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  1. rush

    Yanmar B50 Hydraulics - aux hydraulics/pressure test

    Thanks for the input guys I have been thinking about more since the last post and I think I agree Lantraxco. It behaves exactly the way he is describing. I am trying to run a wood processor and I am not sure I can do it with this configuration. I did find the extra slot in the valve bank with...
  2. rush

    Yanmar B50 Hydraulics - aux hydraulics/pressure test

    Hi Guys Its been a while since I was on here. I have been playing around with my B50 yanmar excavator hydraulics trying to figure out where I could tie in a pressure and return line for some aux hydraulics. I tapped into the biggest pressure line that comes off the hyd pump ( there are 2...
  3. rush

    '93 hitachi EX50 URG

    parts manual and rotary manifold ( center joint) Hey Bullfrog no prob. The parts man was scanned into two files that are about big (~800MB each), so I'm not sure whats the best way to get it to you. If you send me your email, we can try that ....... In the mean time here are some PDF...
  4. rush

    '93 hitachi EX50 URG

    Hi bullfrog i had a bad leak on mine a while back and was having the same problem. You can access the " center joint " as it is called in the parts manual or rotary manifold as other manufacturers call it from the top in front of the swing motor. It is a real pain to get to, but can be...
  5. rush

    Bobcat hauling

    this is how we load our bobcat sometimes.....
  6. rush

    Yanmar Mini excavator track tension relief valve

    Anyone know where the relief valve is located on my Yanmar B50 track tensioner. I have looked everywhere I can think of for it and can only find the grease fitting to pump up the track tension. My experience with other excavators is that the relief is right near the fill port, i can't seem to...
  7. rush

    Yanmar B50 ( B-50)

    I have an old Yanmar B50 ( mid 90's vintage). Does anyone know where to find a parts manual for this machine? Also I have a few worn track links, pins, and bushings (steel tracks) and am having trouble finding the replacement parts. I can find places that want to sell me the whole track, but...
  8. rush

    where to get parts for yanmars

    I also have a B50 from the same time period. I am looking for parts manual. Do you know where to locate one?
  9. rush

    Cat 235 swing motor

    Garp Thanks for the info. I took the PR valve off today and found that the first stage plunger with all the holes drilled in it was stuck open. I took it all apart, cleaned it out, and used some penetrating oil to lube all the parts up so that everything worked nice and smooth. I haven't...
  10. rush

    Cat 235 swing motor

    Thanks for the input. i will check the relief first. Is the relief valve located in the combiner valve body? BTW, do you happen to know what the purpose of the combiner valve is? Thanks Rush
  11. rush

    Cat 235 swing motor

    I am hoping there is someone out there who knows something about the old style piston type drive and swing motors for the old CAT 235 excavator. The swing motor on my old machine is very weak and whole machine swings down hill on its own unless the manual swing brake is engages. I am wondering...
  12. rush

    '93 hitachi EX50 URG

    The dip stick is right on the side of the swing motor itself and sticks down inside the swing device to a level just above the upper planetary. You can access the dipstick down in the hole next to the operator cab - behind the main boom arm. There is also a rubber drain tube that sticks out...
  13. rush

    '93 hitachi EX50 URG

    rotary manifold Kicker I had the same thing happen to mine a couple of years ago, so I know all about what you are going through. Mine got so bad that it would leak about a liter in 10 minutes when I was using the tracks. First off, the rotary manifold (sometimes called the center joint)...
  14. rush

    '93 hitachi EX50 URG

    Kicker according to my Deere dealer the EX55 has a completely difference swing device than the EX50. It seems like they have a little better info at the dealer for the EX55 than the EX50. I think charlie is going to send you the manual anyway. Let me know if you are not able to get it from...
  15. rush

    '93 hitachi EX50 URG

    Charlie I have been digging like crazy since I put it all back together. The swing is nice and tight - like it was when it was new. I have been stumping with it for about a week and am going to start digging a foundation next week. The new planetary gears are so precise and tight that...
  16. rush

    '93 hitachi EX50 URG

    NO can do Larry, now that I have it back up and running. You should be able to rebuild the one you have. Let me know if you can't get the drawings from Charlie, I have the ones he sent me in PDF format. Aslo Let me know if you need help getting gears cut. The guys at the machine shop that...
  17. rush

    '93 hitachi EX50 URG

    New gears are in and working great!!!! Hey guys Just wanted to give you an update on the swing device and planetary gear replacement project. We got all the new gears pressed in and the swing device all put back together with new bearings, seals, and gear oil. Started it up and it works...
  18. rush

    '93 hitachi EX50 URG

    Charlie Thats great - the parts manual is worth its weight in gold, since that is the only way you are ever going be able to get the right parts from the dealer. In the pic the bottom of the large turn table gear is just covered with grease and oil, there is surprisingly hardly any wear on...
  19. rush

    '93 hitachi EX50 URG

    Charlie-I tried your email, but I got it back. Send me a personal message on here and I can send you the parts manual I have for my machine. Doc has been a huge help getting me the parts breakdown for the swing device. Demonthones - are the the bearings you are talking about inside the bottom...
  20. rush

    '93 hitachi EX50 URG

    gears back from Hardening :drinkupHere is a pic of the gears back from the machine shop and ready to be sent off for hardening should mention the gears where cut from 4140 Pretreated tool steel. The next pic is after they came back from hardening - Plasma Nitride case hardening .015 deep -...
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