I'm trying to figure out what model I need......hilly terain so I know I need a 4x4. I need a loader ,... tiller, brush .....a 15XXD and the 16XXD but I'm not sure about any stability issue especially with a loader. ........I'd hate to drive several hours and then get junk...
I've had a 1610D for awhile and a 2010D for a couple hundred hours, used in very hilly, rocky terrain. Both with Koyker loaders, an 80 & 125, respectively.
I second MickeyFX's view on the (over)loading and technically unsafe use of loaders on these yanmars, but I have observed that these machines are very finely engineered and made, and are overbuilt to a significant degree.
I do not find that these loaders are overpowered by the tractors, nor were they underpowered. I always keep 450-500 Lb on the three-point (RC or BB) so I've never felt dangerously off balance with any load that I could lift. MY curl on an overweight load (one I couldn't lift) would lift my rear slightly, but not the raise cyl. I have some very steep grades, and I have moved many tons of rock and dirt, sometimes surprisingly loads that I would estimate to be at or in excess of 1000 lb. (with the 125 on 2010D)
I will say the stock tires on either 1610 or 2010 were clearly the limiting farctor in the immediate safelty of operating with near or at lift-capacity loads. When operating with the oem tires, firestone or the chinese MIT, I felt dangerous with any more than a few hundred #. I ran the tires with 17-19lb, and was worried that a tire would blow when carring weight across sharp rocks or brush. A sharp-cut sapling took out the MITs on my 2010, and I got a pair of thai brookstone 6.00-14s, which are close to 6-14s, but a little heavier (6PR) and have a slightly larger rolling dia (I forget 3-5" or something) They are rated to run at a max of 46 PSI and 600# higher cap each. There is no doubt that the arrangement is (or feels) much safer. Little tire bulge, unless at max lift, and then there is very little flex. I run them at 36 psi. I try to avoid using 4wd due to the overlead on the front. I engage 4wd only in loose or slippery stuff. I plan on getting larger rears to get closer to an accurate leade match for the front (6%?) but there's too much tread left, the tires are pricey and I feel that I am not overloading the lead ratio too much. I find I can use the Diff lock with almost as much effect as 4wd, but I don't shy from using 4wd either.
I think FEL overloading is a very valid concern, as clearly stated by MickeyFX. I can echo his findings, as done with rough math on my YMs, but my only baseline for reference was the oem tire max capacity. I share the concern that the front end is overloaded. I feel as though the tires were the weakest link in that chain, but I sure don't want to rebuild a front end if I don't have to.
I have been very impressed with the design and capability of these Yams, and they appear to be very conservatively designed and built. I use mine well and thouroughly, doing work that I would not have thought possible. The small frame and compact form allow me to get into the heaviest brush and dense woods prevalent in these parts, and the only lack of safely I have experienced is due to inexperience and poor judgement in my part. I am certain if I ever have a catastrophic failure, it will be due to these factors, rather than any probability of failure on the part of the Koyokers or the Yanmars.
I would say your worry about getting junk can be applied in any market involving high value used equipment. There are a lot of diamonds in the rough out there, but one has to choose very carefully. Go over any prospective purchase with a magnifying glass and operate the unit extensively in every possible mode and operation prior to parting with your dinero.