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Spring brakes


1wonton

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Adding spring brakes to my old trailer.  Have service brakes only now, what components do I need?  Have relay valve on truck (B75 Mack) for truck spring brake:  do I need another relay valve on trailer, or what?  Simple diagram for a simple man, please.

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8 hours ago, alex g said:

Your quick release valve could be faulty or you have a faulty brake chamber leaking air back thru system

Sent from my SM-G386W using Tapatalk

Its coming out both quick release valves I figure there may be a bad diaphram or something wrong with one of the chambers.

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15 minutes ago, alex g said:

Sounds like you may have something plumbed wrong.

Sent from my SM-G386W using Tapatalk

I run the lines like they were run when I got the truck it only had spring brakes on the rear axle used the same line and split it with a T they had a distribution valve the spring brakes and service brakes came out of Which I eliminated because I ran the service brakes from a single valve instead of splitting it with one valve per axle.

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