How do I check a grader (cat 120B) is working well before buying it?

Hi Guys,

I am looking at the possibility of buying a 120B grader, but I am no expert. I am wondering what I need to check on to make sure that the grader is in good working order before forking out hard earned cash? ie any obvious areas to check for oil leaks? Any must-do maneuvers during the test drive, etc?

Thanks in advance for your feedback...

Madozer.

How do I check a grader (cat 120B) is working well before buying it?