wheel size: 16" or larger
  • Axle rating: 12,000 lbs


23-408 Dexter 12-1/4" Duo-Servo Hydraulic Brake Assembly - LH - Self Adjust - 12K

23-409 Dexter 12-1/4" Duo-Servo Hydraulic Brake Assembly - RH - Self Adjust - 12K





Video of Dexter Hydraulic Drum Brake Kit - Duo Servo - 12-1/4" - Left and Right Hand Assemblies - 12K

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




Video Transcript for Dexter Axle Trailer Brakes - Hydraulic Drum Brakes - 23-408-409 Review

Today we're gonna take a look at the Dexter 12-and-a-quarter inch self-adjusting hydraulic drum break kit. Includes the left and right hand side drum break assemblies for 12000 pound axles. Now, hydraulic drum break assemblies are designed for use with serge type trailer break actuators. These break assemblies here are a dual server, which is the dual plunger design. These'll deliver the same amount of breaking when driving either forward or in reverse. These are also self-adjusting breaks.

You can tell that by, as you see, the cable goes around the pulley attached to the lever here that'll automatically adjust the breaks. Self-adjusting breaks will automatically adjust to deliver optimum performance in breaking power. There's no need for manual break adjustments and, of course, proper adjustment will lead to better break efficiency and less wear on your tow vehicle breaks. Now this kid includes both the left hand driver's side, right hand passenger side break assemblies and mounting bolts and hardware is sold separately. Specs on this, the dimension is 12-and-a-quarter inch diameter by five inches wide and that measurement, the diameter is from this shoe to that shoe so it would be 12-and-a-quarter if we put the ruler on it. There's your 12-and-a-quarter inch diameter.

The five inch wide is the width of the pad on the break shoe so, if we turn this and we measure the width of the break pad here, there's your five inch wide. Now this does use a break mounting flange bolt patern of seven bolts and, if you look here, you can see the seven bolt holes that attach to your axle. Now this does require the use of 12-and-a-quarter inch break drums, does require wheel size 15 inches and larger and it is designed for an axle rate at up to 12000 pounds. Now these are left hand and right hand design and the way to tell that, now on a brand new assembly, of course, you'd have a sticker that'll tell you that, but if these didn't have a sticker on it, the best way to tell is just look at the length of the pad on the break shoe so on this one if you see the pad goes from here to here. On this shoe it goes fro here to here so this is a shorter pad. The shorter pad is the primary shoe. That always faces the front of the trailer so that's gonna tell you that this is the right hand passenger side assembly and on this one, again, if you look at the length, this pad goes from here to here.

This one's all the way from here to here. This is longer. This is the shorter pad which is the primary shoe. That'll go this way which'll tell you that this is the left hand driver's side assembly but that should do it for the review on the Dexter 12-and-a-quarter inch self-adjusting hydraulic drum break kit with the left hand and right hand drum break assemblies for 12000 pound axles.


Customer Reviews

Dexter Hydraulic Drum Brake Kit - Duo Servo - 12-1/4" - Left and Right Hand Assemblies - 12K - 23-408-409

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

12-1/4" x 5" Driver's-side and passenger's-side hydraulic trailer brakes have a dual-plunger design. Mounting flanges have a 7-bolt pattern. Self-adjusting brakes require little maintenance. Fit 16" or larger wheels.

- 23-408-409
by:


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Ask the Experts about this Dexter Axle Trailer Brakes

  • Can I Use Dexter Components on Lippert Axles and Vice Versa?
    You're not going to have any problems mixing Dexter and Lippert components on trailer axles over 10k-lbs in the same manner as below 10k-lbs as long as the measurements on the replacement parts are the same- i.e. bearing sizes are the same, etc.. This happens quite often in our shop repairs where we'll use Dexter Brakes like the # 23-408-409 on a Lippert Axle. When doing this, as mentioned above, you will want to make sure that you're using the correct capacity components with parts...
    view full answer...
  • Converting Electric-Over-Hydraulic Brakes to Electric Brakes on Trailer
    If your trailer is currently equipped with electric-over-hydraulic drum brakes then a good portion of the conversion process to change it to an electric only brake setup will simply be removing existing components that are no longer needed. You will need to replace the hydraulic brake assemblies with electric units such as the etrailer.com # AKEBRK-12 if your Dexter 12K axle currently has 12-1/4 inch x 5 inch drums and re-wire the trailer accordingly. I have attached a great article...
    view full answer...
  • Process to Convert Trailer from Air-Over-Hydraulic Brakes to Electric-Over-Hydraulic Brakes
    If the brakes assemblies and hubs/drums on the subject trailers are actually 16-inches in diameter we have no compatible brakes. The largest electric and hydraulic drum brakes we have are 12-1/4 x 5, such as the left/right electric brake set # AKEBRK-12 which is rated for a 12K axle and the left/right hydraulic set # 23-408-409 also rated for 12K axles. We do have electric-over-hydraulic (EOH) actuators like the HydraStar Drum Brake Actuator # HBA-10 and the others shown on the linked...
    view full answer...
    Image 1 for
  • 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...
  • Parts Needed to Convert Trailer from Electric Drum to Electric-Over-Hydraulic Drum Brakes
    To convert your gooseneck trailer from electric drum brakes to EOH (electric over hydraulic) brakes you'll need a few items, all of which are detailed in the linked article on adding an EOH braking system to a trailer. These include the hydraulic brake assemblies, the hub/drums you have, an EOH actuator like the HydraStar # HBA-12, a brake line kit, emergency breakaway kit and a compatible trailer brake controller that will work with an EOH actuator. Not all trailer brake controllers...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Alexander C
Written by:
Alexander C

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