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8N Fan Belt R R

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8N333XX

04-27-2000 15:25:40




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I have what looks like a 1947 8N Tractor in bad need of a new fan belt. I haven't ordered a manual yet and I know I need one. I do need some advice on replacing the original fan belt. The tractor has a front mount distributor, generator not alternator and what appears as a hand crank jack or receptacle bolting down the crank pulley. The original belt is notched, rotted and ready to go. Nolan stated in a reply to " fan belt" (3 April 00) the jack was for a front mounted hydraulic pump. It looks like a hand crank receptacle to me. I see no way short of removing the entire front of the tractor to replace a fan belt. Any suggestions? Thanks in advance
From Wonderful Waxahachie, Texas
Charles

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Lynn (WA) Sorry kinda long.

04-28-2000 00:17:05




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 Re: 8N Fan Belt R R in reply to 8N333XX, 04-27-2000 15:25:40  
I just did a major tune-up on my "49" 8N w/ front mount distributor.

It really doesn't take much time or effort to remove the hood and front end of the tractor. There are many advantages too. Taking it all apart allows you to accomplish maintenance that needs to be done from time to time on a 50+ year old machine. I can attest to the rewards because my klunky old tractor now is one hard pull'n monster that will spin the rears instead of stalling! (I can get so stuck now!)

Most of the parts are quite cheap and the maintenance is easy to do.

This spring I:

1. Replaced spark plugs and ignition wires.
2. Removed, cleaned, and lubed the distributor.
3. Replaced points, rotor, condensor, cap, and timed to spec. Timing is done with the distributor off the tractor. The distributor is keyed into the shaft so there is little danger of mis-timing if you mark where the rotor is.
4. Made new manifold gaskets and installed after polishing maiting serfaces.
5. Cleaned out and treated the fuel tank for rust.
6. Cleaned strainers on sed bole and carb inlet elbow. Replaced inline fuel filter (modification).
7. Replaced Carb. (last years rebuild didn't last).
8. Cleaned oil bath air filter and replaced oil.
9. Replaced all fluids and oil filter.
10. Flushed coolent system.
11. Cleaned out radiator flanges.
12. Replaced radiator mounting bolts.
13. Replaced fan belt.
14. Cleaned and inspected everything!

Six bolts and my wife and I can lift the hood off. There are just two nuts on blind carrage bolts that hold the radiator on. It's all easy stuff once you have the clearance.

It's like having a new tractor. It could barely limp out of the shed before I did all this. I harrow, plow, boxblade, and grade with mine. It works hard and needs good maintenance every year.

Get that shop manual and get into it. These things were made to be maintained on the farm. Have fun and good luck.

Lynn

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excellent advice.....Dell (WA)

04-28-2000 15:54:35




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 Re: Re: 8N Fan Belt R R in reply to Lynn (WA) Sorry kinda long., 04-28-2000 00:17:05  
Lynn..... thank you for posting..... Dell



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Old George

04-27-2000 17:54:34




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 Re: 8N Fan Belt R R in reply to 8N333XX, 04-27-2000 15:25:40  
Charles,

I had the same problem removing fan belt because someone had previously replaced it with too wide a belt. Take Claus' advice and it should not be a problem.



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Levon

04-27-2000 16:36:37




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 Re: 8N Fan Belt R R in reply to 8N333XX, 04-27-2000 15:25:40  
I'm not exactly sure what it is you have attached to your pulley. I just replaced my belt which has a shaft coming of the front of the pulley for the front end loader hydraulic pump. In order to replace the belt I had to remove the shaft. The shaft is screwed into a plate on the pulley. The catch is that it is left hand threaded so I had to turn it clockwise (instead of counterclockwise) to get it out. It was also screwed in extremely tight. Perhaps whatever it is you have is attached in a similar fashion. Hope that helps.

Levon

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Jerry

04-27-2000 16:04:25




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 Re: 8N Fan Belt R R in reply to 8N333XX, 04-27-2000 15:25:40  
Hey guy
That thing you see on the crank pulley could
be from a previous rebuild years ago.Its not to hard to stick that tool in that wierd looking nut and put so much pressure on it something gives.If the motor is locked up this will happen.Then you know the motor needs repair.My self if the crank
is good Iwould put it back in unless it broke in behind the pulley.If it broke in front of the pulley put the pulley back on,drill you at least 1/8 inch hole thru the pulley and shaft and put a rol pin in .Many years now for me.Also if you do this make sure you smooth and polish the ends so it will not mess up your seal.Take care -Jerry

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Claus

04-27-2000 16:00:47




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 Re: 8N Fan Belt R R in reply to 8N333XX, 04-27-2000 15:25:40  
Loosen the Generator to give some slack to the belt and then remove it and slide it over the fan and push it to the front of front pulley and it will come right out.. I used a 46" 5/8th inch belt....The next time I will probably use a 45" for a better fit to give some additonal clearance for the generator and right steering linkage...
Happy Motoring...
Claus



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8N333X

04-27-2000 16:30:10




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 Re: Re: 8N Fan Belt R R in reply to Claus, 04-27-2000 16:00:47  
Thanks for the suggestions Claus & Jerry. This old tractor is running just fine right now. There is no problem on removing the old belt off of the generator and then from the fan/water pump pulley. The problem will be in the gland nut or hand crank receptacle. There is too little clearance for a new belt to fit between this crank pulley "nut?" and the front flange that creates the "well" that the crank pulley is in. I will take your advice on the bell size for a replacement. Just as soon as I can figure out how to take this thing apart and put it back together. Any other thouthts?
From Wonderful Waxahachie
Charles

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Michael

04-27-2000 16:41:17




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 Re: Re: Re: 8N Fan Belt R R in reply to 8N333X, 04-27-2000 16:30:10  
Sounds like you have something on there that doesn't belong. Somebody might have put a pump on the front to run a front end loader. There shouldn't be anything there unless something was added.



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8N333X

04-27-2000 16:57:23




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 Re: Re: Re: Re: 8N Fan Belt R R in reply to Michael, 04-27-2000 16:41:17  
Ok Thanks. If this was a hydro pump drive connector and it takes a left hand thread to remove it, I can accept that. How is the pulley normally attached to the crank? I would suspect there is a key-way in both the pulley and crank. Is there normally a left-hand-thread bolt holding the pulley on?
From Wonderful Waxahachie
Charles



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Dell (WA)

04-27-2000 17:40:59




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 Re: Re: Re: Re: Re: 8N Fan Belt R R in reply to 8N333X, 04-27-2000 16:57:23  
Charles.....yep! that front pully is bolted to the crankshaft with a combo armstrong starter notched head bolt. Most hydraulic pumps bridge over the crank nut and fasten into 4 bolt holes in the pully. Then the hydraulic pump has a stinger shaft that fits the bridge.

By the way, I know where Waxahachie is, its just about 1/2 inch off the edge of the renta car map. Was concerned when the main highway into town was lined with all those funeral homes. Well, I thought all those stately houses with tall columns and circle driveways were funeral homes. (grin)..... Dell

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8N333XX

04-27-2000 18:13:31




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 Re: Re: Re: Re: Re: Re: 8N Fan Belt R R in reply to Dell (WA), 04-27-2000 17:40:59  
Thank You Dell. I see some one else knows what an armstrong starter is. I do need to remove it to get a new belt on! Is it left hand thread?
From Wonderful Waxahachie
Charles

PS I think one is a funeral homes

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Lynn (WA)

04-28-2000 00:27:52




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 Re: Re: Re: Re: Re: Re: Re: 8N Fan Belt R R in reply to 8N333XX, 04-27-2000 18:13:31  
Yep, I have the exact same thing on mine. There is plenty of clearance if you remove the radiator. My fan shroud would not allow me to pull the belt around the fan. The radiator and hood remove real easy.



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