What is the box with air lines and connections located at the very bottom between the small guard plate and (in front of) the oil pan? The truck is 21' Cascadia. Sometimes I hear air coming out of it after cutting air supply. It happens only with the running engine. Supplying air or switching the engine off usually stops the hiss.
P.s forgot to take pictures.
A box with air lines in front of the oil pan
Discussion in 'Freightliner Forum' started by badvik_83, Aug 6, 2023.
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cuzzin it, rolls canardly, JoeyJunk and 5 others Thank this.
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Quick release valve. Follow the air lines from the valve and see where they go.
rolls canardly Thanks this. -
Here is the picture
@JB7 was right, this is a QRV for the truck, if I got it correctly. Since the symptoms aren't constant, it was the valve not releasing air "quick", I guess.
p.s. Since it's about air, another question, please - one of the airbags on the trailer is hissing after the air is cut. But they're all visibly perfect. Is this normal or could there be an internal/membrane damage? No air is coming out while air is supplied and air tests show no leaks.Rideandrepair Thanks this. -
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