Author Topic: Fitting my first 3pc in a US BB UPDATED (Read 3570 times)

ED209 · « **on:** January 22, 2011, 10:46 PM »

Fitting my first 3pc in a US BB... any thing I need to watch out for / remember?

Its a 180mm Profile

pickle · « **Reply #1 on:** January 22, 2011, 10:49 PM »

Don't forget to put the spacer between the bearings so they don't pinch when you tighten the arms up

Can't wait for this.......should be good fun

ED209 · « **Reply #2 on:** January 22, 2011, 11:01 PM »

Quote from: pickle on January 22, 2011, 10:49 PM

Don't forget to put the spacer between the bearings so they don't pinch when you tighten the arms up

Can't wait for this.......should be good fun

Rob... you read it wrong... its doesn't say 'Fitting my first 3pc in a US BB...in a Burner' so I doubt you can help

rooski · « **Reply #3 on:** January 22, 2011, 11:30 PM »

make sure tube spacer is the right length,too short it will lock the bearings,too long yer cups will stuck out the frame

QUADROPHENIA · « **Reply #4 on:** January 23, 2011, 09:25 AM »

why does this remind me of orb's spazzy dog

ED209 · « **Reply #5 on:** January 23, 2011, 10:22 AM »

Quote from: QUADROPHENIA on January 23, 2011, 09:25 AM

why does this remind me of orb's spazzy dog

Try new 'QUADROPHENIA' - 1 out of 3 posts make sense... half of the time.

ED209 · « **Reply #6 on:** January 23, 2011, 10:23 AM »

Quote from: rooski on January 22, 2011, 11:30 PM

make sure tube spacer is the right length,too short it will lock the bearings,too long yer cups will stuck out the frame

good science dude - just checked mine and it would have been too long - thanks for that

pickle · « **Reply #7 on:** January 23, 2011, 06:23 PM »

have you done it yet? come on lets see the aftermath

ED209 · « **Reply #8 on:** January 23, 2011, 07:28 PM »

Quote from: pickle on January 23, 2011, 06:23 PM

have you done it yet? come on lets see the aftermath

love you Rob

yeah I've done it - had to strip and polish the crank arms first so its taken a while.

I got all the spacers right in terms of getting the crank arms to clear the brakes but having followed rootski's advice I trimmed the middle spacer as it looked too long but now if I tighten the bolts on the crank arms 'at all' then it locks the cranks... just like he said... so I need to find the bit I cut off, file it down a bit and put it back

any feedback on my use of spacers gratefully accepted

kuwahero · « **Reply #9 on:** January 23, 2011, 07:38 PM »

Ed if you have any of the spacers I gave you left, you can use one of them on the inside to get the bearing spacing spot on.

They've come up well under the White

ED209 · « **Reply #10 on:** January 23, 2011, 07:43 PM »

Quote from: kuwahero on January 23, 2011, 07:38 PM

Ed if you have any of the spacers I gave you left, you can use one of them on the inside to get the bearing spacing spot on.

They've come up well under the White

I don't but thats a good idea Marc - I just need to track down some washers.

They came up ok didn't they

it was very thick powder with a black base coat of something that was a bitch to get off... nitromors hardly touched it... wire wool did.

pickle · « **Reply #11 on:** January 23, 2011, 07:46 PM »

Nice job ed

brettypeeps · « **Reply #12 on:** January 23, 2011, 07:47 PM »

Looking good Ed.

ED209 · « **Reply #13 on:** January 23, 2011, 07:55 PM »

cheers lads, and thanks again to Marc for a pukka crank set and BB for a sweet price

TwoBobRob · « **Reply #14 on:** January 23, 2011, 08:44 PM »

So, have a trawl around t'interwebnet and you'll find the specs for the two internal tube spacers. One is to fit in a shell made with a metric dimension, and t'other to fit in an imperial dimension of course. Next time you'll be able to simply measure the width of the shell and bobs yer uncle.

Secondly, the correct tube spacer in the majority of cases will actually prevent both cups from going fully home into the shell. This is deliberate so that when your cranks arms are bolted on tight it guarantees no lateral pressure on the bearings, which is what locks them up. The crack is to have the drive side cup/bearing all the way home, and the non-drive side slightly protruding. You can then tighten everything right up in confidence.

Munnyella · « **Reply #15 on:** January 23, 2011, 08:51 PM »

Ed

What is the spindle diameter?, I have spares of 19,20 & some 22 I think, and a spare spacer tube, 19mm, give me a ring if you need any, You may have my number from when I nearly fixed your computer!!!!

ED209 · « **Reply #16 on:** January 23, 2011, 09:18 PM »

Quote from: TwoBobRob on January 23, 2011, 08:44 PM

So, have a trawl around t'interwebnet and you'll find the specs for the two internal tube spacers. One is to fit in a shell made with a metric dimension, and t'other to fit in an imperial dimension of course. Next time you'll be able to simply measure the width of the shell and bobs yer uncle.

Secondly, the correct tube spacer in the majority of cases will actually prevent both cups from going fully home into the shell. This is deliberate so that when your cranks arms are bolted on tight it guarantees no lateral pressure on the bearings, which is what locks them up. The crack is to have the drive side cup/bearing all the way home, and the non-drive side slightly protruding. You can then tighten everything right up in confidence.

Cheers for the info. Rob.

I took the bit I cut off the spacer and popped it back in and exactly what you described happened - I was about to take it all out again and rub it on the flat wheel of the angle grinder until it fitted exactly ... but I will leave it now

The bit I had got wrong was to put the big angled spacer on the wrong side - I put that against the chainwheel with the smaller spacers against the BB bearings and it all works irie now.

Thanks to all for the advice.

ED209 · « **Reply #17 on:** January 23, 2011, 10:28 PM »

Quote from: munnyella on January 23, 2011, 08:51 PM

Ed

What is the spindle diameter?, I have spares of 19,20 & some 22 I think, and a spare spacer tube, 19mm, give me a ring if you need any, You may have my number from when I nearly fixed your computer!!!!

it was the tube spacer I might have needed cheers Mark... but seems to be ok.

I hsve a virus thought... can you help... with your hammer?

ED209 · « **Reply #18 on:** January 24, 2011, 07:05 AM »

Theres a first time for everything Wiggy

ED209 · « **Reply #19 on:** January 26, 2011, 08:06 PM »

Right - got it spaced as best as I can to clear the brakes and the chain goes mad lose then crazy tight

Any suggestions... ? will get up some pics later.

That said - rode them down the Boardroom last night... fell off lots but they felt much nicer than the old one piece

motomagII · « **Reply #20 on:** January 26, 2011, 08:26 PM »

sounds like you need top hat washer on the chainring so it sits tight on the cranks axle ?

TwoBobRob · « **Reply #21 on:** January 26, 2011, 08:27 PM »

Whip the chain off and give the cranks a bloody hard spin then stand back and have a look at your chainring; is it running true, or all over the shop? It should be pretty bang on.

Secondly, give each link on the chain a wobble, see if you have any tight spots. It needs to have a nice consistent feel to it.

That'll do for now, see how you get on

Bettyswallocks · « **Reply #22 on:** January 26, 2011, 08:29 PM »

WHS^^^^

Take the chain off spin the cranks and check the sprockets straight or has any up and down movement, that would cause a tight spot

ED209 · « **Reply #23 on:** January 26, 2011, 08:57 PM »

cheers gents - it was fine when the one piece was in so thats why I asked.

Will go have a look.

( Steve ... I bow to your Photoshop skills

)

Munnyella · « **Reply #24 on:** January 26, 2011, 09:00 PM »

Ed,

Your brake blocks, have they got removeable spacers? if so, make sure they have the small one between the caliper and the block, it will move your brake in a smidge, hence, needing less spacing on the drive side, I have never had the need to have more than 1 thick spacer and the top hat washer that side, usually, 1 mid thickness spacer and the TH.

I'm `out and about' on Friday, not a million miles from Melton, let me know if a cheeky `assist' could be beneficial.

Mark

Author Topic: Fitting my first 3pc in a US BB *UPDATED* (Read 3570 times)

motomagII

Bettyswallocks

Author Topic: Fitting my first 3pc in a US BB UPDATED (Read 3570 times)