RogerL
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| posted on 28/11/12 at 06:49 PM |
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Sierra rear hubs Wobbly ? Am I missing a bearing ?
Advice needed
I have a MNR VortX with Seirra rear hubs. There seems to be excessive sideways movement of the rear wheel even when on the ground. It seems kind of
squirrely when driving.
I can move the edge of the wheel about 12 mm in and out by pulling on the rear wheel with my hand.
Is this normal or am I missing something in the bearing assembly ? The nut on the end flange is tight.
Any ideas would be appreciated. Near the end of a long build process. Can't wait to go faster and faster....
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big_l
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| posted on 28/11/12 at 06:52 PM |
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Is the top camber adjuster tight !!
There obviously should be no play in the bearing it's self ..
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Check out my blog  mnrvortxhayabusa@blogspot.com
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RogerL
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| posted on 28/11/12 at 07:19 PM |
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Whobbly hub cont.
Thanks for the reply.
All the connections between the hub carrier and the wishbones are rock solid.
All the movement is between the axle and the hub carrier.
I think I need a drawing of the hub bearing assembly.
Looks like I will have to take it apart and investigate.
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macc man
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| posted on 28/11/12 at 08:07 PM |
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Have you checked the large driveshaft nut. It should be very tight. Note one is rh thread & other is left. Could be a collapsed bearing from your
description.
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ElmrPhD
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| posted on 7/1/13 at 10:41 PM |
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Hey RogerL,
Did you ever find a solution?
I'm early in my Vortx build and am wondering about details/protocol for those 2 massive nuts (no, not THOSE 2...).
Seems like they are to be torqued to some un-godly number like 250 ft-lbs or so. Did you find out?
Take care,
Steve, in the NLs
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RogerL
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| posted on 7/1/13 at 11:27 PM |
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Wobbly Hubs Fixed
I meant to post a reply earlier, caught up in the holidays.
The inner bearing was installed with the taper facing the wrong way so tightening the nut did not make the assembly tight.
Once I turned the inner bearing around the wheel was nice and tight. I had a 2 ft breaker bar on the nut. It did not seem to require super strength
to get it tight enough to get the wheel tight.
Happiness is a tight rear end.
It drives great now. No rubbing or squirely motion. And FAST I will post a driving video soon. Next is registration to drive on the street and
get a trailer to take it to the race track.
Finally done.... WOW.... Now it is worth the nights in the garage.
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ElmrPhD
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| posted on 7/1/13 at 11:29 PM |
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Congratulations!!!
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Bluemoon
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| posted on 8/1/13 at 11:14 AM |
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quote:
Originally posted by RogerL
Once I turned the inner bearing around the wheel was nice and tight. I had a 2 ft breaker bar on the nut. It did not seem to require super strength
to get it tight enough to get the wheel tight.
Might be worth getting a garage to torque them up correctly? The nuts don't set the bearing preload (this is set by the dimensions of the parts
I think) ... but the torque will set how tight the nuts are i.e. stopping them coming undone.
Dan
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adithorp
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| posted on 8/1/13 at 01:28 PM |
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quote:
Originally posted by Bluemoon
quote:
Originally posted by RogerL
Once I turned the inner bearing around the wheel was nice and tight. I had a 2 ft breaker bar on the nut. It did not seem to require super strength
to get it tight enough to get the wheel tight.
Might be worth getting a garage to torque them up correctly? The nuts don't set the bearing preload (this is set by the dimensions of the parts
I think) ... but the torque will set how tight the nuts are i.e. stopping them coming undone.
Dan
Agreed. Get it torqued up.They should be VERY tight and a 2 foot breaker bar won't do it.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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RogerL
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| posted on 16/1/13 at 04:20 AM |
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Rear end more tight.
Thanks for the advice. This forum has enabled a beginning builder to have success.
A borrowed my friends big torque wrench and used a long pipe for more leverage. The trick is to keep the car from moving.
Working alone. Nobody to put their foot on the brake.
Next is getting a trailer so I can tow it for inspections to get registered in CA.
My neighbors are going to get the cops on me for driving on my street without license on the car.
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