Its a Volvo Problem

[snailexpress]

(04-20-2019 )Evotrucker Wrote:  This is the new updated tractor protection valve, is the plumbing right?

All ports on the valve are marked. Volvo parts salesman doesn't know really much about parts they sell. Updated valve could have different ports layout. Green is service, red is emergency supply. Brown is control back to push valve on the dash. Black is hand trailer brake (Johnson bar)
Yellow line what is leaking air is air exhaust line. When you pull out red button out air pssssssss is from this line.
looks like you messed with ports connections and dash valve wants to pop out.