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Tractor Talk Discussion Forum

M Farmall Fan Belt

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Big un

04-13-2007 14:32:18




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Howdy all. I need to tighten the fan belt on my 50 M and I can't figure it out.Please help.It can't be that hard.Thanks for ya'lls help.

Big un




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John M

04-13-2007 17:52:55




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 Re: M Farmall Fan Belt in reply to Big un, 04-13-2007 14:32:18  
No one has mentioned it, but when you run the flange in, you need to turn the engine over a couple of times as you tighten the belt.



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How bout a picture

04-13-2007 16:45:05




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 Re: M Farmall Fan Belt in reply to Big un, 04-13-2007 14:32:18  
Here is the link for a picture of an M engine with everything out of the way Link You cant see the set screw, but you can see how the front part of the pulley is threaded on. Someone mentioned the way they used to do things, In the early days some Hs and Ms had no starters, lights or distributors just magnetos. The belt on the main pulley and the water pump was the only one. We can't fault them for not having thought of everything while they were busy designing a machine that was infinitly refined compared to the F series it replaced and that would be in active use 68 years later. The real fun is when someone needs to change the alternator/generator belt that does not know how to change the waterpump/fan belt. You might just want to put a new generator belt on while you are working on the fan belt. The photo link is to a picture on Joe's M Farmall site. He has a lot of pictures.

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RustyFarmall

04-13-2007 14:58:37




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 Re: M Farmall Fan Belt in reply to Big un, 04-13-2007 14:32:18  
It could be a bit difficult. It is done by loosening up a setscrew on the fan pulley, and then turning the outer half of the pulley inward towards the back half of the pulley, thus causing the belt to ride higher and then it will be tighter. If this has not been done in awhile, you are in for a treat.



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Big un

04-13-2007 15:10:16




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 Re: M Farmall Fan Belt in reply to RustyFarmall, 04-13-2007 14:58:37  
Man,Rusty you just made my day,cause I'm sure it ain't been done in a while.I guess it is best to take the sheet metal off and spray it good with panther pee ain't it? Thanks for helping me with this Rusty.

Big un



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Jon Hagen

04-13-2007 15:47:21




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 Re: M Farmall Fan Belt in reply to Big un, 04-13-2007 15:10:16  
The set screw with lock nut that locks that threaded pulley half in position, fit quite deep into one of 4 grooves on the pulley to lock it. You need to back that lock screw out a long way so the nipple end of the lock screw clears that deep grove it seats into. Best may be to remove the lock screw untill you get the belt tight,as then it can not jam up as it would if not loosned far enough,plus you can look down the screw hole to make sure it is centered over a lock groove before you install the lock screw. Bottom the screw snug in a lock groove, then tighten the locknut.

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rrlund

04-13-2007 16:16:15




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 Re: M Farmall Fan Belt in reply to Jon Hagen, 04-13-2007 15:47:21  
Ain't it great,some of the ideas that they had back in the day?



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