VOLVO VNL 2017 Leaking air from abs modulator exhaust port

Hello Drivers,

I’m having issue with my truck and can’t figure it out. I have air leaking through abs modulator middle piece from the exhaust port when released parking brake (yellow knob). I replaced ABS modulator and it is still leaking burned $580. After doing research I thought maybe i have leaky brake chamber, brake chambers were checked using hose pliers all 4 of them still leaking. What i found is when i release the parking brake there is green 3/8 hose i think that goes from the quick release valve to the abs modulator and it is pushing air through that one and abs modulator exhaust port is leaking. Can you guys guide me what am i missing here ?Is it possible that quick release is bad ? I marked the hose that is pushing air to the abs modulator.

 

Thank you so much. Will replace it on Sunday and will give an update god bless you

 

I replaced the quick release valve and everything back to normal. Thank you for your help @Big Road Skateboard