Mainshaft Bearing question
Thread Starter
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Cruiser
Joined: Feb 2009
Posts: 105
Likes: 0
Mainshaft Bearing question
Hey` everybody` .. im back ..
I got my new primary parts in the mail today ..
I was asked if the bearing/seal in the inner primary cover leaked
as i would have to change it..
I dont see any new oil when looking behind the cover or near
the front drive pully but it is dirty as hell .. Was wondering if a good way to check is to spray DW-40 right on the inner primary bearing and then look behind the primary to see if it leaks through ? Would that hurt anything ?
Im trying to avoid fixing something if it aint broke so to speak ..
Because im broke after buying parts all week ..
I know if this needs to be replaced it a son-of-a-gun as i have to
buy a Mainshaft Bearing Race Puller ..
I got my new primary parts in the mail today ..
I was asked if the bearing/seal in the inner primary cover leaked
as i would have to change it..
I dont see any new oil when looking behind the cover or near
the front drive pully but it is dirty as hell .. Was wondering if a good way to check is to spray DW-40 right on the inner primary bearing and then look behind the primary to see if it leaks through ? Would that hurt anything ?
Im trying to avoid fixing something if it aint broke so to speak ..
Because im broke after buying parts all week ..
I know if this needs to be replaced it a son-of-a-gun as i have to
buy a Mainshaft Bearing Race Puller ..
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,196
Likes: 3,085
From: NW AR
That seal shouldn't cost much. If you're in there anyway with the inner primary off, just spend the two bucks and replace the seal. You can pull the old seal out with a screwdriver and put the new one in with a socket and a hammer. If the bearing is OK, you can leave that alone if money's tight.
If you haven't seen any oil on the inside of the primary up where the sprocket is, and you're not planning on pulling the inner primary off, then leave it alone.
If you haven't seen any oil on the inside of the primary up where the sprocket is, and you're not planning on pulling the inner primary off, then leave it alone.
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
I wouldn't use WD40 because it contains lead. Maybe some brakekleen. Then wiggle the shaft up and down a bit and you will see if any oil squeezes out. However, that said...if I take my primary apart I will replace the IPB & seal while I am in there because I have an 06 dyna and they are notorious for failing. Not rocket science and you are aready in there.
Road Warrior
Joined: Dec 2007
Posts: 1,286
Likes: 64
From: SoCal
When money is tight, I generally do what I have to do and get the rest later when the dough is there. That may mean you will have the primary off again sometime in the near future 'cause you KNOW where it's gonna start leaking next, right?
I have had my primary off so many times I could take it off and put it back on with my feet, in my sleep...well, maybe not, but it has become a routine task over the years.
I have had my primary off so many times I could take it off and put it back on with my feet, in my sleep...well, maybe not, but it has become a routine task over the years.
Thread Starter
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Cruiser
Joined: Feb 2009
Posts: 105
Likes: 0
Well good news anyway` ..
Thanks for the replys guys ..
I went out in the garage and used a half can of WD-40 on the inner primary shaft bearing anyway ... I spun the shaft around and its tight as heck so it cant be wiggled up or down at all .. Im trusting my gut that its all good to go.. I see my oil over flow hose is the cullporate of the dirty underside of the bike in general .. No leaking on the garage floor and its been settin there since Nov 2008 .. The trans is still full so that dont leak any.. I think all is good ..
Im gonna put this baby back together with the OEM clutch and primary system i just bought.. then give it a try when the snow is gone and the salt is washed off the roads.
I went out in the garage and used a half can of WD-40 on the inner primary shaft bearing anyway ... I spun the shaft around and its tight as heck so it cant be wiggled up or down at all .. Im trusting my gut that its all good to go.. I see my oil over flow hose is the cullporate of the dirty underside of the bike in general .. No leaking on the garage floor and its been settin there since Nov 2008 .. The trans is still full so that dont leak any.. I think all is good ..
Im gonna put this baby back together with the OEM clutch and primary system i just bought.. then give it a try when the snow is gone and the salt is washed off the roads.
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Thread Starter
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Cruiser
Joined: Feb 2009
Posts: 105
Likes: 0
Not taking the inner primary off .. i see no need to fit something that aint leaking yet ..
That seal shouldn't cost much. If you're in there anyway with the inner primary off, just spend the two bucks and replace the seal. You can pull the old seal out with a screwdriver and put the new one in with a socket and a hammer. If the bearing is OK, you can leave that alone if money's tight.
If you haven't seen any oil on the inside of the primary up where the sprocket is, and you're not planning on pulling the inner primary off, then leave it alone.
If you haven't seen any oil on the inside of the primary up where the sprocket is, and you're not planning on pulling the inner primary off, then leave it alone.
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