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hydraulic return filter plugged

Discussion in 'Excavators' started by casby, Jul 9, 2019.

  1. casby

    casby Member

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    So with that, and the return filter already being changed (pilot and case drain filter being put in as soon as I have them, would the next step be look more into the indicator? The fact that the message goes on and off very consistently for me rules out the indicator. Am I wrong?
     
  2. Nige

    Nige Senior Member

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    Before going into replacing the indicator @ almost $250 I think personally I'd pull another oil sample and have it analyzed ($40 maybe?) just to see what the oil condition is like right now, but that's just me.
     
  3. kshansen

    kshansen Senior Member

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    I was wondering if there was a way to install a couple gauges in the lines to and from the filter to actually see the pressure drop across the filter? Not sure if there is a published spec. for what triggers the indicator.

    Also seems odd that it comes on after 20 minutes at working temp. Would seem that if there was in fact a restriction turning on the indicator it would be more likely to be triggered with cold oil. Unless there is something programmed into the monitor software to not turn on the indicator till oil temp reaches a predetermined temperature.
     
  4. casby

    casby Member

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    I’ll get another sample done.

    Kshansen: I really don’t see how to put guages on there? The return goes straight into the tank. You’d probably knew better than me, but before I start ripping into things, I’ll get a sample done I think and go from there. Thanks guys
     
  5. heymccall

    heymccall Senior Member

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    Did you assemble the return canister correctly? I dont think it'll drop then turn 180° without the seal plates being lined up, but, just wondering.
     
  6. heymccall

    heymccall Senior Member

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    Screenshot_20190711-184619_Chrome.jpg Thinking harder at this, the cooler or even the slow return check can't raise return pressure if they're restricted Screenshot_20190711-184118_Chrome.jpg , so, since the switch is obviously working, then the filter bypass valve is the most suspect part. #2
     

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  7. casby

    casby Member

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    Jul 21, 2015
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    Location:
    manitoba
    I did re-install as shown on the canister. (pull up, half turn, then all the way out and reverse for install).

    the valve assembly would require the tank emptied and pull the filter body right off?