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Post subject: Bearing removal advice
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1966  Powerband Master Joined: 26 Aug 2007 Total posts: 613 Location: Pig on the wall country |
In refurbing my YPVS engine covers, the clutch push lever needle bearing is shagged but i can't get it out    .
I don't want to wreck the cases trying, but the bugger won't budge.
You can't get underneath it to knock it out,very frustrating 
So any advice would be most excellent ( Been watching Bill & Ted  )
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Posted: Sun May 04, 2008 5:10 pm
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dbanberyPowerband Master Joined: 23 Feb 2007 Total posts: 543 Location: Cleckhuddersfax [Huddersfield] |
heat the casing up with a blowtorch, then tap it out. that should do it.
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Posted: Sun May 04, 2008 6:16 pm
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| beek |
I expect there is a special puller to do these but ive gently heated case around bearing with a blow lamp and with a srewdriver pushed under edge on bearing ( rest srewdriver on small piece of wood to give some leverage) if you can move it just a bit your be able to tap it from underneath. but you need to keep it warm with the blow lamp.
remember heat can distrot case so take care.
or you can use a srewdriver to on edge of bearing and give it a few hard clouts and it will break/ bend so you can get hold with pliers and pull out.
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Posted: Sun May 04, 2008 6:20 pm
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1966Powerband Master Joined: 26 Aug 2007 Total posts: 613 Location: Pig on the wall country |
I have tried to grip it with a wheel bearing removal tool and this gripped the needle bearing ,it wouldn't budge,but i didn't apply any heat
I didn't want to hit any harder as i had visions of cracking the case
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Posted: Sun May 04, 2008 6:21 pm
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| beek |
| 1966 wrote: |
I have tried to grip it with a wheel bearing removal tool and this gripped the needle bearing ,it wouldn't budge,but i didn't apply any heat
I didn't want to hit any harder as i had visions of cracking the case |
The case of the bearing is quite soft so bending is easy the more its bent the easier it is to come out.
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Posted: Sun May 04, 2008 6:28 pm
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1966Powerband Master Joined: 26 Aug 2007 Total posts: 613 Location: Pig on the wall country |
| beek wrote: |
| 1966 wrote: |
I have tried to grip it with a wheel bearing removal tool and this gripped the needle bearing ,it wouldn't budge,but i didn't apply any heat
I didn't want to hit any harder as i had visions of cracking the case |
The case of the bearing is quite soft so bending is easy the more its bent the easier it is to come out. |
So which direction do i tackle getting to the bearing to bend it ?
I have it in front of me now
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Posted: Sun May 04, 2008 6:49 pm
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dbanberyPowerband Master Joined: 23 Feb 2007 Total posts: 543 Location: Cleckhuddersfax [Huddersfield] |
like beek said, all i'll add is that it needs to tapped with a moderate force equally round the edge of the bearing if you can, and then it will come out slowly at first, then move more as you drift it out.
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Posted: Sun May 04, 2008 6:54 pm
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kookimonsta Rear-wheel Steering! Joined: 16 Dec 2003 Total posts: 2647 Location: Wolverhampton, West Mids, UK |
get a small sharp chisle and split the cage in a few placed it will bend inwards and you should be able to pull it out. i have to do this to my cases when they come back from the powdercoaters and will use this way
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Posted: Sun May 04, 2008 7:03 pm
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Post subject: just use heat
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spondon440 Daily Burner Joined: 07 Feb 2007 Total posts: 150 |
It's best to just use heat on aluminium casings, there expansion rate is incredible, heat it with a blow lamp and it will just fall out.
Andy
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Posted: Sun May 04, 2008 7:34 pm
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1966Powerband Master Joined: 26 Aug 2007 Total posts: 613 Location: Pig on the wall country |
Thanks for the replies
The inner bit of the bearing came out fairly easy and all the needles bits fell out.
The outer bit is still there though
I need to apply some heat like you lot say ,so i will have to wait.
I read somewhere if you keep pouring a boiling kettle over the area,would this have the same affect ?
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Posted: Sun May 04, 2008 8:06 pm
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TygerTungDaily Burner Joined: 21 Sep 2005 Total posts: 198 Location: Christchurch, New Zealand |
Yeah that would, or a decent fan heater, a hair-dryer. A heat gun would be ideal.
The rate of expansion for aluminium is much higher than steel so a bit of heat wont go amiss.
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Posted: Sun May 04, 2008 11:17 pm
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1966Powerband Master Joined: 26 Aug 2007 Total posts: 613 Location: Pig on the wall country |
Eureka!!!!!!!!!!!
Well got the missus's heat gun,2 mins holding it around the area
a few hefty taps and it fell out  
Now i will order a new bearing
Question is
Shall i heat it up the same to put the new bearing back in 
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Posted: Mon May 05, 2008 5:46 pm
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