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Dexter Galphorite Free-Backing Hydraulic Trailer Brake Assembly - 10" - Left Hand - 3,750 lbs

Dexter Galphorite Free-Backing Hydraulic Trailer Brake Assembly - 10" - Left Hand - 3,750 lbs

Item # T4423500
Our Price: $87.46
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Shipping Weight: 10 lbs
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Drum brake assembly provides superior protection from corrosion and lets you reverse without actuating. Designed for use with hydraulic brake actuators that do not include reverse lockouts. Fits most 13", 14" and 15" wheels. 1-833-496-1390 to order Dexter accessories and parts part number T4423500 or order online at Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Galphorite Free-Backing Hydraulic Trailer Brake Assembly - 10" - Left Hand - 3,750 lbs. Accessories and Parts reviews from real customers.
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  • Reviews (50)
  • Q & A (0)
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  • Why etrailer?

Dexter Accessories and Parts - T4423500

  • Trailer Brakes
  • Hydraulic Drum Brakes
  • Brake Assembly
  • 10 x 2-1/4 Inch Drum
  • Dexter
  • LH
  • Free Backing
  • 3500 lbs

Drum brake assembly provides superior protection from corrosion and lets you reverse without actuating. Designed for use with hydraulic brake actuators that do not include reverse lockouts. Fits most 13", 14" and 15" wheels.


  • Galphorite plating delivers superior corrosion protection
    • Backing plate and shoe levers are sealed with permanently bonded electrocoat primer
    • Second coat of rugged acrylic is applied to backing plate - nearly rustproof
    • Wheel cylinders are treated with hot black oxide
    • Internal components are olive drab, zinc plated
    • Stainless steel springs
  • Free-backing design lets you reverse without trailer brakes being activated
    • Specifically designed for use with surge-style trailer brake actuators
    • Hydraulic pressure is contained by wheel cylinder


  • Left-hand assembly - driver's side
  • Dimensions: 10" wide x 2-1/4" thick
  • Pad lining: 44 sq in
  • Wheel size: 13", 14" or 15"
  • Mounting flange bolt pattern: 4 bolt
    • 2-7/8" Distance between mounting holes
  • Mounting bolts sold separately
  • Center hole diameter: 3"
  • Axle rating: up to 3,750 lbs
  • 1-Year warranty
    • 2-Year corrosion warranty

The unique free-backing design, patented by DICO, lets your trailer move in reverse without actuating the brakes. When you begin backing up, the brake shoes are firm against the drum, as in a braking situation. As you continue in reverse, however, the shoes turn with the drum until the lining pressure is released and you are able to back up freely.

These brakes are designed to eliminate friction between the shoes and drum when you are driving in reverse. A trailer breakaway kit will not be effective should your trailer disconnect from your tow vehicle when backing up.

023-548-00 Dexter Axle Premier Freebacking Brake Assembly - 10" x 2-1/4" - Left

Replaces Titan 4423500

Customer Satisfaction Score:

Customer Reviews

Dexter Galphorite Free-Backing Hydraulic Trailer Brake Assembly - 10" - Left Hand - 3,750 lbs - T4423500

Average Customer Rating:  4.8 out of 5 stars   (50 Customer Reviews)

Drum brake assembly provides superior protection from corrosion and lets you reverse without actuating. Designed for use with hydraulic brake actuators that do not include reverse lockouts. Fits most 13", 14" and 15" wheels.


The brake assemblies were not individually boxed like the last time I bought these, but thrown in a box all together where they were free to bang and scrape against each other during shipment. This resulted it the anti-corrosion coating being scraped off in many places.


Awesome product, working very well on my trailer. Of course system is flushed with fresh water after each use.$


etrailer Corp.Great service,quick shipping, proper fit and they care about there customers. With that said a picture is worth a thousand words.


Great deal. my original order was not going to be in for 2 weeks. I was notified of this and choose other drums. was able to track all the way, I liked that. I received them yesterday and they are now installed. My 2nd time working with etrailer and i will continue.

Still working great. They work very well.
Marty - 01/30/2018


I purchased a StarCraft Islander and couple years ago and the hydraulic surge brakes on the trailer never worked. Needing to get the brakes working I inspected what I had and what the problems were. The springs were rusted, with some broken, the wheel cylinders were seized and the pads looked to be in rough shape. I ordered the left and right Titan Galphorite Free-Backing Hydraulic Trailer Brake Assembly from etrailer and just a few short days later they were on my door step. Installation was a breeze and afterwards I have great working trailer brakes again. Etrailer is the only way to go. Shipping is fast and their prices are very good.


This assembly saved me time on the order and installation. It was a direct replacement for my 30 year old Titan brake assembly. It is a quality part, delivered quickly with great service!


After 25 years of using my utility trailer, it is in need of new backing plates & brake assemblies. Your parts arrived in record time & the parts look to be perfect replacements for the road-weary rusty brake assemblies. The tail light lens also fit perfectly. Thank You for the quality products.


Backing plates and bearings were perfect match. For the price, it is well worth purchasing the assembly as all you have to do it bolt it on....

Not sure why there was a bolt and locking nut (loose) through the front brake pad flange onto the post flange, maybe for shipping, but it is not necessary and a pain in the butt to remove with the springs installed. If it is there for shipping purposes, then maybe use a zip tie or something easier to remove.


Brake installation and bleeding process was easy. I had never performed a brake install before. Happy with the coating on all the parts as this is a boat trailer. Free wheel backing seems to be working well. Old brake solenoid had evidently seized up so this was a good fix but also an upgrade with coating and free wheel backing.


Excellent product at a good price. etrailer was only souce I found that had it in stock.
Stock was important as backing plate anchor failed on my trailer & I was scheduled at a tournament in 10 days when I discovered the problem.
Got it quickly & installed the same day received so I was able to make the tournament. Thanks etrailer!


I wished that the brakes had come with bolts to attach. Now I have to some bolts that are rated for this set of brakes.

I love the fact that they are all assembled! Keeps me from screwing it up.


Exactly as stated. Quality for a good price. etrailer provides excellent customer service. Fast shipping, great price and excellent communication with the buyer A+++++++ I will do business with them again


Perfect fit and good price. Disassembled and painted over original finish for more salt protection before install. Almost corrosion free after a year and no mechanical problems. Second set I have purchased for 18 year old trailer so I am more than satisfied with salt water performance.


Great transaction and the brake assemblies fit perfectly. I initially got the wrong size and they reimbursed me accordingly and had four new assemblies mailed out immediately. I will use etrailer in the future for all towing and trailer needs.


I purchased the left side and right side from sales woman Donna P. she was very helpful and knowledgeable. It took an hour per side 4 bolts and brake line ,bleed line put hub back on and set bearing all done. Everything fit perfect. By the way there are videos that my be helpful for beginners.


product fit was spot on, installation was straightforward and the performance since installation, over 2500 miles of driving, has been flawless.


Excellent prices, exact fit to my trailer. Highly recommend


Haven't installed everything yet but was really impressed with delivery and follow-up. Ordered Sunday (with confirmation of order and shipment), received Tuesday (with notification). Given other reviews, I expect the install to be equally efficient. Thanks etrailer!


Parts installed easily, at least as easily as parts install on an old rusty trailer. Work well once adjusted.


All the parts fit perfectly on my Shorelandr trailer


Great product for the price. Super fast shipping. Only complaint was that item was all scratched up when I recieved it so I had to touch it up with paint to make sure it didn't rust.


This complete assembly will make it a lot easier to re do my brakes on my boat trailer


These are replacements on a boat trailer. Construction and materials seem to be top-notch. Easy installation and adjustment. Time will tell but they should provide years of dependable service.


Brake assembly performing as expected.Good price.


Products were as listed. All seals fit. Arrived earlier than expected. Will do business here again.

Show More Reviews

See what our Experts say about this Dexter Accessories and Parts

  • Do Hydraulic Free Backing Trailer Brakes Resist Being Reversed
    Sounds like you are fine. Free backing plates will resist backing up for a second but then they release and allow the wheels to turn. If you are trying to turn things by hand with the trailer in the air that's why things seem more difficult. 5 clicks back from lock up by hand should be about right. It should feel like there's a noticeable drag as you turn them by hand but they should still be able to spin.
    view full answer...
  • Can Titan Free-Baking Trailer Drum Brakes Be Used with Brake Actuating Couplers with Reverse Lockout
    You can use Titan Galphorite Free-Backing Hydraulic Trailer Brake Assembly, # T4423400, with a brake actuating coupler with reverse lockout provided the actuator is designed for use with drum brakes. You will be able to back up whether the reverse lockout is engaged or not because hydraulic pressure is contained by the wheel cylinder nullifying the lockout. Basically, what will happen is when you start backing up, the brakes will grab a little and then with continued backward motion they...
    view full answer...
  • Will Titan Hydraulic Drum Trailer Brake Assemblies Fit a 1999 Jayco Pop-Up Camper
    If your 1999 Jayco trailer has 13 to 15 inch wheels and it has 10 inch by 2-1/4 inch hydraulic brakes that have a 4 on 4 mounting pattern and 3 inch diameter center hole for a 3,750 pound axle, then you will be able to use this brake assembly, # T4423400. This is the right hand side assembly. The left hand side is # T4423500. I have included a link to the installation details for you to view.
    view full answer...
  • Titan Brake Assemblies for 3500 lb Axle with 4 Bolt Flange
    The part you were asking about has been discontinued but wouldn't work for your flange. Instead, you would bolt brake assemblies like the Titan Galphorite Free-Backing Hydraulic Trailer Brake Assembly Right Hand # T4423400 and the left hand version # T4423500 to a four bolt mounting flange. The # T1544600042 that you referenced will ride on to the spindle of your trailer and will spin with the wheel assembly. It will be held to the brake assemblies that will remain stationary and bolted...
    view full answer...
  • Replacement Brake Assembly Recommendation for a Dico 15638 Assembly
    Your Dico brake assemblies are 10 inch by 2-1/4 inch so the part # T4423400 and # T4423500 would both work as replacements. There is quite a bit of overlap between Titan and Dico parts.
    view full answer...
  • Can Free-Backing Trailer Brakes be Used on a Trailer with a Reverse Lock Out
    Free backing brake assemblies can be used on a trailer that has a reverse lockout. If it's a manual lockout they would allow you to back your trailer up at any given moment without having to get out and activate the lockout. As long as your hub/drums are 10 by 2-1/4 the part # T4423400 for the right hand side and part # T4423500 for the left hand side would be a great choice.
    view full answer...
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  • Can Parking Brake Lever be Added to Titan Brake Assembly?
    The Titan Galphorite Free-Backing Hydraulic Trailer Brake Assembly - 10" - Left Hand # T4423500 would not be compatible with your parking brake lever.
    view full answer...
  • How To Choose the Correct Brake Assembly For Older Boat Trailer
    I am happy to help you replace the brake assemblies on your boat trailer, however brake assemblies are not trailer specific. To determine the brake assemblies that will fit your trailer, you would need to know your axle's weight capacity, the size of your wheels, your mounting flange bolt pattern and the inside diameter and depth of your hub. This particular Left Hand Titan Galphorite Free-Backing Hydraulic Trailer Brake Assembly part # T4423500 fits a 13", 14" or 15" wheel, has a 4 on...
    view full answer...
  • Can I Re-Use DICO-15638 Hubs with New Electric Brake Assemblies?
    Some hub/drum assemblies can accept either electric or hydraulic brakes and some can only accept one or the other. It has to do with the size or in your case how the drums are cast. Some drums have uneven castings and you need a smooth inside of your drum with electric brakes so the magnets can make full contact and engage the brakes. The Titan Galphorite Free-Backing Hydraulic Trailer Brake Assembly - 10" - Right Hand item # T4423400 are 10" wide x 2-1/4" thick. The left handed ones...
    view full answer...
  • Will Titan Hydraulic Brake Assemblies # T4423500-400 Fit DICO 15638 Hub/Drums
    The DICO brake drums 15638 you have are designed for 10 inch by 2-1/4 inch brake assemblies like what the brake assembly kit part # T4423500-400 you referenced provides so these would fit and work well for you.
    view full answer...
  • Can Free-Backing Plates be Used with Actuator that Has Reverse Lock Out
    Free backing plates would be redundant if the actuator of your trailer already has a reverse lockout but prevents the brakes from applying when backing up but they wouldn't hurt anything otherwise. So if you wanted to use the part # T4423500-400 there's no reason you couldn't.
    view full answer...
  • What is Most Common 10 inch Diameter Trailer Brake Assembly Capacity
    In the 10 inch brake size the most popular axle capacity is 3,500 lb. I'd be surprised if you had a higher or lower capacity than that but typically you can find the axle capacity either listed on the VIN plate of the trailer or even on the axle itself. A slightly higher capacity at 3,750 lbs for the assemblies wouldn't make a noticeable difference though so the part # T4423500-400 would work.
    view full answer...
  • Left and Right Hand Side Dexter 3,500 lb Galphorite Hydraulic Titan Brake Assembly Recommendation
    For the matching set you would want the part # T4423500 for the left hand side and part # T4423400 for the right hand side. The part number # T4445300 is being phased out, but the two I mentioned are the replacements for it. I attached a review video for you to check out as well.
    view full answer...
  • Replacing Hydraulic Brakes With Electric Drum Brakes On Trailer
    I have attached a link to a helpful article that explains what is needed to add electric drum brakes to a trailer. Your Dico brake assemblies are 10 inch by 2-1/4 inch so the part # T4423400 and # T4423500 would both work as replacements. The best way to make sure you get the right components is to pull the hub and get the bearings numbers from the side of the bearings as shown in the attached photo. If you cannot find the numbers on the bearings, I recommend using a digital caliper...
    view full answer...
  • Will theTitan Hydraulic Brake Kit T4423500-400 Work With a 7,000 lb Actuator
    Yes, the Titan Zinc-Plated, Leverlock Brake Actuator part # T43329007K will be sufficient to power two sets of the Titan Hydraulic Brake Kit part # T4423500-400. The combined weight capacity of the braking assemblies can exceed that of the coupler.
    view full answer...
  • Will 4 Bolt Mounting Spacing on Titan Hydraulic Brake Kit Match 2-3/4 Spacing for Backing Plate
    The 4-bolt hole mounting pattern for the Titan Hydraulic Brake Kit # T4423500-400 that you referenced will match up with your bolt spacing. For your hydraulic braking system this is an excellent option especially if you have a surge brake actuator. The free-backing feature allows you to back your trailer up without activating the brakes and the Galphorite plating provides superior corrosion protection. You just need an adjustment spoon like part # W80630 to properly adjust your brakes.
    view full answer...
  • Recommendation for Corrosion Resistant 10 x 2-1/4 Hydraulic Trailer Brake Assemblies
    The hydraulic drum brakes that are good for marine applications are going to be the galvanized models like # 40716 as an example. Others, like the Galphorite coated assemblies, like # T4423400, also offer excellent corrosion resistance. Any assembly that does not have a special coating and/or is not galvanized then that would indicated it is powder coated steel, like # 23-312, and is not ideal for marine applications. If you are looking for 10 x 2-1/4 assemblies for marine applications,...
    view full answer...
  • Replacement Titan Brake Shoes For 10" Free Backing Hydraulic Brakes
    We do carry reaplcement brake shoes for the Titan 10" free backing brakes with part # T4744800 and part # T4742700 for uni-servo 10" Titan hydraulic brakes (standard brakes). We do not carry them as a kit for all 4 wheels however, it may be more cost effective to just replace the whole braking assembly instead of the brake shoe. If you have free backing brakes on the trailer I recommend Titan Hydraulic Brake Kit - Free Backing - Galphorite part # T4423500-400 which have a galphorite plating...
    view full answer...
    Image 1 for
  • Available 6K Weld-On A-Frame Drum Brake Actuators
    Thank you for the photo of your trailer tongue and actuator coupler. The one weld-on 6K drum brake actuator we offer is the Titan Multi-fit A-Frame Actuator # T2492800. This accepts 1-7/8-inch, 2-inch and 50mm hitch balls and includes a breakaway kit. It will fit 50-degree a-frame trailers. Note that this coupler does not include a reverse lockout so it best paired with free-backing brakes like # T4423400 and # T4423500. All 6K drum brake actuators for 2-inch balls are shown on the linked...
    view full answer...
    Image 1 for
  • Are Mounting Bolts Included with the Titan 10" Hydraulic Brake Kit
    The Titan 10" Hydraulic Brake Kit - Free Backing part # T4423500-400 does not come with the installation hardware but we do have exactly what you will need with the Mounting Bolts and Hardware for 10" Single Brake Assembly part # BRKH10AS. You will require one hardware kit per assembly you are installing.
    view full answer...
  • Determining Which Brakes Fit 10" x 2-1/2" Drums On Boat Trailer
    Based on the information you provided either the Titan Hydraulic Brake Kit - Free Backing - 10" - Left and Right Hand Assemblies - 3,750 lbs # T4071600-500 or # T4423500-400 will fit your drums. The only difference between these two brakes is the # T4071600-500 are made of standard metal where the # T4423500-400 have a Galphorite coating giving it superior corrosion resistance. Since you are putting these brakes on a boat trailer I recommend the # T4423500-400 as they will be less likely...
    view full answer...
  • 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...
    view full answer...
  • How To Add 10 Inch Surge Brakes To a 2,500 Lb Trailer Axle On a Boat Trailer
    Yes, the Titan Zinc-Plated, Leverlock Brake Actuator part # T43329007K will be sufficient to power two sets of the Titan Hydraulic Brake Kit part # T4423500-400 and the Dexter Trailer Hub and Drum Assembly part # 8-247-50UC3 will work with these as well as the spindles on your trailer if what you provided is correct. The weight capacity for the actuator is for the coupler portion, not the master cylinder so you could use braking assemblies that exceed this without issue.
    view full answer...
  • Recommended Replacement Brake Assemblies For Eagle Trailer Drum Brakes
    We have a few product options to replace your brake assemblies. I recommend the Hydraulic Brake Kit - Uni-Servo - Free Backing - Dacromet - 10" - Left/Right Hand - 3,500 lbs # AKFBBRK-35-D. This will give you both assemblies for one axle. These are free-backing so you can back up with your trailer without engaging the trailer brakes. They are marine-grade and designed for boat trailers. The dacromet coating offers corrosion resistance. Another really nice option is the similar brake...
    view full answer...

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