gear case upgrade

my cw70's gear case is badly warn and im going to replace it with a improve desine
https://www.scooter-attack.com/shop...9930300-Gear-Cover-TopPerformances-BLACK.html
but i cant get this gear out the case

any ideas i have already tried to tap it out with a wooden malet to no avail any suggestions?

 

need to press the bearing out take it to a garage with a press, shouldnt be too explensive as you have stripped it already.

 

will the new case need repressing then?

 

if you take both cases they should do it there and then, some bearings can be stupidly tight. my 406 coupe wheel bearing took 10 tonnes of pressure to crack!! this may sound silly but have you tried to heat the case in the oven? getting the metals to expand slightly might help. if i remember correctly ali expands quicker than steel

 

wow 10 tonnes thats insane i might try a heat gun on it but i havent got the new one yet so i will take them both at the same time thanks

 

thats ok if you do have a go at heating it yourself remember ali melts at half the temp of steel

 

we just use a heat gun at work, heat it up around the bearing, and keep spraying it with penetrating oil, then just tap it out, then put your new bits in while its hot (or let it cool clean it then put your new stuff in)

 

ah success the trustyheat gun and wd40 came out on the first tap but how do i get the bering off ?

 

same way you got the part out the case, heat it and tap it

 

thanks