</font><font color="blue" class="small">( I am interested if anyone has had any experience with loaded rears on the CK30.While the tractor is terrific,I believe calcium loaded tires would give it more ballast for the FEL plus overall more traction and stability.Any comments folks? I am running Ags on mine. )</font>
Eldon, first let me state that I do not own a CK30 but have a reasonable amount of experience with equipment so based on other brand experience I would suggest you stop using your tractor's FEL until you get it properly ballasted. Now I don't have a manual for a CK30/130 loader in my office, but I suggest if you check your loader manual it might tell you how much ballast you need to put on the back of your tractor to balance it. Using a FEL safely and to full capacity has nothing to do with overall weight of the tractor, but it has a lot to do with balance. Balance is achieved with ballast.
My New Holland and my Kubota manuals both state that I am required to use BOTH fluid filled rear tires AND a weight box -or- wheel weights AND a weight box to achieve the maximum capacities out of the FEL. The Kubota is an ultra-light machine, the NH has a gross weight that is only a couple hundred pounds less than a comparable frame size Kioti. The Kubota has only a modest lift capacity, despite its lighter weight the NH will lift more than a comparable frame size/heavier Kioti. I've used many brands of commercial loaders (not TLBs but real loaders), I've never seen one that is built like a tractor, they are all built with the maximum weight on the rear of the machine. But a typical CUT style tractor has an loader that is almost an engineering afterthought. That said, I would strongly suggest that if you want the maximum performance out of your loader, you would need to balance the machine with proper weight. Any weight will improve your load. I prefer a weight box to loader tires because the weight box uses the rear axle as a fulcrum point and reduces the load on the front axle/tires and since you are running "AG" tires, that becomes an issue due to sidewall construction of R1/Ag tires.
Go back and read your owners manual. There should be something in there about counterweight or ballast. But realize that until you properly balance your machine, you are operating it in a dangerous fashion and can easily tip/roll the machine and cause yourself personal injury. You are better off to be safe than sorry.