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Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Left Hand - 8K
(19 reviews)
Price: $288.65
In Stock
Dexter
Dexter Electric Trailer Brake Assembly - Self-Adjusting - 12-1/4" - Left Hand - 8K
Part Number: 23-434
In Stock
$288.65
Retail:$294.98
$268.65 after $20.00 Mail-In Rebate 
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- Reviews (19)
- Q & A (0)
- Photos
Dexter Accessories and Parts - 23-434
- Trailer Brakes
- Electric Drum Brakes
- Brake Assembly
- Dexter
- 12-1/4 x 3-3/8 Inch Drum
- Self Adjust
- LH
- 8000 lbs
12-1/4" x 3-3/8" Driver's-side electric trailer brake assembly fits 8,000-lb axles. Mounting flange has a 4-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: left hand (driver's side)
- Dimensions: 12-1/4" diameter x 3-3/8" wide
- Mounting flange bolt pattern: 4 bolt
- Wheel size: 15" or larger
- Compatible with 12-1/4" hub/drums
- Axle rating: 8,000 lbs
- Limited 5-year warranty
K23-434-00 Dexter Electric Brake Assembly, LH 12-1/4" x 3-3/8" - Self Adjust - 8K
Replaces 23-434
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Product did not meet expectations
- Wrong item was ordered
Ratings & Reviews
4.7
19 reviews
by:
Purple
07/21/2025
Product is what was ordered and will fit. There is an issue with using USPS to North Dakota though. Made 2 orders exact same parts and part came UPS 2 days. second order - same product came USPS took 7 days.
Couldn't figure out why.
Couldn't figure out why.
by:
michael mays
09/27/2016
Hey,man i love my brakes. i bought my trailer from crags list and it had no brakes. it was plum dangerous ,i put your brakes on my self and i have hauled my cattle to market and from farm to farm many times, there is nothing like good brakes. thanks so , so much. mike mays.
by:
Chris
04/03/2025
Easy Install- have not tested road travel. Aaron, my sales rep, super informative and helpful - returned calls too when not available!
by:
Lawrence
07/06/2023
excellent shipping
by:
Lee S.
02/27/2017
Excellent product-easy install-still working well after a year
Lee S.
3/3/2018
Absolutely great. Still working well. Great products.
by:
Dylan
08/13/2020
Part showed up fast with no issues!
by:
Tony
02/08/2018
Very reliable and fast. Product was correct and in perfect condition.
by:
Deler
07/11/2021
Quality parts
by:
Jason
05/11/2026
by:
David
10/23/2026
by:
Brooke
08/18/2022
by:
Scott
08/23/2021
by:
Johnson
03/29/2021
by:
Jason
01/14/2026
by:
Scott
11/10/2025
by:
Deana
03/17/2021
by:
Yvonne
07/15/2025
by:
Tammie
03/15/2025
by:
James
05/07/2024
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See what our Experts say about this Dexter Accessories and Parts
- Replacement Grease Seals and Brake Magnets for a Dexter Electric Trailer Brake AssemblyHey Jennifer, for your Dexter Electric Trailer Brake Assembly # 23-434 you can use the Replacement Magnet for Dexter 12-1/4" x 5" Electric Brake Assemblies # BP01-306 and the Grease Seals 10-36 # RG06-070 for replacements.
view full answer... - Replacement Axle Components For Dexter D80 8,000LB Axle Under 2016 Landmark Orlando 5TH WheelThank you for the image of the axle tag for your Dexter D80 8,000LB axle. This will require the 10-36 Grease Seals # RG06-070 you found. Here is a list of the other components your axle uses should you want to replace or find any parts worn. Inner Bearing # 25580 Inner Race # 25520 Outer Bearing # 02475 Outer Race # 02420 Left Hand Brake Assembly # 23-434 Left Hand Brake Shoes # BP04-245 Right Hand Brake Assembly # 23-435 Right Hand Brake Shoes # BP04-255 Brake Spring Kit # K71-506-00 Hub/Drum...
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- Replacement Brake Assemblies for Dexter 8-285 Oil Bath Hub and Drum for 8,000 Pound AxleFor your 8-285 hub and drum similar to the Dexter Hub and Drum, Oil Bath # 8-285-9UC3 for 8K pound axles, the Dexter Electric Brake Assembly, Right Hand # 23-435 and Left Hand # 23-434 are the correct fit brake assemblies for your axle. Another great option for replacement trailer brake assemblies are the Electric Trailer Brake with Dust Shield, Left Hand # AKEBRK-8L and Right Hand # AKEBRK-8R. These brake assemblies have the 12-1/4 inch x 3-3/8 inch size needed for your hub, are designed...
view full answer... - Mounting Flange Bolt Pattern for Dexter 4 Bolt 8k Brake AssembliesFor Dexter 8k rated brake assemblies that have 4 bolt mounting pattern and are 12-1/4 x 3-3/8 inch you would be referring to the part # 23-434 which has 3-5/8 inches between the left and right holes and 3-7/16 inches between the top and bottom holes. I attached a picture that shows this.
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- Availability of Electric Brake Drum Assembly for # 8-285-11 Dexter Trailer Hub and DrumThe Dexter Trailer Hub & Drum Assembly, part # 8-285-11UC3, that you have referenced, is the # 8-285-11 hub and integrated drum with the bearings, races, seal, cap, and lug nuts for a Dexter 8,000-lb axle. The electric brake drum assembly that fits the 8-285 hub and integrated drum would be the Dexter Electric Brake Assembly-Left Hand, part # 23-434, for the left side and Dexter Electric Brake Assembly-Right Hand, part # 23-435. These brake assemblies are for use on 8,000-lb and 9,000-lb...
view full answer... - Are Dexter 8k Brake Assemblies and Al Ko Assemblies InterchangeableThe Al Ko brake setups use a slightly different bolt pattern so they do not fit in place of the Dexter setups like the # 23-435 that you referenced. For the matching other side you'd want the # 23-434.
view full answer... - 12-1/4 x 3-3/8 Inch Electric Trailer Brakes for 9K and 10K Trailer AxlesThere 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 and they are for 8K axles.
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... - Troubleshooting Dexter Nev-R Adjust Assembly on Trailer that Randomly Locks UpIt's got to be something mechanical on the assembly of the problem wheel. I'd go with a new assembly like part # 23-434 and you'll have it taken care of. Unless you pull the hub off and can find an obvious mechanical error. You could test this by swapping the brake assemblies on the left hand side of the trailer and see if a different wheel starts to lock up.
view full answer... - What are the Size of the Mounting Bolts for the Dexter Electric Trailer Brake Assembly # 23-434The mounting holes on the Dexter Electric Trailer Brake Assembly for 8K to 9K Axles, # 23-434, measures 1/2 inch in diameter. These brake assembles will fit on mounting flanges that use 1/2 inch studs or bolts.
view full answer... - Mounting Bolt Pattern for Dexter 8K - 9K Brake Assembly # 23-434Great news, I was able to go out into our warehouse and measure the mounting holes on this brake assembly. The center to center width measurement is 3-5/8 inches. The height measurement is 3-7/16 inches center to center. I have added an image for you to see my exact measurements.
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- Recommended Brake Assemblies and Hubs with Oil Bath For Dexter 8,000 lb AxlesFor your 8,000 lb axle hubs with oil bath, I recommend the Trailer Hub and Drum Assembly - 8,000-lb Axles - 8 on 6-1/2 - Oil Bath, # 8-285-10UC3-A. The brake assemblies I recommend to match the hubs are the Electric Trailer Brake with Dust Shield - Self-Adjusting - 12-1/4" - Left Hand - 8,000 lbs # AKEBRK-8L and # AKEBRK-8R for the right hand side. You may want the Brake Adjustment Spoon for Drum Brakes # W80630 for the initial adjustment, but these brakes with self-adjust after that. If...
view full answer... - Are 8k Dexter Trailer Hubs a Fit for Both Sides of the TrailerTrailer hubs are not directional like brake assemblies are. The number you mentioned is very similar to the # 8-285-11 which is a fit for both the right and left side of the trailer. The electric brake drum assembly that fits the 8-285 hub and integrated drum would be the Dexter Electric Brake Assembly-Left Hand, part # 23-434, for the left side and Dexter Electric Brake Assembly-Right Hand, part # 23-435.
view full answer... - Dimension of Center Hole/Axle Bore on a 8,000lbs Dexter Brake AssemblyGood news! I can help get you the measurement you were looking for. The center hole size on the # 23-434 brake assembly, which is also referred to as the axle bore diameter is 3-7/8 inches. The center hole on the hub # 8-218-9 you were looking at is 4-9/16 for the older style and 4-3/4 inches for the newer style.
view full answer... - Replacement Electric Drum Brakes and Hub/Drum Assembly for Dexter Axle I was able to contact Dexter Axle and get the information on your axle. The p12 that you referred to has to do with the location of the plant that manufactured your axle. The direct replacement for your drum brakes would be the Right Hand Assembly # 23-435 and the Left Hand Assembly # 23-434. These are the self-adjusting brakes with the 4 bolt pattern to match with your brake mounting flange. The Hub & Drum Assembly - 8 on 6-1/2 - Oil Bath # 8-285-9UC3 comes with the correct hub, drum,...
view full answer... - Trailer Brake Assemblies For a Dexter Axle With 023-435-00 On Brake TagThank you for the image with the tag Eric. This is the Right Hand Brake Assembly # 23-435. We do have the Kit # 23-434-435 which will include both the Left # 23-434 and Right # 23-435 assemblies.
view full answer... - Replacement Hub/Drum and Brake Assemblies for Hub Part Number 8-285Hey Stephen, if you are looking for a replacement hub/drum the correct part number would be the # 8-285-11UC3 and then for brake assemblies you'd need the part # 23-434 and # 23-435. Is that all you are looking for or do you need other components? The hub/drum does come with the needed bearings as well.
view full answer... - Replacement Brake Assemblies for Dexter 8-10k AxlesWe do not have any trailer brake magnets that are rated for that high of an axle. We do have the Dexter brake assemblies part # 23-450-451 which are a replacement set of assemblies for 9k or 10k axles by Dexter. For an 8k assembly we have the part # 23-435 for the right hand side and part # 23-434 for the left hand side.
view full answer... - Recommended Brake Flange, Brakes, And Hub And Drum For 8,000-lb AxleTypically, a 3-1/2 inch diameter axle like you said you have on your trailer is an 8,000-lb axle. The brake mounting flange on the axle that is designed for a 3-1/2 inch axle is part # 4-50. The flange mounting holes measure 3-3/8 inches between the left and right holes and 3-5/8 inches between the top and bottom holes. The hub and drum we offer that is designed for 8,000-lb axles is part # 8-285-11UC3. This includes the drum, bearings, races, seal, cap, and lug nuts. For electric...
view full answer... - Will The Brake Assemblies For A 7 Bolt Flange Work With The 4 Bolt Flange?For a 9,000 lb axle with 4 bolts, you will want the Dexter Electric Brake Assembly, RH 12-1/4" x 3-3/8", # 23-435 and the matching left side assembly # 23-434. These are the only assemblies for the 4 bolt mounting plate and the 7 bolt plates are not compatible. Unfortunately, the Electric Trailer Brake with Dust Shield - Self-Adjusting - 12-1/4" - Left Hand - 10,000 lbs, # AKEBRK-10L, is an example of the 7 bolt flange that is not compatible with your axle.
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Info for this part was:
Installed by:
Jeff D
Expert Research:
Jameson C
Updated by:
Wilson B
Updated by:
Alexander C
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Victoria H.
4/4/2025
I'm glad install went smoothly for you Chris! I'll let Aaron know you gave him a shout out! Feel free to keep us in the loop once you get to put these to the test.