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How to Route Brake Lines on Travel Trailer Using 5 Flex Brake Lines Included in # T4843800 Kit

Question:

How do you complete an install with only 5 flexible brake hoses on a tandem axle as the picture shows, I believe I need two more 18 in flex hoses, one for each brake one from the pump and one for each of the axles for the brakes on the opposite side that makes 7 in all. Thank you for your info.

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Helpful Expert Reply:

There are a few different ways to route your brake lines. One method would take a minimum of 6 flex lines. You'd start at the actuator and go directly from the actuator to the steel brake line. The line would mount to the underside of the trailer, and would tee off at each axle. A flex line would lead from the tee to a hard line fastened to each axle, with a flex line on each end of the axle making the transition at each caliper. Four flex lines at each caliper, with two flex lines making the transition at each axle. If you used a flex line between the actuator and the steel line at the front of the trailer, you'd need the 7 flex lines as you mentioned.

If you look at the diagram I provided, you can see a different way of routing the lines that would only need the 5 flex lines included with the kit. The steel line portion of the brake lines would attach to the underside of the trailer frame, and the rubber lines would be used to make the transition at each brake caliper. The remaining line could be used to join the brake actuator to the steel brake line up at the trailer tongue. Because all the steel lines are connected to the underside of the trailer, you don't need a flex connection to transition at each axle.

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helpful expert reply by:
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Mike L


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