Webra 145 SS bearing

[Rcmaster199 at aol.com]

It isn't necessary to first disassemble the piston and rod. After removing  
the sleeve, move the piston to near TDC, slip an allen wrench behind the  rod 
and work it off the crank pin. Rock the crank slightly and the rod will come  
off the pin. BUT, if you can't do that for some reason, then proceed with what  
Keith says.
 
One thing that should not be done is to tap the bearing races to seat the  
bearing. Tapping the wrong race will oftern score the balls and will cause  
premature bearing failure. 
 
MattK

The biggest trick on the Webra 1.45 is removing  the wrist pin from piston in 
order to remove the connecting rod. If you never  done this it's helpful to 
know the following trick. 
 
Remove the sleeve and position the piston so the  wrist pin can be seen 
through the exhaust port. You'll see a wire retaining  clip that seats into a 
groove in the wrist pin hole. This clip keeps the wrist  pin from slipping out. Use 
pliers to remove this wire clip. Then take one of  the bolts that are used to 
hold the head on the motor and thread that bolt  into the end of the wrist 
pin. This will allow you to pull the wrist pin out.  Hope that was clear, it's 
really better to demonstrate.
 
Also, to add to what Don said, before putting the  crank case in the oven 
remove all other components including the carburetor  and the crank shaft from 
the crank case. Then when putting the bearings back  in I always slide the 
bearings onto the crank shaft first and then take the  heated crank case out of the 
oven and use the crank shaft to slide the  bearings in place. This helps keep 
them from getting in there a bit crooked.  But I guess there's more than one 
way to skin the proverbial cat.
 
Keith

----- Original Message ----- 
From:  _Don Szczur_ (mailto:dszczur at maranatha.net)  
To: _discussion at nsrca.org_ (mailto:discussion at nsrca.org)  
Cc: _NVRC-List at yahoogroups.com_ (mailto:NVRC-List at yahoogroups.com)  
Sent: Sunday, October 17, 2004 8:49  PM
Subject: Re: Webra 145 SS bearing


Randy, you must not have gone through home-ec  in high school.  
 
Put the crankcase in the oven, bake  it for 15 minutes on 250. 
 
While the engine is baking, put the new set of  bearing on ice and let them 
marinate at 32 degees or so in the freezer- 10  minutes should work.
 
Don't forget to use your oven mits when you  take the crankcsase out.
 
Pull out the bearings with a pair of needle  nose pliers.  Put the engine 
back in the oven and bake for another 15  minutes.
 
Pull out of the oven, take the bearings out of  the freezer, and slip them 
in. You should hear them go Flop.  And slip  right in and seat at the front of 
the crankcase.
 
Sip a glass of hot chocolate as the engine  cools down.  Re assemble.  Fly.
 
Don
 

----- Original Message ----- 
From:  _Randy_ (mailto:randy10926 at comcast.net)  
To: _discussion at nsrca.org_ (mailto:discussion at nsrca.org)  
Cc: _Don  Szczur_ (mailto:dszczur at maranatha.net)  ; 
_NVRC-List at yahoogroups.com_ (mailto:NVRC-List at yahoogroups.com)   
Sent: Sunday, October 17, 2004 7:02  PM
Subject: Webra 145 SS bearing


The new SS bearing came in from the freindly  bearing maker.  They look 
really nice.  So how hard is it to  change the rear bearing in a Webra145?
 
 
Randy





 
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