Adding Disc Brakes to a 5th Wheel Trailer with Tandem 7,000 Pound Axles

Question

Question:

I am looking to convert my electric drum brakes tandem axle fifth wheel toyhauler with 7000 lb 8 lug EZ lube axles to disc. Is there a complete kit I can buy or do I need to buy everything separately?

asked by: Todd

0

Expert Reply:

Since you are going from electric to hydraulic brakes on a 5th wheel trailer you will need to have an electric over hydraulic system. The various components will need to be chosen separately. For the brakes themselves I recommend the Kodiak Dacromet set # K2HR712D. This kit fits one axle so for 2 braking axles you would need 2 kits. This kit takes 2 of inner bearing # 25580 and 2 of outer bearing # 14125A with seal # RG06-070 (a set of 2). Check to make sure your existing hubs use these bearings. If not let me know the bearing numbers you have.

So for the above brakes you will need:

2 of # K2HR712D
4 of # 25580
4 of # 14125A
2 of # RG06-070

You will also need brake lines to go from the electric over hydraulic actuator to the brakes. For a 24 foot tandem axle kit use # HS496-252.

For the actuator itself I recommend the Hydrastar 1600 psi model # HBA16. This is one of the most popular options available because of how well it works and its reliability.

On the vehicle side you will need to have a brake controller that is compatible with electric over hydraulic brakes such as the P2 # 90885 or the P3 # 90195. If you have a factory brake controller it would need to have an electric over hydraulic mode. If it does not but you have a Ford or Chevy truck you can use adapter # HBA-CAM to get the factory controller to work with the actuator.

I have included a link to our help article on adding electric over hydraulic disc brakes to a trailer.

expert reply by: Michael H

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Answer 1

I can help you with greasing up your EZ Lube Axle. First thing I would check would be that the grease is not coming out of the back of the axle through the seal. If this is the case you will need to replace the seal. Our tubes like #L11390 have 14…

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Answer 2

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…

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Answer 3

If you're referring to the trailer brake magnets then you will attach the blue wire from the Bargman 7-Pole, RV-Style Connector part #50-67-103.

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Answer 4

Wiring connections for the Electric Over Hydraulic Brake Actuator are as follows. Yellow - Cold side of breakaway switch, The wire that goes hot when a breakaway occurs. Black - Positive connection on breakaway switch, The wire that charges the…

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Answer 5

The smallest height and the heaviest rating are opposing desires for your 16 inch tires. My recommendation for the strongest tire is the Provider ST235/85R16 Radial Trailer Tire - Load Range G #TTWPRG235R16. This tire is rated for loads up to 4,400…

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Answer 6

Trailer tires should always be filled to the max psi listed on the sidewall while cold. The heat would indeed cause the pressure to build but not to a point where an issue would occur. You are taking around 10 psi and that would not be the cause of a…

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Answer 7

The Demco Hijacker Autoslide 5th Wheel Hitch w/ Slider part #DM8550024 is a better option for an auto slide compared to the Pullrite SuperGlide because the Hijacker has 3 different height settings 15-1/2", 16-3/4", and 18-1/4" compared…

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Answer 8

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 9

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 10

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 11

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 12

From what I could find it looks like your 122R (red) and 122Y (amber) lights measure 3.75" x 1.70" x .81". We don't have any replacement lense directly for the GLO-BRITE lights but we do have some similar lights that you could use…

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