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  1. J

    Hey, Are you still on this forum? I see you did a D65E in framerebuild and I was hoping you...

    Hey, Are you still on this forum? I see you did a D65E in framerebuild and I was hoping you could give me some suggestions on the best way to get to the rear bolts on the oil pan. Any help would be appreciated.
  2. J

    Komatsu D65-E Cummins 855 Stuck

    Its definitely an 855N. I think it may even be factory equipment but this machine is a bit of an oddball. Its a D65E-6B, and best I can tell the B means Brazil. I've found several listings online for the 6B and they all seem to have the 855 engine. Either way, thanks for the thoughts. I...
  3. J

    Komatsu D65-E Cummins 855 Stuck

    Hi Everyone, It has been awhile since I posted because back in the summer I had some engine trouble which forced me to park my D65 and rent something else to get the job done. Now that some of the pressure is off on my land clearing project, I want to start investigating my engine troubles...
  4. J

    Komatsu D65e-6 overheat

    Hi, I had a fairly significant turn of events that has left me too frustrated with myself to post any updates. A few months ago I developed a leak in one of the standpipes between the oil cooler and the water manifold. Rather than try to fix the leak, I just put more water in the radiator each...
  5. J

    Komatsu D65e-6 overheat

    Finally got her back together. Zero change on the overheating. There is probably a 15 or 20% improvement in pushing power. It would rarely spin the tracks before but does it readily now. The leaks on top of the Trans valve cover are also fixed. I am probably going to have to run it in short...
  6. J

    Komatsu D65e-6 overheat

    Between rain and other projects around the house I wasn't able to get the dozer put back together this past weekend. I did go ahead and take a closer look at the area around the steering valve assembly b/c I knew I had some leaks coming from that area that were not easy to reach with the seat...
  7. J

    Komatsu D65e-6 overheat

    Based on parts diagrams there is only a single oring for each port. No idea if the silicone rings are original. No sign of RTV on the cover gasket so this may not have been messed with before.
  8. J

    Komatsu D65e-6 overheat

    I ordered some viton replacement o-rings which should be in tomorrow. I am not overly confident that this will fix my overheating issue unless high volumes of oil are escaping between the valve assemblies. Either way it was a needed repair. I also ordered new oil seals for the shift levers. I...
  9. J

    Komatsu D65e-6 overheat

    It does look that way but I think something caused the ring to grow/swell. It is too large for the seat. I lined everything up on the bench and determined that all 3 bad seals were on the forward/reverse ports. Is anyone familiar with what type off rubber these red orings these are? I have the...
  10. J

    Komatsu D65e-6 overheat

    After wrestling with the seat frame for several hours I was finally able to get it dislodged and out of the way. I had to use a cable come-along to pull it up and out. The valve cover was fairly easy to remove except for the fact that it was well sealed to the trans. The valve assmbly was also...
  11. J

    Komatsu D65e-6 overheat

    Unfortunately I have confirmed overheating with a new converter temp gauge and with IR readings at various points. Its strictly the TC and Trans overheating at this point, the engine temp has been fine since cleaning the radiator. I am in the process of investigating the trans valve system...
  12. J

    Komatsu D65e-6 overheat

    I got the dozer stuck again this weekend. Fortanately, after last weekend I'm a dozer unstucking expert. :p It only took about an hour of effort this time. I spent most of the rest of the weekend digging a ditch along the bottom of the area I am working in hopes that it will help dry it enough...
  13. J

    Komatsu D65e-6 overheat

    I was planning to build a pond in this area anyway, but this isn't how I envisioned digging the hole. :p I'm very fortunate to have gotten it out on Sunday. We've had 2-3 inches of rain since Sunday night.
  14. J

    Komatsu D65e-6 overheat

    After I had put the dozer back together from checking those sleeve seals I decided to try to run it for the usual 45 minutes. About 30 minutes in, I was pushing a few loose stumps toward the pile and there was a low section that I had navigated before. I figured I could make it across again, but...
  15. J

    Komatsu D65e-6 overheat

    It looks like the sleeve o-rings had been replaced with a higher quality material at some point. They were still pliable and sealing quite well. I didn't do any additional investigations due to getting the dozer stuck in the mud and wasting the better part of the weekend to dig it out. Will...
  16. J

    Komatsu D65e-6 overheat

    Yep. When I killed the key it stayed at idle. Had to back the knob out all the wY to shut it down.
  17. J

    Komatsu D65e-6 overheat

    I've been looking over parts diagrams and the disassembly pictures from the manual. There are sleeves with orings that bridge the gap between the valve cover and the valves (see yellow highlight in picture). This is the main inlet for oil coming from the pump/filter and the main outlet for oil...
  18. J

    Komatsu D65e-6 overheat

    Here is a decent view of the clearing project and a nice storm rolling in.
  19. J

    Komatsu D65e-6 overheat

    Last night I checked resistance on the shutoff coil. I had a something like 34 ohms of resistance while working. As soon as the engine died I checked again and had an open circuit. Went through that process 2 times to be sure. So my shutoff coil appears to be faulty. I also realized that there...
  20. J

    Komatsu D65e-6 overheat

    I'm not sure if they are factory or not but I was at least glad to see there was some kind of fuel filtration. The two smaller ones on the left are the fuel filters and the large one is engine oil. There are actually two different oil filters on this thing as it also has the same sized filter...
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