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  1. N

    973 cat hydraulic chatering

    Thank you for the info, do you know anyone that would have a diagram of the hydraulic hoses showing exactly where the pressure relief valve is and how to check it out. I am not experienced with hydraulic systems. I will check the filters and reservoir first.
  2. N

    973 cat hydraulic chatering

    I have replaced the main mast pump and pilot pump about 50 hours ago due to blown seal allowing hydraulic fluid into the crankcase. Since then there has been intermittent jitters in the utility hydraulics but very sporadic. Once or twice in an 8 hour period. Now it does it continually with...
  3. N

    973 cat hydraulic chatering

    The main hydraulic cooling hose going to the radiator blew and was replaced. operatated the machine for about 2 hours since then. Machine has 6825 hours on it. Just replaced all filters about 50 hours ago.
  4. N

    973 cat hydraulic chatering

    Also needing help with a 973 cat G86 serial. The lift and bucket hydraulics are making chattering noises along with jerking operation. Hydro fluid level is good. Over the phone a friend said it was possibly the pump. However noise appears to be coming from something further forward of the pump...
  5. N

    Test

    test again
  6. N

    Test

    test
  7. N

    Cat 973 crawler loader

    final test
  8. N

    Cat 973 crawler loader

    Also needing help with a 973 cat G86 serial. The lift and bucket hydraulics are making chattering noises along with jerking operation. Hydro fluid level is good. Over the phone a friend said it was possible the pump. However noise appears to be coming from something further forward of the...
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