If you want to use your tractor as a forklift, I highly recommened that you purchase a lift carriage and forks from your tractor manufacture. I also highly recommend that you have your dealer install it. Material handling equiptment such as forklifts are very dangerous and unless informed of the lifting capacitys of such attachments in respect to your tractor, can be an accident waiting to happen. Especially if you have people working for you using the equiptment. Aftermarket attachments such as clamp on forks are not usually recommended by tractor manufactures. I have personally been involved in a lawsuit involving an aftermarket fork attachment that didn't fit the tractor perfectly and wasn't installed correctly, causing a load to fall on an employee of the tractor owner. The tractor owner sued the dealer that sold the aftermarket attachment, the aftermarket attachment manufacturer and the tractor manufacturer. The tractor manufacturer was released of all liability, because the aftermarket attachment was not recommended by them. The attachment manufacture tried to blame the dealer and say that they weren't installed correctly. Anyway, I guy broke his hip and leg and had a hell of a legal mess, but I think he eventually got compensated by the dealer. Remember, a salesman will sell you anything if you ask and also remember that salesmen are not as knowledgable about the equipment as you would like to believe. Take the time to talk with a mechanic or service manager at your dealer when considering aftermarket attachments and implements.
Also like I mentioned, if you do put a fork attachment on your tractor to please weight your wheels if they are not weighted. Water ballast and wheel weights together. And remember, just because you put forks on your tractor, doesn't mean that you instantly have a 5000 lb capacity forklift.
Not to be the voice of doom, just speaking from experience.