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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: $324.94
Brake Actuator
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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. 1-800-940-8924 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.
  • All Info
  • Reviews (70)
  • 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   (70 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.


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


Great product works great on my boat trailer


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.


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


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


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.


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!


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.


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.


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


delivered early, sound packaging. item is as described and shown. Will definitely reorder from e-trailer. Thank You

Show More Reviews

See what our Experts say about this Dexter Brake Actuator

  • 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...
  • 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...
  • 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...
  • 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...
    Image 1 for
  • 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...
  • 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 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...
  • 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...
  • Replacing Atwood Weld on Actuator on Trailmaster Boat Trailer
    Since your coupler is welded on there won't be a way to replace it without removing the welds and then welding a new one in it's place. Since the Atwood couplers were so unique there isn't a similar one that would easily replace it either or have internal parts that could swap like a master cylinder. Using the Titan part # T43397007K that you referenced would be your best option. If the trailer is currently able to be towed you could tow it to a welder and give them the Titan to install...
    view full answer...
  • Replacement Coupler Recommendation for 1995 Shorelander Boat Trailer
    Your 1995 Shoreland'r boat trailer should have no problem fitting the Titan Brake Actuator # T43397007K. This is designed to fit the standard frame channel dimensions you have of 3 inches in width so it would be a great solution. This can be bolted or welded into place.
    view full answer...
  • Troubleshooting Smoke Coming From Trailer Tire Area on Trailer
    It sounds like you have 1 of 2 things going on. Either your tire is making contact with your trailer frame which is causing it to smoke, or you don't have enough grease on the inside of your hub so your bearings are causing all of that smoke. If it were your brake fluid you either wouldn't notice it as it would be such a small leak or your brake fluid would basically be empty. Check your tire for any signs of abnormal wear. If that looks good then you need to remove your hub and check...
    view full answer...
  • What to do When Trailer Coupler is Sticking
    If the latch for your coupler is sticking when it is closed or opened then I would try applying some WD-40, PB Blaster, or UltraLube Biobased Spray Lubricant and Penetrant. Once you apply the lubricant you will want to work the latch and and forth to help loosen up any grime that is in the latch mechanism. You may have to do this a few times and let the spray sit for a few minutes before it starts operating normally again. If this doesn't fix your problem let me know what kind of coupler...
    view full answer...
  • Is Titan Brake Actuator T43397007K for Drum Brakes
    I can confirm for you that the Titan Model 60 Brake Actuator # T43397007K is the correct actuator for drum brakes. There are different actuator options for disc brakes because they require a different master cylinder for higher psi.
    view full answer...
  • New Actuator Recommendation to Replace Atwtood Coupler on Tandem Boat Trailer
    That looks like an older Atwood coupler. Which I am not surprised it isn't working as it's the most problematic actuator that we have experience with. Most popular coupler we have that would work as a replacement would be the Titan actuator part # T43397007K as it fits the same channel width as what you have and has a 7k capacity for drum brakes. It also can fit either a 2 inch or 1-7/8 inch hitch ball.
    view full answer...
    Image 1 for
  • What Tongue Dimension is Compatible with the Titan Model 60 # T43397007K Coupler for Drum Brakes
    The Titan Zinc-Plated Brake Actuator - Drum - Multi-Fit Ball - Bolt On - 7K # T43397007K is designed to fit a 3 inch wide coupler. It does not give a height restriction to that coupler size. You can use 3x3, 3x4, or 3x5 inch steel to replace your tongue and use with this coupler. The top of the coupler ball will line up pretty closely with the top of the tongue. The weight of your trailer should dictate the dimensions of your tongue. If you trailer is 5,000 lbs or less, I would use...
    view full answer...
  • Brake Fluid Recommendation for Titan Zinc-Plated, Leverlock Brake Actuator
    Titan brake actuators like the part # T43397007K that you referenced need DOT III fluid in them at all times.
    view full answer...
  • How Tight to Get Latch of Multi Fit Ball Coupler on Hitch Ball
    The tightness needed for latching the Titan Zinc-Plated Brake Actuator # T43397007K to a ball successfully is "hand tight" which means you'd get it snug by hand which means the latch will be tight enough to secure to the ball but not so tight that movement is restricted.
    view full answer...
  • Can 7k Titan Disc Brake Actuator be Used with 6k Trailer Disc Brakes
    Yes, if you have 6,000 lb disc brake assemblies the 7k rated Titan surge brake actuator part # T43397007K will activate them just fine.
    view full answer...
  • Can a Bolt-On Surge Brake Actuator Replace a Weld-On Surge Brake Actuator
    Yes, you can replace a weld-on surge brake actuator with a bolt-on surge brake actuator and you can weld a bolt-on surge brake actuator to the trailer. If you are handy with a welder and have one available then I prefer this method over the other as you never have to worry about a nut backing off or drilling holes into the frame. If you can provide me with some more info on your trailer then I would be happy to recommend a surge brake actuator for you but if not I have attached our available...
    view full answer...
  • Replacement Titan Model 60 Actuator Recommendation for Escort Trailer BT22GAB
    We have just what you need. The part # T43397007K is a Titan Model 60 actuator designed for drum brakes like what you have that will work great. This will replace what's on your trailer with a brand new actuator. I attached a review video for this coupler for you to check out as well.
    view full answer...
  • Best Options for Replacing Hydraulic Drum Brake Actuator on Jayco Eagle
    There are a number of things you'll need to know before choosing the right brake actuator for your Jayco Eagle. Atwood MPD 85778 is actually just the literature number, so I wouldn't be able to tell you what a direct replacement would be. It's important to remember you'll need to make sure your actuator's coupler matches the size of the hitch ball on your tow vehicle, with the common size being 2 inches. As for the lockout, your brakes aren't going to require them but it's a highly desired...
    view full answer...

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