bing tracking image
  1. Brake Actuator
  2. Dexter
  3. Surge Brake Actuator
  4. Disc Brakes
  5. 2-5/16 Inch Ball Coupler
  6. 20000 lbs GTW
Dexter Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball - 20,000 lbs

Dexter Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball - 20,000 lbs

Item # T4750720
Our Price: $772.52
You Save: $527.47
Brake Actuator
Shipping Weight: 78 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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

Customer Photos


Need help with installation?
Locate installers near me
Surge-type actuator bolts over 3" wide trailer tongue and includes standard, heavy-duty coupler with 3" drop. Electric reverse lockout lets you back up without activating the trailer brakes. Features corrosion-resistant plating. 1-800-940-8924 to order Dexter brake actuator part number T4750720 or order online at Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball - 20,000 lbs. Brake Actuator reviews from real customers.
  • All Info
  • Reviews (13)
  • Q & A (0)
  • Photos

Dexter Brake Actuator - T4750720

  • Surge Brake Actuator
  • Disc Brakes
  • 2-5/16 Inch Ball Coupler
  • 20000 lbs GTW
  • Bolt-On
  • Electric Lockout
  • Straight Tongue Coupler
  • Dexter

Surge-type actuator bolts over 3" wide trailer tongue and includes standard, heavy-duty coupler with 3" drop. Electric reverse lockout lets you back up without activating the trailer brakes. Features corrosion-resistant plating.


  • Hydraulic actuator synchronizes trailer brakes with tow-vehicle brakes
  • Electric reverse lockout lets you back up without actuating trailer brakes
    • Built-in shield protects solenoid valve from the elements
  • Unique roller design reduces resistance during telescoping to create straight-line movement
  • Sturdy, durable steel construction resists bending in jackknife situations
  • Standard, heavy-duty coupler with built-in drop
  • Breakaway kit included
  • Zinc plating provides corrosion resistance
  • Bolt-on installation


  • Application: disc brakes
  • Ball size: 2-5/16"
  • Drop: 3"
  • Mounting: 3" wide channel tongue
  • Capacity: 20,000 lbs
  • Maximum tongue weight: 2,000 lbs
  • 1-Year warranty

When you apply the brakes in your tow vehicle, deceleration occurs and momentum pushes your trailer toward the rear of your vehicle. With surge brake systems, the actuator is triggered as your trailer moves forward while the tow vehicle slows. The actuator telescopes, applying force to its master cylinder, which in turn supplies the necessary hydraulic pressure to engage the trailer's brakes.

Electric reverse lockout with solenoid is automatically activated when the tow vehicle is shifted into reverse. To use this feature, you must have a 5-pole flat, 6-way round or 7-pole wiring harness.

068-507-20 Dexter Axle Model 20 Actuator with 2-5/16" Ball, Drop Coupler - Disc Brakes - Solenoid Lockout and Cover - Zinc

Replaces Titan 4750720

Customer Satisfaction Score:

Customer Reviews

Dexter Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball - 20,000 lbs - T4750720

Average Customer Rating:  4.5 out of 5 stars   (13 Customer Reviews)

Surge-type actuator bolts over 3" wide trailer tongue and includes standard, heavy-duty coupler with 3" drop. Electric reverse lockout lets you back up without activating the trailer brakes. Features corrosion-resistant plating.


This is exactly what wa advertised and arrived quicker than I thought, especially since it is during the holidays when shipping always takes longer.

The only reason it doesn't get 5 stars is the packaging, the actuator really needs to be packed in something more ridgid that cardboard. My actuator arrived with the 2 pins on the cylinder bracket bent (looks like it may have been dropped during shipping). I didn't contact the seller as the last one that I ordered (from another vendor) arrived the same way and for me it is easyer to repair it that return it.


Delivered fast and as promised. Some damage in shipping. a broken grease fitting and the lockout solenoid was cracked but still works.

Etrailer Expert

Jenny N.


Hey I appreciate the feedback. I will have customer service reach out to you so that we can have the zerk fitting and solenoid taken care of for you.


Actuator arrived very quickly after order via UPS. Part was as described and the online instructions and manual for installation were extremely helpful. Thanks etrailer. I will use etrailer for all my trailering needs!


The mounting tab was slightly bent in shipping so the installation was a little tough by myself. Just had to bend it back and needed four hands. The product overall is a direct replacement of the unit I am replacing so I am expecting it to function flawlessly.


Have not installed it yet but the service from etrailer is great.
They have everything you need and the expertise to get you what you need the 1st time.


I ordered the parts I needed on Monday they said it would be delivered on Thursday it was at my address on Tuesday afternoon. No shipping charge and very good service.


Very happy with both the service and pr oducts.


Product arrived quickly and as expected. Product description is right on. Fit on trailer, works and looks great.


Product was what I expected. delivered as expected.


Product appears to be in good shape even though the box was severely damaged. I have not installed it yet.


Works Great.


Speed O Light Shipping!



See what our Experts say about this Dexter Brake Actuator

  • Can the Titan Model 20 Brake Actuator be Used for Triple Axle Trailer with Disc Brakes on All Axles
    You could use the Titan actuator # T4750720 for 6 brake assemblies. You might want to switch to a larger diameter brake line though. That will help with braking power and response time. You could possibly put on brakes on the third axle as long as it has brake mounting flanges already in place. Otherwise you would have to have flanges welded on. This is a precision job that requires a special jig and someone with experience in welding on flanges. I have included a link to the right that...
    view full answer...
  • What Hardware is Needed To Install Titan Zinc-Plated Brake Actuator On Trailer Tongue
    To bolt the Titan Model 20 to your trailer tongue you want to use 2- 5/8" by 4" grade 5 bolts, nuts and lock washers. If the tongue is a light weight tongue (narrower than 3" wide) you want to use spacer tubes inside for reinforcement when bolting on the actuator. I have attached a diagram of the standard mounting bolt pattern.
    view full answer...
    Image 1 for
  • Replacement Coupler Recommendation for Titan Model 20
    How did the trailer become uncoupled? Was the latch not secured on the ball? If so then the coupler sounds like it needs to be replaced. For that we have the Titan Model 20 as part # T4750720.
    view full answer...
    Image 1 for
  • Replacement Titan Surge Brake Actuator for Boat Trailer with Tie Down Actuator
    You certainly can substitute another brand of actuator on your boat trailer to replace the Tie Down unit on it now. Titan products are built to a very high standard and one of their compatible couplers will let you get the most out of your new brakes. Click on the link provided to see our main page for surge brake actuators. Use the filters on the page to select the coupler mounting type you need (such as a-frame or straight), ball size, weight capacity and disc or drum brakes. (The 70LC...
    view full answer...
  • Replacement Master Cylinder Cap for Titan Model 20 Surge Brake Actuator Coupler T4750720
    Titan Surge Actuator # T4750720 is their model 20 and for this unit's master cylinder you will use replacement cap # T4830601. On the page I linked you will find this and all other Titan replacement parts just in case you need other items in the future.
    view full answer...
  • Replacement Inner Slide and Hitch Ball Coupler for Titan Brake Acuator T4750720
    The Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball - 20,000 lbs # T4750720 has a 1 year warranty. The Replacement Inner Slide for Titan Model 20 Brake Actuator with Drop and 2-5/16" Ball # T4490400183 is what you want to replace that cracked coupler.
    view full answer...
  • Is Lockout Solenoid Included With Titan Brake Actuator Coupler # T4750700
    The Titan Zinc-Plated Brake Actuator, part # T4750700 you referenced does not have a solenoid included. There are three types of systems you can choose from. Either a system like part # T4750700 that has no solenoid, a coupler with manual lockout, or brake couplers with an electric solenoid lockout. If you are wanting a brake coupler with an electric lockout I recommend the Titan Zinc-Plated Brake Actuator w/ Drop Electric Lockout, part # T4750720. This has the same features as the coupler...
    view full answer...
  • Will Reese Steadi-Flex Weight Distribution System Work with UFP Surge Brake Actuator A-160
    From my research the UFP A-160 actuator cannot be used with a weight distribution system so you won't be able to use the Reese Steadi-Flex, part # RP66560. In order to use any weight distribution system I recommend replacing your actuator with an updated unit like the Titan # T4750720. The Titan works with disc brakes, has a higher capacity than your UFP, and even matches the same bolt hole dimensions. Since the straight-tongue trailer you also will need a pole tongue adapter to use...
    view full answer...
  • Replacement Options for Titan Model 20 Brake Actuator for Disc Brakes
    You can replace your old Titan Model 20 with the current version of this brake actuator. If you do not need an electric lockout the correct replacement is the # T4750700. If you need an electric lockout, or would like to add it while you're redoing the trailer, then you can use the # T4750720. If you are adding electric lockout you will also need to add a 5-way to the trailer like the # HM47900 as well as the Curt Adapter # C57187 on your vehicle.
    view full answer...
  • Disc Brake Kit Recommendation for Boat Trailer with 6k Axles
    Based on what you listed as having on your trailer axle the Kodiak Disc brake kit part # K2HR526D that you listed would be the correct kit. Since you said saltwater you might be more interested in the kit that has stainless steel rotors, calipers, and mounting brackets # K2HR526DS. You'll need to swap to a disc braker compatible surge brake actuator as well though since they require higher psi ratings than drum. For that the surge brake actuator part # T4750720 would work great as it has...
    view full answer...
  • Axle Ratings and Parts Needed to Convert to Disc Brakes for Trailer with Tandem 7,000 Pound Axles
    As long as there is nothing wrong with your current axles there is no need to replace them. If your concern is because combined their capacity only equals 14,000 pounds that's not a problem because you have to keep in mind that part of the trailer's weight will be on the hitch. One of our most popular disc brake kits is the Kodiak # K2HR79E. It's for 7,000 pound axles, like yours and has a 8 on 6-1/2 bolt pattern. For the brake lines you can use # HS496-252. If you're converting to...
    view full answer...
  • Parts Needed to Convert Trailer with 7,000 Pound Axles from Drum Brakes to Hydraulic Disc Brakes
    An excellent brake kit for your 7,000 pound axles is the Kodiak # K2HR712. You'll need inner bearing # 25580 and outer # 14125A. Also seal # RG06-070. These disc brakes have a raw finish and an 8 on 6-1/2 bolt pattern. Since you have a tandem axle trailer, # T4830000 will be the brake line kit for you. If you're going to install electric over hydraulic brakes, the HydraStar # HBA16 is a what we recommend for an actuator. If your brakes will be just hydraulic disc brakes, then use...
    view full answer...
  • Recommended Coupler Lock for the Titan Model 20 Brake Actuator
    I do have an option for you but the release handle on the Titan Zinc-Plated Brake Actuator part # T4750720 is going to limit the use of some coupler locks like the MegaHitch Lock Coupler Vault Pro part # UF35-946510. Instead, I recommend the Blaylock EZ Lock Trailer Coupler Lock part # BLTL-33-40D. In order to break though this lock you would have to cut though a 3/4" thick hardened steel pin which is easier said than done. This would require power tools but if a would-be thief does have...
    view full answer...
  • Recommended Hydraulic Disc Brakes for Dexter 7,000 Pound Axles
    For the 7,000 pound Dexter axles on your 5th Wheel Camper, I recommend the Kodiak Disc Brake Kit # K2HR79E. This kit is designed for 7,000 pound axles, 16 inch and larger wheels and features an 8 on 6-1/2 inch bolt pattern. The kit includes 2 full brake assemblies (rotor-and-hub assemblies, cast iron calipers, caliper-mounting brackets and caliper-mounting bolts). You will just need to add the compatible bearings with # 25580 and # 02475 and for the grease seal # RG06-070. Then for a...
    view full answer...
  • Recommended Parts Needed To Rebuild Tri-Axle Trailer With EOH Brakes
    We have many of the components that will work for you but we do not carry axles that would be big enough to handle the heavy load you said your boat and trailer weigh. I recommend finding a dealer locally to get the right axle for your trailer and boat. When they build the axles for you they should also install brake mounting flanges and spindles to match the other items recommended below. Since you mentioned 8,000 lb axles, I will use that figure for my recommendations for the other...
    view full answer...

Do you have a question about this Brake Actuator?

Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeff D
Installed by:
Jeff D
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Manda E
Updated by:
Manda E

At 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.