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Old 08-11-2003, 12:07 AM   #1
Peaty
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Arrow Rear Wheel Bearing TSB 03-50-02

http://www.endwrench.com/current/Cur...s/03-50-02.pdf

My guess is that's WTLW but I thought I'd post it here anyway in the event someone missed it.

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Old 08-11-2003, 12:11 AM   #2
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Hi Peaty and bump !


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Old 08-11-2003, 04:15 PM   #3
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Default Wheel bearings

Hi-ya!
I see that there are many postings concerning wheel bearings. I'd like to add another to the long list.
I have a 98 Outback Sport. I love it but I'm tired of the "off balanced washing machine" or "rocks in a cement tumbler" sound from my rear. I've replaced both of the rear wheel bearings at 25k 49k and now again at 73k. Besides making sure the techs pack the darn things with grease, is there anything else I can do? Upgrade? Purchase another company's bearings? Or should I just bring it in every 20k for a bearing change?
Also, does anyone think the suggestion that a 4 wheel alignment be done after the bearings are reinstalled makes sense? I can't seem to get enough info from my tech guy.
Thanks for letting me piggy back your posting =)
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Old 08-11-2003, 04:36 PM   #4
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What happens is if you install them wrong you distort the hub or something that holds the bearing. Then every new bearing you install after that is messed up and will not last very long.
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Old 08-11-2003, 07:08 PM   #5
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The other thing that happens far too frequently with independent repair shops (and sometimes Subaru shops ) is that the installer assumes the light packing grease in the bearing is a prepacked bearing, which simply isn't the case. Bearings installed that aren't cleaned and packed don't last very long either .


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Old 08-11-2003, 09:57 PM   #6
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Quote:
Originally posted by North Ursalia
The other thing that happens far too frequently with independent repair shops (and sometimes Subaru shops ) is that the installer assumes the light packing grease in the bearing is a prepacked bearing, which simply isn't the case. Bearings installed that aren't cleaned and packed don't last very long either .
Hopefully, repair shops (including Subaru dealerships) will ignore the advice offered above and instead follow the instructions found in the cited TSB:
Quote:
The new genuine Subaru rear wheel bearings are not to be packed with grease of any kind. The bearing is ready to install out of the box.
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Old 08-11-2003, 10:22 PM   #7
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The TSB is pretty new and they just changed the procedure. Mostly because what Brian described happened too often. People would not repack when they were supposed to

Look here:

http://www.endwrench.com/pdf/drivetr...nsiderInfo.pdf

The first paragraph talks about the bearing issue. How the housing can get deformed and cause failures also about repacking the bearing because the grease they come is not the proper stuff.
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Old 08-11-2003, 11:01 PM   #8
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Quote:
Originally posted by Jon [in CT]
Hopefully, repair shops (including Subaru dealerships) will ignore the advice offered above and instead follow the instructions found in the cited TSB:
If you actually worked in a Subaru shop (as I do) instead of just taking what Subaru prints as verbatim, you would see the bearings come in with light packing grease, not bearing grease, and see for yourself the need for repacking. Plug come pregapped and don't ever need to gapped too, right ? I can take photos if you are in need of them . In a perfect world, Subaru publications would be correct all the time, but in the real world, things are not always so rosey, and Subaru updates their proceedures more often than many people change their socks .


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Old 08-12-2003, 10:27 AM   #9
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Okay, besides packing with grease, or not packing, would a 4 wheel alignment help?
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Old 08-12-2003, 10:36 AM   #10
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Quote:
Originally posted by North Ursalia
I can take photos if you are in need of them .
Great. How about some pix of part number 28016AA030?
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Old 03-04-2004, 04:37 PM   #11
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Bump for photos of the new bearing? It seems I'll be facing a bearing replacement under a warranty from an indepenant shop, and I'd like to furnish the best information I can so that it lasts more than 10k this time.
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Old 03-04-2004, 05:58 PM   #12
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They don't look physically any different from the outside. A photo isn't going to help your shop. Just get 28015AA050, 28015AA100, 28015AA110, and 28016AA030 if it's a rear bearing and 28015AA021, 28015AA071, and 28016AA011NT if it's a front bearing. Make sure you remind them to repack the bearings before installing.


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Old 03-04-2004, 06:47 PM   #13
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Definately Re-pack those bearings. Ignore what SOA says. Every bearing that we repack has never failed. Yet when we do get a repeat failure it always has the original grease in it. Coincedence??
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Old 03-04-2004, 09:12 PM   #14
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I think not



(I know you were waiting for it )


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Old 03-04-2004, 09:29 PM   #15
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Quote:
Originally posted by North Ursalia
I think not



(I know you were waiting for it )


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Old 03-05-2004, 09:04 AM   #16
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Quote:
Originally posted by hondaslayer
Definately Re-pack those bearings. Ignore what SOA says. Every bearing that we repack has never failed. Yet when we do get a repeat failure it always has the original grease in it. Coincedence??
I love it when dealer parts counter guys and service techs decide they know better than the factory engineers.

In addition to TSB 03-50-02 New Procedure for Replacing Rear Wheel Bearings, which explicitly warns that grease should not be added to the new tapered roller bearings, SOA also issued a new version of the booklet Wheel Bearing Installation Guide. It is MSA5TT0201 and can be downloaded from http://www.endwrench.com/current/Cur...MSA5TT0201.pdf. On page 9 of that Installation Guide, there is this warning in bold:

Last edited by Jon [in CT]; 03-05-2004 at 09:34 AM.
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Old 03-05-2004, 09:20 AM   #17
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Yeah, seeing that in every subaru document I could find is what made me want to make sure these repacking suggestions were up to date. A statement like hondaslayer makes carries a nontrivial emperical factor, though (at least in keeping with as broad and thorough as one believes his data sample to be.). I'd be interested to hear it repeated or not by people from other shops.

Also, what kind of grease are you guys using to repack? I'm only about 80% through my searching here, but so far I see only a lot of "most expensive synthetic you can buy" and "neo". Need it really be some exotic neo/motul/amsoil/redline stuff, or would something from the local rice department store be a reasonable choice?

(What's wrong with the subaru grease anyway? Is it categorically insufficient by virtue of being nonsynthetic? Is it a temperature thing?)
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Old 03-05-2004, 11:05 AM   #18
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Quote:
Originally posted by Jon [in CT]
I love it when dealer parts counter guys and service techs decide they know better than the factory engineers.
Uh huh. And I love it when people with no real-world experience with these items plays Monday morning quarterback to apparently make themselves feel better or more superior- I really can't understand your motivations sometimes Jon . You can read books and press releases all day, but when it comes right down to it, if you don't repack the bearing, it will fail.


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Old 03-05-2004, 11:15 AM   #19
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Quote:
Originally posted by North Ursalia
... but when it comes right down to it, if you don't repack the bearing, it will fail.
Why don't you just call the Subaru Tech Line and see whether you can get them to confirm that their most recent wheel bearing documents are flat out wrong?

Let us know what they tell you.
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Old 03-05-2004, 11:23 AM   #20
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Not to get off topic here, but does anybody have anything to say about what one should be looking for in a replacement grease (and why, if there remains any interest in an illuminating discussion)?
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Old 03-05-2004, 12:39 PM   #21
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Quote:
Originally posted by clyde
Not to get off topic here, but does anybody have anything to say about what one should be looking for in a replacement grease (and why, if there remains any interest in an illuminating discussion)?
If you're still messing with the old style rear bearings, then Subaru specifies Shell 6459N grease.

However, if you're installing the new style rear bearings described in TSB 03-50-02, you'll loose your Subaru Genuine Replacement Parts Warranty (1 year) if you fail to follow the procedure defined in the new Wheel Bearing Installation Guide, MSA5FF0201. As noted above, that Guide warns "Do not add any grease to the bearing."

Also, SOA has required since Jan 2, 2003 that all rear bearing warranty replacements be performed using the procedure defined in MSA5TT0201. If I were North Ursalia or hondaslayer, I wouldn't be advertising that my dealership's service department was willfully ignoring that installation procedure. SOA might just decide to un-reimburse the dealership for those repairs.
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Old 03-05-2004, 10:53 PM   #22
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Quote:
Originally posted by Jon [in CT]
Why don't you just call the Subaru Tech Line and see whether you can get them to confirm that their most recent wheel bearing documents are flat out wrong?

Let us know what they tell you.
Jon,

If you have evre called SOA techlines you would realize that they are damned near useless. When I have trouble I call my local SOA teacher. He can always get me out of a jam,and 99% of the time he will say something completely opposite of techlines. And guess which is usually right? Book? Or real world experience?


"I'll take real world for $500 Alex"
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Old 09-30-2005, 12:24 PM   #23
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Do you have a link to a good "how to" directions (like the one stated above) on how to replace the front bearing? I'm about to replace mine next weekend.
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Old 09-30-2005, 01:33 PM   #24
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***popcorn**
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Old 09-30-2005, 01:41 PM   #25
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Quote:
Originally Posted by GotWRX03
Do you have a link to a good "how to" directions (like the one stated above) on how to replace the front bearing? I'm about to replace mine next weekend.
You could try searching around endwrench there might be something else

www.endwrench.com
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