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+--- Thread: What’s this brake noise? (/showthread.php?tid=7257)
What’s this brake noise? - Lead_sled - 04-14-2021
What’s this foot valve noise?
I couldn’t upload a video, so I uploaded in YouTube. Here’s a link.
https://youtu.be/IThe_rr6MaA
RE: What’s this brake noise? - Rawze - 04-14-2021
have someone press the brake pedal, go outside and find it?
RE: What’s this brake noise? - Lead_sled - 04-14-2021
Finally found someone at a truck stop. That QR1 valve is now just throwing air. I guess it’s feeding back to the foot valve. It’s the foot valve that’s making the noise though. I never did get around to changing the QR1 valve yet. Guess I’ll get on that ASAP.
RE: What’s this brake noise? - Lead_sled - 04-14-2021
So, I didn’t order the QR1 valve yet because I came across a QR1 and QR1C. I’ve looked for info on the difference, but not exactly sure. I’m assuming I most likely just have the regular QR1. Any comments?
RE: What’s this brake noise? - RocketScott - 04-14-2021
The QR1C has a check valve in it that acts as an anti compounding valve
You don't have spring brakes on the front do you?
http://www.plazafleetparts.com/uploads/2/1/9/0/2190100/qr-1c_service.pdf
RE: What’s this brake noise? - Lead_sled - 04-15-2021
No, I’ve got regular style brake chambers, no springs. Unless of course you see something different in the pics I attached. Looks like regular QR1 valve then. It’s definitely 1/2” supply and 3/8” delivery ports.