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hitachi ex120-2

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    Hitachi ex120-2 hydraulics overheating.

    Hi all, I have a 1994 Hitachi ex120-2 that is running hot on hydraulics after about an hour. No alarms or indicators saying it’s too hot. Checked with a temp gun and it’s around 160°-175°. Oil cooler is cooling the oil difference of about 10-12°. Pilot pump like has surge of chatter, one tick...
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    • hitachi hitachi ex120-2 hydraulic
    • Replies: 43
    • Forum: Excavators
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