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Primary/Transmission/Driveline/Clutch Find answers to general powertrain, primary and transmission. Have clutch issues and need suggestions? Post them here.
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  #1  
Old 05-20-2012, 08:32 PM
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Default Inner Primary bearing change ?

I have a inner primary seal leaking and i thought i read somewhere through this vast website about a updated one piece bearing being installed for the inner race walking on the shaft. my question is, what years and models does that apply to ? would my 07 FB need a updated bearing or is it just a seal gone bad ?


TIA..
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Old 05-21-2012, 09:39 AM
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Quote:
Originally Posted by FroggyFatBoy View Post
I have a inner primary seal leaking and i thought i read somewhere through this vast website about a updated one piece bearing being installed for the inner race walking on the shaft. my question is, what years and models does that apply to ? would my 07 FB need a updated bearing or is it just a seal gone bad ? TIA..
If you are going in to replace the inner primary seal, you really should replace the inner primary bearing, 5th gear/mainshaft seal, quad seal and spacer and mainshaft seal. Can't tell you how many guys have had the inner primary on/off multiple times chasing an inner primary leak. There are three fixes for the inner primary bearing:

1. replace bearing race & bearing with HD oem set.
2. replace bearing with HD oem & replace race with non-walking S&S race.
3. replace separate bearing & race with one-piece sealed bearing/race upgrade from All Balls or Baker.

Option #2 is my personal favorite. I can't speak from experience but have read that there have been issues with the one piece sealed bearings; hit/miss solution from what I hear and read.

It is very easy to nick the inner primary bearing seal when installing; the splines on the mainshaft have very sharp edges. The inner primary bearing puller shaft comes with a plastic netting to protect the threads, I slip that over the mainshaft to protect the seal when installing the innner primary case; duct tape works as well.

Last edited by djl; 05-21-2012 at 02:25 PM..
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Old 05-21-2012, 10:26 AM
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djl is exactly right, I am one of those guys that has had the primary off more than a couple of times chasing a leak...since you have it apart, replace everything! ;-)
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Old 05-21-2012, 08:25 PM
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does my 07 have the style bearing where the inner race is seperate ? looking at the parts fiche it looks to have the inner race as part of the bearing assy..

what is the "quad seal" ? i read where guys were removing the inner seal portion of the sealed bearing to allow the oil to run back out of the bearing and to keep it lubricated..


oh, i know for sure its the primary leaking. i put dye in the trans oil and the oil leaking doesn't have dye in it. luckily its not a bad leak.. just enough to mark its territory after a run..


http://partsfinder.onlinemicrofiche....N-CASE-HOUSING
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Old 05-22-2012, 07:42 AM
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The Quad seal is a small o-ring that goes in next to the Transmission mainshaft bearing under the main seal. Your leak sounds like the inner primary seal...fairly easy to change....
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Old 05-22-2012, 07:44 AM
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and your main tranny bearing is a one piece bearing but its not a sealed bearing from the factory.... The bearing (#6) in the picture is the inner primary bearing which is a 2 piece roller bearing, the race has to be pressed on the mainshaft.

Last edited by Paint; 05-22-2012 at 07:54 AM..
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Old 05-22-2012, 07:54 AM
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baker kit:http://bakerdrivetrain.com/high-torque-bearing-kit
At work I have the part # for the Napa equivilent.
Bearing is a # SKF 6205-2ZJ Seal is #25x52x7TC made by TCM. Identical to the Baker set.
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Last edited by soft 02; 05-22-2012 at 09:35 AM..
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Old 05-22-2012, 07:29 PM
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i gotta a napa two doors up from where i work.. i know where i'm going tomorrow !


thanks for the info and help.. since its been raining and looks to continue to rain for the next few days i was gonna tear it apart tonight, but i've been dealing with a splitting headache all day.. my heads gotta be into it to tear somethig apart i've never had apart.


thanks again guys..
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Old 05-22-2012, 07:38 PM
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one more question.. sorry guys..

to use the bearing and seal above, do i remove the inner race # 14 in this pic. or is that for the shell needle bearing #4


http://partsfinder.onlinemicrofiche....N-CASE-HOUSING


I do have the service manual, but sometimes its easier to look at a parts layout in determing component assembly and parts order. i wished they showed the trans shaft with the primary case also. i'm sure once i get it apart i'll see what you all are describing.. and say ... "I see said the blind man"
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Old 05-22-2012, 07:41 PM
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Quote:
Originally Posted by FroggyFatBoy View Post
one more question.. sorry guys..

to use the bearing and seal above, do i remove the inner race # 14 in this pic. or is that for the shell needle bearing #4


http://partsfinder.onlinemicrofiche....N-CASE-HOUSING


I do have the service manual, but sometimes its easier to look at a parts layout in determing component assembly and parts order. i wished they showed the trans shaft with the primary case also. i'm sure once i get it apart i'll see what you all are describing.. and say ... "I see said the blind man"
Yes. Once you have removed the primary assy you can take a dremmel or a 4" grinder to the inner race (item #14 in trans gears) and carefully remove enough material so when you strike it with a chissle it splits and comes off easily.
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Last edited by soft 02; 05-22-2012 at 07:44 PM..
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Old 05-22-2012, 07:41 PM
 
 
 
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bearing, bearings, change, davidson, diagram, harley, heritage, primary, replace, sealed


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