We see these requests many times, problem is you can rarely ever find one... at least that's what it seems on these forums.
A couple of things you might be able to do is check your pressure in your system to see if it's low. Usually, they are set on the low side. You can gain a couple hundred pounds of lift. Both upping the pressure for the whole tractor and increasing the FEL relief valve.
First you need to get a pressure gauge that will do 3,000 PSI and hook it up with a quick connect that matches your loader. Dead heading it will give you what pressure you have...
I tried to look up what your pressure should be but could not find it... do you have a manual for the loader?
Do you have a WSM (work shop manual) for your model?
Other thing you can do if you want to go crazy, is buy larger hydraulic cylinders for the loader you have. Do you know if a LA682 will even fit your tractor??