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  1. Brake Actuator
  2. Dexter
  3. Surge Brake Actuator
  4. Drum Brakes
  5. 1-7/8 Inch Ball Coupler
  6. 2 Inch Ball Coupler
Dexter Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7,000 lbs

Dexter Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7,000 lbs

Item # T43397007K
Our Price: $319.94
Brake Actuator
This item qualifies for Free Shipping
Shipping Weight: 20 lbs
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Easy and convenient turn-wheel latch lets you fit the coupler on this corrosion-resistant, surge-type actuator to a hitch ball measuring 1-7/8", 2" or 50 mm. Designed for use with drum trailer brakes. 1-833-496-1390 to order Dexter brake actuator part number T43397007K or order online at Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (69)
  • Q & A (0)
  • Photos
  • Why etrailer?

Dexter Brake Actuator - T43397007K

  • Surge Brake Actuator
  • Drum Brakes
  • 1-7/8 Inch Ball Coupler
  • 2 Inch Ball Coupler
  • 7000 lbs GTW
  • Bolt-On
  • No Lockout
  • Straight Tongue Coupler
  • Dexter

Easy and convenient turn-wheel latch lets you fit the coupler on this corrosion-resistant, surge-type actuator to a hitch ball measuring 1-7/8", 2" or 50 mm. Designed for use with drum trailer brakes.


  • Hydraulic actuator synchronizes trailer brakes with tow-vehicle brakes
  • Easily adjustable to fit 1-7/8", 2" and 50-mm balls
    • Turn handwheel to tighten coupler around ball
  • Breakaway kit included
  • Zinc plating provides corrosion resistance
  • Durable steel construction
  • Bolt-on installation
    • Bolt holes 3" apart on center
    • Mounting hardware not included
  • Made in USA


  • Application: hydraulic drum brakes
  • Ball size: 1-7/8", 2" or 50 mm
    • Some adjustment may be required
  • Mounting: 3" wide channel tongue
  • Capacity: 7,000 lbs
  • Maximum tongue weight: 700 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.

068-139-01 Dexter Axle Model 60 ZX7000 Multi-Fit Actuator for Drum Brakes - Zinc

Replaces Titan T4339700 and 43397007K

Customer Satisfaction Score:

Customer Reviews

Dexter Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7,000 lbs - T43397007K

Average Customer Rating:  4.5 out of 5 stars   (69 Customer Reviews)

Easy and convenient turn-wheel latch lets you fit the coupler on this corrosion-resistant, surge-type actuator to a hitch ball measuring 1-7/8", 2" or 50 mm. Designed for use with drum trailer brakes.


Not a fan because of the screw down and up for ball attachment. Unit Itself works great.


Direct Bolt on, better than welding. Surge Brake Line connected just fine. Bled Brakes. Test drive was successful. What more could you ask for. I chose the hand tightening knob over the Lever because it was more assuring to me that it was tight on the ball and the locking mechanism has never failed. I have used Titan surge actuators for 40 years. I am using this actuator on a 4,000 lbs. boat and trailer. On my way to the lake!


Very easy to install, I took the old unit off and had the new one installed in less than an hour. I hooked the trailer to my truck and primed the Hydraulic cylinder before I attached the brake line. No problems.


Seems to be what I needed to have replaced, was easy to install. Only problem, NO instructions. I did find video suggestions online.


Arrived corroded and not functioning properly. I had to disassemble and clean the rust that was on the inside of the fluid reservoir and the piston. I would have sent back but I needed it at the time. The piston was frozen. It took some time for me to figure this out.


The part was a perfect fit and the service was prompt and friendly. I had a question and the person on live chat was friendly and helpful. I would definitely use etrailer again


The master cylinder leaks around the ca p.

You mentioned that the master cylinder is leaking around the cap. I suggest replacing the cap and we do have it available. It is part # T4480701
Replacement Master Cylinder Filler Cap for Dexter Model 60 and Aero 7500 Actuators
on our site.
-- Etrailer Expert Jenny N - 05/02/2022


Perfect replacement. Easy to install.


DO NOT...I REPEAT DO NOT BUY THIS PIECE OF JUNK (I have stronger words but you get the idea) You get this piece of junk and ZERO info. I'm going to stop reviewing now before I go off the deep end!


Looks great ! But a Little high priced


Fast and correct part.


It mounted in the same holes my old unit was removed from great fit.


Bolted right onto the trailer. No instructions and the link on the web sit didn't work but what do you need for two bolts. Wouldn't have minded some guidance with bleeding the brakes but got it done anyway.
Greatly improved the towing of my boat trailer!
Good price. Shipping good. What else would you want!?

Well, it worked great till I sold the boat last October. Shocked about the follow-up! Wow
Paul P - 06/07/2016


Perfect replacement for my existing brake. I'm using this brake coupled with the Titan actuator W/reverse lockout solenoid since there is no manual lockout and I don't have free backing brakes.


Ordered for item repair at our plant. Ordering was easy and shipping was good.


Great product works great on my boat trailer


This product perfectly replaced my tongue master cylinder on my 1992 Capri boat trailer. It bolted right up and the brake line thread was the same. It was super easy. It is a huge improvement!


Excellent product. This was almost an exact replacement for the original one that was on my boat trailer. I had the boat out about once a week this summer and the actuator worked perfectly. Braking was smooth and it locks down easily on the hitch ball. I highly recommend this actuator.


Fast delivery & looks like the right brake actuator will install later this spring boat in storage. Very good service will recommend my friends to your company. Thanks for your help David Castle

Its working great replaced my 26 year old brake actuator
Dave C - 02/12/2016


good stuff, nice product, shipped fast, exact fit / this is just what I wanted I had questions called and asked and got answers / the price couldn't be beat I tried other on line and local stores / am a happy camper I would buy here again.
George O


I cannot say enough about etrailer!! I ordered my part at a much cheaper price than I would have paid locally, it was mailed the same day and I got it three days later!! When ordering, I spoke to Shawn who was very professional and very precise in my wishes......she made me feel like a very valuable customer!! The part arrived in perfect shape and was easy to install. I would not hesitate to order from etrailer again!! Keep up the good work!!


Just as shown online product fit perfect great to see a company that has great service and low prices. I will buy again when I need something. Brake actuator looks exactly like my old one saved a lot of time and money.


Wow.. I’m impressed!! Super fast shipping and pro packaging.. hitch exactly as described! Thank you and yes, I’ll be back


Nice part. Easy installation.


Thank you guys at e trailer, great service, good prices and was a pleasure doing business. Will definitely shop here again for all my trailer needs.

Show More Reviews

See what our Experts say about this Dexter Brake Actuator

  • Will the Titan Zinc-Plated Brake Actuator # T43397007K Activate 4 Brake Assemblies
    Yes, as long as the brake assemblies on your trailer are drum brakes the Titan Zinc-Plated Brake Actuator # T43397007K will work activate 4 brake assemblies. I attached a review video for this actuator for you to check out as well.
    view full answer...
  • Testing A Hydraulic Coupler and Bleeding a Hydraulic Brake System
    We have a video that shows how to bleed a brake system, click on the link provided. You will need a helper, a length of rubber tubing that will fit onto the bleeder valve and a clear plastic or glass bottle. I prefer a glass bottle because it is easier to see through glass. Start with the brake furthest from the actuator, and open the bleeder screw and allow it to remain open while your helper pumps the actuator until you see brake fluid free of air bubbles coming out of the bleeder screw....
    view full answer...
  • Does a Hydraulic Trailer Brake Actuator Have to be Primed for Use
    The brake actuator, # T43397007K, does not have to be primed. After you have replaced the parts needed and reconnected the brake lines, you will fill the reservoir with DOT 3 brake fluid, leave the cap off, and proceed to bleed the brakes. I have included a link to a video that shows how to bleed the brakes manually. I have also included a link to the replacement actuator parts and a link to wheel cylinders we carry.
    view full answer...
  • How to Bleed Hydraulic Surge Trailer Brakes
    There are a couple of ways you can bleed a trailer brake system. Titan offers the following instructions, which I have also linked for you, on bleeding the brakes: Remove the master cylinder cap and fill the reservoir to three quarters full with DOT-3 brake fluid. DO NOT allow brake fluid to contact painted surfaces since it will damage the finish. Wipe up any spills immediately and wash the area with water. If you choose to manually bleed the system, an assistant makes the job easier....
    view full answer...
  • Compatibility of Titan Hydraulic Actuating Coupler on Military Trailer with Automotive Drum Brakes
    If your military trailer has a 3 inch channel tongue, and its Gross Load (trailer plus weight of its contents) does not exceed 7000 lbs, the Titan # T43397007K would indeed work with the automotive-style drum brake system on your trailer.
    view full answer...
  • What Size and Grade Bolts Should be Used to Install Titan Model 60 Brake Actuator
    The Titan brake actuator # T43397007K will take 1/2 inch by 4 inch grade 5 bolts, nuts, and lock washers. Since this is a boat trailer if you can find some grade 5 zinc coated or stainless steel they will have better corrosion resistance. I have linked a video review and the installation instructions for this actuator for you.
    view full answer...
  • How Many Drum Brakes Assemblies Can be Operated by Titan Zinc-Plated 7K Brake Actuator
    The Titan Zinc-Plated 7K Brake Actuator # T43397007K that you referenced can handle the four hydraulic drum brake assemblies on your tandem axle trailer. This bolt-on actuator includes an electric reverse lockout solenoid (and a solenoid shield to protect it) as well as a built-in breakaway kit. It will fit 3-inch wide trailer tongues and has a multi-fit coupler to allow use with three sizes of hitch ball, 1-7/8-inch, 2-inch and 50 millimeter. I have included a review video to help illustrate...
    view full answer...
  • How to Pump Master Cylinder on Surge Coupler to Allow Bleeding Hydraulic Drum Trailer Brakes
    A surge coupler for actuating hydraulic drum brakes, such as Titan # T43397007K, can be pumped for purposes of bleeding the brake lines by using a 2 x 4 or similar piece of lumber to compress the coupler. The linked photo shows the general arrangement for doing this, which includes using the trailer safety chains for leverage. The complete instructions for Titan coupler # T43397007K are linked and these include a detailed procedure for bleeding the system using this wood-with-chains method.
    view full answer...
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  • How to Pick out a Surge Brake Actuator for a M105 Military Trailer
    That really depends on the weight of the trailer plus the weight of any cargo you plan on putting in that trailer. I would recommend you check out the link I attached to the right that shows all of the Titan actuators we carry, select the weight capacity you need from the facets on the left and then select any of the couplers listed and you should be good. I also attached an FAQ article on adding hydraulic drum brakes to a trailer, as well as an article on adding hydraulic disc brakes...
    view full answer...
  • What Parts Are Needed To Add hydraulic Brakes To Boat Trailer For 2002 Skeeter Bass Boat
    In order to add brakes to your trailer for your 2002 Skeeter Bass Boat, we will need to know what your trailer currently has. You will need to know the axle weight capacity. There is normally a plate or sticker on the axle that lists the weight capacity. If you are unable to find that, you can get the numbers from the bearing and seal to determine what size axle you have. I have attached a photo that shows where you can typically find the bearing and seal numbers. I have attached a helpful...
    view full answer...
  • Troubleshooting Hubs and Drums Heating Up on Boat Trailer
    A bad shock/damper and over adjusted brakes could be the cause of your problem. However, I would start off by checking to make sure that the spindle nut wasn't tightened down too tightly after replacing the bearings and seals. You should tighten the spindle nut until it is tight and then back it off one 1/4 turn. If this doesn't correct your problem, you could try backing off of the pad adjustment to see if this will help.
    view full answer...
  • Installation Instructions for the Titan Zinc-Plated Brake Actuator # T43397007K
    I attached a link to the right that contains detailed installation instructions for the Titan Zinc-Plated Brake Actuator # T43397007K that you can use as a guide to install this coupler on your 1994 Maxum 20 foot boat trailer.
    view full answer...
  • Will Titan Zinc-Plated Brake Actuator # T43397007K on a 4 Inch Long Tongue 3 Inches Wide
    The mounting hole spacing for Titan Zinc-Plated Brake Actuator # T43397007K is 3 inches on center. Since you have 4 inches it will work! I have included a link to a video review of this product for you.
    view full answer...
  • Recommended Replacement Actuator For Fulton A50 On 2007 EZ Loader Trailer
    My contact at Fulton confirmed that the A50 series is now obsolete and they don't make replacement parts. For a replacement, I recomemend the Titan Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7K # T43397007K. This surge brake actuator will help make your 2007 EZ Loader Trailer functional again.
    view full answer...
  • How to Properly Bleed Trailer Brakes
    We have exactly what you are looking for. I have attached a detailed demonstration video on bleeding the brakes on a trailer for you to check out. As a general summary, you will first top of the master cylinder with appropriate fluid. To pump the fluid from the master cylinder, you can unbolt the plate that holds the lever into place and then use the lever to actuate the master cylinder and force the fluid through. Next you will find the bleeder valve and open it. Take a rubber hose,...
    view full answer...
  • Master Cylinder is Not Pumping Fluid
    If your actuator, like part # T43397007K, is new and you are testing the master cylinder without it being in the fully assembled actuator then that would be your problem. If your actuator is not new then you will want to look for any clogs in the brake line. There should be fluid moving through the line even with it being disconnected from the brakes. Try cleaning the brake line and if that doesn't help let me know and I can help you to troubleshoot further.
    view full answer...
  • Replacement Surge Brake Actuator For 1979 Rolco Boat Trailer
    It sounds like you need to replace the brake actuator on your 1979 Rolco trailer. When you say the hitch portion are you asking about a surge brake coupler on the trailer? These were used a lot on trailers from that time. I have attached a link to our product page for the surge couplers we offer. As you can see on the page, choosing the right coupler will depend on the size hitch ball you use and also the trailer tongue channel size. Also, the couplers have a weight capacity and vary by...
    view full answer...
  • Tie Down Model 66 Surge Brake Coupler Replacement
    Your Tie Down Model 66 can easily be replaced by one of our actuators. The Titan part # T43397007K would be a great drum brake option that has a 7,000 lb capacity and can fit 2 inch or 1-7/8 inch hitch balls.
    view full answer...
    Image 1 for
  • How to Bleed Air from Titan Zinc-Plated Brake Actuator
    On the Titan Zinc-Plated Brake Actuator # T43397007K you can get access to the plunger for purposes of bleeding the system of air by removing the plate that surrounds the breakaway lever and by removing the front plate with the logo. You can then manually push the lever to pressurize the system and bleed out any air in the lines. It is also possible to bleed the brakes by using a 2x4 piece of lumber as a lever to compress the actuator to apply pressure to the system.` You may care to...
    view full answer...
  • Will Titan Brake Actuator part # T43397007K Replace a Tie Down 70E Actuator
    Yes, the Titan brake actuator part # T4339720 that you referenced will easily replace the Tie Down actuator you have now. The fitting size is the same. I attached a review video for this actuator for you to check out as well.
    view full answer...
  • Can Reverse Lock Out Solenoid be Left On Titan Model 60 If Never Needed
    If you never plan to use the reverse lock out solenoid that comes with some of the Titan Model 60 actuators you could remove it if you wanted to, but if you never wired it up you could just leave it on there and it wouldn't ever activate or cause issue. The solenoid is normally open so it wouldn't close on you at any point if never wired up. If you are purchasing a new coupler, I recommend simply getting one without the lockout solenoid like # T43397007K for example because it is one less...
    view full answer...
  • Availability of Replacement Parts for Brake Actuator on 1999 Heritage Tandem Boat Trailer
    In order to recommend a replacement master cylinder, I'd need to know the manufacturer and model number of the existing brake actuator. We carry replacement master cylinders for certain Titan, Dico, Atwood and Demco brake actuators. If parts are available, it might be feasible to replace parts as needed, but this will depend on the age of the actuator and the availability of parts. The brand name of the trailer isn't as helpful as you'd think, as there's no master reference showing which...
    view full answer...
  • Coupler Replacement for Tie Down Model 66 Actuator
    Your Tie Down Model 66 can easily be replaced by one of our actuators. The Titan part # T43397007K would be a great drum brake option that has a 7,000 lb capacity and can fit 2 inch or 1-7/8 inch hitch balls.
    view full answer...
  • Could Surge Actuator part # T43397007K be Welded onto Trailer
    Yes, the coupler part # T43397007K that you referenced could easily be welded onto your trailer. However, this coupler is zinc plated so it would need to be welded in a very well ventilated area.
    view full answer...

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