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weak hydraulics

  1. A

    Komatsu pc35 mr3 boom lift issues

    Pc35-mr3 sn/16776 Machine operates fine when it's cold as the hydraulic temperature rises with first 10 minutes of use the boom lift function starts to fade. Lifting at full extension of the stick becomes impossible, curl stick in closer machine will boom up slowly taking 15 seconds to reach...
  2. C

    Cat 215 Hydraulics Weak after 30 mins

    Hello all, First time posting but have been appreciating the forum's knowledge for a few years now. I have new equipment and old, would prefer the older mechanical stuff hands down any day of the week! Spring of 2023 I purchased a 1984 Cat 215 excavator. Serial Number 95Z00796-12Z06465 I am an...
    • chedens
    • Thread
    • cat 215 diagnostics hot hydraulic oil hydraulics mechanical diesel old machine running weak weak hydraulics
    • Replies: 6
    • Forum: Excavators
  3. B

    PC120-6 weak hydraulics

    I have a Komatsu PC120-6 that the hydraulics get really weak after 45 minutes of run time. It’s so weak it barely picks up the bucket. I just had the hydraulic pump professionally rebuilt last week ($4500.00) I also changed out the relief valve on the main valve block. The relief valve that’s...
    • blanchb
    • Thread
    • hydraulic pressure hydraulic problems pc120-6 relief valve weak hydraulics
    • Replies: 168
    • Forum: Excavators
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