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  1. R

    3 pumps in a row

    Tool King Glad you asked, I work for a small equipment rental co. We have 2 locations, and are giving RSC, United and Sunbelt a run for the money, and are doing pretty good. Thanks for checking that link-- works fine now Got to get some sleep, morning comes early...
  2. R

    3 pumps in a row

    Tool King Couldn't get that link to do anything -- maybe its me?
  3. R

    3 pumps in a row

    Tool King Thanks a bunch, I think that info will do the job. I'll keep you posted revbill
  4. R

    3 pumps in a row

    Hay Ya'll Typical Monday, spent all day chasing equipment from Ft.Benning Ga.to Alburn Al. Was unable to get back to the JD120 with pilot pump problem. Maybe tomorrow. Tool King Do you have a line drawing hydraulic schematic, it sure would be helpful. Thanks revbill I...
  5. R

    3 pumps in a row

    willie59 Boy that's a point well taken. I went back out to my service truck and looked at the old filter housing and the (relief valve?) It's not like a standard relief valve, its in the shape of a small spool valve, It is spring loaded and adjustable by shims of various thickness. Perhaps...
  6. R

    3 pumps in a row

    BillG Thanks for the tip, I believe I still have a Enerpack back at the shop, haven't used it for awhile. Thanks again. revbill
  7. R

    3 pumps in a row

    willie59 sorry I didn't mention about the pilot filter. There was a small amount of aluminium in the filter. Here is what I believe happened to the first 2 pumps, after tear down of the pumps I found that pressure had built to a point that the rotors were forced apart slightly, causing them to...
  8. R

    3 pumps in a row

    Tool King I'll let you know about the other manuals, thanks. Looking at what I've already down loaded from you, it sure looks like the relief valve on the pilot filter housing is not opening, or like you said the pressure is too high. Well, I'll find out in the next couple of days...
  9. R

    3 pumps in a row

    rgl726 Thanks for your post, yes tried to check the pressure but pump only lasted 5 to 10 seconds, I didn't get a good read. I don't know if JD tech tried to check pressure or not, I was not invited to that party. I'll keep you posted. revbill
  10. R

    3 pumps in a row

    Thanks again Tool King for the new links I'll keep you posted. revbill
  11. R

    3 pumps in a row

    willie thanks for the help, I'll be inspecting all items up line to be sure that there is no junk in them. I'll keep you posted, revbill "I don't care that others charge less for their work, they know what their work is worth."
  12. R

    3 pumps in a row

    Thanks Tool King. That link to the service manual is a life saver. Come Monday morning I'll get back to the job site, out in the woods where it chose to break down, (could have been in a worst place though) I'am going to check that new filter housing and see just how many shims they put in the...
  13. R

    3 pumps in a row

    I am working on a JD 120c. this unit has a Hitachi pump system. This piece of equipment has been working just fine until the other day when it quit any and all hydraulic functions. I found that the piggyback or charge pump had sheared the pump input shaft. I replaced the pilot filter...
  14. R

    Which brand excavator do you like the most?

    I am just a mechanic not an operator, however, my excavator of choice is a Volvo 210 Makes me look like an operator, is a good all around size for many different jobs.
  15. R

    Just Testing--Nothing worth viewing

    My post about the JD120c should have been under excavators, also I have the numbers off the tag on the pump. Thanks
  16. R

    Just Testing--Nothing worth viewing

    :(I am of course new to the form, but I have a dandy of a problem I need to ask for some help for. I am working on a JD 120c which has an Hitachi pump system in it. the problem is that the shaft on the small piggyback or charge pump broke the input shaft. Have replaced the pilot filter housing...
  17. R

    Just Testing--Nothing worth viewing

    seems like a strange way to get started, but we all live by different rules
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