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Old 04-25-2003, 10:20 AM   #1 (permalink)
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Trunion bearing Q.

Yup, I searched for knuckle bearing and trunion bearing...

When I installed the "cup" that the trunion bearing sits in, it sticks up out of the housing about 3mm. It is the same on all 4, so I'm guessing it's OK?

It's been so long since I initially tore this thing down that I forgot what it looked like before, but I don't really trust that, either.

I guess I'm at stage V on the SO/SR/WB stretch... paranoia.
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Old 04-25-2003, 10:27 AM   #2 (permalink)
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Those look like they have less taper than the Koyo ones I have. Mine sit closer to flush with the housing...

Are those timken bearings by chance? I once tried a timken cross for the koyo and it was like that.

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Old 04-25-2003, 10:35 AM   #3 (permalink)
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90% sure they are timken.. off the top of my head.
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Old 04-25-2003, 10:43 AM   #4 (permalink)
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They don't look right. Besides the taper issue the race looks too high. Check the number. They should be 30303B and not just 30303.
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Old 04-25-2003, 10:47 AM   #5 (permalink)
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Mine also sit closer to flush with the housing, i measured an old bearing cup and it was 10.5 mm.
Brand is KOYO #TR0305A


Bad angle, but you get the idea.
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Old 04-25-2003, 12:17 PM   #6 (permalink)
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Definitely non OK--You will never get the knuckle back together.
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Old 04-25-2003, 01:32 PM   #7 (permalink)
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Rich, As others have said, it's sitting too high. Look under the cup and see if it's sitting flush against the recess in the knuckle ball. If you can see or feel a gap, no good. Go with Koyo bearings.
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Old 04-25-2003, 01:38 PM   #8 (permalink)
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Hrmmm.. They are actually SKF bearings..German made. Came with the rebuild kit I got.

Called JTO, and they mentioned that the SKF bearing race does sit up a bit higher than the Koyo's, but have never had a reported problem.

I'm still gonna pope them out and make sure there's no garbage in there preventing the race from sitting further down.

Thanks for the input.
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Old 04-25-2003, 01:39 PM   #9 (permalink)
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What no blue?



Mine sat pretty close to flush.
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Old 04-25-2003, 01:39 PM   #10 (permalink)
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Quote:
Originally posted by cruiserman
Rich, As others have said, it's sitting too high. Look under the cup and see if it's sitting flush against the recess in the knuckle ball. If you can see or feel a gap, no good. Go with Koyo bearings.
When I saw his picture, I thought "that race is not all the way in and it looks crooked." But he said all 4 were this way and I thought "nah, couldn't be all four that way." Must be wrong bearing set. So meybe its the blue paint that makes this happen.

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Old 04-25-2003, 02:32 PM   #11 (permalink)
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I don't like the look of that. There is no reason other than cost not to have the right bearing in the kit. Stock bearings fit flush with the top or below. Secondly and not least important is the height of the bearing halfs together. If that is off, shiming for center and preload will be impossible. Preload is highly important if you do not want to have your knuckle arms fall off on the road. Get it wrong and the studs will break for certain. Measure the height of the old ones and the replacements. Of course you will have to remove one cup to do that. I have seen at least 2 different types of factory OEM bearings. Overall they are the same, but if you switch cups or rollers they will be way off!!

If they are the same height as stock and you can get the knuckles over them, go ahead and use them. But keep the old ones as spares and keep the sets together!!

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Old 04-25-2003, 06:02 PM   #12 (permalink)
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Well, I pulled them all off, and it's the same. BUT, I can easily get the knuckles on.

The old ones are the same too. I won't sweat it. I think it's just this particular bearing combo. Preload WILL be checked... 5lbs...

And for the record, I'm replacing the bearings and the races...
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Old 04-25-2003, 06:27 PM   #13 (permalink)
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Like you said "I'm still gonna pope them out and make sure there's no garbage in there preventing the race from sitting further down". ditto
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Old 04-25-2003, 06:38 PM   #14 (permalink)
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Ewwww, so close to being road worthy and getting tickets for scaring wildlife with that blue paint . Should be AWESOME with a 101" wheelbase
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Old 04-26-2003, 08:54 AM   #15 (permalink)
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Quote:
Originally posted by maddog
Like you said "I'm still gonna pope them out and make sure there's no garbage in there preventing the race from sitting further down". ditto
Did that, and although they were sitting flush before, I feel better about it. as I'm wheeling/driving, I freqently have mental images of what the parts are doing, and I dont' want to worry about any of that...

If I was thin-skinned, I'd paint the axles black... But I'm not, so to all of ya's..
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Old 04-26-2003, 05:00 PM   #16 (permalink)
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Quote:
Originally posted by maddog
Like you said "I'm still gonna pope them out and make sure there's no garbage in there preventing the race from sitting further down". ditto
thats all id do, then paint the housings black and run it!!
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