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Author Topic: tapered roller bearings  (Read 1137 times)

zahc

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tapered roller bearings
« on: June 12, 2014, 06:56:23 PM »
My truck has adjustable tapered roller bearings. There is a small amount of play if I grab the wheel and rock it. However if I move the castle nut to the next notch, then there is no play at all.  I'm worried that would be too tight and overheat or damage the bearings. Is a little play ok?
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Tallpine

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Re: tapered roller bearings
« Reply #1 on: June 12, 2014, 07:21:08 PM »
I was always taught that there should be no play.

It's not going to get tighter as it wears.
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mtnbkr

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Re: Re: Re: tapered roller bearings
« Reply #2 on: June 12, 2014, 07:26:49 PM »
Quote
It's not going to get tighter as it wears.

That's what she said.

Chris
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onions!

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Re: tapered roller bearings
« Reply #3 on: June 12, 2014, 07:53:44 PM »
Are these new bearings?No play with new ones-they will wear in.Don't crank them down though.

An easy test is to drive the vehicle a couple of blocks and put your hand on the hub.If it's warmer than the wheel then they're too tight.

A little play is a.o.k.
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dogmush

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Re: tapered roller bearings
« Reply #4 on: June 12, 2014, 08:42:32 PM »
Play in the wheel enough that you can rock it is no good. There's a pre - load spec on tapered bearings. If these are new, pre-load them to spec. If these are old bearings that have worn to the point there is play in the wheel, change them. Bearings are pretty cheap.

If you give me a make and model, I can probably get the pre load procedure.
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onions!

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Re: tapered roller bearings
« Reply #5 on: June 12, 2014, 09:48:36 PM »
Quote from: dogmush on June 12, 2014, 08:42:32 PM
Play in the wheel enough that you can rock it is no good.

Hang on now.This changes if the wheel is in the air or on the ground.A worn ball joint or even steering linkage can also make things feel like their loose,depending on how the testing is being accomplished. 
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jeff w

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dogmush

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Re: tapered roller bearings
« Reply #6 on: June 13, 2014, 05:09:35 AM »
True. I'I'm assuming when Zaha said bearing play he meant it.
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zahc

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Re: tapered roller bearings
« Reply #7 on: June 13, 2014, 07:19:35 AM »
It's bearing play. The the castle nut only has 8 notches in it. To get the next one I have to use a crescent wrench and crank uncomfortably.  I seem to remember semi truck bearings that have a spec for play and there is a surprising amount that is allowed. Not sure that applies to a 1996 tahoe.
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bedlamite

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Re: tapered roller bearings
« Reply #8 on: June 13, 2014, 08:40:46 AM »
Switch the nuts from left to right. They might have the threads started in a different spot.
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tokugawa

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Re: tapered roller bearings
« Reply #9 on: June 13, 2014, 09:08:41 AM »
If you crank hard on the nut to get to the next notch, you will likely  burn up your bearing. Better a little loose than too tight.  It is not going to get looser as it warms up......

 At least this is what I was taught- by an obsessive aircraft mechanic......

 Wheel bearing replacement and adjust is a common procedure, do a web search
 
 
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Tallpine

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Re: tapered roller bearings
« Reply #10 on: June 13, 2014, 10:31:51 AM »
Quote from: tokugawa on June 13, 2014, 09:08:41 AM
Wheel bearing replacement and adjust is a common procedure, do a web search 

It's one of those things that I just sort of learned to do by feel - way back when only spiders had webs  =|
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onions!

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Re: tapered roller bearings
« Reply #11 on: June 13, 2014, 10:34:09 AM »
Quote from: Grumpy Old Man on June 13, 2014, 10:31:51 AM
It's one of those things that I just sort of learned to do by feel - way back when only spiders had webs  =|

What about the cobs?
 =)
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jeff w

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dogmush

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Re: tapered roller bearings
« Reply #12 on: June 13, 2014, 10:38:12 AM »
Quote from: zahc on June 13, 2014, 07:19:35 AM
It's bearing play. The the castle nut only has 8 notches in it. To get the next one I have to use a crescent wrench and crank uncomfortably.  I seem to remember semi truck bearings that have a spec for play and there is a surprising amount that is allowed. Not sure that applies to a 1996 tahoe.

So the old bearings wore to this point?

Put new bearings in it.  Seriously, they are cheap and pretty easy to do. If you do it early enough you might save the races.
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Doggy Daddy

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Re: tapered roller bearings
« Reply #13 on: June 13, 2014, 10:39:21 AM »
Quote from: onions! on June 13, 2014, 10:34:09 AM
What about the cobs?
 =)

Used them all in the outhouse.
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