vent for primary??
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Tourer
Joined: Oct 2008
Posts: 360
Likes: 0
From: O'fallon, Missouri
vent for primary??
Just wondering if anyone knows of a vent available for your primary? My plug on the front of the motor coming frome the stator keeps leaking. I put some gasket sealer on it about a year ago and now its leaking around the sealer. I just got done re-sealing it this morning. I think it may be building up pressure inside. My fluid level is correct. Its a 2000 model twin cam.
Any help would be great.
Any help would be great.
Outstanding HDF Member
Joined: Aug 2007
Posts: 2,874
Likes: 8
From: Earth
primary/chaincase housing need not and should not be vented. zero pressure in primary case,UNLESS your seal on the left motor side is allowing motor oil to leak into primary. otherwise just replace stator and all is well. is that warranty?
Seasoned HDF Member
Joined: May 2008
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From: South Carolina
Primary chaincases are vented, through the hollow transmission mainshaft.
Road Warrior
Joined: Sep 2008
Posts: 1,640
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I don't see how it's vented thru the shaft. The bolt that adjusts the clutch pack threads into that shaft blocking the "hollow". There's no need to vent it as there's nothing to pressurize it.
Last edited by jamesw; Oct 31, 2009 at 05:44 PM.
Banned
Joined: Sep 2009
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From: The Internet (& Dyer, Indiana)
They leak sometimes at the plug. You can buy time with the sealer (clean real well first with brakeclean), but ultamately a new stator will be in your future. Vent not needed, and if crankcase seal is causing pressure in the primary, oil would be leaking into the primary. Your fluid level is good (you said) so you likely have no crankcase pressure problems.
Seasoned HDF Member
Joined: May 2008
Posts: 21,175
Likes: 12,747
From: South Carolina
Why do you think the gearbox is vented, nothing pressurizes that either?
I`m guessing you haven`t disassembled a transmission.
There is no bolt threaded into the end of the transmission mainshaft.
The adjuster threads into the clutch release plate.
Last edited by Dan89FLSTC; Oct 31, 2009 at 06:45 PM.
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Road Warrior
Joined: Sep 2008
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Actually, I just had my inner primary off. I looked back at my photos and the manual, and I stand corrected. The shaft is not threaded, the push rod runs thru it and pushes on the screw that threads into the release plate as you correctly stated.
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Thread Starter
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Tourer
Joined: Oct 2008
Posts: 360
Likes: 0
From: O'fallon, Missouri
They leak sometimes at the plug. You can buy time with the sealer (clean real well first with brakeclean), but ultamately a new stator will be in your future. Vent not needed, and if crankcase seal is causing pressure in the primary, oil would be leaking into the primary. Your fluid level is good (you said) so you likely have no crankcase pressure problems.