Crank bearings

[xzburnoutzx]

Hi, I just received the Doppler Endurance Crank and HQ Racing bearings. Do the bearings need to be heated or stm, to be put on, because they dont want to go on very well. I measured the hole and the crank. Both are 20mm, but the Crank has like a little edge on it, which over the bearings dont want to go. I didnt actually push them stongly. Anyway the size is the same, but they dont want to go on . I think the edge is to make them secure when they are on, but how to get them on safely?
Here you can see the edge.(its the one, just before when the fullmoon part begins.)

 

[str8dum]

Yes you must heat the bearing to get them on. Either put them in the oven or use a heat gun.

Hi, I just received the Doppler Endurance Crank and HQ Racing bearings. Do the bearings need to be heated or stm, to be put on, because they dont want to go on very well. I measured the hole and the crank. Both are 20mm, but the Crank has like a little edge on it, which over the bearings dont want to go. I didnt actually push them stongly. Anyway the size is the same, but they dont want to go on . I think the edge is to make them secure when they are on, but how to get them on safely?
Here you can see the edge.(its the one, just before when the fullmoon part begins.)

 

[Maarten]

put the crank in the fridge and heat the bearings. The crank will shrink and the bearings will expand.
Make shure you do this right cause it is hard to remove them when they are on.

 

[xzburnoutzx]

Which side faces the fullmoon part? Either the side where there are the notes(SKF etc, Made in Japan) or the blank side. Is it possible to do anything wrong?. Can it be done with a hairdryer?

 

[airwalk3r]

Mul vahet polnud kumba pidi panema pidi.

Thanks.

 

[ex-racer#2]

Can it be done with a hairdryer?

NO!

Use an oven. Even top superbike teams use an oven to do this.

 

[xzburnoutzx]

How long do i put them and what temperature?

 

[str8dum]

i do 30 mins at 200 degrees F (93C)

How long do i put them and what temperature?

 

[xzburnoutzx]

So I´ll do half an hour with 95 degrees celcius. Correct? Anyway do they go one easily then, and do I take them from the oven and put them straigth on?

 

[xzburnoutzx]

I did as you said, and I have a small problem. I did the 30min with 100c and put the bearings on(before I put some fully syntetic oil on the crank). One of the bearings did´t go exactly next to the full moon. I hope if I put the crank in the engine it will push them together because of the pressure. Any info about this? Here are the pictures:

 

[Eoin70]

use the [ir] tag on your images it resizes them
i never fit the crank and bearings that way, i always place the bearings into the engine first. then i put in the crankshaft

 

[pr0ve]

use the [ir] tag on your images it resizes them
i never fit the crank and bearings that way, i always place the bearings into the engine first. then i put in the crankshaft

I like to mount my bearings in the case first too...

Anyway when your in this mess... Find a pipe that fits the inner ring of the bearing and use a hammer to get them strait.

 

[xzburnoutzx]

I´m going to try the pipe thing. Anyway this is my first time so be gentle I´ll let you know how it turns up. Should I put something between the bearings and the pipe(like rubber or...)

 

[Swobber]

Should I put something between the bearings and the pipe(like rubber or...)

No.

/Swobber

 

[Astrolopitec]

Funny.
I always install the baked bearings on the crank first. Then use a paint streeper gun to heat the carters.

 

[Mexicano]

Well, I do like Juan, first the bearings at the crank..

 

[xzburnoutzx]

I got them on ok, but is it ok, if the bearings like move if I move them right and left (the part on the crank is stable but the upper part moves a bit - both bearings do). Heres a video: (Click "Edasi koduleheküljele" and then right click and "Save Target As") - its like 6 mb or sth. Adress: www.zone.ee/xzburnoutzx

 

[Mexicano]

Mmmmm..to much side play to me....are those bearings C3 or C4?

Anyways...once inside the crank case they won't "move" that way anymore

 

[xzburnoutzx]

Mmmmm..to much side paly to me....are those bearings C3 or C4?

Anyways...once inside the crank case they won't "move" that way anymore

So I have nothing to worry about? Those are C4s / I think

 

[pr0ve]

Mmmmm..to much side paly to me....are those bearings C3 or C4?

Anyways...once inside the crank case they won't "move" that way anymore

The difference between c3 and c4 isnt visible that way...

But i also think that the play is alittle big, just try to insert it and test what happens. The carter should squeeze them into the right place.