There are many other machines but farm machinery is said to be different from the rest. The market now-a-days is filled with varied kinds and brands. The thing is,there is no rule that specifically says on how to care for these. With the case of used or second-hand items, caring for it means that you have to treat it just the same as how you would treat a brand new item. Make sure that you carefully read and understand the manual handed out by the seller. If in the case this isn't available, then make sure the owner will give out clear and direct instructions as what the original manual would have had.
If it's a tractor, then you should make yourself familiar with it before buying it at www.machinesales.com. Do not buy on impulse. Spend the weekend learning about the farm machinery. Take a test ride and run it around your area, particularly the farm. If you spot some problems, be quick to inform the seller or the previous owner of the machinery.
It's a great idea if the said wheel loaders, also comes with useful tools. To keep the tractor in the best shape and condition, it would mean bigger-sized tools and not like the regular ones used for cars ans smaller vehicles. If you can afford to purchase, then do so because these are very important tools. Otherwise, you may borrow from those who own these maintenance tools. To take care of the machinery, you must first take care of the tools. For smaller tractors, it would mean that the tools cannot be stored in their built-in compartments. Storing them on sheds is a great idea. The idea is to keep them protected from the rain and sun, so do not leave them to stay overnight outside and unprotected.
The engine fluids must be checked and inspected constantly. For how long you will use the machine in the field is said to be how the usage can be gauged and measured. Used machinery would usually have leaking parts which happens when it's old and used for a long time already. Always have a regular check-up and maintenance service done on the machine to keep this from happening or getting any worse. Read about cnc machining here at http://www.ehow.com/about_4902006_what-cnc-machining.html.
Examination on the used farm machinery should be standard procedure. Be realistic though, since it is a used item that you are purchasing. You can't expect it be unscratched and looking like brand new. Minor problems are normal but should not reach the point of not functioning in a few months time upon purchase.