Removing a BB from a GT

AR-CoolC · Apr 10, 2009

Hi All

I'm in the process of stripping my GT Tequesta, all is off now apart from the BB.

I have the correct splined tool, but can't tell if one side is reveres threaded or not. Both sides are fast in.

So which side is reverse threaded, and which side needs to be removed first?

TIA

jimihendrix · Apr 11, 2009

Conventional thread (clockwise to tighten) is on the left hand (non drive side), right hand (drive side) is left hand thread (counterclockwise to tighten, clockwise to slacken), if it's a Shimano BB i've always taken out the non flanged left hand cup first but not sure if it makes a difference.

Xesh · Apr 11, 2009

Easiest way to remember how to undo the cups is to turn the spanner towards the front wheel (works on either side). Obviously turn towards the back wheel to tighten.

Best bet is to remove the lefthand (non-driveside) cup first. Make sure that you have a long handle on the spanner, especially for the driveside. It also makes things easier if you can use a crank bolt to fix the tool onto the BB when removing the driveside, just so you don't slip and bash your knuckles.

mattbrown · Apr 11, 2009

Xesh":3s7p1o8q said:
Easiest way to remember how to undo the cups is to turn the spanner towards the front wheel (works on either side). Obviously turn towards the back wheel to tighten.

Best bet is to remove the lefthand (non-driveside) cup first. Make sure that you have a long handle on the spanner, especially for the driveside. It also makes things easier if you can use a crank bolt to fix the tool onto the BB when removing the driveside, just so you don't slip and bash your knuckles.

i use that type of thinking for the pedals (but its the other way round)

AR-CoolC · Apr 11, 2009

Thanks for the replys chaps.

AR-CoolC · Apr 12, 2009

Xesh":3t5zgaa0 said:
Easiest way to remember how to undo the cups is to turn the spanner towards the front wheel (works on either side). Obviously turn towards the back wheel to tighten.

Best bet is to remove the lefthand (non-driveside) cup first. Make sure that you have a long handle on the spanner, especially for the driveside. It also makes things easier if you can use a crank bolt to fix the tool onto the BB when removing the driveside, just so you don't slip and bash your knuckles.

So remove the BB by turning in the same direction as the crank rotation!

Logic says that's the wrong way, as in threory pedalling along is un-screwing the BB.

Anyway, thanks for the replies, hopefully I'll get this out this afternoon, then I can start cleaning everything back up, and start re-assembly.

On that note, whats type of grease should I be buying to use on the headset etc?

Cheers

Xesh · Apr 12, 2009

AR-CoolC":2tg41awq said:
Logic says that's the wrong way, as in threory pedalling along is un-screwing the BB.

You have no idea how many times I've heard that. The other one being about the pedals tightening up when riding. :roll:

This would only happen if the axle seized completely solid.

orange71 · Apr 12, 2009

Logic says that's the wrong way, as in threory pedalling along is un-screwing the BB.

better than tightening it up :shock:

jimihendrix · Apr 12, 2009

AR-CoolC":1y1z8lfc said:
On that note, whats type of grease should I be buying to use on the headset etc?

I use white Finish line stuff but any white bike specific grease should do though i dont know if there is any disadvantages using light car type grease ?

Also spray lube, GT85 is better than WD40, it has teflon in it so does'nt wash off as easy, smells nicer too

perry · Apr 12, 2009

better than tightening it up

i had a quick go on a shonky bmx with a 0piece crank that would tighten itself years ago . 4 cranks forward , 2 cranks back

Removing a BB from a GT

AR-CoolC

jimihendrix

Xesh

Senior Retro Guru

mattbrown

AR-CoolC

AR-CoolC

Xesh

Senior Retro Guru

orange71

jimihendrix

perry

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