OS 70 Surpass Cam Bearing removal
 

I am trying to replace my cam bearings . Have not had any luck getting them out , any ideas ?

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

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.

RE: OS 70 Surpass Cam Bearing removal
 

Check this out.

http://dieselrc.com/blog/?p=24

RE: OS 70 Surpass Cam Bearing removal
 

looks expensive

RE: OS 70 Surpass Cam Bearing removal
 

Is that puller for sale anywhere ?

RE: OS 70 Surpass Cam Bearing removal
 

Here's my puller:

RE: OS 70 Surpass Cam Bearing removal
 

how do you get it behind the bearing to pull it out, if it is flush against the wall

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 .

RE: OS 70 Surpass Cam Bearing removal
 

Glad to hear that for they can be a real problem to remove some times

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

RE: OS 70 Surpass Cam Bearing removal
 

There is a tiny bit of room under the inner race.

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

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.