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  1. V

    CAT 420D IT (A little smoke?)

    Best of luck to you NCMan. Good discussion!
  2. V

    972k blown EGR

    It really does depend how much coolant the DPF had to digest. A regen will try to burn out the ash but that only works if the heat can flow through the porous ceramics. If it's coated, the heat will pretty much only carbonize it and create a condition known as "face plugging"..... Definately...
  3. V

    972k blown EGR

    No sir, you are not off base at all. In absence of any denied submersion, a manufacturing defect could exist where a cooler core might not have got the right crimp or attachment to the header. A failure analysis *might* be able to determine if the failure is a cause or consequence by studying...
  4. V

    972k blown EGR

    Yup, seen it on more than one occasion. How the air got in there varies but the outcome is usually the same....
  5. V

    972k blown EGR

    The EGR cooler MUST be submersed in coolant at all times hot exhaust is passing through it. If not, it will indeed develop a thermal crack and leak. Think of spitting on a hot plate to envision what happens when just a corner of the cooler is exposed to air. Failure to purge the air from any...
  6. V

    CAT 420D IT (A little smoke?)

    Just to add to Delmer's comment, warm up should be at low loads and low engine speed. The engine oil filter base has a filter bypass valve in it to prevent the filter media from rupturing under high pressure events. If the engine is operated at high RPM, the oil pump will be trying to move a...
  7. V

    Volvo 380 E

    It still sounds like cavitation to me. High flow demand (filling a pair of the biggest cylinders on the machine) requires high volume of oil. If it can't get enough oil, it will pull air. Just to be sure, I'm assuming your running the proper viscosity and grade of oil right? If cavitation...
  8. V

    PC160LC-7EO or PC160-8

    If the undercarriage wear on the Dash 8 is similar, that's a good price. The Dash 8 has several improvements to fuel, hydraulic efficiency and break-out force over the 7E0. Best wishes...
  9. V

    Volvo 380 E

    Joan de joane curlew With what you shared, it sounds like your pulling air on the pump inlet (cavitation). Check the inlet screen for obstruction, the inlet tube and clamps for tight sealing and the tank breather for proper operation. Due to the noise, you may have some pump damage in process...
  10. V

    Greeting from Tulsa....

    I've been in the heavy equipment industry my whole life. Dad was a heavy equipment mechanic by trade and taught his trade to me. I apprenticed in an underground mine in Death Valley, California (Billie Mine) and then spent the next 20+ years working for three different Cat dealers. I've spent...
  11. V

    riddle me this- how did this break

    Ouch... Hydraulic cylinders are pretty simple devices. By design, the polish rod goes in and it goes out. It is not a load bearing device but rather a simple push/pull device. The weight of the piston and polish rods is all on the seals and fiber bushings and that is all they can hold. All...
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