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Rear wheel bearing removal

 
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spiderwheels
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PostPosted: Mon Nov 04, 2019 5:13 pm    Post subject: Rear wheel bearing removal Reply with quote

Yes I've removed the circlip but no amount of trying to whack the bearing through from the other side with a big hammer has managed to shift it.

Does anyone have a link to a suitable puller?
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mangocrazy
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PostPosted: Mon Nov 04, 2019 9:39 pm    Post subject: Reply with quote

It's a proper ball-ache (as you are finding out). The problem is the alloy tube that sits between the bearings and which stops you getting any purchase on the bearing inner race from the other side. I bought a slide hammer bearing puller kit off ebay years ago, and that was the only way that I got the bearings to budge. Once you've moved them a bit it becomes easier, but it's getting that first 2 or 3mm of initial movement that's the real pain.
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D-Rider
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PostPosted: Tue Nov 05, 2019 9:19 am    Post subject: Reply with quote

If I remember correctly, when I changed mine, I had to cut the first one out before drifting the second one.

I do have a slide hammer now which I hope will help the next time I need to do this.
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spiderwheels
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PostPosted: Tue Nov 05, 2019 10:08 am    Post subject: Reply with quote

I've got around the issue of the tube by using a 25mm rawl bolt through the bearing. Once tightened up it grabs the bearing and it should be possible to drift it out from the other side but it won't budge.

Perhaps I need a better surface as resting the whole lot on a pallet means the force is being absorbed by the tyre.
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D-Rider
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PostPosted: Tue Nov 05, 2019 11:22 am    Post subject: Reply with quote

Maybe some gentle heat would help? - the alloy wheel should expand faster than the steel bearing.

eg pack it with rags and pour boiling water on them. I've shifted things this way before.
Obviously exercise the necessary care.
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mangocrazy
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PostPosted: Tue Nov 05, 2019 10:41 pm    Post subject: Reply with quote

Or a hot air gun, used judiciously. Bit less messy than boiling water.
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PostPosted: Wed Nov 06, 2019 6:52 pm    Post subject: Reply with quote

mangocrazy wrote:
Or a hot air gun, used judiciously. Bit less messy than boiling water.

True
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spiderwheels
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PostPosted: Thu Nov 07, 2019 1:26 pm    Post subject: Reply with quote

D-Rider wrote:
Maybe some gentle heat would help? - the alloy wheel should expand faster than the steel bearing.

eg pack it with rags and pour boiling water on them. I've shifted things this way before.
Obviously exercise the necessary care.


It turns out this is the way to do it! Thanks for the tip.

I don't own a hot air gun and my previous attempts at heating it up with a hair dryer didn't get enough heat into it to make a difference. The rag and boiling water works wonders though (and I could do it outside the garage so no worries about the mess).

The new bearings will be spending the night in the freezer...
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D-Rider
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PostPosted: Thu Nov 07, 2019 1:54 pm    Post subject: Reply with quote

spiderwheels wrote:
D-Rider wrote:
Maybe some gentle heat would help? - the alloy wheel should expand faster than the steel bearing.

eg pack it with rags and pour boiling water on them. I've shifted things this way before.
Obviously exercise the necessary care.


It turns out this is the way to do it! Thanks for the tip.

I don't own a hot air gun and my previous attempts at heating it up with a hair dryer didn't get enough heat into it to make a difference. The rag and boiling water works wonders though (and I could do it outside the garage so no worries about the mess).

The new bearings will be spending the night in the freezer...


..... a little trick my dad showed me when I was a lad .... before the days of hot air guns


.... not quite sure why I didn't think to do this a few years back when I was struggling with the same task
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spiderwheels
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PostPosted: Thu Nov 07, 2019 2:34 pm    Post subject: Reply with quote

This is a wonderful sight:


It's a shame you didn't remember as it made the whole thing a 5 minute job..

That sort of thing always reminds me that I should have listened to what my mother told me when I was young...
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PostPosted: Fri Nov 08, 2019 9:30 am    Post subject: Reply with quote

spiderwheels wrote:
This is a wonderful sight:


It's a shame you didn't remember as it made the whole thing a 5 minute job..

That sort of thing always reminds me that I should have listened to what my mother told me when I was young...



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