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  1. J

    Komatsu d39-23 diagnostics

    Thank you!
  2. J

    Komatsu d39-23 diagnostics

    I’ve got a work equipment issue and I’m checking pressures. Manual states to check at “high idle” is there a certain rpm that is considered high idle or is it just above idle?
  3. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Thanks! I will dig a bit deeper. I’ve got a very busy week but will report back with what I find. Thanks again.
  4. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    heres a link to it with better pics. The mounting bolt pattern is different on this one though. https://sunoreparts.com/kayaba-hydraulic-motor-msg-27p-16e-20-msg-27p-23e-10-excavator-swing-motor-for-kobelko
  5. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

  6. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Well I just went out and pulled the swing motor relief valves, disassembled and reinstalled but the problem remained. I also switched the sides and the problem didn’t switch. However, I moved the joystick side to side rapidly at idle and the problem went away but came back. I ran the...
  7. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Well, we got about 10hrs of work out of the machine and the problem came back but only this time, it was reverse what it was before. Now it won’t swing to the right and has know swing brake to the left. Both left and right supply pressure are still the same as before. Do you by chance have a...
  8. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Yea, that’s why I said good news and bad news. I hate not knowing and having the thought of it happening again looming over my head. I’ve never broken into a swing motor before so I’m making assumptions about the inner workings. Either way, I think it’s safe to say the issue is/was in the...
  9. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Well, good news and bad news. I switched the supply lines to the swing motor which should have reversed the problem if it was in the valve block or controls. It didn’t which would suggest that the issue was further down the line. I went out this afternoon and removed the 6 swing motor mount...
  10. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Meant 2950 right and 3350 left wot
  11. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    I’ve let it run for a while now and it has changed. Now it’s 2400psi swinging left at idle and 1950psi at idle swinging right. 2950psi left and 3350psi right at wot
  12. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Won’t swing to the left but I’m getting 2900psi at idle and 3400psi wot Right swing is 2700psi at idle and 3300psi wot I assume this means the pump and control valve are good? That mean the swing motor is bad?
  13. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Won’t swing to the left but I’m getting 2900psi at idle and 3400psi wot Right swing is 2700psi at idle and 3300psi wot I assume this means the pump and control valve are good? That mean the swing motor is bad?
  14. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Is it ok to attached the gauges so that the lines just “deadhead” into them or will I need to tee into them?
  15. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    Went and picked up a gauge set from a friend but none of the fittings/adapters are right so I suppose I’ll try to find the right ones tomorrow.
  16. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    I will have to go pick up a gauge. Any chance you know what size fitting those are so I can grab whatever adapters I need?
  17. J

    Yanmar Vio 27-5 not swinging left and no brake to the right

    I’ve just picked up a Yanmar vio 27-5 and it will swing left for a few minutes after sitting over night but not once it starts to warm up. It swing right correctly but doesn’t seem to brake in that direction almost like the pressure from left swing is maybe bleeding to the right causing the...
  18. J

    Service Manual Trading Post

    Thanks! That’s why I was afraid to pull the trigger on eBay. I’m not really familiar with SIS, isn’t it a subscription based tool to order parts through?
  19. J

    Service Manual Trading Post

    Has anyone order the manuals on eBay that they send out on a flash drive? I’m needing the service/repair manual for a 312c and I’m finding several in the $70 range. I don’t mind spending it but I don’t want to send the money and get ripped off.
  20. J

    Service Manual Trading Post

    I’m looking for a 312c service manual. Any help outside going through the dealer?
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