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Doctor I think we have a pulse!

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James Rader

07-03-2007 05:57:58




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But... the patient isn't healed completely... Further help from the doctors appreciated!

Well... I finally got some time to work on my 1940 9N last night. New ammeter and diode and rewired and it is running again! After the tranny froze (right after I changed fluids to get rid of the milky stuff) up this past winter and wouldn't shift, then the barn falling in, then the insurance hassle, then, then, then... I now have a tractor that is running. However, one of the things I had done was to put on a new manifold, it is too quite now and it just doesn't sound the same. That is making it hard for me to decide what my next problem is... It really sounds like it is only running on 3 cycinders, I have spark at all four though? The other thing is prior to all this it always started with the throttle all the way down, now it has to be half way or it won't even run, especially when warm. It has power but not what I remember or expect? Last night I pulled out some small trees that the wife has been bugging me about since??? well a long time, and it did the job but I know I couldn't plow with it. Full throttle is really more like about 3/4, in my estimation? I also notice I still have a very slight leak on the new manifold, I am not sure what to do to get it to seal up right? By slight I mean, if I spray a bit of water I get tiny bubbles on the block side of the gasket nearly all the way accross the manifold. (The size of pop fizz bubbles, and it isn't boiling)

So is this the manifold leak still, or bad spark plug?

Next problem, one of the things I did was replace the water pump (bought the new one here) however the new one is 1/4" longer than the old one. that puts the fan 1/4" closer to the radiator. the problem I have now is I can hear it hitting something but for the life of me I can not see what it is hitting, I would expect a scar or worse but I can't find anything. It is not a all the time thing but even sitting still it is an occasional ping noise like some one threw a pebble into the fan kind of noise???

The best news is a compliment from my wife..."it sure does look a lot better without that wire mess running over the top of the engine like before" (refering to the addition of the wire loom) Compliments from the wife are always nice...

Thanks

James

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GB in MT.

07-05-2007 08:35:12




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 Re: Doctor I think we have a pulse! in reply to James Rader, 07-03-2007 05:57:58  


James;
Have ya had a chance to chk. on the probs' yet??

Just wondering what you found out.
BTW: How is the ammeter handling the new wiring?? Charging, I hope!!??

Send me an email if you don't want to post it here.

We are always open. third party image

Gary

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James Rader

07-05-2007 17:45:10




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 Re: Doctor I think we have a pulse! in reply to GB in MT., 07-05-2007 08:35:12  
I'll email ya here in a little bit, but basicly I have not had time to tinker much.



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Upper Peninsula, MI.

07-04-2007 17:40:22




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 Re: Doctor I think we have a pulse! in reply to James Rader, 07-03-2007 05:57:58  
James, you have received good advice. Hopefully here's some more about the fan blade. One or more of the blades may be loose, ever so slightly. If so you will hear a tick-tick or a slight vibration and what you hear may sound just like it is touching something. Take it off and tighten up the rivets using a hamer etc, or hit them with a little spot weld. Good luck. Ron



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ED-IL

07-03-2007 09:52:03




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 Re: Doctor I think we have a pulse! in reply to James Rader, 07-03-2007 05:57:58  
Trust me, you would know if you were only firing on three cylenders. I just had that problem, and you would recognize the surging, sputtering, after-firing, etc.

When I changed my Manifold I noticed the block had worn away by exhaust outlet #4. I ground off the rust and I think I used some permatex gasket sealer on the block, then applied the gasket and new manifold.

Now the only leak is where the tailpipe meets the manifold.

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Ramrod

07-03-2007 08:30:55




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 Re: Doctor I think we have a pulse! in reply to Bob, 07-03-2007 05:57:58  
Don't use steel nuts, they will sieze. I see those are 7/16 -20 (fine thread) brass nuts. I found them at auto parts after checking with a couple of them that is...

Yep, there is a fan shroud for 9N, and you should run it on your 9N IMHO.

Ramrod

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James Rader

07-03-2007 07:50:56




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 Re: Doctor I think we have a pulse! in reply to James Rader, 07-03-2007 05:57:58  
I re-used the brass nuts (I know ya ain't supposed to do that) What size are they so I can maybe get them here in town today, or should I just go with a regular steel nut and high temp anti seize?

I was going to start checking wire and plugs tonight (I think I will have time)

No fan shroud (did the 9N have them originally? I don't know)

Thanks

James



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Ramrod

07-03-2007 07:41:28




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 Re: Doctor I think we have a pulse! in reply to Chris S., 07-03-2007 05:57:58  
If you have a fan shroud, that would be a culprit for the fan hit.

Ramrod

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souNdguy

07-03-2007 07:10:29




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 Re: Doctor I think we have a pulse! in reply to James Rader, 07-03-2007 05:57:58  
1, I'd fix the manifold leak.. May just need a retorque.. if not.. try some metalic spray paint on the gasket.. copper / aluminum.. etc.

2, If that didn't help the 'miss'.. narrow it down to a cyl by pulling 1 plug wire and listening.. replaceing it then pulling another. if you hait a wire that does less to engine rpm than the others do.. then ya found the problem.. Check the wire, the plug.. etc.

Soundguy

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GB in MT.

07-03-2007 06:24:19




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 Re: Doctor I think we have a pulse! in reply to James Rader, 07-03-2007 05:57:58  
James; I CAN BREATH AGAIN!!!! HA! I've been sitting here waiting since 5am. 1st problem; I would think the missing may be caused by a bad plug, or firing order is off, or shorting out of one of the plug wires.(first find whitch one of the cylinders is not firing, then work on that. Then go to the next problem.
2nd prob. Rad. fan is hitting something. ch. overflow tube.(may be loose), chk. bottom hose clamps.??
3rd prob. The loss of power may be the manifold, but I have a feeling you need to re-set your carb settings, or take the carb. off and go through it.

Make sure to trace out and fix, ONE prob. at a time.
I just heard my email anouncing. I'll bet that's you.
Keep us posted.
Glad the "N" runs again!!!!! TADA!!!

Gary

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