Problem solved. You were dead on with the pump rack not moving. With it not being used in a while, gunk apparently dried on and prevented movement. I sprayed with carburator cleaner and moved back and forth until it moved freely. The tractor cranked right up after this. I drained the oil in the pump and it appeared diesel fuel had mixed with the oil which concerns me. Is this a sign of wear around pump pistons?
Thanks to all for the help and advice in solving.