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Recent content by mkoepf

  1. M

    SK260-8 air in the hyd. tank

    I got the problem fixed. The oil level was a little low and below the return filters. Must have been airating due to that fact. The oil level was still well above the suction tube.
  2. M

    jd310d questions

    Chuck what did you end up doing to fix your problem? I have a 310D doing the same thing. Reverse is fine, forward has 1st with little power and barely 2nd and no 3rd or 4th.
  3. M

    SK260-8 air in the hyd. tank

    No compressor that I know of. I did check that pressure relief on the tank. It seems to be okay. The problem is intermittant it seems. It tracks straight but once the air gets into the system thats when the pump will whine and have poor performance. It seemed worse when the machine was cold. Its...
  4. M

    SK260-8 air in the hyd. tank

    I have a Kobelco SK260-8 with around 1040 hrs. I've been having problems keeping a thumb drawed up tight when not in use. The thumb is plumbed in with the auxillary circuit with manual shut off valves. This is the only part of the hydraulics that have been messed with. Today while trying to...
  5. M

    Kobelco SK330 Boom drops

    This machine had over 8000 hours on it.
  6. M

    Kobelco SK330 Boom drops

    The dummy relief just blocks off a circuit relief. The main relief was opporating fine. With many hours of troubleshooting we narrowed it down to the boom circuit specifically. Main relief issues should have showed up on other circuits as well. So all it left us was the cylinders or the valve...
  7. M

    Type of oil in the chain case of 1845C

    5 quarts is what goes in the chain case. might not look like enough but thats spec.
  8. M

    Kobelco SK330 Boom drops

    this is the part that cuts
  9. M

    Kobelco SK330 Boom drops

    I don't have any of the seat itself, just the tool. And they were taken with a phone so there not real clear. Let me know if they don't show. The tool has a guide that screws into the port for the circuit relief. Then the cutter rides inside the guide. It has a diamond cutter head. Basically...
  10. M

    Kobelco SK330 Boom drops

    I aquired a tool from Kobelco and cut a new seat in the boom circuit relief. Everything functions as it should now.
  11. M

    Kobelco SK330 Boom drops

    The RPM's are 996 at low idle and 2384 at full throttle. I just put an A adjustment into the machine a week ago. The RPM sensor is at 9 VAC at low idle. Pilot pressures are at 780 psi at the pump. My pump pressure with heavy lift off is about 5200 psi and with heavy lift on about 5400 psi. I...
  12. M

    Kobelco SK330 Boom drops

    I recorded pressures first right around 4900 psi. Now I have adjusted the main relief to 5200 psi regular and 5400 psi heavy lift. I have accessed the maintenance screens and recorded the info but nothing jumped out at me that seemed out of place. I removed, cleaned, and readjusted the rpm...
  13. M

    1845C trouble

    The milky oil means there is moisture in the tank. There is a drain plug on the bottom rear of the chain case. There is only supposed to be 5 quarts of oil in each case. If the drive motor was leaking internally that bad that it has no power you should notice a significant amount of oil in the...
  14. M

    Pipeline Thread

    Wish i would have had my camera in Cambridge Ohio the other day. They had A LOT of equipment parked there for this section of pipeline. It was neat to see all the dozers lined in a row.
  15. M

    Kobelco SK330 Boom drops

    I have an issue with the boom dropping once the joystick is released. Its an SK330-6 pre m/c machine with 8400 hours. The pumps were replaced around 4700 hours. I put gauges on and pressures are all in spec. Were doing some heavy lifting just shy of 18,000 lbs. According to the chart on the...
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