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9N clutch/oil seals

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Rick M

11-09-2001 15:07:44




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I have my 9n apart and I'm ready to replace the clutch plate and disc. The reason for this is the clutch "stuck" and would not release, worked find one minute with normal freeplay, the next it was almost "all" freeplay and would not dis- engage. I see some oil, both from the tranny main seal and from the rear engine seal. How difficult is it to replace these seals? My manuals do not cover this. Thanks for any help you can offer. Rick M.

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9Njoe

11-09-2001 16:33:55




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 Re: 9N clutch/oil seals in reply to Rick M, 11-09-2001 15:07:44  
Rick, with the tractor split, the tranny seal is pretty easy to replace. The engine uses rope type seals and if you want to do it right, you will have to remove the crank.

I have heard of people working in a new seal without dropping the crank but it seems like it would be pretty hard to do it with the crank in the way.

I have also heard that there is another seal that can be used. I think Zane posted something a while back about using a TO-35 seal but I dont know about that.

Joe

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Jim(FL)

11-10-2001 05:44:00




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 Re: Re: 9N clutch/oil seals in reply to 9Njoe, 11-09-2001 16:33:55  
Joe, a rookie's observation on your (mine also, previously) situation. The engine oil if it leaks by the rear crank seal will leak out into the housing area between the engine block and the pressure plate. It then gets "distributed" inside the housing by the spinning pressure plate on all sides of the housing. The engine oil on the sides and bottom of the housing "should" run down the housing and eventually drain out of the weep hole under the clutch assembly (if the hole is kept open - (this is the job of the cotter pin bouncing around when you drive it)). Only the oil on the top of the housing directly above the clutch assembly dripping down on the clutch assembly can get on the plate surfaces.
On the other hand! (If you do not have a step-up or down or combo trans installed between engine and tranny) The tranny oil that leaks by the front seal of the tranny is collected and "funneled" forward by the shaft housing to be deposited DIRECTLY on the clutch assembly surfaces!!!!! My own opinion is the tranny oil is the bigger threat, also the easiest to fix. So be sure you at least replace the tranny seal. A compromise fix for the rrear engine seal is to drop the pan and rear crank bearing, then just replace the lower half of the rope seal. (I KNOW HALF_A@#@ed, but maybe better than what you currently have) (Boy this is long!)
Last but maybe not least, if you want to try and help prevent the "future" front tranny seal leak from reaching the clutch assembly - drill a 1/4 inch weep hole in the bottom side of the shaft housing about 3- 5 inches in front of the seal. This should drain a majority of the leaked tranny oil out of the shaft housing and down the weep hole at the rear of the housing, remember the cotter pin, and keep this area drained.

Good Luck, Jim

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