1. Trailer Brakes
  2. Titan
  3. Disc Brakes
  4. 3500 lbs Axle
  5. 14 Inch Wheel
  6. 14-1/2 Inch Wheel
  7. 15 Inch Wheel
Titan Disc Brake Kit and Swing-Away Actuator w/ Electric Lockout - Tandem, 3,500-lb Axle

Titan Disc Brake Kit and Swing-Away Actuator w/ Electric Lockout - Tandem, 3,500-lb Axle

Item # T4843400
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Trailer Brakes T4843400 - 3500 lbs Axle - Titan
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Boost your trailer's braking performance by switching over to disc brakes with this kit. Save room by creating a foldaway trailer tongue with the included swing-away actuator. Electric lockout keeps brakes from actuating when in reverse. Lowest Prices for the best trailer brakes from Titan. Titan Disc Brake Kit and Swing-Away Actuator w/ Electric Lockout - Tandem, 3,500-lb Axle part number T4843400 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (1)
  • Q & A (33)
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  • Why etrailer?

Titan Trailer Brakes - T4843400

  • Disc Brakes
  • 3500 lbs Axle
  • 14 Inch Wheel
  • 14-1/2 Inch Wheel
  • 15 Inch Wheel
  • Titan
  • 5 on 4-1/2
  • Brake Kit with Actuator

Boost your trailer's braking performance by switching over to disc brakes with this kit. Save room by creating a foldaway trailer tongue with the included swing-away actuator. Electric lockout keeps brakes from actuating when in reverse.


  • All-inclusive kit has everything you need to switch your trailer over to disc brakes
    • 4 Disc brake kits
      • Hub-and-rotor assemblies
      • Grease seals, bearing protectors, races and bearings
      • Calipers with mounting brackets and hardware - attach to 4-bolt brake flanges
        • Hardware for attaching bracket to flanges sold separately
      • Hub/rotors and calipers are constructed of dacromet for superior corrosion resistance
    • Swing-away brake actuator
      • Space-saving, foldaway design
        • Actuator pivots back to create shorter tongue for storage
        • Foldaway portion can swing either right or left
      • Hydraulic actuator synchronizes trailer brakes with tow vehicle brakes
      • Electric reverse lockout lets you reverse without actuating your trailer's brakes
        • Solenoid activates automatically when you shift into reverse
      • Zinc plating is corrosion resistant
      • Breakaway kit included
    • Line kit with brake lines and fittings for a tandem axle
  • Disc brakes deliver better performance
    • Consistent stopping even at highway speeds
    • Shorter stopping distance than most drum brakes
  • Bolt-on installation - mounting hardware not included
    • Assembly required


  • Application: tandem-axle trailers
    • Axle capacity: 3,500 lbs
    • Wheel size: 14" to 15"
  • Overall rotor diameter: 9-3/4"
  • Bolt pattern: 5 on 4-1/2"
  • Brake flange configuration: 4 bolt
  • Actuator:
    • Ball size: 2"
    • Pivot length: 23-1/4"
    • Mounting: 3" x 5" wide channel tongue
      • For 3" x 3" channel tongues using 2 spacer blocks (T4842100 - sold separately)
      • For 3" x 4" channel tongues using 1 spacer block (T4842100 - sold separately)
    • Capacity: 7,500 lbs
    • Maximum tongue weight: 750 lbs
  • 1-Year warranty

Bearing, Race and Seal Information

  • Bearings
    • Inner bearing: L68149
    • Outer bearing: L44649
  • Races
    • Inner race: L68110
    • Outer race: L44610
  • Seal: RG06-050
    • Inner diameter: 1.719"
    • Outer diameter: 2.565"

Complete Kit Includes:

  • Swing-away trailer brake actuator with an electric reverse lockout
  • (4) Hub-and-rotor assemblies with bearings, races, seals and bearing protectors
  • (4) Disc brake calipers with mounting brackets
  • Hydraulic line kit
    • (1) 12-27/32" Long flexible hose
    • (4) 17-3/4" Long, 90-degree flexible hoses with inverted flare fittings
    • (1)19' Long steel line
    • (2) 66" Long steel lines
    • (1) 30" Long steel line
    • (2) 17" Long steel lines
    • (1) 4-1/2" Long steel line
    • (5) Hose brackets
    • (5) Hose clips
    • (3) Tees with brackets
    • (8) Line-retaining clips

Disc Brakes

An increasing number of trailer owners are switching over to disc brakes, and with good reason. Disc brake calipers have only one moving part, as opposed to the many moving parts you find with drum brakes. This means that with disc brakes there are fewer parts to maintain, fewer parts to get damaged and fewer parts to repair or replace, thus reducing the cost of maintenance.

Performance increases as well. Disc brakes deliver consistent braking even at highway speeds, unlike drum brakes, which often show a substantial drop in braking torque at higher speeds. In addition, disc brakes offer a much shorter stopping distance than drum brakes.

Trailer Brake Actuator

Titan's complete disc brake kit makes the conversion easy. Designed for tandem-axle trailers, this kit includes not only the disc brake assemblies themselves - along with all the necessary lines, fittings and mounting hardware - it also contains a swing-away actuator. The swing-away design creates a convenient, space-saving, foldaway tongue, letting you easily store your trailer even in the smallest garage. This hydraulic brake actuator has a higher psi rating for disc brake applications and includes an electric reverse lockout so that you can back up without activating your trailer's brakes.

The electric lockout is automatically activated when you shift your tow vehicle into reverse. The included solenoid wires into your trailer connector - which connects to your tow vehicle - so that it can detect when you are in reverse. When your vehicle is in reverse, the solenoid ensures that the hydraulic actuator does not activate your trailer's brakes, thus allowing you to back up your rig. To use the lockout feature, you must have a 5-pole flat, 6-way round, or 7-pole trailer connector.

Hydraulic Line Kit

Note: If you intend to run brake lines along the axles of your trailer to install disc brakes - as is often done for boat trailers - you will need 2 additional hoses (T4890700 - sold separately) and 2 extra hose clips (T0776400 - sold separately) with brackets (T0776300 - sold separately) to complete the installation.

Tandem Torsion Axle Brake Line Kit

  • (A) 12-27/32" Long flexible hose (T0777300)
  • (B) 17-3/4" Long, 90-degree flexible hoses with inverted flare fittings (T4890700)
  • (C)19' Long steel line (T4336000)
  • (D) 66" Long steel lines (T1086600)
  • (E) 30" Long steel line (T1061900)
  • (F) 17" Long steel lines (T1062200)
  • (G) 4-1/2" Long steel line (T1086700)
  • (H) Hose brackets (T0776300)
  • (I) Hose clips (T0776400)
  • (J) Tees with brackets (T0778500)
  • (K) Line-retaining clips (T0936600)

4839100 Swing Away Actuator - Disc Brakes - Bolt On

10HREKITBB Titan Disc Brake End Kit - Qty 4

4830000 Titan Tandem Torsion Axle Tubing Kit


Customer Reviews

Titan Disc Brake Kit and Swing-Away Actuator w/ Electric Lockout - Tandem, 3,500-lb Axle - T4843400

Average Customer Rating:  5.0 out of 5 stars   (1 Customer Reviews)

Boost your trailer's braking performance by switching over to disc brakes with this kit. Save room by creating a foldaway trailer tongue with the included swing-away actuator. Electric lockout keeps brakes from actuating when in reverse.

- T4843400

Professional service, quick delivery, everything fit. 159114


Ask the Experts about this Titan Trailer Brakes

  • Is the Titan Disc Brake Kit # T4843400 Good For a Salt Water Boat Trailer
    In the Titan disc brake kit, # T4843400, the hubs and calipers are silver cad plated, the actuator is zinc-coated, and the lines are all steel. This is not an ideal set up for a salt water application. The best option would be to go with stainless steel parts. You could start with Kodiak disc brakes, # K2R35S. For 2 axles you would need 2 sets. They fit 14 inch and larger wheels and will fit a hub with a 5 on 4-1/2 bolt pattern. The rotors are the over the hub style. The actuator...
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  • Does the Titan Disc Brake Kit and Swing-Away Actuator # T4843400 Come with Electric Reverse Lockout
    Actually the Titan Disc Brake Kit and Swing-Away Actuator # T4843400 comes with an electric reverse lockout solenoid already so you would not need to add one to it. If you check out the picture I attached you can see the wires of the lock out solenoid that one wire would would need to get run to your reverse light circuit and the other ground.
    view full answer...
  • Converting EZ Loader Tandem Trailer to Disc Brakes with Titan Disc/Actuator Kit, Part # T4843400
    You can convert your EZ Loader tandem boat trailer to disc brakes using the Titan Disc Brake and Swing Away Actuator Kit, part # T4843400, so long as it is compatible with your current trailer components. This kit is intended for tandem trailers with 3500-lb axles and wheels of 14 or 15 inches with a 5-on-4-1/2 bolt pattern and a 4-bolt brake flange. It uses inner bearing number L68149, outer bearing number L44649, and grease seal number RG06-050. You will need to check your current...
    view full answer...
  • Corrosion Resistance Provided by Titan Disc Brake Kit # T4843200
    The # T4843200 Titan Disc Brake System you refer to uses Titan's Dacromet corrosion-resistant plating. Performance wise, it's corrosion resistance is comparable to the silver-cadmium. Because silver-cad plating is some very nasty stuff (very toxic) it's being phased out and will be replaced with the Dacromet plating process. As far as corrosion resistance goes, the only better performer would be stainless rotors and calipers. Stainless would be a much more expensive option. We don't...
    view full answer...
  • Solution for Needing to Convert Trailer with Drum Brakes to Disc Brakes that Has Atwood Actuator
    Since Atwood is no longer making actuators they also discontinued their replacement master cylinders. The only solution we'd have is to go with an all new surge actuator that is compatible with disc brakes. If you had a tandem axle trailer with 3,500 lb axles the Titan brake kit part # T4843400 that you referenced would be a great solution since you said you are converting them from drum to disc. This comes with everything you'd need as far as assemblies, lines and fittings.
    view full answer...
  • What Position Should the Brake Calipers be Mounted when Installing Disc Brakes on a Boat Trailer
    When installing the Titan Disc Brake Kit, # T4843400, you will want to install the caliper mounting brackets so that the brake calipers will be on the trailing side of the axle. I posted a photo showing the proper orientation of the calipers for you. We also have a disc brake installation video that you may find very helpful when installing this kit on your trailer, see link. The parts used in the video are different, but the installation procedure will be very much the same.
    view full answer...
  • Information Necessary to Choose Disc Brake System for Boat Trailer
    In order to make a recommendation for you, I'll need some more information from you. I'll need to know: -Dual or Tandem Axle? -Capacity of Axle -Number of Lugs and Bolt Circle of Existing Hubs -Wheel Diameter -Inner and Outer Wheel Bearing Reference Numbers From Existing Hubs -Were you Wanting an Electric Over Hydraulic Actuated System or a Surge Coupler Actuated System? -What Braking System Does Boat Use Currently? With this information, I'd be happy to make a recommendation.
    view full answer...
  • How to Convert From Drum Brakes to Disc Brakes
    You can convert from drum brakes to disc brakes though you are going to need to know the weight capacity of your axles, your brake mounting flange bolt pattern, your wheel bolt pattern (I've linked a help article which describes how you can find this if you are unsure) as well as the bearings that fit your spindle. If you do not know which bearings you use you can take apart your hub assembly and looking at the bearings themselves; wipe away the grease and you should be able to see...
    view full answer...
  • Will a Titan Disc Brake Kit Fit a Tandem Axle EZ Loader Boat Trailer Model TEZR 17-20/22
    There are a couple of things to look at on your trailer to determine if disc brake kit # T4843400 will fit it. The most important thing to check are the inner and outer bearing numbers stamped into the sides of the hub bearings. This kit uses inner bearing L68149 and outer bearing L44649. If your trailer has different bearing numbers let me know what they are. The other thing to look at is the trailer tongue. The coupler included with this kit fits a 3 inch wide tongue. It can fit a...
    view full answer...
  • Information Needed to Find Correct Disc Brake Kit for Tandem Axle EZ Loader Trailer
    In order to make a recommendation, I'd need to know some more information from you. I'll need to know: -Capacity of each axle 2000 lbs, 3500 lbs, 5200 lbs, etc. -Inner and outer bearing reference numbers and grease seal part number -Bolt pattern of existing hubs (so they match your existing wheels) -Wheel diameter (last number mentioned in your tire size) The Titan # T4843400 kit you mentioned is for tandem 3500 lb axles, with L68149 inner and L44649 outer bearings and a #...
    view full answer...
  • What are the Dimensions of the Caliper Mounting Brackets in Titan Trailer Disc Brake Kit, # T4843400
    I went out to the warehouse and found a kit that uses the same caliper mounting bracket as Titan Disc Brake Kit, # T4843400. The center hole has a 3 inch diameter but it is open at the end. The bolt hole pattern has the 1/2 inch holes 3 inches apart on center. The 3/8 inch mounting holes are 5-3/4 inches apart on center. Overall it is 7-3/4 inches by 6-1/2 inches at its tallest and widest points.
    view full answer...
  • Boat Trailer Brake Setup for Spring Axles and Torsion Axles
    If the tandem axle trailer uses spring axles then the one axle with brakes should be the rear axle. If the tandem trailer uses torsion axles then the one axle with brakes should be the front axle.
    view full answer...
  • Availability of Tandem Axle Disc Brake Kit with 6 on 5-1/2 Inch Bolt Pattern
    We do have a large selection of disc brakes available with a 6 on 5-1/2 inch bolt pattern (along with the additional parts needed), however there is not a complete kit available for this bolt pattern like the Titan Disc Brake Kit # T4843400 that you mentioned. I have attached a link that will take you to our available selection of disc brakes with a 6 on 5-1/2 inch bolt pattern. You will want to determine the axle capacity on your trailer along with your existing inner and outer bearings...
    view full answer...
  • Swing Away Disk Brake Kit Recommendation for a Trailer with a 3 inch by 5 inch Frame
    I checked with Titan and the Swing Away Disk Brake Coupler Kit part # T4843400 that you referenced will fit 3 by 5 inch trailer frames so I would recommend it for you. Since your trailer is aluminum you will need to contact the manufacturer of the trailer to see if a swing away coupler can be used on it.
    view full answer...
  • Disc Trailer Brakes for Tandem 7,000 Pound Axles
    We do not have a kit for 7,000 pound axles but we have disc brakes for 7,000 pound axles. I have included a link to them for you. You would then need an actuator and brake lines. The actuator used in the kit you referenced is an Aero 7500, # T4839100. It fits on 3 x 5 inch channel tongues. You can use a spacer, # T4842100, if you have a 3 x 4 inch tongue. For lines and fittings, use # 9505 or # T4830000. I have included a link to some instructions for you as well.
    view full answer...
  • Will Actuator in Titan Disc Brake Kit for Tandem 3,500 lb Axles Replace UFP A-60 Actuator
    Yes it will! The swing-away actuator in the Titan Disc Brake Kit and Swing-Away Actuator w/ Electric Lockout - Tandem, 3,500-lb Axle # T4843400 will replace the UFP A-60 actuator. The UFP actuator is designed to bolt onto a 3" channel tongue, and the Titan actuator in this disc brake kit (which is the Swing-Away Actuator w/ Electric Lockout # T4839100) will also fit that size tongue. The Titan actuator comes ready to mount to a 3" x 5" channel tongue, so if you have a 3" x 4" tongue...
    view full answer...
  • Brake Fluid Recommendation for Titan Trailer Brake Actuators
    Titan brake actuators like the part # T4843400 that you referenced need DOT III fluid in them at all times.
    view full answer...
  • What Part of the Titan Disk Brake Kit # T4843400 Applies the Trailer Brakes
    The Titan Disc Brake Kit # T4843400 has a surge brake actuator that comes with it. Basically the actuator is made of two pieces and when the tow vehicle applies the brakes the weight of the trailer pushes the inner sleeve piece further into the outer sleeve which compresses a master cylinder that then creates hydraulic pressure to activate the brake assemblies that come with this kit. So the harder you brake the more pressure gets created and the harder the brakes apply. Then when you...
    view full answer...
  • Can the Kodiak Disc Brake Kit K2HR35D and Titan Kit T4843400 be Used with 16 inch Rims
    Actually both the Titan Disc Brake Kit part # T4843400 and the Kodiak Disc Brake Kit # K2HR35DS that you referenced can be used with 16 inch rims.
    view full answer...
  • What Size Trailer Tongue Fits the Aero 7500 Coupler in Titan Disc Brake Kit, # T4843400
    I spoke with my contact at Titan and the Aero 7500 Coupler included with the Titan Disc Brake Kit, # T4843400, is designed to fit on a 3 x 5 inch tongue. But, it will also fit on a 3 x 3 inch tongue or a 3 x 4 inch tongue if you were to use Titan Adapter Kit for Swing-Away Brake Actuators, # T4842100. This is a 1 inch spacer so for a 3 x 3 inch tongue you would need a total of 2 and for a 3 x 4 inch tongue you would need just 1.
    view full answer...
  • Adding Parking Brakes To Jayco Feather 19XUD
    You are only be able to add parking brakes to your trailer brakes if those brake assemblies are already equipped with a parking brake actuator. You can tell if your brakes are equipped with a parking brake by looking at the backing plate-there will be an actuating lever at the top of the brake assembly that attached to parking brake cable (see photo). If your brakes are not equipped with a parking brake feature, then you could wire a switch that would power the brakes when you are parked,...
    view full answer...
  • Available Disc Brake Conversion Parts for 7K Axles
    We do have both individual disc brake components and kits for converting a trailer to this type of braking operation. A great resource you can check out is the linked article (one each for hydraulic discs and one for electric-over-hydraulic discs) since these provide a complete recap of all the parts needed and links to each category. Our complete kits, such as Titan tandem kit # T4843400, are only rated for 3500-lb axles so you can use the linked page to see all 7K-rated disc brake...
    view full answer...
  • Converting Hydraulic Drum Trailer Brakes to Disc Brakes on a Boat Trailer
    You could put disc brakes on just the one axle, but I recommend going ahead and installing them on both since the trailer is set up for it already and there is a different pressure required for disc brakes. The difference is between 1200 psi for drum and 1600 psi for disc brakes so there is a possibility of adding too much pressure to a drum brake axle. Changing both axles to disc brakes will reduce wear and tear on both the trailer and the tow vehicle so a little extra expense now will...
    view full answer...
  • Availability of the Titan Disc Brake Kit # T4843300 for a Tandem Axle Trailer
    The Titan Disc Brake Kit # T4843300 is for a single axle trailer because it only comes with enough brake equipment for one axle. The tandem axle option is kit # T4843400 on our site. This is the exact same kit, just with enough brake line and extra brake kit for a tandem axle setup. I have linked some videos that you can reference as well.
    view full answer...
  • Options for Adding Disc Brakes to Tandem Axle Boat Trailer
    You can refer to the linked articles that concern the process of adding hydraulic disc brakes to a trailer. You have two ways to go with this: you can use a standard surge type trailer actuator coupler to provide hydraulic pressure for the disc brakes or you can use an electric-over-hydraulic actuator that takes an electrical brake signal from a controller like the P3 # 90195 back to the EOH actuator, such as HydraStar # HBA16. Each article deals with one of the two options and includes...
    view full answer...
  • Bearing Protector Grease Cap Installation on a Boat Trailer with EZ-Lube Spindles and Disc Brakes
    When installing a disc brake kit, like the Titan Disc Brake Kit, # T4843400, on your boat trailer I recommend staying with the original EZ-Lube grease caps, like part # RG04-040. Bearing protectors are not recommended for use with EZ-Lube spindles because the grease zerk in the end of the spindle will interfere with the inside of the bearing protector when pressed into the hub. Grease zerks are pressed into the end of EZ-Lube spindles and are usually very hard to remove. If you were...
    view full answer...
  • Recommended Disc Brake Kit and Actuator for Tandem Axle Trailer With Surge Brakes
    Typically when we see grease seals that are blown out it is because the user is attempting to put too much grease in the hub. Be careful not to put too much grease in the hub. To rebuild your system you can start with the Titan Disc Brake Kit part # T4843400, This is a complete kit that includes all components from the actuator with electric lockout to the brake lines, calipers, hubs/rotors, mounting flanges, bearings, seals and hardware required for installation. This kit works with...
    view full answer...
  • Disc Brake and Brake Line Kits for 8K Axles
    We have both rotor-only and hub-and-rotor disc brake kits for 8000-lb axles from Dexter and Kodiak and while these do not include brakes lines we do have many brake line kits to choose from for your installation. In fact if you refer to the linked article on the topic of adding disc brakes to a trailer you'll find links to brake line kits and other parts too. We do have complete Titan disc brake kits that include a surge actuator, brake lines, hubs and calipers, like 3500-lb kit # T4843300...
    view full answer...
  • Comparing Titan Trailer Disc Brake Kits T4843200 and T4843400
    There are several differences between Titan disk brake kit # T4843200 and # T4843400. The couplers are different. On T4843400, the coupler is a swing-away style. This requires that you cut the trailer tongue, bolt on the actuator, and when needed when storing, you can fold the actuator back. It also has a higher capacity actuator but both kits are rated for 3,500 pound axles. Other than that the parts are the same. Both kits use bearing # L68149 and # L44649. You will want to choose...
    view full answer...

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Info for this part was:

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Expert Research:
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Expert Research:
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Expert Research:
Adam R
Updated by:
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Updated by:
Laura H
Updated by:
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Updated by:
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Updated by:
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