need to do a front wheel bearing on my polo..at home with average tool kit
i know how to do it and whats req etc...excpet ive struggled in the past to get the inner race from the hub part
any suggestions on how to diy it...dont mind maybe purchasing a cheap puller if it will sort it
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inner race removal, you could buy ( if you dont have a cheap angle grinder or disc cutter) and gently grind doen the inner race, once it get thin it normally splits & comes off before you have to grind all the way!. Dont forget saftey googles.
When you clean the hub up put it in the freezer & put a little warmth into the bearings to help reasembly
Doc
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yeah thats how id planned to do it...will a sanding pad do it?
any other options?
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any other options?
yes----- take hub to a local garage for extraction of old and replacement of new
with regards the heating of the bearing and coldness of the hub -----could i respectfully recommend its the tuver way round----
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how would a garage remove the inner race ?
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If you mean how do you get the inner race off the drive flange - I typically use an air chisel, and just knock it off. Much quicker than a grinder. Sometimes there may be a small burr left to dress off with a file, but not usually.
Number_Cruncher
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yeah i must mean drive flange...wasnt really sure what to call it
got no air chisel/compresor so thats a no
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bearing is in here so its more prudent to use a press to remove and replace as you get it right first time.
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yeah i know where the bearing is...thing is , whatever tool i use to push out the middle i still end up with the inner race stuck on the drive flange
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OP details a fron wheel bearing. These are pressed on and can be very difficult to get out without a press and you can damage the new one bashing it in. Your best bet is to drop the strut out goto you lacal independant and get him the change the bearing and drop the circlips back in.
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cant afford to pay a garage, and chances are the morons around here would do more damage than i will ( last garage i paid to do a wheel bearing damaged the drive flange on both sides by beating it so hard.that caused the discs to run untrue and mucho expense to have it sorted )
ive done a few before...the bearing will come out reasonbly easy with a club hammer....its just the inner race that i struggle with
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Without an air chisel, I would use a grinder. As long as you keep the cutter on the bearing and not on the metal of the underlying flange you'll be OK. As the bearing is a tight fit on the flange it will split just before you grind through. Takes a little while though!
I take it that you have a big vice to pull the new bearing into the hub? Once you have the bearing in the hub, you need to support the inner bearing from the inner side of the hub while you drift in the drive flange from the outside - it's fine if you have 3 hands! or a beautiful assistant!
Some may throw their hands up in horror, but, the main loadpath is through the solid parts of the bearing inners, and the bearings themselves don't bear much load during the flange drifting process. I've successfully mounted quite a few of this type of bearing this way when I no longer had access to the nice press in the dealership workshop.
Number_Cruncher
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The correct tool to remove an inner race stuck on the hub is a Sykes puller. This has two thick hardened plates with semicircular cut outs, thinned down at the working edges to engage in the gap between the hub and the race. Two large nuts and bolts are incorporated in the plates to pull them together around the hub.
A large puller is then used to draw the race off the hub. This works every time for me.
Differential heating and cooling can be very beneficial when fitting bearings. If you need to heat a bearing, remember that the grease within it and the bearing seals are likely to be rated only to 120 deg C or so.
659.
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Number cruncher, I am aware how easily they come off with an air chisel but they also have a habit of shattering & the bits fly everywhere!, one of my guys had one shatter & a large fragment went through his overalls entered his wrist & travelled up his arm about 8 inches requiring an operation. The thought of using an air chisel makes me shudder, imagine if it had been an eye
Doc.
Saftey before money always
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>>habit of shattering & the bits fly everywhere!...
Yes fair point!
Number_Cruncher
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well spotted bellboy , but I meant flange in the cold & bearing warmed a little just to reduce the pressure when the flange goes through the inner Doc
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There's an easy way to remove the inner race. Get a few ice cubes from the freezer and defrost them. Heat up the hub with a blowlamp and then carefully drizzle the ice cold water over the inner race. It will virtually fall out. I've done this lots of times and it works every time. Saves spending a lot of time bashing it out with a punch.
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These are the views of Robin the Technician with 35 years in the trade. I fix, therefore I am...
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