Hey everyone - I just bought an IH 574. The markings and gauges are all worn off and I'm not sure what all the levers and pedals do. I am good on the PTO engage/disengage, 3 point raising/lowering, choke and all of the stuff I need to know for normal use. But I know there's a differential lock lever and a parking break and a light switch somewhere on the tractor but I'm not sure what does what. The two pedals on the right are confusing to me as well. Is there a general schematic that shows what all of these things do? Also, where do I find the serial number for this machine?