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Farmall & IHC Tractors Discussion Forum
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684 PTO slipping

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Danny P

07-11-2004 13:24:39




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Hi everyone. My first time posting here.
I have owned my 684 IH for 11 years. I just hobby farm with it, I don't do anything that puts a lot of stress on the PTO except bush hogging. Got into some thick fescue yesterday and the PTO started slipping. Since I don't do a whole lot that involves the PTO I am not overly concerned, but I guess I need to gather the knowledge necessary to fix the problem. I assume the problem would be worn clutches. Any other possibilities? How much disassembly is required to replace the clutches?
What is a good service manual to buy? Thanks,
Danny

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agmantoo

07-11-2004 16:30:58




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 Re: 684 PTO slipping in reply to Danny P, 07-11-2004 13:24:39  
Your suspicions are correct that the clutch to the PTO is out. The clutch is more a clutch pack than a conventional clutch. I have replaced 2 in a 574 and it is not too bad of a task. You do not have to disassemble the tractor as the clutch pack can be accesssed thru the cover plate after removing the fluid. The pto shaft is removed from the rear , another rather easy task. The hardest part of the task due to working in a tight space and poor light is extracting a dowel type pin. If I were to do another replacement I would make myself a drop light using a 12 bulb from a car and a light socket requiring 2 wires. These 2 wires would be connected one to ground and the other to the hot and then I would insert the light into the housing to where I could see a lot better. Good luck

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JB

07-12-2004 14:10:01




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 Re: Re: 684 PTO slipping in reply to agmantoo, 07-11-2004 16:30:58  
Hi is the PTO clutch pak in the transmission or is accessed thru the hole in the torque tube behind the bell housing ?

TIA
JB



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Danny P

07-12-2004 07:37:09




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 Re: Re: 684 PTO slipping in reply to agmantoo, 07-11-2004 16:30:58  
Glad to hear it's not a major undertaking. Thanks for the info.
Danny P



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agmantoo

07-12-2004 18:15:53




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 Re: Re: Re: 684 PTO slipping in reply to Danny P, 07-12-2004 07:37:09  
The PTO clutch pack is in front of the PTO output shaft. It is hydraulically activated



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