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Hitachi Ex60-3 hydraulic/electric problem

  • 22-03-2021 10:01am
    #1
    farmerjay
    Registered Users, Registered Users 2 Posts: 2 ✭


    Hi all,

    Looking for some help advice in regards to our machine.

    Was out a few days ago working it and about all of a sudden the the slew got very slow either direction. I sat there for a few mins working it then it came back sound.

    Soon after the slew went again and the Boom would not lift. I got out into the open ground to see what was happening. (Thinking the pumps on its way out)

    I tracked it to the sheds and check filters, lines etc. All perfect no debris. I decided to try it again and see.
    It was still the same, boom very slow to lift and slew very slow. Boom would not lift digger off ground. Then I noticed the boom would lift machine while operating another control with it and same with slew. If I held another control while slewing it would get back to speed no problem.

    I suspected the spools either on valve chest. Lifted the cover and started moving spools (6 of them) When 1 on right was pressed down the opposite on left popped up and vice versa. Then I noticed on one row, I pushed 1 spool down and its companion lifted slightly but slowly fell back down. Whats going on i wonder? Or is it further down in the chest the problem. Or is that normal?

    Wonder is it a block out of digger job or on machine fix and not familiar with layout.

    Also a side note - The digger is not reving as normal. Hydraulics are almost nearly unresponsive when put into P mode. This all happened the same time (Never just one thing)

    I can give more detail/pics if needed.

    Thanks guys.


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