手控阀漏气当驻车制动手控阀置“停车制动”位置时,手控阀从排气口持续漏气,此故障是该阀的进气阀与阀座封闭不严,或是阀与阀座之间存有异物,或是进气阀密封件损坏所致,更换进气阀密封件即可解决。在驻车制动时,驻车制动手控阀漏气不会产生其它的故障。然而当把手控阀手柄置 Manual valve leaks When the parking brake control valve set “parking brake ” position, the manual valve from the exhaust port continuous leakage, the fault is the valve intake valve and seat closed lax , Or between the valve and the valve seat there is a foreign body, or damage caused by the inlet valve seal, replace the inlet valve seal can be solved. During parking brake, the parking brake valve will not cause any other malfunction. However, when the hand control valve handle set