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Ford 9N, 2N & 8N Discussion Forum
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Front Hub Grease Seal - Which Way?

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Phil B.

02-02-2004 20:52:04




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Okay, I'm thoroughly confused now, after searching the archives. I've disassembled four front hubs (8n & 9n) and both tractors had the front hub grease seals with the rubber pressed in with rubber facing the grease/bearing (away from the tractor). So, today I installed new bearings this way. Searching through the archives, I've seen directions that agree with the way I mounted them and others say the rubber part of the seal should face the tractor (metal flat side of seal up against the bearing). I looked at the manuals again and upon closer scrutiny, the rubber side of the seal appears to be facing the tractor, in the diagram. Which is it?

The reason I was searching through the archive after the job, is that I screwed up one of the seals and was double checking my method (or madness). Thanks.


Phil B.

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DM

02-03-2004 06:40:51




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 Re: Front Hub Grease Seal - Which Way? in reply to Phil B., 02-02-2004 20:52:04  
Phil,
I had the same questions. I ended up installing with the rubber facing the hub as shown in FO-4. It looks a little strange with a portion of the polished surface showing but apparently its normal. See pic. Did yours look like this?
Dave



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Chuck A

02-03-2004 17:04:16




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 Re: Re: Front Hub Grease Seal - Which Way? in reply to DM, 02-03-2004 06:40:51  
Look, if your rubber ring is NOT riding on the spindle flange it is in wrong. Your pic. looks to be wrong. It looks like it is steel riding on steel - not a good thing. Chuck A.



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Phil B.

02-03-2004 11:26:15




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 Re: Re: Front Hub Grease Seal - Which Way? in reply to DM, 02-03-2004 06:40:51  
Dave, I have a gap but is about half the thickness of yours. Are you sure everything (races, seal) are seated correctly? May be that the tolerance differences were large on these tractors (?). Seems to me that after listening to this debate, the way the polished end of the hub stays polished (not all rusty) is by the rubber seal riding against it. I'm going to change my seals to have the rubber pointing away from the hub (towards the tractor).

Learn something new everyday...


Phil B.

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Carol Martin

02-03-2004 05:44:04




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 Re: Front Hub Grease Seal - Which Way? in reply to Phil B., 02-02-2004 20:52:04  
I finally have to disagree with Dell on this one this is not a grease seal.. It is a dust seal..and according to the Mechanics at my NH dealer they definitely go with the rubber towards the hub.
(expensive little buggers).

Carol



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Phil B.

02-03-2004 13:53:50




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 Re: Re: Front Hub Grease Seal - Which Way? in reply to Carol Martin, 02-03-2004 05:44:04  
"...definitely go with the rubber towards the hub."

Carol - I think you mean the rubber installed facing the tractor, not the hub, correct? I think I know what you mean. The manual shows the rubber facing the tractor and as I said above, without the rubber riding against the flange on the spindle, I don't see how it could have stayed polished and rust free. I think the consensus is rubber goes towards the tractor, not the hub (a.k.a. dust seal).


Phil B.

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yer right . . . Dell (WA)

02-03-2004 08:44:46




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 Re: Re: Front Hub Grease Seal - Which Way? in reply to Carol Martin, 02-03-2004 05:44:04  
Carol..... ...I wrote...."the "LIP" of any seal faces what yer trying to keep in or out as the case may be"

Yer right, its a dust seal p/n 9N-1190-B and yer trying to keep the dust outta the axle grease and turning it into grinding compound.

Therefore install your N-Axle seal with the lips pointing toward the tractor spindle.

My appologies to all..... ...Dell



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Lee

02-03-2004 11:09:07




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 Re: Re: Re: Front Hub Grease Seal - Which Way? in reply to yer right . . . Dell (WA), 02-03-2004 08:44:46  
Well sheeeeite !! I installed 'em wrong in both of my tractors this fall when I greased the bearings. I was always taught that Dells logic of the lip going toward whatever you're sealing in is the way to go. I argued with myself for over an hour when I did the first one because it looked like the old seals were sealing against the hub but that didn't fit my old mechanics logic and I couldn't see how they'd seal the other way. It didn't occur to me that the logic was to seal out the dirt and not seal in the grease. I think I ran my old 8N with 'em in wrong for 17 or so years. Harumph !!
Thanks guys, Lee

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Chuck A

02-03-2004 04:43:04




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 Re: Front Hub Grease Seal - Which Way? in reply to Phil B., 02-02-2004 20:52:04  
I got seals for my 8N that had a rubber ring glued into a steel ring. The rubber went towards the axle flange not the hub. Again this was not your typical inner lip type seal. Which kind did you get.



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Jim Ag

02-03-2004 01:14:25




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 Re: Front Hub Grease Seal - Which Way? in reply to Phil B., 02-02-2004 20:52:04  
Here's how I was taught: on a tractor running in lots of dust, dirt, and water (rain and etc.) turn the lip or rubber to the outside or away from the grese, thus holding the dirt, dust, and water out of the grease and bearing. Since there are no front brakes for the grease the get on, so what if a little grease leaks out.



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Dell (WA)

02-02-2004 21:50:51




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 Re: Front Hub Grease Seal - Which Way? in reply to Phil B., 02-02-2004 20:52:04  
Phil..... ...its been my seal experience that the "LIP" of any seal faces what yer trying to keep in or out as the case may be. Since you're trying to keep IN the grease so it don't leak out, therefore install your frontaxle grease seal facing the grease..... .....Dell



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Thanks Dell - Phil B.

02-02-2004 22:40:30




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 Re: Re: Front Hub Grease Seal - Which Way? in reply to Dell (WA), 02-02-2004 21:50:51  
Dell, My sentiments exactly. I'm just looking for some reassurance here. Seeing as two different tractors had it this way, and of course you agree :^) it must be true! That damn manual is what has me in fits, cause we all know the manuals are never wrong...

Thanks,

Phil B.



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Carol Martin

02-03-2004 06:00:08




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 Re: Re: Re: Front Hub Grease Seal - Which Way? in reply to Thanks Dell - Phil B., 02-02-2004 22:40:30  
If you look carefully at the way this goes together you will see (I think) That if you put the rubber toward the grease the rubber will have to turn on the face of the bearing, which is not a smooth machined surface.Turned the other way it is rubbing on a smooth machined surface on the spindle. It is quite plain in the Pictoral view which way it goes..

Carol



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