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 Post subject: Re: Cranckshaft bearing
PostPosted: Mon Jul 31, 2017 9:33 am 
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Posts: 359
Hi Filippo...
The use of the word float can be confusing. It means side to side or end to end movement, not up and down like a boat.
Are you still using the stock 350 cams?
Regards...
Flattop


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 Post subject: Re: Cranckshaft bearing
PostPosted: Mon Jul 31, 2017 1:07 pm 
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Joined: Wed Aug 27, 2014 3:36 pm
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Hi Flattop
I make mistake, for"floating" I meant "axial play" as the manual.
In Italian "gioco" that is the same as "play".
https://www.ducatimeccanica.com/350_650 ... s/h-12.htm


Yes I want to use stock 350 cams.

Ciao
Filippo


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 Post subject: Re: Cranckshaft bearing
PostPosted: Mon Jul 31, 2017 9:53 pm 
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Hi Filippo...
Apologies.....my mistake.
The English language is the craziest one on the planet.
Regards...
Flattop


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 Post subject: Re: Cranckshaft bearing
PostPosted: Tue Aug 01, 2017 10:14 am 
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Filippo,
Skf made the angular bearings in three verslons, with iron, bronze and resin cage.
Difference was the max revs they could turn.
Fit crank without shims, measure play and then put 0,10 to 0,15 thicker shims in.
After tightening the cases the crank should turn over without help.
As said : I did the gearbox before and took it out for easier working.
Ciao
Ducadini

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 Post subject: Re: Cranckshaft bearing
PostPosted: Wed Aug 02, 2017 1:55 am 
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Posts: 325
Hi Flattop, it's a pleasure!
On this site I learn twice, about engines and about English.


"Fit crank without shims, measure play and then put 0,10 to 0,15 thicker shims in.
After tightening the cases the crank should turn over without help."
Hi Ducadini, now is all clear, I will try to do as you say.

Thank you everybody.
Ciao
Filippo


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 Post subject: Re: Cranckshaft bearing
PostPosted: Wed Aug 09, 2017 10:42 am 
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Joined: Wed Aug 27, 2014 3:36 pm
Posts: 325
Hi all
I managed to remove the crankshaft bearing with same kind of tool I made by me.
The left bearing came out without heating . Just few, very soft ,Hamner Shots.
https://www.flickr.com/photos/156916018 ... res/8FC1H0

Ciao
Filippo


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 Post subject: Re: Cranckshaft bearing
PostPosted: Thu Aug 10, 2017 1:39 am 
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Hey Filippo...
The bearings do not look like angular contact or roller bearings. Straight cut or helical primaries in the motor?
What are the stamped numbers-letters on the 350 cams?
Regards...
Flattop
Took a better look at your photos. Yes.... angular contact bearings. At first sight it looked like black seals on the bearings.


Last edited by flattop900 on Thu Aug 10, 2017 10:11 am, edited 1 time in total.

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 Post subject: Re: Cranckshaft bearing
PostPosted: Thu Aug 10, 2017 9:19 am 
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Joined: Thu Oct 14, 2010 7:30 am
Posts: 173
Those RHP bearings use a pretty thick phenolic ball separator. Would need to see the other side of the bearing to be sure. If the bearing came out easily without heating it would be a good idea to use some Loctite on the outer race when you re- assemble the engine. You don't want the race to spin in the case at high revs/load. Continued use with loose races can damage the cases.


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 Post subject: Re: Cranckshaft bearing
PostPosted: Fri Aug 11, 2017 6:03 am 
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Joined: Wed Aug 27, 2014 3:36 pm
Posts: 325
Hi Flattop
350 stock Cams are marked with O 3 and V 3 see pics
I take more pics on the bearing but these a 're still blurry. Sorry
Hi wdietz186 which kind of Loctite I have to use?
https://www.flickr.com/photos/156916018 ... res/74M852

See link for bearings and cams
Ciao e grazie
Filippo.


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 Post subject: Re: Cranckshaft bearing
PostPosted: Fri Aug 11, 2017 11:15 am 
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Posts: 268
Filippo,

Was the discussion only about the crankshaft bearings or also about the 6207 and 6307 ?
You can use the FAG bearings without problem, doesn't have to be SKF.
Just be sure to order the correct ones : RS for one side oilseal, 2RS for double side oilseal.
SKF has a great site where You can find all info on their bearings.

ciao
joseph

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