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Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes

Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes

Item # DM5425

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Demco Accessories and Parts - DM5425
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In Use/Installed


  • Trailer Brakes
  • Hydraulic Drum Brakes
  • Disc Brakes
  • Brake Lines
  • Demco
  • Brake Line Kits
  • 15 Feet Long
  • Steel Line and Flexible Hose
  • Tandem Axle
For tandem-axle trailers with either disc brakes or drum-brake torsion axles. Includes 16' steel line, (2) 17" steel lines, (2) 5-1/2' steel lines, 1' steel line, 2-1/2' steel line, (4) 18-7/8" flexible hoses, and hardware. Call 800-298-8924 to order Demco accessories and parts part number DM5425 or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes. Accessories and Parts reviews from real customers.


  • All Info
  • Reviews (12)
  • Q & A (29)
  • Videos (2)
  • Photos
  • Why etrailer?

Demco Accessories and Parts - DM5425

For tandem-axle trailers with either disc brakes or drum-brake torsion axles. Includes 16' steel line, (2) 17" steel lines, (2) 5-1/2' steel lines, 1' steel line, 2-1/2' steel line, (4) 18-7/8" flexible hoses, and hardware.


Features:

  • Provides lines and fittings needed to run brake fluid from surge brake actuator to trailer brakes
  • Designed for use on tandem, torsion-axle trailers with drum brakes or tandem-axle trailers with disc brakes
  • Includes:
    • (1) 193" Long steel brake line
    • (2) 17" Long steel brake lines
    • (2) 66" Long steel brake lines
    • (4) Hose brackets
    • (4) Brake line retainer clips
    • (3) 3/16" Brake tees
    • (8) Brake line control clips
    • (4) 18-7/8" Long flexible hoses
    • (4) 5/8" Machine bushings
    • (1) 12" Long steel brake line
    • (1) 30" Long steel brake line
    • (8) #10-16 UNC x 1/2" self-drilling hex washer-head screws


Hydraulic Brake Line Installation for Tandem Axle Trailers

1. 193" Long steel line runs from the hydraulic actuator back to the trailer axles.

2. Additional steel lines (17" long and 66" long) run from the center lines out toward the trailer brakes on each axle.

3. 12" Long steel line connects the line from the actuator to the 17" and 66" long lines that run along the first trailer axle.

4. 30" Long steel line connects the line from the actuator to the 17" and 66" long lines that run along the rear trailer axle.

5. Brake line tees connect the steel lines to one another.

6. Brake line clips and screws let you affix the steel lines to your trailer.

7. 18-7/8" Long flexible hoses connect the 17" and 66" long steel lines at each axle to each trailer brake assembly on that axle.

8. 5/8" Machine bushings are used in the connections between the flexible hoses and the steel lines.

9. Hose brackets let you attach the flexible hoses to your trailer.



5425 Demco Trailer Brake Line Kit - Tandem Torsion Axle - Drum Brakes and Disc Brakes







Video of Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes


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




Video Transcript for Demco Hydraulic Brake Line Kit Installation

Today on our boat trailer, we'll be installing the Den-co hydraulic brake line kit for tandem axles, part number Dm5425. To begin our install, we'll first need to remove the older manufacturer's lines. Now before we install the new line, we'll go ahead and drill a hole here in the frame so that we can run our line directly out of the frame and into the back of the coupler at the massive cylinder, instead of going out the frame and around the coupler. Now, with the hole drilled out, we'll go ahead and install the hose, take the long steel lines provided with our install kit, we'll straighten it out, run into the frame. Now we've got the hose pulled up into position. It'll go into the back of the master cylinder here at the coupler. As we thread into the master cylinder, we'll also twist the line with an extra set of hands as it goes into the frame so that we don't twist or pinch the hose or line as we're tightening it down. Quick tech tip: We'll make sure that the hose is centered of the hole so it doesn't wear against the outer edge and create a hole in our hose. I'll go ahead and move back to the frame of our trailer, start routing and securing the steel line, following the manufacturer's route along the driver's side frame rail. Keep in mind when bending your lines, that you don't want to make any sharp corners.

Make slow, easy bends so that we don't kink the line. We'll use the new hold down and self-tabbing screws to secure the line to the frame. Now, because of the excess length of this trailer, were going to need to modify our install kit. We'll take the thirty-inch piece of steel line and add it to the main line coming back from the coupler, using the tightened hydraulic brake unit, part number T1287900 to connect the two steel lines together. This will allow us to come back in between the two rear axles. From there, we'll add the T block, provided with the install kit, out of the block to the front axle. We'll use one of the hydraulic brake hoses, provided with the install kit.

Go into a T block on the axle and steel lines out of the block to both wheel cylinders. Our second output going to the rear axle, we're going to use the Kodiak hydraulic brake hose, part number BH-3MFS-3-5, to take the length from the first T block on the frame back to the second axle we'll install another T block to go off the both wheel cylinders. We're going to use a wing clamp to secure the line to the frame. We'll be using the field line coming out of the block to both wheel cylinders. We'll use the new hold down, self-tapping screw and secure the field lines coming out of the block to both wheel cylinders. Now to bleed out your brake system, it's recommended that you build the master cylinder, open up the bleeder and allow it to gravity bleed first and the fluid will dribble out. When you're ready to apply some pressure, you get an extra set of hands to actuate the brake mechanism and it will push fluid out. We'll do that ten to twelve times, making sure we get straight fluid each time, to make sure we get all the air out of the system. Quick tech tip: Make sure you keep the master cylinder full as you're bleeding the brakes. Now that we have the system completely bled out and the master cylinder cap back on, this will complete the install of our Den-co hydraulic brake line kit for tandem axle, part number DM5425. .


Customer Reviews

Demco Hydraulic Brake Line Kit for Tandem Torsion-Axle Trailers - Drum or Disc Brakes - DM5425

Average Customer Rating:  4.5 out of 5 stars   (12 Customer Reviews)

For tandem-axle trailers with either disc brakes or drum-brake torsion axles. Includes 16' steel line, (2) 17" steel lines, (2) 5-1/2' steel lines, 1' steel line, 2-1/2' steel line, (4) 18-7/8" flexible hoses, and hardware.

- DM5425
by:

Everything ordered is in great shape and fits my trailer. Prices are better than anywhere else I've researched and i will definitely pass along to anyone i know needing trailer parts. 469755



- DM5425
by:

No issues it works great for our appl ication 455125



- DM5425
by:

Excellent quality! Great price! 446288



- DM5425
by:

ORDERED ITEM - CAME IN ON TIME - NO COM PLAINTS 403724



- DM5425
by:

No issues good product 397866



- DM5425
by:

Hard to believe its been a year already. The new hydraulic brake system works great. Took us across the mountains in N. Carolina all the way to Myrtle Beach and back with two horses in the trailer. Planning on going again this year. Love it and would deal with you all again. 357765



- DM5425
by:

No issues - good product. 329507



- DM5425
by:

I put disc brakes on my 38 foot 5th wheel travel trailer due to the poor brake quality of the manufacturer. I now drive on the highway with much greater confidence for our safety. The stopping power of these brakes is incredible. The quality of the brakes are superior. I installed them myself finding the instructions accurate and easy to follow. There was a small part missing out of the brake line kit and the part was overnited to me by E Trailer. I have purchased many items from this company and have found the products to be of top quality and fairly priced. The customer service is outstanding. Thank you. 306848



- DM5425
by:

Great kit everything needed to install 4 wheel disk brake kit from the actuator to the calipers 288148



- DM5425
by:

All the parts you need to connect a two axle system. 247842



- DM5425
by:

It's a good kit, but as it's universal I had to do some customizing to some of the lines. With the amount of cutting and flaring of brake lines, I would have been better off going with scratch built brake lines. 233310



- DM5425
by:

Assembled easily. Made hooking up the plunging to my Kodiak calipers a breeze. 212611


Comments

Breaks working great. Wish I had done it sooner. Feel much safer. Dont waste your time with the upgraded bolts. Continue to loosen. I changed mine to grade 5 fine thread with nyloc nuts.

Robert G - 07/19/2016

19504
12
12

Ask the Experts about this Demco Accessories and Parts
Do you have a question about this Accessories and Part?


  • Brake Line Kit Compatible With Electric Over Hydraulic Actuator And Disc Brakes
  • The HydraStar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi, # HBA16 is compatible with the Kodiak Disc Brake Kit - 13" Hub/Rotor - 8 on 6-1/2 - E-Coat - 7,000 lbs # K2HR79E. The Kodiak Hydraulic brake line kit for tandem axle you asked about # 18TA-BLKIT will absolutely work with these two components, but you may want a longer kit for your application. These kits will also work: HydraStar Hydraulic Brake Line Kit - Tandem Axle - 30' Long, 1/4" Main Line # HS496-252 Demco...
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  • Brake Line Kit for Tandem Axle Disc Brakes
  • Yes we do. I recommend using part # 9579-2 line kit. If you are installing the kit on a utility trailer or a trailer that has a floor, you can run the lines along the underside of the trailer. If you have a boat trailer, you will need additional flex lines to make the transition between the rigid brake lines at each axle. I recommend using two of part # 80910.
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  • Best Electric Over Hydraulic Brake Actuator for Trailer Disc Brakes
  • We prefer the Hydrastar Actuator part # HBA16 as it is the most reliable and works the best. This would be the best option for your trailer. We have the least amount of issues with this actuator and it is the one our installers like the most so we recommend it the highest. For a tandem axle brake line kit that uses rigid lines except for the lines that attach to the assemblies you would want the part # DM5425. Or if you wanted a kit that has the lines, a breakaway kit, and the actuator...
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  • Stainless Steel Rotor, Caliper, and Additional Components for 8,000 Pound Dexter Axles
  • We have a couple different options for you to upgrade the components on your boat trailer. For a kit that comes with a hub and rotor, you can use the Kodiak Disc Brake Kit, 13 Inch Hub/Rotor with 8 on 6-1/2 Wheel Bolt Pattern for 8,000 Pound Dexter Axles # K2HR89DDS. This kit comes with dacromet-plated, cast iron rotor-and-hub assemblies, stainless steel calipers, stainless steel caliper mounting brackets, and stainless steel mounting bolts. The bearings, races, and seal measurements...
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  • Parts Needed to Install the Kodiak Disc Brake Kit part # K2HR79E
  • All of the parts you mentioned will complete a disc brake kit for a trailer, but you will need to know for certain if your current hubs have the same bearings that the # K2HR712D would take. You will need to pull the bearings of your current hubs to get the numbers that are stamped on them. If it's the same as what comes with the kit you would be good. They will need to be # 25580 and # 14125A. Most likely this would be the case since Heartland uses Dexter axles and a Dexter 7K axle uses...
    view full answer...

  • Best Tandem Axle Hydraulic Brake Line Kit for a Boat Trailer
  • For a tandem axle brake line kit that would work well for your trailer that would come with everything check out the part # DM5425. This comes with all of the fitting, lines and clips needed an would work well. I attached an install video for this kit for you to check out as well.
    view full answer...

  • Disc Brake Kit Recommendation for Lippert 7k Axles
  • The disc brake kit # K2HR712D that you referenced should work well for you. You would need a quantity of 2 of these for each of your axles. These have the same bolt pattern as your current setup and are rated a 7k. You can verify that these will fit your spindle by removing a current hub and checking the numbers on the bearings. If they are 25580 for the inner and 14125A for the outer this kit would fit the spindle and work well. This kit will fit a spindle that has a diameter of 1.25...
    view full answer...

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  • We don't offer a complete kit for 7K axles, but we do have hub/rotors or slip on rotors that could work depending on the inner and outer wheel bearings or wheel bolt pattern your hubs currently use. For instance, if your hubs use a 25580 inner bearing and a 14125A outer bearing, two of the Kodiak # K2HR712E kits which include the hub/rotors, calipers and caliper brackets would be a good start. The bearings and races are included. You'd also need a line kit like part # DM5425 and an...
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  • Parts Needed To Add Surge-Type Actuator And Brake Lines To Tandem trailer With Disc Brakes
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  • Complete Disk Surge Brake Setup Recommendation for a Rogue Tandem Axle Boat Trailer
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  • Disc Brake Conversion for 5th Wheel Trailer with 8-Lug/12-Inch Hub/Drums and Tandem 6K Axles
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  • Recommended Disc Brakes for a Magic Boat Trailer with 3,500 Pound Tandem Axles
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  • Electric Over Hydraulic Disc Brake Kit Recommendation for AL KO 6k Axles
  • Thanks for getting me the information I would need to help you pick out a disc brake kit. I was able to determine that you have inner bearing 25580 and outer bearing 14125A so the kit you would need would be the part # K2HR712. You would need two of these kits for all of your axles. For a tandem axle brake line kit you would want the part # DM5425 and for an electric over hydraulic actuator we like the Hydrastar the best here, part # HBA16.
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  • Converting Drum Brakes on 5th Wheel Trailer to EOH Disc Brakes
  • Converting a 5th wheel trailer from electric drum brakes to electric-over-hydraulic disc brakes will require a couple of items: the disc brake kit of hub/rotors and calipers, a brake line kit, an electric-over-hydraulic actuator, a breakaway kit and a brake controller such as the excellent Prodigy P3 # 90195. The linked article covers each of these items and is a good starting point for planning your project. A link is provided that will show you all disc brake kits with the 8-on-6-1/2-inch...
    view full answer...

  • Titan Electric Over Hydraulic Brake Parts Recommendation for 5,200 lb Axle
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  • Brake Controller Recommendation for a Trailer with Electric Over Hydraulic Brakes
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  • Can Electric Over Hydraulic Trailer Brakes be Installed on a Lippert 7,000 Pound Axle
  • If your Lippert axle uses inner bearing # 25580 and outer bearing # 14125A and 10-36 seals, # RG06-070 then the disc brake kit # K2HR712 will fit your axle. the bearings and seals are sold separately but the races are included and already installed in the hub/rotors. For a brake line kit I recommend # DM5425 which is for drum or disc brakes whereas # 9505 is designed more for drum brake applications. If your factory integrated brake controller in your 2014 Chevy/GM truck has an...
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  • From what I've read online, in its day, the Airstream Excella vacuum braking system worked very well, but at this point, they're obsolete. Replacement parts are difficult to find and the parts that would need to install on the vehicle aren't readily available. I saw several references in the forums to folks who simply changed their brakes to an electric drum system, which would be your least expensive option. If you wish to go this route, I'd need to know your inner and outer bearing...
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  • The Timbren system with the shortest distance between the trailer frame and the spindle of the axle with enough capacity for you would be the Timbren Axle-Less System part # ASR2KHDS01. That distance is 3-13/16 inches. For a disc brake kit that would work on this system you would want the Kodiak Disc Brake Kit part # K2HR35D-8. The smallest diameter wheel that will fit with this brake kit would be a 10 inch wheel. The lowest profile tire we offer to fit a 10 inch wheel would be the...
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  • Electric Over Hydraulic Disc Trailer Brakes with 6 on 5-1/2 Bolt Pattern
  • We have disc brakes for a 6 on 5-1/2 bolt pattern but the rest of the kit will need to be pieced together. I have included a link to all of the disc brake options we have with a 6 on 5-1/2 bolt pattern. For a brake line kit, if needed, we have # DM5425. For an electric over hydraulic actuator you can use # T4835700 which is the same one that is in kit # T4843700. I have included a link to our help article on the parts needed to add electric over hydraulic disc brakes to a trailer.
    view full answer...


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Info for this part was:

Photos by:
Jackie C
Written by:
Lindsey S
Installed by:
Jeff D
Updated by:
Adele M
Updated by:
Laura H
Video Edited:
Dustin K
Photos by:
Amber A

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