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  1. Brake Actuator
  2. Dexter
  3. Surge Brake Actuator
  4. Disc Brakes
  5. Channel
  6. 12500 lbs GTW
Dexter Brake Actuator w/ Electric Lockout - Disc - Zinc - 5 Position Adjustable Channel - 12.5K
Dexter

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

Part Number: T4857020
$591.11
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 T4857020 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 - Disc - Zinc - 5 Position Adjustable Channel - 12.5K. Brake Actuator reviews from real customers.
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  • Reviews (3)
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  • Videos (1)
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Dexter Brake Actuator - T4857020

Highlights

  • Smooth, Automatic Braking: Hydraulic system activates trailer disc brakes as you slow down.
  • Back Up Without Brake Drag: Electric lockout keeps brakes from engaging when reversing.
  • Built for Heavy Loads: Handles up to 12,500 lbs GTW and 1,250 lbs tongue weight.
  • Perfect for Marine Use: Zinc-plated steel resists rust and corrosion in wet conditions.
  • Adjusts to Fit Your Setup: 5-position drop channel levels tall trailers or custom builds.
  • Added Safety: Breakaway kit engages trailer brakes if it disconnects while towing.
Made in USA

Features to know about

Confident Braking: Hydraulic Power with 12,500 lbs GTW

This bolt-on surge brake actuator delivers strong, consistent braking for trailers with disc brakes. When your tow vehicle slows, the actuator’s hydraulic system automatically applies pressure to your trailer brakes—no wiring or electronics needed for braking control. It’s rated for a gross towing weight of 12,500 lbs and a maximum tongue weight of 1,250 lbs, giving you reliable stopping power during heavy-duty hauls.

Easy Backing: Built-In Electric Lockout

The built-in electric reverse lockout keeps your brakes from engaging when you shift into reverse. It wires into a 5-pole flat, 6-way round, or 7-pole trailer connector so it activates automatically when you back up. That means you can reverse up an incline or around tight corners without the trailer brakes interfering, all while the integrated shield protects the solenoid from the elements.

Level Towing Made Simple: 5-Position Adjustable Drop Channel

The offset adjustable channel offers five mounting positions for your coupler (sold separately), making it easy to fine-tune the height for a level trailer setup. The built-in drop is especially useful for tall trailers, letting the coupler sit lower than a standard center mount. Whether you’re using a ball coupler, lunette ring, or clevis attachment, this channel gives you the flexibility to get it right every time.

Smooth Operation: Low-Friction Roller Design

Inside the actuator, a unique roller design reduces resistance during telescoping. That low-friction movement keeps braking smooth and direct, helping create straight-line motion between your trailer and tow vehicle. It also adds durability by minimizing internal wear over time, even under frequent heavy load use.

Built to Last: Zinc-Plated Steel Construction with Breakaway Kit

The sturdy steel body resists bending in jackknife situations and comes zinc-plated for corrosion resistance—great for use around water or in wet climates. A breakaway kit is included to help stop your trailer if it ever disconnects from your tow setup. With its tough finish and dependable design, this actuator is made to stay solid through years of towing.

Specs

Application

  • Application: trailers with disc brakes

Weight and Capacity

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

Mounting

  • Mounting: straight, 3" wide trailer tongue

Warranty

  • Warranty: 1-Year warranty

Dimensions

  • Length: 16.44"
  • Height: 5.138"

068-388-00 Dexter Axle Model 10 Brake Actuator w/ Electric Lockout and 5-Position Leveler Channel - Disc - Bolt On - 12,500 lbs

Replaces Titan 4857020





Video of Dexter Brake Actuator w/ Electric Lockout - Disc - 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 Review

Michael: Hi there. I'm Michael with etrailer.com. Today, we're going to take a quick look at this Titan brake actuator with electric lockout.This is going to mount onto your trailer with a three inch wide straight tongue. And with disc brakes, this will apply the brakes on your trailer when you are slowing and stopping your vehicle. Basically, the way this works as your vehicle comes to a stop, the momentum of the trailer is going to keep pushing it forward, which will then cause the actuator to compress. As it compresses, it's going to pump that hydraulic fluid to your hydraulic brakes to apply the brakes and slow your trailer down as well.Now, this does have a really nice, unique roller design, that's going to help reduce resistance as it is telescoping in and out, and it's going to help create a nice straight line movement, so you're not going to have to worry about binding or getting stuck or anything like that.This does have a sturdy, durable steel frame, steel construction to it.

So it's going to be very strong for you. It's got a total gross towing weight capacity of 12,500 pounds, a maximum tongue weight, or downward pressure on your ball of 1,250 pounds. And because it does have that steel construction, it's going to help resist any bending during jackknife situations. So it should hold up well and do a good job for you.This does also have the electric reverse lockout. So with the same concept of when the momentum is causing this to condense, it will apply the brakes.

If you we're to try and reverse, that would cause your vehicle to condense this, so your brakes would theoretically be applied. That's why they have that electric lockout. So this will tap into your trailer's electrical plug so that anytime you have your vehicle in the reverse position, that is going to lock out that brake function, so you will be able to reverse without the brakes coming on in your vehicle or on your trailer.You will need to have a five pole, six pole, or seven pole trailer connector for this to operate correctly. And this will just wire right in to your trailer's wiring to allow you to have that locked out functionality.Another really nice feature about this actuator is our offset adjustable channel here. So you will have to mount your coupler in here.

You've got five different mounting options so that you can make sure that your trailer is going to be right at the perfect height for your hitch ball to make sure that everything is riding level, and you're not going to have anything out of alignment. This does have a little bit of a drop, as you can see, it's not exactly centered. So it's going to be great for your taller trailers where you might need to have that coupler set a little bit lower so that it's going to be even with your hitch ball. So lots of different adjustability there to make sure that everything is going to be lined up properly.This does also have the breakaway kit included. So you'll hook on your chain to your tow vehicle.

This is going to help in an emergency situation if your coupler we're to become disconnected from your ball. Instead of having your trailer just hopping down the road on its own, that will help to pull this lever forward, which will apply the brakes in your trailer, helping the trailer to come to a stop on its own, to make things more safe, so you don't have to worry about those emergency situations as much.You can see over here, we do have a built-in grease Zerk, that's going to help keep our handle and different components well lubricated, so very easy to keep maintained. This does have a corrosion resistant zinc plating on it to help prevent rust and corrosion, those sorts of things, so should last you a nice long time, give you lots of braking power for your trailer as you're going down the road.So that's going to complete our look for today. Again, I'm Michael with etrailer.com, thanks for watching..

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See what our Experts say about this Dexter Brake Actuator


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
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
Employee Michael B
Installed by:
Michael B

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