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  1. Brake Actuator
  2. Dexter
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel
  6. 20000 lbs GTW
Dexter Hydraulic Brake Actuator - Drum - Primed - 5 Position Adjustable Channel - 20K
Dexter

Dexter Hydraulic Brake Actuator - Drum - Primed - 5 Position Adjustable Channel - 20K

Part Number: T4850800
$676.83
Brake Actuator
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Surge brake actuator with drop channel lets you mount a coupler attachment (sold separately) in 1 of 5 positions to fit many applications. Features a primed finish and an efficient roller design that reduces resistance. 1-800-940-8924 to order Dexter brake actuator part number T4850800 or order online at etrailer.com. Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Hydraulic Brake Actuator - Drum - Primed - 5 Position Adjustable Channel - 20K. Brake Actuator reviews from real customers.
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Dexter Brake Actuator - T4850800

Highlights

  • Handles Heavy Loads: Rated for 20,000 lbs GTW and 2,000 lbs tongue weight for big jobs.
  • Smooth Braking: Hydraulic surge design activates trailer brakes as your tow vehicle slows.
  • Fits Tall Trailers: Built-in drop and 5-position channel help keep the trailer level when towing.
  • Strong and Durable: Weld-on steel body resists bending in tight turns or jackknife situations.
  • Ready for Paint: Primed outer case with painted inner slide for long-term corrosion resistance.
  • Stops Safely if Detached: Includes breakaway kit to engage brakes automatically if separated.
Made in USA

Features to know about

Heavy-Duty Braking Power: 20,000 lbs GTW for Big Loads

Built to handle serious weight, this hydraulic surge actuator is rated for 20,000 lbs gross towing weight and 2,000 lbs maximum tongue weight. It activates your trailer’s drum brakes automatically when the tow vehicle slows down, giving consistent braking pressure without relying on electronics. Its sturdy steel housing stays rigid even in tight turns or jackknife situations, keeping braking smooth and controlled under heavy loads.

Straight-Line Movement: Roller Design Reduces Resistance

Inside the actuator, a unique roller setup keeps the inner slide moving straight with less friction. That means less binding when the actuator compresses and more reliable braking response every time you slow down. The smooth telescoping action also helps cut down on wear so your system keeps working longer with fewer adjustments.

Level Towing Made Easy: 5-Position Adjustable Drop Channel

The built-in drop channel gives you five different mounting positions for your coupler (sold separately). You can set it up for the height you need so your trailer runs level behind your tow vehicle. The lower offset design adds extra clearance for tall trailers where a standard center-mount channel wouldn’t line up right. It also works with different hitch styles like a ball coupler, lunette ring, or clevis attachment for flexible setups.

Ready to Build: Primed Finish and Weld-On Design

This actuator comes primed and ready to weld onto a straight 3" wide trailer tongue. The primed outer casing and painted inner slide make it easy to finish the way you want after installation. Once welded in place, it’s a solid, permanent setup built for farm or construction trailers that see tough use every day.

Built-In Safety: Breakaway Kit Included

A breakaway system is already built in so your trailer’s brakes activate automatically if it ever separates from the tow vehicle. It’s an extra layer of safety that helps protect your load and equipment during unexpected situations on the road or job site.

Specs

Application

  • Application: trailers with hydraulic drum brakes

Weight and Capacity

  • Gross towing weight: 20,000 lbs
  • Maximum tongue weight: 2,000 lbs

Mounting

  • Mounting: straight, 3" wide trailer tongue

Warranty

  • 1-Year warranty

Note

  • Important: Because this actuator does not include a reverse lockout, it is recommended that you equip your trailer with free-backing brakes so that you can drive in reverse without the actuator triggering your trailer's brakes.

068-374-00 Dexter Axle Model 20 Brake Actuator w/ Weld Plate and 5-Position Leveler Channel - Drum - Primed - Weld On - 20,000 lbs

Replaces Titan 4850800





Ratings & Reviews

5.0

1 reviews
5 Stars
(1)
4 Stars
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3 Stars
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2 Stars
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1 Star
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by:
Well made has function well for the last year no problems whatsoever
Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

4/25/2025

Thanks for coming back to let us know how you like the coupler after a year. What kind of trailer did you put this on, Kevin?

Kevin C. profile picture

Kevin C.

4/26/2026

Great hitch

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Info for this part was:

Employee Lindsey S
Edited by:
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Employee Wilson B
Updated by:
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Employee Hannah L
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