air brake emergency knob

Question

I am a problem   with the emergency pRK KNOb COMING ON when using the parking brake stopped in traffic when I release it the air pressure goes below 60 and it comes back on, then I have to build pressure backup in order to move . Any clues for an easy fix or is road service the best place to start.

dakdave · Answer

Why use parking brake in traffic? Does air drop if you use service brakes? It should not,if it does you have air leak.Releasing parking brake should drop air pressure very little.Take it to a truck repair shop and have it checked before you cause an accident

memgrove · Answer

You have an air leak that must be repaired to operate the rig safely.

azpete · Answer

are you saying you use the emergency park brake in traffic? or just in long backups and construction?

ca_traveler · Answer

OP, Get it fixed. This is a public forum and it's not advised to post your email address.

big_katuna · Answer

Sounds like you have a serious air leak. You should not lose pressure when the engine is running. The system should hold pressure several hours with the engine off.

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air brake emergency knob

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