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  1. Brake Actuator
  2. Dexter
  3. Surge Brake Actuator
  4. Drum Brakes
  5. 2-5/16 Inch Ball Coupler
  6. 8000 lbs GTW
Dexter Zinc-Plated Brake Actuator - Drum - 2-5/16" Ball - Bolt On - 8,000 lbs

Dexter Zinc-Plated Brake Actuator - Drum - 2-5/16" Ball - Bolt On - 8,000 lbs

Item # T4079200
Our Price: $479.87
You Save: $47.97
Brake Actuator
Shipping Weight: 29 lbs
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Surge-type actuator is zinc plated for increased corrosion resistance and comes with integrated, heavy-duty coupler. Unique roller design helps reduce resistance. For use with drum brakes. 1-800-940-8924 to order Dexter brake actuator part number T4079200 or order online at Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Zinc-Plated Brake Actuator - Drum - 2-5/16" Ball - Bolt On - 8,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (53)
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Dexter Brake Actuator - T4079200

  • Surge Brake Actuator
  • Drum Brakes
  • 2-5/16 Inch Ball Coupler
  • 8000 lbs GTW
  • Bolt-On
  • No Lockout
  • Straight Tongue Coupler
  • Dexter

Surge-type actuator is zinc plated for increased corrosion resistance and comes with integrated, heavy-duty coupler. Unique roller design helps reduce resistance. For use with drum brakes.


  • Hydraulic actuator synchronizes trailer brakes with tow-vehicle brakes
  • 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
  • Breakaway kit included
  • Zinc plating provides corrosion resistance
  • Bolt-on installation


  • Application: hydraulic drum brakes
  • Ball size: 2-5/16"
  • Mounting: 3" wide channel tongue
  • Capacity: 8,000 lbs
  • Maximum tongue weight: 800 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.

Because this model 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 triggering your trailer's brakes.

068-122-00 Dexter Axle Model 6 Actuator with 2-5/16" Ball Coupler - Drum Brakes - Zinc

Replaces Titan 4079200

Customer Satisfaction Score:

Customer Reviews

Dexter Zinc-Plated Brake Actuator - Drum - 2-5/16" Ball - Bolt On - 8,000 lbs - T4079200

Average Customer Rating:  4.5 out of 5 stars   (53 Customer Reviews)

Surge-type actuator is zinc plated for increased corrosion resistance and comes with integrated, heavy-duty coupler. Unique roller design helps reduce resistance. For use with drum brakes.


After 36,000 miles on my boat trailer, my previous Dexter Brake Actuator was looking pretty worn. A replacement was needed. Easy to install - just two bolts, filling the brake fluid reservoir and connecting the brake line.


Product is exactly as advertised. The team kept me well informed of delivery. Definately recommend shopping at etrailer!


I regret buying this brake actuator for my boat trailer. This is the exact same actuator that was on the trailer when I got it, but the original was 25 years old and neglected. I decided to buy a new actuator, same as original and also replace the brake lines, baking plate and I even got the drums turned.

Well I go to fill the master cylinder up with brake fluid, open the bleeder screw and try to bleed this unit. It is the most difficult process. This is the absolute worst choice in hydraulic brake actuators for drum brakes on a boat trailer. The ONLY way you can actuate the brakes is to either use a long fulcrum (long piece of angle iron) or chock the wheels and hook it to your truck and back up. This is extremely difficult, cumbersome and just plain antiquated with today's technology. This actuator could certainly be updated with modern design/engineering and make this process much easier.


Etrailer Expert

Sierra K.


If you use a longer 2 by 4 it is much easier to get leverage to move the coupler. Another way that you can bleed the brakes more efficiently is with a Hand Vacuum Pump Brake Bleeder item # PTW87030.


Product looks great, heavy-duty and ready for install! Would have given 5-Star if the shipping boxes weren't damaged.


It is a little hard to get connected. Requires driving forward and turning some to get the latch to shut. I feel confidant that it is not going to come loose while I am driving.


hello: I am restoring an older boat trailer. I needed a new surge brake assembly. After looking around for days, I came across your website. It was the easiest site to use with great pictures and all the information needed to make my decision in one place. ordering was just as easy. Free delivery and great prices will bring me back


The customer service was excellent! The replacement winch strap I had originally ordered was backordered for months. ETrailor quickly notified me and offered several other options. I chose one of those options and the order was filled and shipped with only a few hours delay. The complete order arrived within a few days, well protected in a heavy duty box, and as described and expected. They are perfect replacements for my old worn out parts. Thanks!


Ordered on Sunday early afternoon and received a notice that same day in late afternoon that the brake actuator had shipped. Don’t see that too often. Item was delivered in a few days and tracking the item was detailed. Brake actuator was a perfect fit in replacing an old worn out titan model 6 7500 lb with a titan 8000 lb. Easy to change out. Took maybe 20 min. Great service.


Ordered my trailer hitch come in right
time bolted on my trailer worked perfect.. Always have good luck ordering


Very sturdy construction, latch works easily, and actuator woks very smoothly. Would definitely recommend!


The brake actuator fits perfectly on my Trail-rite boat trailer. Looks nice also. Will try it on the road next week.


The brake actuator is fine but we were really pleased with the service. The person that took the order was knowledgeable and the order was processed fast and received in no time at all...we will do business with this company again.. Thanks


Just installed my new 8,000LB surge tongue, shipping was fast and installation was easy, great product and works just like its suppose to, would be nice if it had a reverse lock out but because of its design it was easy to make my own lock out.


Very happy with the product so far. It looks to bolt up replacing the old hitch that was on the trailer. I have not had a chance to install T4079200 but I will update after I install...


Exactly what I needed couldn't find it anywhere else except your online store thank you so much. When you stuck on side of road with broken trailer u need it fixed fast. Thanks so much for the fast delivery


Purchase experience was as good as i have ever had on any product. items delivered as scheduled. Both items exactly what was ordered. Even return process was easy (my error on one item) and correct item delivered right away. Communication with vendor was excellent. Product descriptions on website accurate which made ordering a cinch. I highly recommend this vendor for any trailer parts needs.


The actuator and hitch were received very quickly and look to be exactly what I needed for repair and restoration on a 24.1 Mako. Very well packaged and at the right price.


my third Titan Model 6......seems like a new and improved version of the older ones!

Ordered it, they shipped it, all in a few days and arrived in great shape!

Thanks again,



Nice kit easy to install from opening the box to installed 15 minutes


It took me 5 minutes to put the new coupler on the old trailer. I towed it today and all is well. Thank you...


Works great great price


Price was right, shipping...A++


I sometimes struggle with the coupler, could just be me. Otherwise everything else about it works good. Super easy to install


Worked great right out of the box. Easy to install and bleed. No problems so far.


work great-just what i needed

Show More Reviews

See what our Experts say about this Dexter Brake Actuator

  • Is the Titan Zinc-Plated Brake Actuator T4079200 Suitable for Boat Trailers
    Yes, the Titan Zinc-Plated Brake Actuator part # T4079200 can be used on a boat trailer. In fact, these actuators are actually designed specifically for boat trailers which is why they have a zinc plating so you don't have to worry about about rust/corrosion that is associated with launching a trailer in water frequently. In regards to being submerged, I don't see any issue with this but you don't want the actuator submerged for an extended period of time. If you are just referring to submerging...
    view full answer...
  • Is 8,000 Pound Titan Brake Actuator Sufficient for Trailer with 7,900 Pound GVWR
    The Titan Zinc-Plated Brake Actuator # T4079200 referenced in your question has a weight capacity of 8,000 pounds, so it is rated appropriately and will work well for your trailer that features a GVWR of 7,900 pounds. Also keep in mind that the GVWR refers to the most the trailer can possibly weigh when it's fully loaded. It is unlikely that you will actually load the trailer up to this limit. I have attached a short video demonstration on this actuator that you can also check out.
    view full answer...
  • How Long of Frame Channel is Needed to Install Titan Model 6 Actuator
    The mounting flange length of the Titan Model 6 actuators is 9-1/2 inches and the additional length the master cylinder adds to that is 6 inches so you'd want to have around 16 inches of frame channel to install a Titan Model 6 actuator like the part # T4079200 that you referenced.
    view full answer...
  • How to Reset Breakaway Lever on Titan Model 6 Zinc-Plated Brake Actuator T4079200
    On a Titan model 6 actuator like # T4079200 the breakaway reset procedures is as follows: When the break-away lever is engaged, it is in the vertical position. It must be reset before the trailer is moved. First, carefully loosen the pressure line fitting to the master cylinder to relieve hydraulic pressure. Then remove the four bolts that secure the master cylinder assembly to the outer case. The flat front tab of the “U” shaped break-away spring can then be placed in the top notch...
    view full answer...
  • Overall Length of the Titan Model 6 actuator # T4079200
    The overall length of the Titan Model 6 actuator # T4079200 is right at 24 inches. I attached a review video for more info on the actuator as well.
    view full answer...
    Image 1 for
  • Regular Trailer Coupler to Replace Titan Model 6 Actuator T4079200
    To replace your Titan actuator # T4079200 with a standard coupler that will bolt on in its place you can use Titan coupler # T4853100. It also fits a 3 inch wide tongue and has the same bolt pattern. I have included a link to a video review of this coupler for you.
    view full answer...
  • Can a Surge Brake Actuator be Installed on a Swing Away Trailer Tongue?
    As long as a flexible line is used from the back of the actuator to the point where a T fitting will split the lines to the brakes, there will be no issue using the Titan Zinc-Plated Brake Actuator w/ Electric Lockout - Disc # T4747220 with a swing away tongue.
    view full answer...
  • Replacement Master Cylinder Cap for Titan Model 6 Actuator
    The Titan Zinc-Plated Brake Actuator # T4079200 is a Model 6 and the replacement cap for the master cylinder is part # T1755600.
    view full answer...
  • Recommended Replacement Actuator for a TDE Model LP8000 Class lV Actuator
    We have a couple of options for replacing your TDE model LP8500 actuator. The Titan Zinc-Plated Brake Actuator item # T4079200, you were looking at, will work great if you have drum brakes. If you have disk brakes you will need item # T4747220. These actuators have a slightly lower capacity at 8,000 lbs but this will still be sufficient on your Mastercraft X46 trailer.
    view full answer...
  • Surge Brake Actuator Coupler Replacement Recommendation for Global Direct Component GDC-80
    Info on your coupler is harder to find but it looks like your coupler is a 8,000 lb rated surge brake actuator. Which for that we have the Titan kit part # T4747220 that is a disc brake actuator designed for disc brake use. Or we have the part # T4079200 which is similar but for drum brakes.
    view full answer...
  • Is Mounting Hole Spacing The Same On T4079200 And T4853100 Trailer Couplers
    The mounting hole pattern is different on the # T4853100 coupler versus the pattern on the # T4079200 coupler. As you can see in the attached photos the bolt pattern is closer together on the side of the # T4079200 coupler than on the # T4853100. You may wind up with some of the mounting holes in the same place but you will need to drill new holes for some if not all of the holes. I have attached a link to a helpful article that explains what is needed to add electric drum brakes to...
    view full answer...
    Image 1 for Image 2 for
  • Does Titan Model 6 Actuator Need Reverse Lock Out Solenoid
    If you want to be able to back your trailer up without the brakes applying you will need the lock out solenoid part # T4748800 with your actuator part # T4079200. Otherwise your brakes will lock up every time your trailer gets reversed.
    view full answer...
  • Recommended Replacement Actuator for GDC-80
    We've got some nice options to replace the GDC-80 actuator you've got that will bolt up to a 3 inch channel tongue. I recommend using the Titan Zinc-Plated Brake Actuator - Disc # T4747200 (for disc brakes) or the Titan Zinc-Plated Brake Actuator - Drum # T4079200 (for drum brakes), which both have 8000-lbs capacities and fit 2-5/16" hitch balls, so they're the same specs as your GDC-80.
    view full answer...
  • Replacement Master Cylinder Recommendation for Titan Model 6 Drum Actuator T4079200
    What would be the easiest solution would be to just replace the master cylinder of the part # T4079200. For that you would want the master cylinder part # T1777401.
    view full answer...
  • Recommended Brake Actuator For Drum/Disc Brakes
    The Titan Zinc-Plated Brake Actuator w/ Electric Lockout - Disc - 2-5/16 inch Ball - 12,500 pounds # T4750820 will only work with disc brakes and the Titan Zinc-Plated Brake Actuator - Drum - 2-5/16 inch Ball - Bolt On - 8,000 pounds # T4079200 will only work with drum brakes. Both actuators have a sturdy, durable steel construction that resists bending in jackknife situations. These also have a zinc plating that is corrosion resistant and has a bolt on installation for 3 inch wide channel...
    view full answer...
  • Availability of Surge Brake Actuator Designed for 2-5/16 inch Hitch Ball
    We don't carry the Tiedown brand of actuators but we do have surge brake couplers that are designed for 2-5/16 inch hitch balls like the # T4079200 which is designed for drum brakes or we have the part # T4750820 which is designed for disc brakes. I also attached a link below that has all of the surge brake actuators we carry that are designed for 2-5/16 inch balls.
    view full answer...
  • Replacement Titan Brake Actuator for Titan 3241639
    We've checked the part number you gave us before and the replacement for it is the part # T4750820 which is for disc brakes. This one does come with a reverse lock out solenoid. If it has rust all over it I'd consider just replacing the entire thing and starting over with everything new. If you can get me the capacity of your axles and the bolt patterns I can help you pick out stainless steel brake components that won't rust as well.
    view full answer...
  • Are Titan Disc Brake Actuators Compatible with Demco Brakes and Brake Lines
    Yes, the Titan actuators like the # T4339720 are perfectly compatible with Demco and other brands of brake assemblies and brake lines. Thankfully all of the setups are designed for the same pressure ratings so they all easily interchange with each other.
    view full answer...
  • Why Are Some Trailer Couplers Rated Near 8,000 lbs Available for 2 inch and 2-5/16 inch Hitch Balls
    Typically the larger hitch balls are used in the higher capacity applications, but there is a bit of overlap between the capacities of the 2 inch and 2-5/16 inch hitch balls which is right in the weight capacity range of the two actuators you mentioned. Around 8,000 lbs is where both sizes of hitch balls mentioned are easily within capacity. Above that is when you get into the larger hitch ball size-only territory.
    view full answer...
  • What Brake Actuator Replaces The TDE Model LP8000 Class IV Actuator
    I do have a solution for your you. The replacement brake actuator that you need is either the Titan Zinc-Plated Brake Actuator w/ Electric Lockout - Disc - 2-5/16" Ball - 8,000 lbs, part # T4747220, which will work if your trailer has disc brakes or the Titan Zinc-Plated Brake Actuator - Drum - 2-5/16" Ball - Bolt On - 8,000 lbs, part # T4079200, which works for trailers with drum brakes. I have included product description links and video demo links below.
    view full answer...
  • Hydraulic Surge Brake With Manual Lockout Feature
    For a hydraulic trailer brake actuator, designed for a 2” ball coupler and trailer drum brakes, that has a reverse lockout feature that is not electric, you can use the Titan # T63FR Actuator with manual lockout feature. This brake is bolt on style, works on a 3” wide channel tongue and is rated for 7500 pounds towing capacity, and 750 pounds of tongue weight. If you need a brake to work with a different size coupler ball, or disc brakes, or other feature, just email me back for a revised...
    view full answer...
  • 8k Disc Brake Surge Actuator Recommendation
    It sounds like you have a # T4079200 and are looking to convert it so that it will be compatible with disc brakes. If you were using a single axle trailer you could simply ram a screw driver through the back of the check valve in the master cylinder so that the actuator would have higher pressure like what disc brakes require, but since you have a tandem axle trailer this setup would not give you enough fluid displacement to activate your brake assemblies. You will have to upgrade to the...
    view full answer...
  • Replacement Cap and Breakaway Lever for a Titan Model 6 Actuator
    For a replacement cap for the Titan Model 6 actuator you would want the part # T1755600. For the replacement lever you would want the part # T4594100.
    view full answer...
  • Can the Check Valve on a Titan Drum Brake Actuator be Removed for Use with Disc Brakes
    Technically, the check valve on the drum actuator, # T4079200, can be removed. However, it is not recommended to do so because you could end up damaging the master cylinder. It would be best to go with the appropriate actuator, # T4747200. You could also replace the master cylinder in the drum brake actuator using the disc brake master cylinder # T1777405.
    view full answer...

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Info for this part was:

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