By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Bearing Extraction

All Topics | Latest Posts

Search for:  in Thread Title in  
Stub Mandrel30/06/2010 20:47:05
avatar
4318 forum posts
291 photos
1 articles
OK This is a bit sneaky...perhaps we should have another 'general workshop issues' topic?
 
I have to change a front wheel bearing on a 1987 renault Trafic There's about 1.5mm(!) play at the bearing and you can feel that at least some of the balls are less than spherical. No such thing as a Haynes manual  for this vehicle
 
I've finally got the hub and 'carrier' off, thanks to stud extractors etc. but I'm stumped at how to pull the bearings. I reckon that anything I bodge with 1" angle and 10mm studding is going to be too flimsy.
 
I'm even considering getting the bearing then finding an engineering firm to swap teh bearings over.
 
Does anyone have any advice ?
 
Thanks

Neil
Gordon W01/07/2010 09:26:07
2011 forum posts
Not familiar with your motor, but in general, modern expensive stuff is worth paying local garage to press out and replace. Some require all the hub + bearing as an assembly replaced. I usually wack em out with big hammer, if outer ring stays in, weld a piece of scrap inside, then will usually drop out ,or hit that.
KWIL01/07/2010 09:28:01
3681 forum posts
70 photos
Hydraulic puller or press tool is MUCH more kind to the pieces you do want to keep.
Frank Dolman01/07/2010 11:44:08
106 forum posts

     Unable to get puller jaws under a race, I had success with cutting one
   off with a cutting disc in a hand-held drill.  A nice neat cut down a radius
   was not possible, so I cut in an odd direction that I could "get at" so that
   I had some sort of control.  When the cut was as deep as I felt I could
   safely go, I whacked a wedge into the cut.  The race broke at the bottom
   of my cut, leaving me to lift it off between finger and thumb.
 
     Idea useless if you can't get a disc at the stuck bit of race.
 
                        Sincere wishes
Gordon W01/07/2010 14:46:04
2011 forum posts
Frank, Assuming you mean bearing inner stuck on shaft :-find disc with hole slightly bigger than bearing, weld to bearing, bearing expands and drops off, or at least you've something to hit. NB protect shaft etc. from spatter. Failing that they will often shatter if hit smartly. Eye protection etc.
LADmachining01/07/2010 19:02:14
avatar
126 forum posts
11 photos
So is the bearing still complete within the suspension leg/hub carrier? 
 
Easiest way is to find a local garage with a hydraulic press and give the bloke who does it something for his trouble....
 
Much quicker, less chance of damage, but less fun!
Weary01/07/2010 19:26:12
421 forum posts
1 photos
Have you tried this Renault forum?
 
It is pretty extensive, and although it has no specific Trafic section it is searchable, and I guess many parts are similar thoroughout the product range.
 
They suggest taking wheel to dealer for a clio bearing removal as it needed about 7 tons press to get the bearing to move, probably similar to your arrangement.
 
If you 'google'      Renault trafic forum      there appear to be a couple of model specific fora out there. 
 
Regards,
 
Phil
 
Richard Parsons02/07/2010 07:30:54
avatar
645 forum posts
33 photos
Front wheel bearings are usually pushed in from opposite sides. Once you have the axel out of the hub and the hub off the car, have a feel around inside the hub. If there is a distance piece (which is often used if you have tangential ball bearings) between the bearings you will have to knock the centre out of one bearing to get the distance piece out out. Inside the casting you should find two or three groves cast into the housing. These allow you to get a ‘drift’ at the race ‘outer’. Using a good quality drift, a good hammer and a suitable support drift the bearing out by punching into each groove one after the other. This is to ensure that the bearing does not ‘gripe’.  To need a 7 ton press to shift a bearing myst show that the hub is under a very high stress.  Good Luck.
 
Stub Mandrel10/07/2010 21:19:53
avatar
4318 forum posts
291 photos
1 articles
Hi Everyone,
 
My apologies for askinga question and taking so long to reply. i only got to start on the job today, along with a few other bits and pieces.
 
Thanks for all the advice; it's a double race bearing, rather than two with a spacer. Pulling the hub from the bearing caused the two inner races to separate from the outer, leaving one inner race on the hub and the outer in the carrier.
 
Yes, I found the forums. Not much specific stuff, but it seems you need something like a 10 ton press No wonder my home made puller bent under the strain of trying to extract teh outer race! Perhaps owners of french vans are less into DIY - I find the Vauxhall forums really good.
 
I've used a cut off wheel to get a washing machine race off, but this is a seriously BIG race and I'm worried about scoring the carrier and creating a stress raiser. Too big to try cracking it off, I think.
 
I like the welding idea, but I'm a real beginner at welding and I don't want to screw up.
 
So.. I'm raising the white flag as I've found someone who has said they can do it for £20.
 
Thanks again for the ideas; I'll file them for reference for when I tackle something smaller than two rows of 5/8" balls(!)
 
Neil
 

Stub Mandrel14/07/2010 08:43:52
avatar
4318 forum posts
291 photos
1 articles
The garage got it out for me - turns out there was a sprung C-ring hidden in the rust so there was no way i was going to press it out!
 
They had to snap the end off the   C-ring, and there wasn'rt a re[placement with the bearing, so I brazed a bit of 3mm stell on to match the tab at the other end of the ring.
 
Job done now, phew!
 
Neil
PS: Where has the cursor gone?

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Shopping Partners
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate