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Problem pulling rear wheel bearing

Posted: Tue Oct 29, 2019 12:44 pm
by zogthegreat
Hi everyone!

I have a 2011 Taurus SEL that has a bad rear wheel bearing. I'm trying to pull it with a slide style bearing puller, however, the silly thing isn't moving at all. I have sprayed it with penetrating oil, (PB Blaster), and heating it as best as I can with a propane torch, but it won't budge.

Does anyone have any suggestions?

Thanks!

zog

Re: Problem pulling rear wheel bearing

Posted: Thu Oct 31, 2019 11:49 am
by FordWI
I have a Ford Flex and have replaced all wheel bearings by simply cutting off two opposing lug nut bolts from the hub using a power cut-off tool. Tapping out the bolts from the hub. Then placing grade 5 bolts, nuts, and washers onto the two hub holes and cranking the bolts against the surrounding bearing surface. Alternately tightening each one until the bearing slowly comes out. I got the bolts/nuts/washers at Menards. I believe that they were 1/2"-13 size about 4 inches long. Works very well and requires no heat or pounding!

Re: Problem pulling rear wheel bearing

Posted: Thu Oct 31, 2019 12:38 pm
by zogthegreat
Hi FordWI,

Thanks for the suggestion, I will give it a try when it stop's raining where I am, (but before the snow comes!).

Re: Problem pulling rear wheel bearing

Posted: Mon Nov 04, 2019 3:18 pm
by twiggy144
Ingenious Ford WI !
I shall remember this trick, even tough I should have known: I use similar technique to remove brake discs frozen to the wheel hubs. I use the 2 holes meant for screwing the caliper brackets to the hub.

Re: Problem pulling rear wheel bearing

Posted: Mon Nov 04, 2019 3:41 pm
by FordWI
Glad it worked for you too! Someone should put a you-tube video out on this method since all of the current you-tube videos use hopeless antiquated methods (slide pullers, hammers etc.). Great idea to use similar method for brake rotors. Thanks!

Re: Problem pulling rear wheel bearing

Posted: Mon Nov 04, 2019 4:47 pm
by twiggy144
this youtube video shows it: http://www.youtube.com/watch?v=mtsTJCRljAs

Re: Problem pulling rear wheel bearing

Posted: Mon Nov 11, 2019 10:36 pm
by zogthegreat
Hi everyone!

So a bit of an update. First, I didn't beat the snow! :( However, I was able to work thru it, (not fun!).

I tried FordWI suggestion, however, it didn't work. I started by knocking out two studs with a hammer and then cutting them off with an angle grinder, (no space to just slide them out).

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(note, these pictures are of the front bearing, but I had the same problem with the rear).

Finding grade 5 or 8 nuts and blots seems to be difficult where I'm living, however a nearby machine shop had a length of grade 5 threaded rod and nuts. I ran them thru per FordWI's recommendation:

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Tightening the nuts didn't work, so I went at the spindle with a propane torch and when that didn't work, I switched to MAP:

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When that didn't work, I pulled the entire spindle and took it to a machine shop. 483 foot pounds of pressure later, the bearing popped out:

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As you can see, there was a LOT of salt corrosion. I went at the bearing mount with a wire brush on a drill and removed all of the built up corrosion, (the pic is from when I was half done, you can see how thick the built up corrosion was):

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Even though I don't think that I will ever change the bearings on this car again, (my Taurus is getting old for this environment), and I installed genuine Motorcraft bearings, I coated the new bearing and the mount on the spindle with anti-seize paste. It probably was a waste of time, but even with Motorcraft parts, you never know.

The gentleman at the machine shop told me that he does pops bearings like this regularly. They use so much salt on the roads up here in Quebec that the bearings are essentially welded in place by the salt corrosion. I grew up in Arizona, where nothing ever rust, so this has been a learning experience for me.

If your having a similar problem pulling a bearing and you have tried everything that you can think of, you might have to do it like I did and pull the spindle.

Or be smart and live in a place like southern Arizona where you will never have this problem!

Or have to work on our car in the snow and cold... y'all northerners are freaks for choosing to live in places like this! ;)

A big thanks to everyone for their advice!

zog

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 9:45 am
by twiggy144
I was going to ask where you live. In La belle province of Québec ! No wonder no parts on the car wants to come off easily. I share your feelings.

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 9:56 am
by zogthegreat
twiggy144 wrote:
Tue Nov 12, 2019 9:45 am
I was going to ask where you live. In La belle province of Québec ! No wonder no parts on the car wants to come off easily. I share your feelings.
LOL, yeah, I'm an English pig-dog living in the land of Francophone's! Your in Montreal ausi?

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 10:11 am
by twiggy144
On a side note, I am surprised forcing 2 bolts against the hub did not pull the bearing out.

Given the following data:

thread pitch of the bolt: 1/16 inch
length of the wrench: 6 inch

each turn of a wrench multiplies the force onto the bolt by a factor of 603:
( 2 x 6 in x 3.1416) / (1/16 in) = 603

So a weight of 50 lbs applied on the wrench translates to a push of 50 x 603 = 30159 lbs on the bolt.
You got to make sure the threads on the bolt are well lubricated tough to convert the torque of the wrench to a push force, otherwise you are torquing against the friction between the nut and the bolt.

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 10:26 am
by FordWI
Nice torque/force analysis. This method worked very well for me. I did use washers and grease to improve method. I used a long wrench to alternately crank on each nut and it s-l-o-w-l-y loosened and backed out. Being in Wisconsin (with high salt use on interstate highways) my corrosion was almost as bad as the Canadian post. Note: the bolts did press into the housing over 1/8" from the extreme force.

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 11:24 am
by twiggy144
I would like to add, given that actually only 15% of the tightning torque is applied on the bolt for either pushing or clamping, it still leaves 15% x 30159 lbs of push = 4523 lbs of push.

quote: " Typically only 10% to 15% of the overall torque is actually used to tighten the bolt, the rest is used to overcome friction in the threads and on the contact face that is being rotated (nut face or bolt head). "

ref: https://www.boltscience.com/pages/nutor ... tening.htm

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 1:45 pm
by zogthegreat
(chuckle) I never argue with math! However, I stopped tightening the bolts when I saw that they were starting to damage the aluminum on the spindle.

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 1:53 pm
by FordWI
Thanks for your update, which now makes complete sense since I drove the bolts right into the spindle about an 1/8" or so in order for the bearing to loosen and start to pull-out. Spindle is marred but still functional.

Re: Problem pulling rear wheel bearing

Posted: Tue Nov 12, 2019 7:17 pm
by zogthegreat
@twiggy144

BTW, my son just sent me this link for a DIY garage in Mtl Nord:

https://www.garage7jours.com/

It would have been really convenient to know about this place before I started working on my car! I drove by there today. The place seems decent, with about 15 lifts for $10 per hour. You can also rent tools there if you don't have your own.

BTW, I'm actually up in Val-David, hence me working in the snow before it hit the city.

Re: Problem pulling rear wheel bearing

Posted: Wed Nov 13, 2019 8:06 am
by twiggy144
This place also rents stalls with lifts : location garage et lift 8024 rue Léonard de vinci 514-836-1829

http://mongaragemtl.com/
Went last year to lift the car and flush ATF fom my 2002 Sorento. Convenient. But this of off-topic. The moderators will slap my hand :-)