Demco Hydraulic Drum Brake - Single Servo - Galvanized - 10" - RH - Self-Adjusting - 3,500 lbs

Part Number: DMSB24428M

In Stock

$97.48

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demco accessories and parts trailer brakes 10 x 2-1/4 inch drum hydraulic brake - single servo galvanized rh self-adjusting 3 500 lbs

demco accessories and parts hydraulic drum brakes brake assembly

demco accessories and parts brake assembly 10 x 2-1/4 inch drum dmsb24428m

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demco accessories and parts trailer brakes hydraulic drum brake - single servo galvanized 10 inch rh self-adjusting 3 500 lbs

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Typically used on the Demco Kar Kaddy tow dolly, this self-adjusting hydraulic brake assembly features a single-plunger design. Galvanized steel resists rust. Mounting flange bolt pattern is 4 on 3.96". 1-800-940-8924 to order Demco accessories and parts part number DMSB24428M or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Hydraulic Drum Brake - Single Servo - Galvanized - 10" - RH - Self-Adjusting - 3,500 lbs. Accessories and Parts reviews from real customers.

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Demco Accessories and Parts - DMSB24428M

Features:

Marine-grade hydraulic drum brake assembly is typically used on Demco Kar Kaddy tow dolly
- Designed for use with surge-type trailer brake actuators
Sturdy, corrosion-resistant steel construction
- Galvanized backing plate
- Stainless steel spring hardware
- Zinc-plated wheel cylinder
Self-adjusting brake does not require periodic manual adjustment like standard brakes
- Will not overadjust
Single-plunger design delivers 15 - 20 percent braking in reverse
Riveted brake shoes provide increased durability
Mounting bolts sold separately
Made in the USA

Specs:

Application: Demco Kar Kaddy tow dolly
Configuration: right hand (passenger's side)
Dimensions: 10" diameter x 2-1/4" thick
Mounting flange bolt pattern: 4 on 3.96"
Wheel size: 13" - 15"
Axle rating: up to 3,500 lbs
1-Year warranty

SB24428M Demco Car Caddy Self-Adjusting Galvanized 10" Marine Trailer Brake Assembly - Single Servo - Right Hand

Customer Satisfaction Score:

96% were satisfied with this product

4% of customers were not satisfied

etrailer mistake

4% of customers were not satisfied

etrailer mistake

4.9

67 reviews

5 Stars		(60)
4 Stars		(6)
3 Stars		(0)
2 Stars		(1)
1 Star		(0)

by: Hot Springs, Arkansas 05/17/2025

etrailer.com did some magic, and made sure our delivery was on time, even when we had been notified by UPS that the order would be late, like 2 more days. Will definitely order from them again the next time we need parts. Installed the drum brake and everything is working fine.
Thank you, etrailer.com,
Sincerely

Greg R. One Year Later

5/18/2026

Works as designed

Lazer S.

5/19/2026

@GregR Glad to hear they are still working well! Being able to stop is definitely one of the more important things to be able to do! ^___^ What did you install these on?

by: John J 03/06/2017

After inspecting the brakes on my Demco Kar Kaddy, The brake shoes had some deep cracks in the shoe lining. I started researching the best option for replacement and ETrailer had exactly what I needed. The parts showed up within a week without incident. I could of just replaced the shoes but since I purchased this trailer used I wanted to make sure everything was top notch. I purchased the complete brake set, which comes with new wheel cylinders, shoes springs and all hardware. The job went smooth, remove the wheel and tire, remove the brake drum, I took the brake drums into a local shop and had them turned, remove the brake line, remove the four bolts that hold the hub and backing plate to the axle.The bolts had loctite on them so I took a tap and cleaned up the threads. I installed the new backing plate, put some new blue thread lock to the bolts and tightened to specifications. I adjusted the brakes to the freshly turned drums, bled the brakes reinstalled the tires and wheels and I was back in business.

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by: Dave L. 05/15/2015

I bought an old boat trailer "70 vintage" that had surge brakes. unfortunaly the wheel cylinders were bad and needed replaced. after several atemps I could not locate the proper cylinders or rebuild kits. I came across Etrailer's brake back plate kits and was amazed at the low price so I desided to try them. They bolted right up and fit purfectly on a 40+ year old axel and are working as they should. I upgraded the trailer to the self adjusting brake kit and is very pleased with the outcome.

by: Dans 03/03/2017

Demco surge brake actuator
Demco brake cluster (2)

Product shipped and was received within a couple of days. Finally warmed up enough to tackle this project. My tow-dolly is a 1998 so the job was a little different than the video shows. Had to wrench the bolts all the way out with a cheater ( think Loc-Tite ). Also needed a little help with a hammer to separate hub/spindle from backing plate. Went back together pretty well. New actuator went right into place.
Great service.

by: Seth 06/12/2024

Easy to install and working as expected.

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by: Christopher 09/08/2022

I had initially ordered the dual servo drum brakes and realized my mistake shortly before they arrived. I called customer service and Alex was extremely helpful and accommodating with helping me choose the correct brakes and exchanging the original ones. I have ordered from etrailer.com before and have never been disappointed.

by: Daniel 09/20/2023

Ordered wrong set, contacted etrailer and had correct set sent. No issues, other than a 7 to 10 day delay for a credit reimbursement. Make sure you verify the mounting plate bolt pattern and distances between bolts.

by: Dave F. 10/22/2015

Products arrived in 2 days, fit perfectly and the price couldn't be beat. Etrailer will always be my first choice parts place. Thanks etrailer.

by: Wayne 04/20/2020

All products are great and low prices. Customer service is top notch. Shipping is fast

by: JA 12/02/2014

Received this products in record time, a week earlier than expected. In fact, haven't even opened the box yet as it is raining in California. Both issues, delivery and rain are most unexpected.

by: wayne m. 03/12/2015

just what I needed. good price. fast shipping. thanks so much. have a great day.

by: Ulric 10/14/2021

Appears solid, well-assembled, and well galvanized. Not yet installed but looks good so far!

by: Jacques 12/02/2021

good easy to fix

Jacques G. One Year Later

12/3/2022

tres bien bon produit facile a changer [very good good product easy to change]

by: Joseph 02/08/2025

Great product. Don't let them ship USPS took 2 weeks. Ship UPS.

by: Donald 12/14/2019 One Year Later

One year of use, several thousand miles and still working great!

by: Travis 11/01/2021

Brakes fit like they were suppose to.

by: Carl 05/28/2016

best value for the money

by: Wesley 11/11/2022

Great parts thanks

by: Mike 03/19/2020

Product as described fast delivery

by: Matthew 07/24/2026

by: Jeff 08/04/2025

by: John 05/07/2021

by: Donald 05/11/2021

by: Dan 11/24/2024

by: Bruce 11/28/2024

true

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See what our Experts say about this Demco Accessories and Parts

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Can Hydraulic Brakes of Demco Tow Dolly be Converted to Electric Brakes
Since Demco uses 3,500 drum brake assemblies part # DMSB24429M and # DMSB24428M what you'd need is similar 3,500 electric brake assemblies like the etrailer part # AKEBRK-35L-SA for the left hand side and # AKEBRK-35R-SA for the right hand side. To wire these up you'd just need 10 gauge wire like the part # 10-1-1 which we sell by the foot. Then to add a 7-way the easiest way to do that is with the 7-way junction box # e99011.
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Surge Brakes for Demco KK260 Tow Dolly
Hey George! I do have brakes made specifically for your Demco KK260 Kar Kaddy! Demco Hydraulic Drum Brake - Single Servo - Galvanized - 10" - LH - Self-Adjusting - 3,500 lbs # DMSB24429M and Demco Hydraulic Drum Brake - Single Servo - Galvanized - 10" - RH - Self-Adjusting - 3,500 lbs # DMSB24428M will fit directly onto your tow dolly and they're made by Demco to work with a surge brake actuator. I was able to find other replacement parts for your KK260 dolly. What other parts or maintenance...
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Replacement Drum Brakes For A Demco Kar Kaddy SS Tow Dolly
Hi Mike! I assume yours is an older one? The new Kar Kaddy SS comes with disc brakes, which is why I ask. Anyway, the etrailer Hydraulic Trailer Brake - Uni-Servo - 10" - Right Hand - 3,500 lbs # AKUBRK-35R (and left hand # AKUBRK-35L) follows the standard 4-bolt mounting pattern (see attached picture), which may work with your Demco Kar Kaddy SS. But, I couldn't find the bolt pattern for it listed anywhere, so I would definitely measure this to make sure. If you get an odd measurement...
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Replacement Brake Assemblies and Master Cylinder for 2002 Demco Kar Kaddy KK360SB Tow Dolly
The replacement brake assemblies are # DMSB24429M for the left side and # DMSB24428M for the right. The replacement master cylinder is part # 5650.
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Need Hydraulic Trailer Brake Kit for 1999 Demco Kar Kaddy Model KK360
The Hydraulic Trailer Brake Kit, # AKUBRK-35 that you linked to is for a 10" diameter x 2-1/4" wide and for 4 bolt flange. It does appear that his will fit the application you are asking for, for the 1999 Demco Kar Kaddy Model KK360 with drum brakes. However, I will point out that we have the recommended replacement brake assemblies for the Demco Kar Kaddy in # DMSB24429M for the left side and # DMSB24428M for the right. The # AKUBRK-35 is a good product but Demco does recommend the...
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Correct Hydraulic Drum Brakes For Demco Kar Kaddy Tow Dolly
The Demco Kar Kaddy tow dolly does require these specific brakes, and there aren't other kits that will work, it does need the following: - Left Hand: Demco Hydraulic Drum Brake - Single Servo # DMSB24429M - Right Hand: Demco Hydraulic Drum Brake - Single Servo # DMSB24428M The reason for that is these brakes mount to a specific bolt pattern of 4 on 3.96" which is different than standard hydraulic brake kits; essentially, they are designed specifically for use with the Demco Kar Kaddy...
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Replacement Brake Assemblies for Demco Kar Kaddy Tow Dolly
The replacement brake assemblies for your Kar Kaddy are # DMSB24429M for the left side and # DMSB24428M for the right.
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How to Reduce Brake Pad Pressure to Allow Hub Removal from Demco Kar Kaddy
If you have removed the tang washer and castle nut from the spindle on your tow dolly and the hub still will not come off the brake pads you can try adjusting the brakes to reduce the pad pressure. They could be gripping the inside drum surface enough to make hub removal difficult. The brakes for the Kar Kaddy, such as right-hand part # DMSB24428M, are self-adjusting but they still have a star wheel adjuster at the bottom of the assembly, like brake kit # 18788-87, that can be accessed...
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Brake Mounting Hole Pattern for Demco # DMSB24428M Hydraulic Brake Assembly
The Demco # DMSB24428M hydraulic brake assembly uses an oddball bolt pattern that's laid out in a rectangle, rather than a square like what's usually found. When correctly aligned so the brake cylinder is at the top, the bottom holes measure 3.25 inches apart, center to center. The top holes are 2.40 inches apart from the bottom holes, again measured center to center. You can see this dimension in the photo I've edited for you. To clarify, the brake assembly you're wanting to replace is...
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Replacement Brake Assembly For Demco Car Dolly
If you are looking for brakes that will work with your Demco Car Dolly, we have just what you need. For the right hand you will need part # DMSB24428M. For the left hand side you need part # DMSB24429M. These are 10-inch x 2-1/4 inch brakes for 3,500-lb axles and are designed to work with 13 to 15-inch wheels. We do not offer the brake drums for the Demco car dolly.
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Trailer Brake Recommendation for LoadRite Boat Trailer with 10 x 2-1/4 Inch Wheels
There are many possible reasons why your brake could have failed. It is hard to specify why yours may have failed. I recommend checking the reverse lock-out on your actuator to make sure it is working properly. Backing up with your trailer connected if your reverse lock-out isn't functioning could be why your brakes failed. If the lock-out isn't working, you could use the Demco Hydraulic Drum Brake Assembly - Free Backing # 40716, # 40715. These brakes would allow you to back up with your...
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Does the Demco Hydraulic Drum Brake Assembly Come With the Drum?
I do have a solution for you but the answer to your question is no, the Demco Hydraulic Drum 3,500 lbs - 10" Brake Assembly # DMSB24429M is just the brake assembly without the drum. Keep in mind that when selecting a brake assembly and hubs that you make sure they will have the same weight capacity that your axle has. You will want to make sure that whichever brake assembly you choose that you get the Right Hand side as well, in this case it would be the Hydraulic Drum Brake part # DMSB24428M. I...
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Replacement Brake Assembly Recommendation for 1997 MasterCraft 20 ft Boat
Since your trailer has 10 inch by 2-1/4 inch brake assemblies currently all of the assemblies you mentioned are going to work. I would go with the sefl-adjusting part numbers # DMSB24428M and # DMSB24429M though since you mentioned you were interested in that option. The matching Titan assemblies are part # T4423500 for the left hand side and part # T4423400 for the right hand side. Based on the seal dimensions you listed the part # 168233 is the correct replacement. We don't carry...
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Do you have a question about this Accessories and Part?

Info for this part was:

Edited by:

Leah B

Expert Research:

Mike L

Expert Research:

Jeffrey L

Written by:

Lindsey S

Installed by:

Jeff D

Installed by:

Cole B

Updated by:

Laura H

Updated by:

Wilson B

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