Stator / Rotar. ? Advice
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Joined: May 2012
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From: Ohio
IPB question
Since I all ready have inner primary off. How should the ipb look? The race didnt look like it had walked. And not tore up. The bearing appear ok, but they seem to be loose and move around some. Is that normal or should they be fairly tight. Thanks
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From: Detroit
Mine had obvious visual deterioration, but a lot of deterioration can happen before anything is available visually to the naked eye, like "work hardening" and embrittlement of the metal.
Last edited by Warp Factor; Aug 13, 2013 at 04:20 PM.
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From: Honah Lee
I agree with Warp if it was me. Once you remove the seal and snap ring it comes out fairly easily. You really need to replace the inner race unless you mic it carefully with an out side micrometer that measures in 0.0001. No dial caliper here. You need to make sure it is not worn and ROUND. You can pick up the true size in an area not touched by bearing. If you replace inner race, it can be grooved and cracked off. But you need the tool to press it on. Do not hammer it on.
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Joined: Feb 2013
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From: Dallas, Texas
Take the connector apart. The wires pull through very easy. Use some RTV to seal it up to keep your primary oil in. Did the inner primary cover AND bearing along with a new stator, My left me and my Wife stranded in the middle of BFT. Make sure you use a new primary gasket.
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From: Ohio
New stator & 1 part rotor are installed. Guess I will take the advice to go ahead and change IPB. I think its ok but ordered one from baker this morning after emailing them. They told me hd changed the shaft size , mid 07 model year. I hope they ship it quickly, I was going to hold off on ipb till this winter, i'm in Ohio so not much riding weather left, but since it is apart and the bearing is close to the milage the last one went out, plus more gaskets, primary bolts etc. guess a few more days may be worth it in the long run.
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From: Detroit
Ripsaw, from your posts in various inner primary bearing threads, you seem to know a lot about bearings, transmissions etc.
Do you have any conclusions or guesses so far about the cause of the 2006 issue, and also about what seems to be a high failure rate overall on various years?
Some people have mentioned that the ratcheting tensioner might be a contributor, but it looks a little wimpy to apply much force, compared to the loads from the engine. And people have reached in with the derby cover off and felt some slack, but didn't mention if that was with the engine warm or cold. If the tensioner took up slack when things are cold, maybe there's enough expansion in the aluminum engine and transmission cases to make it overly tight when things heat up?
Transmission output shaft bearings seem to hold up OK, and they're under a lot more load, so what's up with the inner primary bearing?
Do you have any conclusions or guesses so far about the cause of the 2006 issue, and also about what seems to be a high failure rate overall on various years?
Some people have mentioned that the ratcheting tensioner might be a contributor, but it looks a little wimpy to apply much force, compared to the loads from the engine. And people have reached in with the derby cover off and felt some slack, but didn't mention if that was with the engine warm or cold. If the tensioner took up slack when things are cold, maybe there's enough expansion in the aluminum engine and transmission cases to make it overly tight when things heat up?
Transmission output shaft bearings seem to hold up OK, and they're under a lot more load, so what's up with the inner primary bearing?
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,310
Likes: 6,328
From: Honah Lee
Ripsaw, from your posts in various inner primary bearing threads, you seem to know a lot about bearings, transmissions etc.
Do you have any conclusions or guesses so far about the cause of the 2006 issue, and also about what seems to be a high failure rate overall on various years?
Some people have mentioned that the ratcheting tensioner might be a contributor, but it looks a little wimpy to apply much force, compared to the loads from the engine. And people have reached in with the derby cover off and felt some slack, but didn't mention if that was with the engine warm or cold. If the tensioner took up slack when things are cold, maybe there's enough expansion in the aluminum engine and transmission cases to make it overly tight when things heat up?
Transmission output shaft bearings seem to hold up OK, and they're under a lot more load, so what's up with the inner primary bearing?
Do you have any conclusions or guesses so far about the cause of the 2006 issue, and also about what seems to be a high failure rate overall on various years?
Some people have mentioned that the ratcheting tensioner might be a contributor, but it looks a little wimpy to apply much force, compared to the loads from the engine. And people have reached in with the derby cover off and felt some slack, but didn't mention if that was with the engine warm or cold. If the tensioner took up slack when things are cold, maybe there's enough expansion in the aluminum engine and transmission cases to make it overly tight when things heat up?
Transmission output shaft bearings seem to hold up OK, and they're under a lot more load, so what's up with the inner primary bearing?
Last edited by Jackie Paper; Aug 14, 2013 at 02:41 PM.
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