1. Trailer Brakes
  2. Dexter Axle
  3. Hydraulic Drum Brakes
  4. 7000 lbs Axle
  5. 12 x 2 Inch Drum
  6. 14-1/2 Inch Wheel
  7. 15 Inch Wheel
  8. 16 Inch Wheel
Dexter Hydraulic Trailer Brake Kit - Free Backing - 12" - Left and Right Hand Assemblies - 7K

Dexter Hydraulic Trailer Brake Kit - Free Backing - 12" - Left and Right Hand Assemblies - 7K

Item # 23-342-343
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Our Price: $243.46
Trailer Brakes
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23-342-343 - Brake Set Dexter Axle Hydraulic Drum Brakes
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Free-backing, driver's-side and passenger's-side hydraulic trailer brake assemblies won't engage when you reverse, even if your hydraulic actuator is activated. Mounting flanges have a 5-bolt pattern. Fit 14.5" to 16" wheels. Lowest Prices for the best trailer brakes from Dexter Axle. Dexter Hydraulic Trailer Brake Kit - Free Backing - 12" - Left and Right Hand Assemblies - 7K part number 23-342-343 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (5)
  • Q & A (12)
  • Videos (1)
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Dexter Axle Trailer Brakes - 23-342-343

  • Hydraulic Drum Brakes
  • 7000 lbs Axle
  • 12 x 2 Inch Drum
  • 14-1/2 Inch Wheel
  • 15 Inch Wheel
  • 16 Inch Wheel
  • Dexter Axle
  • Free Backing
  • Brake Set

Free-backing, driver's-side and passenger's-side hydraulic trailer brake assemblies won't engage when you reverse, even if your hydraulic actuator is activated. Mounting flanges have a 5-bolt pattern. Fit 14.5" to 16" wheels.


  • Hydraulic drum brake assemblies are designed for use with a surge-type trailer brake actuator
  • Free-backing design lets you reverse without trailer brakes being activated
    • Hydraulic pressure is contained by wheel cylinder
    • Brake shoe turns and releases pressure when reversing
  • Adjuster plugs (included) cover access holes to keep dirt and grime out of the assemblies and off of the shoes
  • Left-hand (driver's-side) brake assembly, right-hand (passenger's-side) brake assembly, and nuts included
    • Mounting bolts sold separately
  • Made in the USA


  • Dimensions: 12" diameter x 2" wide
  • Wheel size: 14-1/2", 15" or 16"
  • Mounting flange bolt pattern: 5 bolt
  • Axle rating: up to 7,000 lbs

23-342 12" x 2" Hydraulic Brake Assembly - LH - Free Backing - 7K lbs

23-343 12" x 2" Hydraulic Brake Assembly - RH - Free Backing - 7K lbs

Video of Dexter Hydraulic Trailer Brake Kit - Free Backing - 12" - Left and Right Hand Assemblies - 7K

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 - 23-342-343 Review

Today we're going to take a look at the Dexter 12-inch Free Backing Hydraulic Trailer Brake Kit with the right and left hand brake assemblies for 7,000 pound axles. Now, hydraulic drum brake assemblies are designed for use with surge-type trailer brake actuators. These brakes happen to be a free backing design, and that'll let you back up without engaging the trailer brake even if your actuator is activated. Basically the hydraulic pressure is contained by the wheel cylinder, and it has the fall-away shoe right here that will diminish shoe drive when you're backing up. You can always tell the free backing design because of the fall-away shoe would have sort of a D-design to it. It looks like a D-shaped shoe. Now, these are also manual adjustment brakes, so you do need to periodically manual adjustment on these.

Right down here is your adjustment gear. You just turn that for adjusting it, and you access that adjustment gear through the hole in the backing plate. They have an access hole right back here. What's nice on this one, usually that access hole is open, so when you're not using it, you could get dirt in there, so what they've done is they've put these plugs in here that'll cover that hole. It helps keep that dirt and grime out of your assembly and off your brake shoes.

Now this part number includes both the left hand driver's side brake assembly and the right hand passenger side brake assembly. You can see the mounting nuts with the lock washers are all included. Now, on 12-inch size brake assemblies like these, the bolts are already attached to the brake mounting flange, so all you have to do is slide your brake assembly onto those bolts, use your nut that has the integrated lock washer on it, and tighten it down. A few dimensions on this, the size is 12-inch diameter by two inches wide, and where they measure that is the diameter would be measured from your brake shoe here all the way straight across to the brake shoe over here. You can see if we put a ruler on, there's your 12-inch diameter and the two-inch wide would be the width of the pad on the brake shoe. We'll put a ruler on that. There's your two inches wide, and you can see here's your five bolt holes for the mounting flange bolt pattern.

Now, these do require the use of 12-inch brake drums. The wheel size that you're going to use on these brake assemblies is 14 1/2 inches, 15 inches and 16 inches, and again, the axles they're designed for is up to 7,000 pound axles. Now, the last thing I do want to show you is how to tell the difference between the left hand driver's side and the right hand passenger side. Now, on a new assembly like these, you can see there's a tag on them that'll tell you that, but if the sticker wasn't there the best way is to look at the length of the pad on the brake shoe. On this one you see the pad goes from here to here, and this one goes from here to here. This is a lot shorter shoe, or a pad.

The shorter pad is your primary shoe. That'll always face the front of the trailer, so this will tell you that this goes on the right hand passenger side, and if you go to the other one, again, the shoe goes from all the way here to here. This one just goes from here to here, so the shorter shoe, the primary shoe, faces the front. That'll tell you that this is the left hand driver's side assembly. That should do it for the review on the Dexter 12-inch Free Backing Hydraulic Trailer Brake Kit with the left and right hand brake assemblies for 7,000 pound axles.

Customer Reviews

Dexter Hydraulic Trailer Brake Kit - Free Backing - 12" - Left and Right Hand Assemblies - 7K - 23-342-343

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

Free-backing, driver's-side and passenger's-side hydraulic trailer brake assemblies won't engage when you reverse, even if your hydraulic actuator is activated. Mounting flanges have a 5-bolt pattern. Fit 14.5" to 16" wheels.

- 23-342-343

Easy website to use, parts packed well and even arrived early! 747577

- 23-342-343

Parts were In stock. Perfect fit and function. Fast shipping. 722017

- 23-342-343

Very fast service, products as described 630891

- 23-342-343

Dexter is the way to go. These were for a boat trailer I only use in fresh water.Tried less expensive knock offs, but they only lasted a year. I have been very happy with any Dexter Product. They are much better than others. 523935

- 23-342-343

Great price and fast shipping. Well built, and built here in the USA 408315


Ask the Experts about this Dexter Axle Trailer Brakes

  • Recommended Parts To Convert Trailer From Hydraulic Surge Brakes To Electric Over Hydraulic Brakes
    We do not have a specific kit but I can help you find all of the parts you need to convert your trailer from hydraulic surge brakes to electric over hydraulic brakes. With this conversion, you can choose from hydraulic drum or disc brakes. Generally, disc brakes provide stronger braking action than drum brakes which reduces required stopping distances and increases overall safety. Disc brakes also require less maintenance than drum brakes because they have fewer moving parts. Ultimately,...
    view full answer...
  • Replacing Brake Assemblies of Loadmaster Boat Trailer Carrying 26 Foot Long Boat
    Based on what you described your trailer has 12 inch by 2 inch brake assemblies installed on it which is a very standard and common size. For a set of electric brakes that are self adjusting and will work really well as a replacement I'd recommend the etrailer 5.2k to 7k brake assembly set part # AKEBRK-7-SA. These will replace what you have easily and will give you new brakes that will work much better than your worn out set currently. I attached an install video for these for you...
    view full answer...
  • Brake Assembly Recommendation for Loadmaster Boat Trailer
    From the info and picture you gave me I can tell you that the Dexter Hydraulic Trailer Brake Kit # 23-342-343 you referenced is exactly what you'll need. It fits the bolt pattern I see in the picture and has the 12 inch diameter you need as well. This is a pair for both sides of the trailer as well. To pick out a replacement grease seal you will need to measure the diameter of the spindle where the grease seal rides with a digital or dial caliper and then need to measure the hub bore...
    view full answer...
  • Replacement 12x2 Free Backing Surge Brakes with Part 023-342-00
    Thank you for the photo! Since your current drum brake assembly is part 023-342-00 from Dexter Axle the replacement brake kit for both sides of your axles is part # 23-342-343. You will need one kit for each axle on your trailer. These are free backing 12" x 2" brake assemblies from Dexter Axle. Attached is a review video for you to check out as well.
    view full answer...
  • Free-Backing Drum Brakes for M101A2 Military Dump Trailer
    To check the fit and compatibility for a set of replacement hydraulic drum brakes on your M101A military dump trailer you will want to match up a few things. Those things are drum dimensions, axle weight capacity, mounting bolt pattern and the compatible wheel sizes. The linked photo shows how to check your drum size. The Dexter free-backing 12 x 2-inch brake kit you mentioned # 23-342-343 is suitable for axles rated up to 7K, they use a 5-bolt mounting pattern and they fit wheel diameters...
    view full answer...
  • Can OEM Brake Controller on 2011 Ford F-350 be Used with Electric Over Hydraulic Actuator
    The OEM controller in your 2011 Ford F-350 is actually very similar to the Tekonsha Prodigy brake controllers so you wouldn't need to add an aftermarket controller unless you absolutely wanted to. There should be a setting for electric over hydraulic (EOH) brakes that you choose for this. If you do decide to use an aftermarket then I highly recommend the Prodigy P2 # 90885 because you will already be somewhat familiar with how to use it. All you need to complete the installation is the...
    view full answer...
  • How Can I Identify an Axle Without a Sticker?
    Thank you for the pictures! It looks like you've got some sort of square drop axle on your trailer and if you can't find an identifying sticker, I can still help you figure out what you've got so that you can make the swap to electric brakes on your trailer. It looks like you've got 6 bolts on the wheels, which can help narrow down our search, but we'll need to know what size the brakes on the trailer are and if possible, what size (or number) the inner and outer bearings are on the...
    view full answer...
  • How Do I Back Up with a Surge Brake Actuating Coupler With No Reverse Lockout?
    The Titan Adjustable-Channel Brake Actuator - Painted - Disc - 2-5/16" Ball - Weld On - 14,000 lbs # T4750000 will allow you to either use the Replacement Solenoid Valve for Titan Brake Actuators with Reverse Lockouts # T4748800 or you can use free-backing brake assemblies like # 23-342-343.
    view full answer...
  • Recommended Parts Compatible with Dexter P12 7,000 lb Axle
    We do not carry the replacement axle for your P12 7K Axle. We do however have the brake assemblies and bearing kit or hub/drum assemblies to assist based on what I can find online for a 7K Dexter axle. You will most likely want the Bearing Kit, 14125A/ 25580 Bearings, 10-36 Seal # BK3-200 to work with your axle and hub/drum assembly. To get the entire replacement assembly, you want the Dexter Trailer Hub and Drum Assembly - 5,200-lb to 7,000-lb E-Z Lube Axles - 12" - 8 on 6-1/2 # 42866UC3-EZ....
    view full answer...
  • Replacement Hydraulic Brake Assemblies With Parking Brake Integrated
    I was able to cross reference with the manufacturer and find the parts you need. I recommend the Dexter Hydraulic Trailer Brake Kit - Free Backing - 12" - Left and Right Hand Assemblies - 7K # 23-342-343 if you don't need the parking brake. If you want the parking brake, then I recommend the Dexter Free-Backing Hydraulic Trailer Brake Assembly w/ Parking Brake Lever - 12" - Right Hand # T2351200 and Left Hand # T2351300.
    view full answer...
  • Replacement 12 Inch Brake Assemblies Compatible with Old Warner Trailer Hub/Drums
    You can absolutely use the Dexter 12 inch brake assemblies. If you have electric brakes then the Dexter Nev-R-Adjust Electric Trailer Brake Kit - 12" - Left and Right Hand Assemblies # 23-458-459 with your current hubs. You may also want the new mounting hardware # BRKH12. For a more economic option that will work just as well, you may want to consider the Electric Trailer Brake Kit - Self-Adjusting - 12" - Left and Right Hand Assemblies # AKEBRK-7-SA. If you have hydraulic brakes,...
    view full answer...
  • Hydraulic Trailer Brake Assemblies Compatible with the Dexter 8-174-5UC3 Hub Drum Assemblies
    The Dexter Trailer Hub and Drum Assembly - 6,000-lb and 7,000-lb Axles - 12" - 5 Spoke Utility # 8-174-5UC3 is compatible with either the Dexter Hydraulic Drum Brake Kit - Duo Servo - 12" - Left and Right Hand Assemblies - 7,000 lbs # 23-336-337 or the free backing Uno Servo # 23-342-343. The Duo Servo option will give you the best braking capacity with those hubs so that is my recommendation.
    view full answer...

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Info for this part was:

Edited by:
Lindsey S
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Written by:
Alexander C

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