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main control vavle

  1. J

    EX120-2 system base pressure too low

    Hey everyone, I am looking for some more brain power with this problem. Machine is a 120-2 with what I believe to be a 120-3 main control valve (mcv). This means it does not have the adjustable pressure regulator on top of the unloading valve like the -2. Its on the bottom instead. According...
    • Jason Klassen
    • Thread
    • cracked control valve dp sensor ex120-2 ex120-3 hitachi internal crack main control vavle pilot pressure pressure unloading valve
    • Replies: 122
    • Forum: Excavators
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