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  1. Brake Actuator
  2. Dexter
  3. Surge Brake Actuator
  4. Disc Brakes
  5. 2-5/16 Inch Ball Coupler
  6. 12500 lbs GTW
Dexter Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball

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

Item # T4750620
Our Price: $614.28
You Save: $149.74
Brake Actuator
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Shipping Weight: 54 lbs
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Corrosion-resistant, 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. 1-800-940-8924 to order Dexter brake actuator part number T4750620 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. Brake Actuator reviews from real customers.
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  • Reviews (18)
  • Q & A (0)
  • Photos
  • Why etrailer?

Dexter Brake Actuator - T4750620

  • Surge Brake Actuator
  • Disc Brakes
  • 2-5/16 Inch Ball Coupler
  • 12500 lbs GTW
  • Bolt-On
  • Electric Lockout
  • Straight Tongue Coupler
  • Dexter

Corrosion-resistant, 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.


  • 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 is corrosion resistant
  • Bolt-on installation


  • Application: disc brakes
  • Ball size: 2-5/16"
  • Drop: 3"
  • Mounting: 3" wide channel tongue
  • Capacity: 12,500 lbs
  • Maximum tongue weight: 1,250 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.

068-506-20 Dexter Axle Model 10 Actuator with 2-5/16" Ball, Drop Coupler - Disc Brakes - Solenoid Lockout and Cover - Zinc

Replaces Titan T4750610 and 4750620

Customer Satisfaction Score:

Customer Reviews

Dexter Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball - T4750620

Average Customer Rating:  4.2 out of 5 stars   (18 Customer Reviews)

Corrosion-resistant, 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.


Actually I am a little disappointed. In hindsight I'm not sure I received the hitch I was supposed to get. I spoke with a rep before ordering and discussed the weight of my boat 6500# and I recently noticed that hitch is rated for 6000# lbs. What model was the original order for? Also the clasp on latch is very clunky/stick and covers part of the lock hole. I had to grind it down to get lock to slide through.

Sorry about your trouble John, Ill have customer service reach out to you!
-- Etrailer Expert David B - 09/16/2022


Item could be packaged better, it did however arrive a day early. The only reason I did not give a five star review, the guard for the backup solenoid is very thin and was bent to the point of having to be removed to be straightened. I am not sure that it will be strong enough to protect the solenoid and brake line if stepped on.


This is a replacement for the same actuator that was 27 years old. This is a good value.


Perfect, just what I needed to replace my worn out old actuator


After a year of service this thing seems to work pretty good. We had a slightly different style actuator that this unit replaced, I believe the big holes lined up pretty good and the installation was straight forward. We definitely got a big boost in braking power from the other unit that was failing. Unit still looks good after a year of use.


I purchased this to because i was replace the drum brakes with disk brakes. It is an excellent actuator (as are the brakes and brake lines). The one issue I have is the thin metal shield for the backup solenoid, it has sharp edges that can cut the insulation of a wire (like the one going to the solenoid) or a child's finger. This design is clearly an afterthought by someone who is incompetent. I bent part of the shield back on itself to minimize the chance of any damage to the wire. This could be easily remedied if the manufacture would add a 1/2" and roll the metal back on itself before bending it. I guess I should be happy that the shield is there at all. I would give it 5/5 if it was not for this stupid afterthought design


Etrailer is the BEST!!!


I'm sure the product works fine, but it was too long for my available trailer mounting space. If etrailer would provide measurements along with their product information, it would have saved me the return fees and hassle. Also, packaging is terrible. It was thrown in a box with no packing, and arrived all dented up. Now I have to return it, hopefully without discussion on whose fault that is. Box arrived full of holes, and unit dinged and dented on the corners.


Product was sent very well fast delivery and it was exactly what I wanted


Thanks for the very quick and personal service. My items arrived very quickly and in good shape. Especially like the photos and summary of what was purchased as part of the confirmation/order.

I definitely recommend


Haven't towed with it yet. Loosely bolted to trailer frame. fit perfect. tin on back around solenoid was bent coming out of package but not huge deal. Won't know more until it gets some road use but so far so good.


When I got the box,,, it looked like it went around the world a few times. The metal cover around the back up lock out is bent up, but still workable.

Ill have one of our customer service folks get in touch with you shortly regarding the damage your coupler sustained.
-- Etrailer Expert Mike L - 01/30/2018


Great service, Easy to look up parts and the free shipping is awesome although a bit slow


Customer service was great! I received my parts in two days with free shipping.


Bolted right up, works great.



Look good for the price thanks



See what our Experts say about this Dexter Brake Actuator

  • Are Surge Brake Actuators Compatible with Weight Distributions Systems
    There are many weight distribution system available that are surge brake compatible, I actually attached a link to a page that will take all the systems that are compatible. The best way to pick out a weight distribution system is to base it off of the loaded tongue weight of the setup. This also needs to include the weight of any cargo behind the rear axle of the tow vehicle. Check out the link I attached that details how to determine tongue weight. Once you know your tongue weight you...
    view full answer...
  • Recommended Install Hardware Recommendation for the Titan Actuator part # T4750620
    Install bolts are not included with the Titan Actuator part # T4750620 that you referenced, you will need to get them from a local hardware store. Titan recommends you use 1/2 inch by 4 inch grade 5 or better bolts, nuts, and lock washers.
    view full answer...
  • Replacement Actuator Recommendation for TieDown Disc Actuator on Boat Trailer
    The Tiedown actuator you have is very similar to the Model 10 Titan Zinc-Plated Brake Actuator # T4750620. It's almost identical. This would be exactly what you'd need.
    view full answer...
  • Replacement Disc Brake Actuator for a Road King Boat Trailer
    I have the exact replacement brake actuator for your Road King boat trailer. For this, you are going to want to use the Titan Zinc-Plated Brake Actuator part # T4750620. This is the same actuator as you have on your trailer now and will allow for a direct bolt-on installation. The actuator has a corrosion resistant zinc plating and comes with the reverse lockout solenoid built into the unit. I have attached a review video of the actuator for you as well.
    view full answer...
    Image 1 for
  • Electric Lockout Solenoid Wiring
    The two wires coming out of the Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball # T4750620 are for the lockout solenoid as you stated. One wire will be used for the power coming from your reverse light signal and the other will ground to your trailer frame. Some of the models now come with a single wire for power on that solenoid and have a set screw underneath to attach your own ground wire to the frame.
    view full answer...
  • Recommended Disc Brake Actuator For 10,000lb Capacity Trailer
    To replace your trailer's 10,000lb disc brake actuator I recommend the Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball # T4750620. This corrosion-resistant, surge-type actuator bolts over 3" wide trailer tongue and includes standard, heavy-duty coupler with 3" drop. The electric reverse lockout lets you back up without activating the trailer brakes. We don't currently carry the mounting hardware but the included instruction manual will list the necessary...
    view full answer...
  • How To Remove Master Cylinder Cap On Titan Zinc-Plated Actuator T4750620
    On your Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball # T4750620 you will need to pop out the cylinder cover and then unscrew the cap on the master cylinder. If it is a bit tight you may need to get a pair of pliers down there to give you extra leverage, but be careful to not damage the cap. I included a video of the # T4750620 for you to take a look at.
    view full answer...
  • Where Do Reverse Lockout Solenoid Wires On Titan Surge Brake Actuator T4750620 Get Connected?
    It sure does! The two wires for the reverse lockout solenoid on the Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball # T4750620 you were looking at will be wired exactly how you mentioned. One will get grounded to the frame of the trailer, and the other will get connected to your trailer connector and then the reverse lights of your vehicle. It does not matter which wire gets connected to which, just that both do get connected. I included a video of the...
    view full answer...
  • Replacement Disc Surge Brake Actuator for 8,500 lb Boat Trailer
    Since you are above the 8,000 lb mark for the weight of your boat and trailer you would need go with the next highest capacity which would be the 12,000 lb rating like you mentioned. So for that the Titan part # T4750620 would be an excellent choice. This fits the 2-5/16 inch hitch ball, has the 12k capacity, has an electric lockout, and has a drop built into the coupler portion.
    view full answer...
  • Straight Titan Model 10 Actuator for Disc Brakes and Electric Lockout
    Yes, you can use Titan Zinc-Plated Brake Actuator # T4750820 which is straight rather than having a drop coupler. Everything else is the same: fits a 3 inch wide tongue, fits a 2-5/16 inch ball, rated for 12,500 pounds, disc brake applications.
    view full answer...
  • Replacing Master Cylinder in Titan Model 10 Actuator on Boat Trailer
    If the master cylinder you need is the part # T2374600 that would indicate that you have a Model 10 actuator like the part # T4750620. Which normally this bolts to the trailer frame. The picture you submitted doesn't quite show the coupler so I can't really tell what's going on. But you should be able to unbolt the coupler from the trailer to access the master cylinder and replace it. The two lower bolt holes that I pointed out in the picture are what hold the master cylinder to the coupler.
    view full answer...
    Image 1 for Image 2 for
  • Replacement Titan Surge Brake Actuator for Model 10 Part 3241639
    The replacement Titan actuator for your Model 10 with part number 3241639 is listed on our site as the Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout # T4750620. My contact at Titan confirmed this.
    view full answer...
    Image 1 for Image 2 for
  • Replacement Actuator For Disc Brakes On Triple Axle Boat Trailer
    The Titan Replacement Master Cylinder Assembly for Titan Model 10 and Model 20 Brake Actuators - Disc, # T4749501042 will work with disc brakes if you are looking to rebuild your actuating coupler. The Dico Master Cylinder 23744 is only compatible with drum brakes. If you are looking to replace it you will want the Titan Zinc-Plated Brake Actuator w/ Drop, Lockout Shield - Disc - 2-5/16" Ball - 12,500 lbs # T4750620 also made for disc brake application. You do want to ensure you get...
    view full answer...
  • Repair Kit for Titan Zinc-Plated Disc Brake Actuator for 2-5/16-Inch Balls Model T4750620
    Yes, the Titan Coupler and Trailer Brake Actuator Repair Kit # T1848700 will fit your 2-5/16-inch actuator model # T4750620 and all other Titan couplers and actuators that specifically fit a 2-5/16-inch hitch ball.
    view full answer...
  • Replacement Master Cylinder Assembly for Titan Actuator Coupler for Disc Brakes
    The Titan Actuator you referenced, part # T4750620, is their model 10 actuator which uses replacement master cylinder # T2374600. Their model 60 actuator uses replacement master cylinder assembly # T4820000.
    view full answer...
  • Replacement Orifice Fitting and Cap for a Titan Model 10 Actuator
    Sounds like you need the orifice fitting gasket part # T0774500 and the replacement cap part # T4830601 for your Titan Model 10 actuator.
    view full answer...
  • Can You Back Up With Titan Hydraulic Actuator Without Reverse Lockout
    That's a good question and in order to reverse with the Titan Zinc-Plated Brake Actuator w/ Drop - Disc - 2-5/16" Ball - Bolt On - 12,500 lbs # T4750600 you will need to add a reverse lockout, which is the Solenoid Valve for Titan Brake Actuators # T4748800. The other option is to use the same actuator that does come with an electric lockout, the Titan Zinc-Plated Brake Actuator w/ Drop, Electric Lockout - Disc - 2-5/16" Ball - 12,500 lbs # T4750620. I have added links to video reviews...
    view full answer...
  • Replacement Surge Brake Actuator To Replace Tie Down Model 125 12,500LB Drop Actuator
    I recommend the Dexter Zinc-Plated Model 10 Brake Actuator w/ Drop to replace your current Tie Down actuator. You will need either the Disc Brake Actuator # T4750620 or Drum Brake Actuator # T2478100. These both have a similar design as your current actuator with a drop coupler attaching to a 2-5/16" hitch ball. The Drum Brake Actuator # T2478100 does not include a Electric Reverse Lockout # T4748800 but you are able to add one if needed.
    view full answer...
  • Recommendation for Bleeding Hydraulic Brake Lines On Trailer Disc Brakes
    I recommend using the Hand Vacuum Pump Brake Bleeder # PTW87030 for bleeding the lines on your system with new actuator and calipers. This allows you to pull fluid through the lines and caliper to ensure there is no air and only fluid in the system. I use this system every time I bleed lines because it makes it easy for one person to do it.
    view full answer...
  • Electric Winch and Surge Actuator Recommendation for Trailer Towing 9,500 lb Boat
    When it comes to choosing a winch for a boat trailer, there are a few general rules we can use. The boat-size-to-winch capacity is generally 2 to 1. With good rollers and short winching distances, the ratio can increase to 3 to 1 and with wooden bunks and long winching distances, you will want to reduce the capacity to 1 to 1. For an electric winch that would work well for you the ComeUp winch part # CU644501 would work well. This has a 4,500 lb capacity and a 50 foot long synthetic rope. For...
    view full answer...
  • Will Brake Mounting Flanges be Installed on New Axle
    Whether the axles have the brake mount flanges on them will depend on what you purchased. However, since they're 6,000 pound axles it's fairly likely the flanges will be there. If not, we carry # 4-44-1 for 6,000 pound axles. It will need to be welded to the axle at a trailer shop because it needs to be perfectly square and concentric. As long as your current brake actuator is for disc brakes and functioning properly there's no need to replace it. However, if you previously had drum...
    view full answer...
  • Parts to Replace Hydraulic Brake System on a 2004 Magic Tilt Trailer
    We can definitely get you started with parts for your Magic Tilt Trailer, but we will need some additional information to complete your parts list. We can start with a coupler. Since your boat trailer will not exceed 10,260 lbs, I recommend looking at a coupler like the Titan Zinc-Plated Brake Actuator for Disc Brakes, # T4750620. This coupler has a 3 inch drop like the coupler you referenced, but it has a 12,500 lb weight capacity which is closer to the weight of your trailer. Using...
    view full answer...
    Image 1 for Image 2 for
  • Installing and Bleeding New Hydraulic Brakes Lines on Trailer With Titan Actuator
    I can help you install new hydraulic brake lines on the trailer. The Titan Zinc-Plated Actuator part # T4750620 is a surge brake actuator so you need hydraulic brake lines. The kit you need depends on how long the trailer is that you are installing the lines in and how many axles the trailer has. The HydraStar Hydraulic Brake Line Kit part # HS496-252 is for a 25 foot tandem axle trailer. To install the lines you want to drill a hole near where the Titan Coupler installs so that you can...
    view full answer...
  • Replacement Surge Brake Parts for 2004 5 Starr Boat Trailer
    It sounds like you have a Demco Actuator to me like # DM8104002. We also have one with a 4 inch drop # DM8104311. Both are Hydraulic Brake Actuators that are rated at 12,500lbs.,has a 2-5/16 inch ball, and bear the DA10 model number. I was able to look up your boat trailer and the parts used between packages varied. I can help you pick out Rotors, Lines, Calipers, and Pads if you can provide me with more information about the current items on the trailer. I will need the number of...
    view full answer...

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