bing tracking image
  1. Brake Actuator
  2. Dexter
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Lunette Ring
  6. 12500 lbs GTW
Dexter Adjustable-Channel Brake Actuator - Painted - Drum - Lunette Ring - Bolt On - 12,500 lbs
Dexter

Dexter Adjustable-Channel Brake Actuator - Painted - Drum - Lunette Ring - Bolt On - 12,500 lbs

Part Number: T4238500
In Stock
$612.62
Brake Actuator
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Videos

Need help with installation?
Locate installers near me
Adjustable-channel, surge-type actuator bolts over 3" wide trailer tongue and includes a lunette-ring coupler that can be mounted in three different positions to match your application. Unique roller design helps reduce resistance. 1-800-940-8924 to order Dexter brake actuator part number T4238500 or order online at etrailer.com. Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Adjustable-Channel Brake Actuator - Painted - Drum - Lunette Ring - Bolt On - 12,500 lbs. Brake Actuator reviews from real customers.
  • All Info
  • Reviews (18)
  • Q & A (0)
  • Videos (1)
  • Photos

Dexter Brake Actuator - T4238500

Highlights

  • Smooth, Automatic Braking: Surge design syncs trailer brakes with tow-vehicle slowing.
  • Built for Heavy Loads: Rated for 12,500 lbs GTW and 1,250 lbs tongue weight for tough jobs.
  • Adjusts to Your Setup: 3-position channel lets you set lunette ring height to match your hitch.
  • Tough Steel Build: Rigid frame resists bending in jackknife or off-road conditions.
  • Straight, Stable Stops: Roller design reduces resistance during telescoping for smooth travel.
  • Easy Bolt-On Fit: Mounts over a 3" channel tongue with primed finish ready for paint.

Features to know about

Heavy Loads Made Manageable: 12,500-lb Surge Actuation

This actuator is built to handle serious weight. With a 12,500-lb capacity and 1,250-lb maximum tongue weight, it’s ready for heavy farm or construction trailers that run drum brakes. The hydraulic surge system automatically syncs your trailer brakes with your tow vehicle, so braking feels consistent and controlled even when you’re carrying a full load.

Smooth Operation Every Time: Roller-Assisted Telescoping Design

The unique roller design keeps the inner slide moving in a straight line with less resistance. That means smoother engagement when the trailer pushes forward and more reliable braking without binding or jerking. It’s a simple mechanical advantage that makes every stop steadier and easier to manage.

Built to Take a Beating: Durable Steel Housing

The actuator’s sturdy steel construction is made to resist bending in jackknife situations and hold up under daily use. The primed finish gives you a good base for paint so you can match it to your trailer and add another layer of protection against the elements. It’s tough enough for work trailers that see constant use in rough conditions.

Dial In Your Setup: 3-Position Adjustable Channel with Lunette Ring

Getting the height right is easy with the 3-position adjustable channel. You can raise or lower the included lunette ring within a 4" vertical range, which helps line up your pintle hitch perfectly for level towing. The bolt-on design fits over a standard 3" channel tongue so you can mount it solidly without special brackets or welding.

Added Safety on the Road: Built-In Breakaway Kit

A built-in breakaway kit keeps things under control if your trailer ever separates from the tow vehicle. It’s designed to apply the brakes automatically in an emergency, helping prevent runaways and giving you extra peace of mind whenever you’re hauling heavy gear.

Specs

Application

  • Application: hydraulic drum brakes

Mounting

  • Mounting: 3" wide channel tongue
  • Vertical range of adjustment: 4"

Weight and Capacity

  • Capacity: 12,500 lbs
  • Maximum tongue weight: 1,250 lbs

Warranty

  • Warranty: 1-Year warranty

068-127-00 Dexter Axle Model 10 Actuator with Lunette Eye and Leveler Channel - Drum Brakes - Primed Finish

Replaces Titan 4238500





Video of Dexter Adjustable-Channel Brake Actuator - Painted - Drum - Lunette Ring - Bolt On - 12,500 lbs
Video Thumbnail Video Player Dialog

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




Video Transcript for A Closer Look at the Dexter Adjustable-Channel Brake Actuator

Hello everybody. This is Jeff at etrailer.com. Today we're gonna take a look at this Titan bolt-on adjustable channel drum break actuator with the lunette ring. Has a 12,500 pound gross towing weight capacity. Now this hydraulic actuator will activate your trailer's brakes when your tow vehicle slows or stops. Basically what happens is when you apply the brakes in your tow vehicle, deceleration occurs, and the momentum will push your trailer toward the rear of your vehicle.

And with a surge brake system like this the actuator is triggered as your trailer moves forward once your tow vehicle starts to slow down. So when this happens, this actuator, the inner portion here will contract and it applies force to the master cylinder in the back here. And this in turn supplies the necessary hydraulic pressure to engage your trailer's brakes. This one is a unique top roller design. Roller right up here at the top.

This roller reduces the resistance during the telescoping to create nice straight line movement. Also, if you notice, they do insert a grease zerk fitting on the end of the roller. So it allows you to attach a grease gun to it and pump grease in there for easy lubrication. This is an adjustable channel design. Has three different mounting positions for your coupler.

The lunette ring here is for use with pintle hitches. So you can move it up or down into three different positions gives you a vertical range of about four inches of adjustment. This is a nice sturdy, durable steel construction. Resists bending in any jackknife situations. You can see it has a nice prime finish to it to provide corrosion resistance.

Now the breakaway kit, right here if you notice this chain with the hook on the end attaches to this lever right here. This is a breakaway kit and that prevents a trailer runaway situation and it is required by law. Basically, when you hook up to your tow vehicle you will also hook this hook to your tow vehicle. So the chains hook to it, and what that does, if by chance this comes detached from your tow vehicle, it'll pull that chain, which will activate the lever. And then that lever activates the master cylinder to apply the brakes. So it'll prevent a trailer runaway situation. Now this is a bolt on installation. If you look down here at the bottom, it does mount to a straight three inch wide trailer tone. Application. This is for trailers with hydraulic drum brakes. Gross towing weight capacity is 12,500 pounds. Next one-ton weight capacity is 1,250 pounds. And one note I do wanna mention on this is because this actuator does not include a reverse lockout on the back here of the master cylinder, it is recommended that you equip the trailer with either the reverse lockout solenoid that'll screw in line here, or that you have free-backing brakes on your trailer so that you could drive in reverse without this actuator triggering your trailer's brakes. But that should do it for the review on this Titan bolt-on adjustable channel drum break actuator with the lunette ring. Has a 12,500 pound gross towing weight capacity..

Customer Satisfaction Score:

Ratings & Reviews

4.7

18 reviews
Review sort icon
Adjustable-channel, surge-type actuator bolts over 3" wide trailer tongue and includes a lunette-ring coupler that can be mounted in three different positions to match your application. Unique roller design helps reduce resistance.

by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:

LENGHT OF TIMETOFRECEIVE



by:

Top notch!! Fast delivery!! Product cost is 20% less than other vendors.
Price, time and quality can't be beat!



by:

it was exactly as the one on the trailer, good job



by:

Great product, super heavy duty, well constructed . Built with top quality material ! Scale of #1 to #10 - #10,no question about it! A+++++ ! Pleased with the price, product, and the service !!! Thank you!



by:



by:



by:

Great job.



by:

Had two trailers down you have wide selection and in stock parts I buy thousands of dollars of parts from Tex Trail and their selection is minimal


18
18

See what our Experts say about this Dexter Brake Actuator


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Manda E
Updated by:
Manda E
Employee Ryan F
Updated by:
Ryan F

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 1-800-940-8924