bing tracking image
  1. Accessories and Parts
  2. Dexter
  3. Brake Actuator
  4. Inner Member
  5. Disc Brakes
Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle w/ Disc - 2" Ball - 7,500 lbs

Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle w/ Disc - 2" Ball - 7,500 lbs

Item # DX39FR
Our Price: $334.10
Accessories and Parts
This item qualifies for Free Shipping
Shipping Weight: 14 lbs
Quantity: 
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

Need help with installation?
Locate installers near me
This replacement inner member slide fits into the existing outer member housing of your Dexter DX7.5L and Legacy UFP surge brake actuator. For use with single-axle trailers with hydraulic disc brakes. 1-800-496-5010 to order Dexter accessories and parts part number DX39FR or order online at etrailer.com. Free expert support on all Dexter products. Guaranteed Lowest Price and Fastest Shipping for Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle w/ Disc - 2" Ball - 7,500 lbs. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (19)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Dexter Accessories and Parts - DX39FR

  • Brake Actuator
  • Inner Member
  • Dexter
  • Disc Brakes

This replacement inner member slide fits into the existing outer member housing of your Dexter DX7.5L and Legacy UFP surge brake actuator. For use with single-axle trailers with hydraulic disc brakes.


Features:

  • Replacement inner member slide for Dexter DX7.5L and Legacy UFP brake actuator
  • Application: single-axle trailers with disc brakes
  • Electric reverse lockout lets you back up without actuating trailer brakes
    • Solenoid activates automatically when you shift into reverse
  • Ball size: 2"
  • Capacity: 7,500 lbs
  • 2-year limited warranty


099-060-10 Replacement Inner Member for Dexter DX7.5L and Legacy UFP Brake Actuator w/ Electric Lockout - Disc - 2" Ball - 7,500 lbs





Video of Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle w/ Disc - 2" Ball - 7,500 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Dexter Axle Brake Actuator - Replacement Inner Slide - DX39FR

Jeff: Hello everybody, this is Jeff at etrailer.com. Today, we're going to take a look at this replacement inner slide for the Dexter DX 7.5L disc brake actuator for 2-inch hitch balls. It has a 7,500 pound weight capacity. Now this is the replacement inner slide that'll fit into your existing outer housing on your Dexter DX 7.5L or the legacy UFP disc brake actuator. Basically this inner slide is the portion that will telescope inside the outer housing of your surge brake actuator upon breaking, and it applies the force to the master cylinder to supply hydraulic pressure to apply the brakes on your trailer. If you notice on this one, it uses a nice low-profile coupler latch to ensure nice, easy, secure connection.

This is an over center latch mechanism, which will only engage when the actuator's fully seated on your 2-inch hitch ball. And I want to demonstrate that, I happen to pull a 2-inch hitch ball that this would fit onto.And just to show you how to install this, you pull out this tethered safety pin right here that allow you to open the latch. If you look on top of the latch, it has this round portion that goes back and forth. If you just push that over it'll release it, and that'll open up your latch, just like that. And with your latch open, you can see that when you're over the 2-inch ball, it'll fall right into place, put your latch back down, and now you're hooked onto the ball.

And then for extra safety, slide this safety pin all the way through, and that'll keep the latch locked onto the ball. If by chance this does get hit or something and it unleashes it or unlatches it, that latch won't open all the way it'll still stay attached to the ball, and then you just push it back down.And then to totally remove it, just slide your safety pin back out, slide open your latch, and that'll open all the way, and you can remove it from the ball just like that. So it's a very simple way to connect and disconnect from your hitch ball. Also, if you notice it has this breakaway cable, which is included. Now this breakaway cable is required by law, this will attach to your tow vehicle.

And what this does is when it's attached, it will prevent a trailer runaway situation. So if this trailer happened to become detached from your tow vehicle, it would pull on this breakaway cable, which would then activate the master cylinder to apply the brakes on the trailer to prevent a runaway situation. Now, the master cylinder itself, let me flip this over and you'll be able to see it. Right here, this master cylinder is a constructed of aluminum rather than plastic or steel. It gives you a nice increased strength and corrosion resistance.And if you notice on the back of the master cylinder right here, you'll see it has the Selectric reverse lockout solenoid.

This will let you back up without actuating your trailer brakes. The solenoid, you can see the wires here is wired to your reverse light circuit, and it activates automatically when you shift into reverse. Again, the application on this is single axle trailers with disc brakes. The ball size we mentioned it fits on is a two inch diameter hitch ball. Weight capacity is 7,500 pounds. But that should do it for the review on this replacement inner slide for the Dexter DX 7.5L disc brake actuator, for 2-inch hitch balls. It has a 7,500 pound weight capacity..

Customer Satisfaction Score:


Customer Reviews

Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle w/ Disc - 2" Ball - 7,500 lbs - DX39FR

Average Customer Rating:  4.7 out of 5 stars   (19 Customer Reviews)

This replacement inner member slide fits into the existing outer member housing of your Dexter DX7.5L and Legacy UFP surge brake actuator. For use with single-axle trailers with hydraulic disc brakes.

by:

Direct replacement for my UFP actuator. Install was a little tricky. I couldn't screw on the brake line because the brake hose couldn't twist enough to screw it on. So I unbolted the entire tongue with the new actuator in it so I rotate the entire tongue to screw the brake line into the new actuator. Worked well. Actually didn't even need a wrench on the brake line. Bled the system with a power bleeder and no leaks noted. Seems great so far. Have not trailered the boat yet.




by:

Great product, easy to install. Poor shipping, the cardboard container was destroyed when it arrived. You can't put a heavy, solid metal object in a cardboard box with a handful of crumpled paper and think it will survive the delivery.




by:

Perfect fit on a 1983 Ranger Trail Trailer, previously modified for disc brakes, and surge brake application.




by:

Perfect fit replacement for my 20 year old trailer's master cylinder and coupler. Snap ring pliers, wire strippers and connectors and a couple of wreches to hook up the brake lines are all you need to make a quick replacement. My old one needed a new shock absorber and back up solenoid. Installing a whole new unit made more sense and I'm really happy with his replacement.




by:

we will buy again from etrailer fast an good product




by:

I received the inner slide damaged. The inner slide was in a cardboard box with shipping paper. The hydraulic fitting was at a 45 degree angle to the fitting and 1/2 of the threads were damaged/pulled off where the fitting was threaded. In addition, I proactively requested help to verify my inner slide to ensure I was going to order the correct one. The one I received is not a direct replacement as the rear pin is no where near the correct location. The only way to potentially make it work is to drill a new hole through the trailer to accept the new slide.

I want to return this unit and get the correct replacement that will install without modifying my trailer.


Comments
Customer Service will contact you about the damaged item. This is our only inner member we have for a single axle wdisc actuator.
-- Etrailer Expert Sierra K - 11/09/2021


by:

SHIPPING WAS FAST AND GREAT FOLLOW UP AFTER THE SALE. I HAVEN'T INSTALLED THE PART YET BUT IT IS AN EXACT REPLACEMENT FOR MY BASS CAT BOAT TRAILER. I'M SURE IT WILL WORK AS WELL AS THE 17 YEAR OLD ORIGINAL.




by:

Works as expected! Easy replacement even for a novice. Now a year later it is still living up to expextations.




by:

Perfect drop in for my old beat up UFP A-60 inner member.




by:

Shipment was delivered sooner than expected. Will be installing this weekend. I should have went this direction in the first place instead of just replacing parts within..




by:

Right part quick and prompt




by:

Awesome price great quality,the people at etrailer don’t cut corners.quick delivery. Thanks Mark




by:


Comments
Replacing an old actuator that wasn’t working properly looks to be 31 years old, should end with reviews that include, “amazing, works great, such a relief, should have done it sooner, and the peace of mind is well worth the money “. So accept those. I’d add, my first one did not function properly. I could not get it to apply pressure to the new disc brake assembly. I was near the end of etrailer’s return policy period, but they took the return and even sent out the new one before I had removed the “old” new one. Once I installed the replacement, pressure applied instantly and has been functioning as it should. My Mastercraft Prostar 190 on the trailer only weighs 2200 lbs, but I do feel relief and no consideration while towing. The product, and equally importantly—etrailer’s customer service makes this purchase a 4.95 star rating.
Gregg - 07/13/2022


by:

PART WAS AS DESCRIBED AND WHAT WAS NEEDED. IT WAS IN STOCK AND DELIVERED ON TIME.
DANIELLE WAS POLITE, COURTEOUS, AND EXTREMELY HELPFUL SALES ASSOCIATE.




by:




by:




by:




by:




by:



19
19

See what our Experts say about this Dexter Accessories and Parts

  • Replacement Inner Member Slide for LP7500 Actuator for Disc Brakes
    We do have the correct replacement inner member for your LP7500 actuator, which is the following part: - Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle with Disc - 2" Ball - 7,500 lbs # DX39FR This is the replacement for both the Dexter DX7.5L and legacy TDE UFP brake actuators; I have added a link below to a video review for you to check out as well.
    view full answer...
  • Replacement Inner Member for Tie Down 75LP Brake Actuator
    The Replacement Inner Member for Dexter DX7.5L Actuator # DX39FR is the correct replacement for Dexter DX7.5L and Legacy UFP Brake Actuators which includes your Tie Down 75LP. The two wires are connected to the reverse lock-out solenoid, one of the wires would be grounded to trailer frame and the other connects to your reverse light so when you reverse the solenoid locks out the coupler allowing you to back up the trailer.
    view full answer...
    Image 1 for Image 2 for
  • Replacement For Inner Member of UFP A 60 Actuator For Disc Brakes on Single Axle Trailer
    You do indeed have the right part number for the replacement inner member for your UFP A 60 actuator for your single axle trailer with disc brakes: - Replacement Inner Member for Dexter DX7.5L Actuator # DX39FR
    view full answer...
  • Inner Member Replacement for Dexter UFP A-60 Brake Actuator
    If you already have the housing welded on, you do not need the # DX63FR Dexter DX7.5L A-60 Brake Actuator w Electric Lockout. What you are looking for is the inner member. The # DX39FR Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle w/ Disc - 2" Ball is what you need. This is the replacement inner member for Dexter DX7.5L and Legacy UFP Brake Actuators like your UFP A-60. I have attached a review video for your reference.
    view full answer...
  • Replacement Inner Member for 2004 Nitro Bass Boat Brake Actuator
    Thanks for the picture and your patience! I did some research and made some phone calls, the correct replacement for your actuator is the Replacement Inner Member for Dexter DX7.5L Actuator - Single Axle w/ Disc - 2" Ball - 7,500 lbs item # DX39FR.
    view full answer...
    Image 1 for
  • What Is The Difference Between Dexter # DX99FR And Dexter # DX39FR
    The main difference between The Dexter Inner Membrane # DX99FR and The Dexter inner Membrane # DX39FR is that the # DX99FR is for a tandem axle with disc brake setup. The # DX39FR is for a single axle with disc brake setup. Both Dexter membranes have a 2 inch ball size and have a weight capacity up to 7,500 pounds. They both have an electric reverse lockout that lets you back up without actuating the trailer brakes. The solenoid activates automatically when you shift into reverse. I...
    view full answer...
  • Does The Replacement Inner Member # DX39FR Use The Aluminum Master Cylinder?
    The Replacement Inner Member # DX39FR uses the Master Cylinder Assembly # DX44FR with its durable aluminum construction. The brake components including the master cylinder are only compatible with DOT 3 and DOT 4 Brake Fluid. DOT 5 cannot be used as it will damage the internal components.
    view full answer...
  • Comparing Replacement Inner Member for Dexter DX7.5L Actuator Part DX99FR and Part DX39FR
    The only difference between the Replacement Inner Member for Dexter DX7.5L Actuator part # DX99FR and part # DX39FR is that the former is for tandem axle trailers with disc brakes and the latter is for single axle trailers with disc brakes or tandem axle trailer with drum brakes. I don't recommend using either actuator outside of these parameters.
    view full answer...
  • Solution for Replacement Inner Member for Tie Down 75LP
    Without the rear pin hole it does not look like the Replacement Inner Member # DX39FR will fit. The other pin holes also do not appear to line up. I would not recommend attempting to modify the housing to make this fit either. Also, this inner member is designed for a single axle. A dual axle would require the # DX99FR. The only solution would be to replace the entire actuator with one like the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout - Bolt On - Disc - 2" Ball - Zinc - 7.5K...
    view full answer...

Do you have a question about this Accessories and Part?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Mike S
Written by:
Mike S
Employee Manda E
Updated by:
Manda E

At etrailer.com 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.