Latest adventure: my 2n starting steaming pretty heavily in the field, and by the time I got back to the shop it was running poorly - it even dieseled a bit when I shut it down.
Coolant is just above the fins, radiator is clear of debris, belt has good tension and the water pump spins well when running. The oil level is in mid-range. But the bottom hose is cold to the touch!
I removed the top hose, and found there was no thermostat (though the hose did have a soft spot that was bulged inward). So I installed a new top hose, with a new thermostat, pointy end toward the radiator, about 4" from the block.
Started the tractor up, and it idled well for bit but then started steaming again. And the bottom hose is still cold to the touch.
Before I suspect the water pump (even though it's not leaking or squeaking) I suppose I should I try flushing the system in case it's just plugged with gunk? Can someone point me to a clear procedure for that? I've seen several discussions on-line but I must be dense, because I don't see how any of them put water through the block.