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Dexter Brake Actuator w/ Electric Lockout - Drum - Zinc - 5 Position Adjustable Channel - 12.5K
Dexter

Dexter Brake Actuator w/ Electric Lockout - Drum - Zinc - 5 Position Adjustable Channel - 12.5K

Part Number: T4857220
$602.46
Brake Actuator
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Bolt-on surge brake actuator with adjustable drop channel lets you mount a coupler (sold separately) in 1 of 5 positions to fit your application. Electric lockout lets you back up without activating trailer brakes. Roller design reduces resistance. 1-800-940-8924 to order Dexter brake actuator part number T4857220 or order online at etrailer.com. Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Brake Actuator w/ Electric Lockout - Drum - Zinc - 5 Position Adjustable Channel - 12.5K. Brake Actuator reviews from real customers.
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Dexter Brake Actuator - T4857220

Highlights

  • Back Up Without Brake Drag: Electric lockout stops the brakes from engaging when reversing.
  • Smooth, Reliable Stops: Hydraulic surge design applies drum brakes automatically as you slow.
  • Handles Heavy Loads: Rated for 12,500 lbs GTW and 1,250 lbs tongue weight for confident towing.
  • Perfect for Boat or Utility Trailers: Zinc-plated steel resists rust and corrosion in wet use.
  • Fits a Range of Couplers: 5-position adjustable channel adapts to your coupler height needs.
  • Quick Bolt-On Mounting: Installs to a straight 3" trailer tongue with standard hardware.
Made in USA

Features to know about

Smooth and Confident Stops: Hydraulic Surge Design for Drum Brakes

The hydraulic actuator takes care of braking automatically when your tow vehicle slows down. As the trailer moves forward, the surge mechanism activates the master cylinder to apply hydraulic pressure to the drum brakes. The roller design inside helps it move straight and smooth, reducing resistance so braking feels steady and controlled every time. It’s rated for 12,500 lbs gross towing weight and 1,250 lbs maximum tongue weight, giving you strong, reliable stopping power for heavy loads.

No Brake Drag When Reversing: Built-In Electric Lockout

Backing up a trailer with surge brakes can be frustrating if the brakes engage when you don’t want them to. The built-in electric reverse lockout solves that problem by automatically preventing brake activation when you shift into reverse. The solenoid connects through a 5-pole flat, 6-way round, or 7-pole trailer connector and does all the work for you. A built-in shield protects the valve from the elements so it stays reliable over time.

Level Towing Made Easy: 5-Position Adjustable Drop Channel

The actuator’s offset adjustable channel gives you five mounting positions so you can set your coupler (sold separately) exactly where it needs to be. It’s especially handy for tall trailers, letting the coupler sit lower than a standard center-mounted setup for a level, balanced connection. Whether you’re using a ball coupler, lunette ring, or clevis attachment, the channel design keeps setup simple and adaptable.

Built to Withstand Rough Conditions: Zinc Finish and Heavy Steel Frame

A zinc-plated steel body protects against corrosion from rain or road spray, making it a solid choice for trailers that see all kinds of weather. The sturdy construction resists bending if the trailer jackknifes or twists under load. It installs with a straight bolt-on mount for a 3" wide tongue and comes ready to handle regular use on trailers that need a dependable actuator.

Added Safety on Every Trip: Integrated Breakaway Kit

If your trailer ever disconnects from the hitch, the built-in breakaway kit automatically engages the brakes to bring it to a stop. It’s already part of the actuator, giving you an extra layer of protection without needing separate components or add-ons.

Specs

Application

  • Application: trailers with hydraulic drum brakes

Weight and Capacity

  • Gross towing weight: 12,500 lbs
  • Maximum tongue weight: 1,250 lbs

Mounting

  • Mounting: straight, 3" wide trailer tongue
  • Mounting hole diameter (standard): 17/32"
  • Mounting hole diameter (larger): 21/32"

Warranty

  • Warranty: 1-Year

068-390-01 Dexter Axle Model 10 Brake Actuator w/ Electric Lockout and 5-Position Leveler Channel - Drum - Bolt On - 12,500 lbs

Replaces Titan 4857220





Video of Dexter Brake Actuator w/ Electric Lockout - Drum - Zinc - 5 Position Adjustable Channel - 12.5K
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Dexter Brake Actuator w/ Electric Lockout Spec Review

Hello everybody. This is Jeff fi trailer.com. Today we can gonna take a look at this Titan adjustable channel down hydraulic drum break actuator with the elec electric reverse lockout. And it has a 12,500 pound gross towing weight capacity. Now this hydraulic actuator will activates 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 the trailer toward the rear of your vehicle.

So with the surge brake system the actuator is triggered as your trailer moves forward. Once the tow vehicle starts to slow down. So when that happens, this inner slide portion of the x-ray will contract and it applies force to the master cylinder in the back here. So this in turn supplies, the necessary hydraulic pressure to engage your trailer's brakes. This one is a unique roller design has the roller right up here.

This will reduce resistance during that telescoping to create nice straight line movement. Also, if you notice on the end of that roller where it does have a grease CI fitting which will allow you to attach a grease gun to it and then pump grease in there to lubricate it. This is a sturdy steel durable steel construction resist bending in any Jack knife situations. We mentioned this one at the very back here. If you notice the wires it does have an electric reverse lockout.

So I, this will let you back up without actuating your trailer brakes. Basically that electric reverse lockout is automatically activated. When you shift your tow vehicle into reverse basically the wires here will wire into your trailer connector, which connects to your tow vehicle so that it can detect when you're in reverse. When it is in reverse. This solenoid ensures that that hydraulic actuator does not activate the trailer's brakes, thus allowing you to bake up, back up the vehicle.

Now because of the wiring here it will require this feature does require either a five way flat six way round or a seven way trailer connector to connect it to also if you notice has its nice built in shield over it which will protect that OID valve from the elements and any damage front you'll notice has this offset adjustable channel that goes in the down position has five different mounting positions for your coupler. Now the couple is not included. We do sell that separately and that builtin drop is great for you. Some tall trailers, the channel height on this. If we put a ruler on it it's very bottom to the top and we're at 12 inches. The inside width of the channel's gonna be right at three inches. Now the distance between these mounting holes center to center is two inches. So it does give you a range of 10 inches of vertical adjustment. Now, if you notice this does include let me just unhook it here so we can show you but it will include this breakaway chain and hook that is included, and it is required by law. Basically what this does is prevents a trailer runaway situation. So what you end up doing is taking the hook on this end and attaching that to your tow vehicle. And once that's attached to your tow vehicle then you're hooked up and you towing. If by chance your trailer would become detached from your tow vehicle, it would pull this chain which would activate that lever which would then activate the pressure in the master zone to apply the brakes and prevent a runaway situation. Again, it is included and it is required by law. Now this does have a nice zinc finish on it on the outer on the whole unit gives you a nice protection corrosion resistant protection. It is a bolt on installation. It is designed to Mount to straight three inch wide trailer tongue. Again, the application. This is for trailers with drum breaks gross towing weight capacity on is 12,500 pounds. And the maximum tongue weight is 1,250 pounds But that should do it for the review on this Titan adjustable channel down hydraulic drum break actuator with the electric reverse lockout and a 12,500 pound gross towing weight capacity..

Ratings & Reviews

5.0

3 reviews
Review sort icon
Bolt-on surge brake actuator with adjustable drop channel lets you mount a coupler (sold separately) in 1 of 5 positions to fit your application. Electric lockout lets you back up without activating trailer brakes. Roller design reduces resistance.

by:

excellent kit



by:

excellent item



by:

Excellent items


3
3

See what our Experts say about this Dexter Brake Actuator

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  • Can You Add a Lockout to the Demco Hydraulic Brake Actuator DM8759241
    The Demco Hydraulic Brake Actuator part # DM8759241 does not come with a lockout but you can add a manual one with the Manual Reverse Lockout Kit for Demco Hydraulic Trailer Brake Actuators part # DM5939. If you are looking for an electric lockout you can use the Titan Brake Actuator w/ Electric Lockout part # T4857220 which has a 12,500 lb weight capacity but is not offered in an 8,000 lb model.
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  • What is the Size of the Mounting Holes on Titan Model 10 Brake Actuator 4857220
    The 3 holes on the tongue mount of the Titan Brake Actuator w/ Electric Lockout # T4857220 are 17/32" in diameter; the larger holes are 21/32" in diameter.
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  • Adjustable Channel Drum Brake Actuator With Electric Lockout
    We do have exactly what you need, though the Titan Adjustable-Channel Brake Actuator - Painted - Drum - 2-5/16" Ball - Bolt On - 12,500 lbs # T4238300 does not come with an electric lockout. Instead you will need the Titan Brake Actuator w/ Electric Lockout - Drum - Zinc - 5 Position Adjustable Channel - 12.5K # T4857220 with the Titan Trailer Coupler - Adjustable Channel Mount - Trigger Latch - Primed - 2-5/16" Ball # T1882000. These parts make up the same actuator as the one you asked...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Manda E
Updated by:
Manda E
Employee Amanda M
Written by:
Amanda M

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