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Recent content by Cbrunner

  1. Cbrunner

    Vacuum Cup Question

    I'm having an interesting debate with a friend a need help finding the solution. In our plant are a number of suction cups attached to backing plates. Some of the cups have been vulcanized to the backing plate, some are just glued. He tells me that it is necessary to have the cups affixed...
  2. Cbrunner

    Skid-Steer Problem

    In order to steer this vehicle you will need to be able to rotate your tracks to some extent against the box. Using a counter steer type design in this application will be less than optimal due to the great length between your two sets of tracks. If you could make the entire length of the box...
  3. Cbrunner

    Counterbalance Valves pressure drop?

    Do you have CB valves on only one side of the cylinder, or on both ends (blind and rod)? What are the differences between the CB valves originally installed and field installed? As the others have already said, a properly installed valve will produce no restriction in one direction. The value...
  4. Cbrunner

    Variable displacement axial piston pumps

    Please ignore my last post - I hit the wrong thread in a hurry. Chris Brunner Brunner Equipment LLC
  5. Cbrunner

    Variable displacement axial piston pumps

    If you take the hose diameter and flow rate into account while designing the system, you can minimize the pressure drop to the point that it becomes negligible. Steel tubing is a great idea where feasible. When working with rotary flow dividers, it is advisable to select a divider slightly...
  6. Cbrunner

    Telescopic Cylinder query

    As Jboggs has said, the Devil is in the details. Depending on the cylinder and the mounting arrangement the load may be able to overcome the rotational force. Sometimes it just takes placing some runners on the bottom to be enough. Chris Brunner Brunner Equipment LLC
  7. Cbrunner

    Temp Sensors

    The reason they say not for fast moving air is because of the wet bulb / dry bulb problems with thermometers. Remember hearing about "wind chill" in weather reports? That's a calculated temperature based off of wind speed and relative humidity. Most of the duct sensors out there are...
  8. Cbrunner

    PC60 Komatsu Swing Brake Locks up

    Without more detail your question is difficult to answer (and not knowing the machine). Out of curiosity though, do you have the maintenance records? Following the problem down the line I would suspect one of two things; 1. Problem with the valve itself, the signal operating the valve, or the...
  9. Cbrunner

    Need some help with a math question

    Ok, let me describe the process and please correct me if I am wrong. First, you found what pressure would support the load on the blind end of the piston (described as FA). The pressure from FA would equalize to the AA, applying 510psi (3.517Mpa) additional force with the 10Klb load, causing...
  10. Cbrunner

    Need some help with a math question

    I swear I've lost my marbles... they are somewhere around here. A cylinder has a PO operated check on both rod and blind ends. The ratio of these checks is unknown. The cylinder is extending and lifting a load of 10,000lbs. The dimensions of the cylinder are 5 x 1 x 30. The cylinder is...
  11. Cbrunner

    Problem - Hydraulic Cylinders vibrate when stopped

    This system may also benefit from counterbalance valves installed in a meter-out type configuration on the cylinders. Although it entirely changes the power profile/energy use profile of the system, it would probably remove vibrations as it slows the movement of fluid due to physical...
  12. Cbrunner

    topic of discussions on cylinders dieseling.

    Ed; Thanks for your addition to the topic, very insightful! Chris
  13. Cbrunner

    Loading generator without a load bank.

    Thanks for the constructive ideas Mike - I have 1/2 a load bank now that I'm working on finishing, just don't have the funding to purchase the contactors right now. The bank I'm finishing is made from commercial heater banks, 100kw of them. I had read about the drying procedure, and not...
  14. Cbrunner

    Loading generator without a load bank.

    Thanks for the input everyone, I appreciate it. Chris
  15. Cbrunner

    Loading generator without a load bank.

    I don't have a load bank (or access to one). I need to load a generator engine (about 120HP) to make sure it's enclosure is not going to produce problems like overheating. I have read in many generator manuals about a method of shorting the generator coils and externally exciting the windings...
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