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  1. R

    JD 790 Sprockets?

    My U/C is wore out. I've thrown the tracks on my 790 a few too many times. The last time I noticed the holes in most all of the bushings, so I pulled the other one, coiled them both up, and got them ready to move. Then I went to pull a sprocket off...... Looks like the final drive has to...
  2. R

    Trick behind track chain splitting?

    For some reason the one track on my excavator got real loose and the adjuster is still adjusted where it was. Anyway, I went to split that chain to find the problem. I grabbed the 15lb sledge, and a shaft (to hit the pin), and a pipe to hold that shaft. I have got the master pin about 1/4...
  3. R

    undercarriage interchange?

    I was told by my track shop that the track chain on my JD 790 is used on a bunch of other machines. I use my machine very little and have been hoping to find a set of good used track chains. Is there anywhere that I could find which ones also used the same thing? I am not opposed to finding a...
  4. R

    I heard a 'bang' and then my track went loose?

    I went to move, and I heard a bang (could have been the sprocket slipping in the chain), and the entire track was loose, all the way, all the adjustment was 'off'...... I tried to put grease in the tensioner to tighten the track, but no grease will go in, like it's reached it's end. Could this...
  5. R

    JD 790 undercarriage

    I have a 790 excavator, and the U/C is nearly wore out. Is there any way (besides feeling) to know if the pins and bushings have been turned? The pitch is getting close to the end of it's life. I didn't realize it till I threw a track off, but the adjustment is already at the end. We had a...
  6. R

    towing a trackhoe?

    I am looking at buying a trackhoe that needs an engine. From what I have been told, the engine was wrecked with ether, so it does not run..... Can they be towed? Will it ruin the drive motors? This is a JD790D. Rodney
  7. R

    what does the robex in hyudai's mean?

    I saw a few hyundai's for sale, and some said "Robex" So, I got to wondering what the difference was between some that said that, and others that did not. Specifically, I saw two 130 machines, one Robex, one not. Sorta sounds (I did some searching on here) that older hyundai's are not that...
  8. R

    How many hours is too many?

    I've been looking around at excavators, and have decided that something between 12 and 20 metric tons is what I need, but for the limited amount of use the machine will have, I can't spend a big chunk of change on buying the machine. I'd like to keep my budget under $20K. I have seen machines...
  9. R

    Biggest excavator on a tag along trailer?

    I'm looking to get a machine of my own, and the possibility exists that it would have to be hauled, and I would like to be able to have that done with a dump truck (tandem) and a trailer. I don't know what most trailers are rated for, but I know that I have seen excavators on them already - and...
  10. R

    JD 290D excavator?

    Are they any good? I'm looking for something to do some light work - not going to be a production machine at all - I need to move some dirt and load it on my truck, maybe a hundred loads. I might get into some rocks, and would like hammer ability, the one that I was looking at does NOT have a...
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