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cavitation

  1. Q

    Hitachi ex120-3 cavitation/aeration

    Hello all, looking for some help diagnosing my old beater. In the past few hours of use, the machine will whine like it's out of fluid under heavy load, particularly when swinging, but eventually with any function. Power is about 1/2 what it was before issue. The hydro tank is very bubbly after...
    • qwertylad
    • Thread
    • cavitation ex120-3 hitachi hydraulic
    • Replies: 11
    • Forum: Excavators
  2. M

    Unusual erratic noise from hydraulic pumps (Hitachi EX300)

    Hi everyone! We are hearing an unusual noise from the hydraulic pumps of our Hitachi EX300-1. It has twin axial piston pumps. The noise is difficult to describe but it is erratic/random and the pumps sound stressed (Attached is a short video of the pumps making the noise). It does not sound...
    • MKF1
    • Thread
    • cavitation ex300 excavator hitachi hitachi 300 hydraulic pump
    • Replies: 12
    • Forum: Excavators
  3. FlatTire

    Bobcat 753 Hydraulic aeration issue. Possible seal at the pump?

    I’ve checked the obvious with hose clamps from the hydraulic tank, to the inlet at the pump. I will probably throw on a new hose from the tank to the pump just to see, but if that’s not the issue, what seals on the pump could allow air in? Or what other potential areas within the system could...
    • FlatTire
    • Thread
    • cavitation foamy fluid pump intake leak pump seals
    • Replies: 0
    • Forum: Skid Steers
  4. S

    Cavitation in Samsung 210 lc3

    We have a samsung lc3 excavator and the oil keeps turning milky. If you leave it sit not running for a few hours the oil goes back to normal. I had the Volvo dealer come out and look at it. He said pump was junk. So we put a brand new pump and coupler on it. Put new filters on it and new oil...
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