I had a fellow farmer go with me to check out the Ford 555 backhoe, his first question was "why haven't you bought it yet moron?", so i said what the heck, the owner of it wants it gone so we settled on $700 for the backhoe, 3 extra buckets, and a pair of forks for the front bucket. Yeah i know i over paid for it! LOL ) We tried to get it to start and run, i'm pretty sure the fuel filter needs to be changed, the machine has set 6-8 years and not been started, but it will turn over. Where is the serial # at on it?? Some parts have a year breakdown and i have no clue what year it was made. Last question, should i use the Ambra 134 hydraulic oil from New Holland or would 90 wt oil be ok?