Hello I've recently bought a older zetor 5211. And am trying to get it to crank. I am fairly new to the tractor diesel world but I'm pretty good mechanic on gas engines ( at least I think so . ) But I was told before I attempt to crank it it is VERY critical I replace ALL filters. My partner is telling me they .Ade washable filters on those older tractors. Was wanting to get some other input . Any suggestions?