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OS 70 Surpass Cam Bearing removal

Old 01-02-2012, 05:30 AM
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Slackline
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Default OS 70 Surpass Cam Bearing removal

I am trying to replace my cam bearings . Have not had any luck getting them out , any ideas ?
Old 01-02-2012, 07:18 AM
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Default RE: OS 70 Surpass Cam Bearing removal

i gave up on mine... just changing the main bearings and the engine runs a whole lot better



i think you need a special tool
Old 01-02-2012, 07:50 AM
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Default RE: OS 70 Surpass Cam Bearing removal

Hello; I found that I had to make a little slide hammer to get the inner cam bearing out. Heat makes the job go faster too. I have one designed for English (lucas) Ignitions, that I modified the slide hammer tool to grip under the edges, inner edges.

I ground two roofing nails so that I could fit the head inside the cam bearing, and pull on the shank of the two nails. Worked great.
Old 01-02-2012, 09:30 AM
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Default RE: OS 70 Surpass Cam Bearing removal

Check this out.

http://dieselrc.com/blog/?p=24
Old 01-02-2012, 10:53 AM
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Default RE: OS 70 Surpass Cam Bearing removal

looks expensive
Old 01-02-2012, 04:50 PM
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Default RE: OS 70 Surpass Cam Bearing removal

Is that puller for sale anywhere ?
Old 01-02-2012, 06:33 PM
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Default RE: OS 70 Surpass Cam Bearing removal

Here's my puller:
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Old 01-02-2012, 07:07 PM
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Default RE: OS 70 Surpass Cam Bearing removal


ORIGINAL: Kmot

Here's my puller:
how do you get it behind the bearing to pull it out, if it is flush against the wall
Old 01-02-2012, 08:26 PM
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Default RE: OS 70 Surpass Cam Bearing removal

Tried the Bee's wax and it did work . Took about 10 to 15 min each to get them out .
Old 01-02-2012, 10:28 PM
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Default RE: OS 70 Surpass Cam Bearing removal

Glad to hear that for they can be a real problem to remove some times
Old 01-03-2012, 06:37 AM
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Default RE: OS 70 Surpass Cam Bearing removal

It is a little late but here is a old thread with lots of information about how one can get the cam bearing out.
http://www.rcuniverse.com/forum/m_69...tm.htm#6960344


Old 01-03-2012, 10:23 AM
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Default RE: OS 70 Surpass Cam Bearing removal


ORIGINAL: MetallicaJunkie


ORIGINAL: Kmot

Here's my puller:
how do you get it behind the bearing to pull it out, if it is flush against the wall
There is a tiny bit of room under the inner race.
Old 01-03-2012, 03:46 PM
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the pope
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Default RE: OS 70 Surpass Cam Bearing removal

Has anyone tried using a dyna bolt ( I dont know if its called something different in other countries )? There used to bolt stuff to concrete. If u canget the right size to fit into the inner race and then tighten it up I think that would hold just fine . Then its JUST a matter of getting that asssembly out in one . I havent had the need to try it but when I do I will give it a shot. Cheers the pope
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Old 02-04-2012, 08:00 AM
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Default RE: OS 70 Surpass Cam Bearing removal

Hi The Pope

Great idea using a Dynabolt. Used it to get the main crank bearing out of a YS140. Absolutely painless.

As for the cam bearings, the candle wax & drill/punch method is simple & effective. Takes about 5 mins a side. Use it on an ASP61, OS91 and now YS140.

Much appreciated.

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