Handel Parking Brake Valve
Port No.1: 12Bar (Suplay To Valve)
Port No.11: 12Bar (Outlet To Release Parking Brake
Port No.2: (Outlet/Evacuation Even Release Position to Parking Brake)
If pressure to port no.1 it's less from 12bar so, APM need to replace
If pressure from port no.21 it's less 12bar even release parking brake so, parking brake valve need to replace.
If port no.21 there's air even parking brake active, so parking brake valve there's internal leaking. so, need to replace parking brake valve.
If port no.2(evacuation) leaking continuesly, so that need to replace parking brake valve also.
