How Do Tandem Axle Hydraulic Brake Lines Typically Attach to Trailer Axles

Question

Question:

Installing disc brakes on a fifth wheel RV and would like to know what you think about attaching the brake lines directly to the axles to cross from the main line side of the trailer to the other side.

asked by: David N

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Expert Reply:

I believe what you mentioned is a standard way of running trailer brake lines on a tandem trailer. I attached a diagram for the brake line kit part # 18TA-BLKIT and how it normally connects to a trailer. The main feed line runs to the first axle where a Tee splits it off to run to either assembly on the axle. These lines attach directly to the axle.

expert reply by: Jameson C

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Answer 1

Hi Chris! I am not 100% sure why you have two lines going to each brake, but I think that was to daisy chain them together. This was supposed to make bleeding the brakes easier, but I'm not sure if it really did much or not. The Kodiak #KOD59FR…

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Answer 2

I have no way of looking up which studs were used on your trailer, but if you can drive out one of the studs and provide the dimensions shown in the provided diagram, I'd be happy to recommend a replacement. I did find a few specs online for your…

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Answer 3

Let's start with the similarities. Both kits are compatible with L44649 and L68149 bearings and a 10-19 grease seal. Both kits are intended for use with a 3500 lb axle. Both are intended for marine applications and use dacromet rotor/hub…

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Answer 4

I will start by saying that your TDE 11033L hub uses the #L68149 inner bearing and #L44649 outer bearing, which means you have a pretty standard #84 spindle on a 3,500 pound axle. With that said, we do not carry Tie Down Engendering products, so the…

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Answer 5

The VIN doesn't give me really any information beyond what you already gave so I reached out to the manufacturer. You have the 3,700 lb axle, but it has the standard 3,500 lb spindle size based on the bearing numbers they gave me for your axle. I…

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Answer 6

Yes, the Demco #40716-15 Hydraulic Brake Kit will fit your needs for a 10" X 2.5" assembly. When measuring the drum use inside measuerments as shown in the attached photo. You will just want to confirm your flange bolt pattern is 4 on…

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Answer 7

I have actually linked a video that will help you with the process of bleeding disc trailer brakes. Go to about the 9:40 mark of the video. It is basically the same as bleeding drum brakes: make sure the actuator is full of fluid, move the actuator…

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Answer 8

The appropriate bolts for use on the Kodiak Replacement Mounting Bracket #KCMB10HRD are bolt #7-75 which are 20 threads per inch. These are grade 5 bolts that are 7/16" x 1-1/4" long. The corresponding nuts are #6-17 and the lock washers to…

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Answer 9

Sounds like you are trying to install the wrong brake line to the Kodiak Disc Brake Caliper #KDBC225S that you mentioned. The fitting size needs to be 3/16 inch like what comes with the #18TA-BLKIT. Since I don't know what brake lines you have…

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Answer 10

Hey James, we can help but we don't have the complete kit you are looking for as a single part number. For the slip on rotor brake kit you'd want the part #DE49YR. You'd need two of these since you have a tandem axle trailer. Then for the…

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Answer 11

By definition a duo servo brake assembly will have more braking power as the servo pushes on both brake shoes. The draw back to a duo servo is that they will apply 80 percent of the braking power when in reverse whereas a single servo will only apply…

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Answer 12

Uni servo and duo servo is basically the style of wheel cylinder. It basically puts pressure on either side of the cylinder. The styles are interchangeable so if you have one style over the other you can go with either style. As long as your drum…

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How Do Tandem Axle Hydraulic Brake Lines Typically Attach to Trailer Axles

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