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  1. R

    '75 JD 310 rpm issue

    Want to thank all of you, the machine is up and going. Mike, thepumpguysc, rebuilt the pump and walked me through reasembly. The machine is back to work.
  2. R

    '75 JD 310 Swing Cylinder Rebuild

    All put back together and operating. Thanks y'all
  3. R

    '75 JD 310 Swing Cylinder Rebuild

    Yeah, I didn't see anything in my manual either. Does that mean I just start it up and go? When I replaced the hydraulic pump and cleaned the screen over the summer I remember the shop rebuilt the pump for me had me do something, but for the life of me, I can't remember what it was.
  4. R

    '75 JD 310 Swing Cylinder Rebuild

    I did. I had done this last summer and it was still clean as a whistle.
  5. R

    '75 JD 310 Swing Cylinder Rebuild

    Excellent, thank you very much! Next question, I drained the hydraulic oil and checked all my filters when I pulled the cylinders. Is there a proper method of recharging the system after refilling the sump? Thanks again, - Z
  6. R

    '75 JD 310 Swing Cylinder Rebuild

    Bump. Here's hoping one of y'all hydraulic wizards can help me out. Thanks -Z
  7. R

    '75 JD 310 Swing Cylinder Rebuild

    So I just finished rebuilding and reinstalling the swing cylinders on my 310. I took advantage of the down time while the injection pump was being rebuilt to do these and the stabilizers, all of which badly needed to be done. While working on the swing cylinders, I disconnected the hydraulic...
  8. R

    '75 JD 310 rpm issue

    It hasn't surged yet, but I'm not getting any work done climbing off the machine every ten minutes to clean the return line, so it's just going to have to come off. I'll PM you regarding your services in this regard. Thanks again all. I very much appreciate the help.
  9. R

    '75 JD 310 rpm issue

    Can you point me to a procedure for that?
  10. R

    '75 JD 310 rpm issue

    I had to unplug the return line screen maybe 20 times over a 2 hour period. So this leads me to wonder what disintegrated inside the pump. Here's a couple pictures of the stuff clogging the return line. It feels kind of like plastic, hard but malleable.
  11. R

    '75 JD 310 rpm issue

    I cleaned the return line (there is actually a screen in the fitting on the injection pump) and it ran a while, then died again. I removed it again and it was clogged. After a few rounds of this it seems to be running correctly. I'll report back after a couple hours on the machine. Thanks very...
  12. R

    '75 JD 310 rpm issue

    Thank you both. I'll report back in the morning.
  13. R

    '75 JD 310 rpm issue

    I'll give it a shot in the morning. When you say blow it out, do you mean to blow into the return line or into the return line fitting on the pump? Simon, I'll also check if the transfer pump has a screen or is allowing in air. Is there any reason not to just pull that off and make a new...
  14. R

    '75 JD 310 rpm issue

    Thanks Simon, I won't have help to do a leak test until Monday, but I put low psi air through the return line (leaves the top of the injector pump) and it bubbled in the tank like it should. Next I did another check along the fuel lines. There's no second filter. Definitely a good call to...
  15. R

    '75 JD 310 rpm issue

    Afternoon all. I'm having trouble with my 75 310. It starts fine, but then will quickly lose rpm and then die. At start up, the throttle operates as it should, but quickly becomes useless as it starts slowing down. The colder it is the longer it'll run before losing rpm and dying, but it's...
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