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Help diagnosing a primary leak

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Old Jul 5, 2018 | 10:41 PM
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Default Help diagnosing a primary leak

I was hoping someone could give me some guidance before I tear into my primary again. I just installed some forward / floorboard controls while removing my mid controls. I also changed out the stock IP bearing and replaced it with a new Baker IPB. After my maiden voyage I have a significant primary fluid leak. Seems to be behind the primary in the area of the old mid control shifter. (the area marked with the blue tape in the pic is where the fluid seems to be dripping). I was hoping it was just the bottom of the primary cover. I re-tightened down the cover in that area but that didn't seem to help.

I didn't have any leaks prior to this installation. I used all new gaskets and seals for the install. A few things come to mind. I didn't change out the shift shaft seal. I also removed the bearing race by cutting it off with my dremel. As I made the cut in the race it kind of loosened up and walked in closer. Is it possible I damaged something there. Isn't there another seal behind there? When I replaced the stock bearing with the Baker I used the supplied seal in lieu of the harley IPB seal, are those Baker seals prone to leaking? I also found a small paper type gasket left over (pictured) It in the area where I was keeping the inner primary case. It seems to be about the same diameter as the old mid control shifter rod, so I assumed it wasn't needed. Again any thoughts would be greatly appreciated.

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Last edited by tunafisher729; Jul 5, 2018 at 10:44 PM.
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Old Jul 5, 2018 | 11:11 PM
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You need to seal that shifter shaft opening. I did mine with some generic gasket material, and cut my own circle, with no opening in the middle. Open it back up...
 
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Old Jul 5, 2018 | 11:51 PM
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My 2000 is a little bit different from yours, but I just had it open tonight... There are two bosses inside my primary that sit behind the inspection cover (where the shifter shaft exits for mids), each of which uses a gasket like the one you pictured. They can be a little bit finicky to install, as they can easily drop when installing the outer cover. I always use a liberal coating of oil to hold them in place while installing the cover. My primary would definitely leak if either of these gaskets were missing.

Again, I'm not sure what yours looks like inside, so this may not be applicable at all...

 
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Old Jul 5, 2018 | 11:52 PM
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Originally Posted by archergodwin
You need to seal that shifter shaft opening. I did mine with some generic gasket material, and cut my own circle, with no opening in the middle. Open it back up...
I thought I read somewhere that the mid control shift rod shaft was was kind of a closed off tunnel. Should I have also reused the rubber gasket that was around the old shift rod that was inserted in the back of the inner primary? (#11 below) Can I stuff the hole with something, RTV? What type of gasket material? can it be done now without having to remove the inner primary again? thanks for your help
 
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Old Jul 5, 2018 | 11:54 PM
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Is your "left over" gasket #21 in your diagram?
 
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Old Jul 5, 2018 | 11:58 PM
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Originally Posted by F86
My 2000 is a little bit different from yours, but I just had it open tonight... There are two bosses inside my primary that sit behind the inspection cover (where the shifter shaft exits for mids), each of which uses a gasket like the one you pictured. They can be a little bit finicky to install, as they can easily drop when installing the outer cover. I always use a liberal coating of oil to hold them in place while installing the cover. My primary would definitely leak if either of these gaskets were missing.

Again, I'm not sure what yours looks like inside, so this may not be applicable at all...

thanks, Can anyone confirm if there is something simliar in the 2006+ Dyna's that I might have missed. I don't recall anything from the manual.
 
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Old Jul 6, 2018 | 12:05 AM
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Originally Posted by F86
Is your "left over" gasket #21 in your diagram?
Pretty sure that's where it was. But with the mid control shaft no longer there it didn't seem like it would serve any purpose. So I understand that I should seal off that same hole right there. Is this procedure in the service manual. I don't recall seeing a section on mid - forward control swap. This step was also not addressed in the floorboard instructions.
 

Last edited by tunafisher729; Jul 6, 2018 at 12:08 AM.
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Old Jul 6, 2018 | 12:10 AM
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As I understand the diagram, #21 does seal off the hole for the shifter shaft. I think that shaft simply travels through the inner and outer halfs of the primary, and that gasket keeps oil from pouring out through the passageway. My guess is that you need to pull the cover, make sure that gasket is properly in place, close it up, and you'll probably be good to go!

...But again, I don't know the "newer" stuff as well... Good luck!
 
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Old Jul 6, 2018 | 08:29 AM
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Originally Posted by tunafisher729
Can I stuff the hole with something, RTV? What type of gasket material? can it be done now without having to remove the inner primary again? thanks for your help
I did fill the tunnel in my inner primary with high temp RTV, but I still used some base gasket material to seal off the outer primary 'tunnel'.
 
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Old Jul 6, 2018 | 06:45 PM
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Those two circled items are "towers" and use a press on "tower gasket"s , from the dealership, make the metal surface is super clean prior to pressing those gaskets on..
 
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