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 | plots1
Join Date: Jul 2003 Posts: 563 mo 
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2003-03-28 52058
Are there different lengths on hyd. top links? Im think about getting one for my 790. it seems it would be a real welcome thing to have for doing box scraper work.Im getting tired of dismounting and mounting tractor several times to get correct angle for grading.
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 | DRankin
Join Date: Jan 2000 Posts: 5116 Northern Nevada 
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2003-03-28 52067
I am sure there are top links available to fit your 790. They are not cheap. ....
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 | TomG
Join Date: Feb 2002 Posts: 5406 Upper Ottawa Valley
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2003-03-29 52109
I think TISCO makes some ready-made hydraulic top-links that aren't too expensive especially if a rear outlet is already available. There are undoubtedly other after-market manufacturers that dealers would be aware of. The main thing is to get the cylinder length right and ends for CAT I hitch top-link mounts. Mine came as part of my forklift so I don't know about the source. It has CAT II ends and some adapter sleeves that size the loops to CAT I pin sizes. It also is a bit longer than desirable.
Where box scrapers strut their stuff is their ability to cut a high place, fill up the box, drag it to a low spot without cutting more and then spread it. That takes at least three top-link adjustments per pass and with a HTL it can be done on the fly. It's really a very useful technique if you have to stop and climb off the tractor for each adjustment.
Similarly, boxes tend to take bigger bites as they first start up a hill. Slightly lengthening the link cures the problem and trying to do it by raising the 3ph doesn't work that well. It's also handy to doz backwards to cut down bumps, back over the pile and pick up a box and then drive forward to spread it. That way useful work can be done going in both directions without taking the time to turn the tractor around but it takes even more top-link adjustments.
All in all my hydraulic top-link turned my grading work into something that could be done with quite a bit of time and aggravation into one of the more satisfying jobs I do. If I didn't have a rear outlet, I'd probably get a cylinder with long enough hoses so I could steal the loader bucket valve rather than use a box w/o a HTL.
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