Crankcase bearing fitting

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Crankcase bearing fitting

Post  Chris_w_65 on Thu Aug 07, 2014 4:55 pm

Time to start putting my motor together  banana  banana  banana 
What is the best way of fitting the new bearings (all of them).

Option 1 - Gas heat gun

Option 2 - Samsung oven (when the lady is out) - If this is the best option then what temp is safe.

Thanks

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Re: Crankcase bearing fitting

Post  Mad Frosty on Thu Aug 07, 2014 7:31 pm

What about the freezer  Bump 
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Re: Crankcase bearing fitting

Post  Chris_w_65 on Thu Aug 07, 2014 8:57 pm

Mad Frosty wrote:What about the freezer  Bump 

Yes, I will hide the bearings in there overnight  Very Happy 
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Re: Crankcase bearing fitting

Post  Chris_w_65 on Thu Aug 07, 2014 9:08 pm

Was a bit tricky getting the main bearings out - They are in a 5mm thick steel sleeve in the casing - obviously that heated at the same rate as the bearing.

Hopefully a preheated case and cooled bearing will do the trick - I read the casing should be heated at 105C for 30 mins
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Re: Crankcase bearing fitting

Post  Mad Frosty on Thu Aug 07, 2014 9:30 pm

I have can of spray from the bay called the freeze release , you can spray it on the bearinng to shrink it before pulling it out or installing it .
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Re: Crankcase bearing fitting

Post  Hew on Fri Aug 08, 2014 1:26 pm

Place the bearings in a plastic bag in the freezer
Wrap each of the cases in foil to keep the oil smell to a minimum and heat to 130 degrees C for 1/2 hour.
Take the cases out one at a time and carry to your work bench with oven gloves. Buy your wife a new pair as a present prior to this. Very Happy 
The old bearings will fall out, even the ones you don't want to change, although they might need a slight tap.
Take the new bearings from the freezer and drop them in again they may need a slight tap to make sure they are fully home.

Very effective and wrapping the cases does mean that the oven can be used for food straight after.

First time I did this I heated cases up to 200 degrees C without any covering, set off the smoke alarms in the house and ate cold shoulder for a week afterwards. naughty 

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Re: Crankcase bearing fitting

Post  Chris_w_65 on Fri Aug 08, 2014 4:42 pm

Hew wrote:Place the bearings in a plastic bag in the freezer
Wrap each of the cases in foil to keep the oil smell to a minimum and heat to 130 degrees C for 1/2 hour.
Take the cases out one at a time and carry to your work bench with oven gloves. Buy your wife a new pair as a present prior to this. Very Happy 
The old bearings will fall out, even the ones you don't want to change, although they might need a slight tap.
Take the new bearings from the freezer and drop them in again they may need a slight tap to make sure they are fully home.

Very effective and wrapping the cases does mean that the oven can be used for food straight after.

First time I did this I heated cases up to 200 degrees C without any covering, set off the smoke alarms in the house and ate cold shoulder for a week afterwards. naughty 


Lucky my casings are 100% clean - Bearings are in freezer at -26C - Will see if my casings fit in the oven  Very Happy 
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Re: Crankcase bearing fitting

Post  Zoro on Sat Aug 09, 2014 12:59 am

Crikey...-26C...are you into cryogenics???

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Re: Crankcase bearing fitting

Post  Chris_w_65 on Sat Aug 09, 2014 7:42 am

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Re: Crankcase bearing fitting

Post  Chris_w_65 on Sat Aug 09, 2014 8:41 am

Left side bearings in  banana 
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Re: Crankcase bearing fitting

Post  Chris_w_65 on Sat Aug 09, 2014 2:10 pm

Have any of you guys tried cleaning engine parts in the dishwasher? Are you still alive?

BTW, all bearings in
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Re: Crankcase bearing fitting

Post  Hew on Sat Aug 09, 2014 2:50 pm

Well......
Yes I have cleaned a couple of cases in the dishwasher. It certainly cleaned them up although it did darken the colour of the alloy by quite a bit. The wife insisted on running the dishwasher empty for a full heat full length cycle afterwards but it was ok and the next utensil wash was fine.
My friend waits until his wife goes out but I am stuck as I have no idea how kitchen appliances work Bump 

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Re: Crankcase bearing fitting

Post  Chris_w_65 on Sat Aug 09, 2014 3:25 pm

Hew wrote:Well......
Yes I have cleaned a couple of cases in the dishwasher. It certainly cleaned them up although it did darken the colour of the alloy by quite a bit. The wife insisted on running the dishwasher empty for a full heat full length cycle afterwards but it was ok and the next utensil wash was fine.
My friend waits until his wife goes out but I am stuck as I have no idea how kitchen appliances work Bump 


Testing the dishwasher on a spare scooter case i have - Wife having afternoon nap - less than an hour left...

I did clean the part pretty well before though - Just saying.

Had my XR cases soda blasted - took all the stains off the ally.

Anyway, now that all the bearings in the XR cases I will press the crank in this week and at least assemble the bottom end next weekend...
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Re: Crankcase bearing fitting

Post  Chris_w_65 on Sat Aug 09, 2014 4:15 pm

Hew wrote:Well......
Yes I have cleaned a couple of cases in the dishwasher. It certainly cleaned them up although it did darken the colour of the alloy by quite a bit. The wife insisted on running the dishwasher empty for a full heat full length cycle afterwards but it was ok and the next utensil wash was fine.
My friend waits until his wife goes out but I am stuck as I have no idea how kitchen appliances work Bump 


Dishwasher is not a good idea!! - The casing came out dark grey same as when you leave AluBrite on for too long - Apparently the dishwasher pills are caustic!! I will take the case to my mate next weekend and soda blast it to get the right colour back.
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Re: Crankcase bearing fitting

Post  Mad Frosty on Sat Aug 09, 2014 8:40 pm

That's right many chemicals used in the kitchen are too agressive to use on a bare metal, except stainless steel or stuff that was designed to be washed this way .
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Re: Crankcase bearing fitting

Post  Hew on Sat Aug 09, 2014 10:37 pm

Chris_w_65 wrote:

Dishwasher is not a good idea!! - The casing came out dark grey same as when you leave AluBrite on for too long - Apparently the dishwasher pills are caustic!! I will take the case to my mate next weekend and soda blast it to get the right colour back.

Make sure that you scrub oil into the casing to make sure that they don't start to corrode.
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Re: Crankcase bearing fitting

Post  Chris_w_65 on Tue Aug 12, 2014 2:35 pm

Crank is in the freezer now - Will let it get nice and cold and then get the left casing and the right main inner race in the oven and hopefully get all done before the wife gets home from work
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Re: Crankcase bearing fitting

Post  Chris_w_65 on Tue Aug 12, 2014 5:23 pm

Crank in :-)
Time to bring the motor inside and finish building it in my office
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Re: Crankcase bearing fitting

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