When you ask a question here, itís usually a good idea to tell us:
1. The model of your tractor (2N, 9N, 8N, NAA, etc).
2. If it is 6v or 12v.
3. If itís an N, if the distributor is on the front or side of the engine.
4. If it has any major parts that are not OEM, such as electronic ignition, a side coil on a front distributor, etc.
Troubleshooting is different depending on the model of the tractor, voltage, ignition system & distributor placement.
And, even if you told us that last week, remember that youíre dealing w/ a bunch of guys w/ CRS.
Why do you want to remove the hood? It doesn't flip over like a Ferguson. Everything you need to get to for a tune up is accessable w/o removing the hood. If it has a front distributor, you remove that from the tractor to replace the points/condenser, etc.
But, if you still want to remove the hood........
After you get the 4 bolts off of the dash, remove the wire going to the head lights. Then, w/ the gas off, unscrew the fuel line at the carb. If the tank is full, you should drain the gas out. Then, get a couple of saw horses to put the hood on when you get it off. Remove the two bolts at the bottom of the dog legs. The grill is held in place by to hinges at the top & the dog legs at the bottom. After the dog leg bolts are out, the grill will fall out.....usually on your foot. Pull the hood forward about an inch, then up to clear the radiator neck. It should be easy after that. A helper makes it much easier.
Do a search in the archives for a 12v wiring diagram. Are you looking for a diagram to convert it to 12v? If so, why are you considering that? A 12v conversion isn't going to make a poorly running tractor run better. From my experience, I've only found two reasons to convert an N to 12v: If you need to run 12v equipment (sprayers, pumps, lights, etc) or your N has poor compression (like less than 90 lbs) and you do not want to rebuild it, then a 12v conversion makes sense. Before you do that, answer this question: "If tens of thousands of N's run just fine on 6v, why does mine need to be 12v?"