CCT conversion

[James England]

With the copper crush washer and all I figured it needed a lot

I don't think it's a crush washer. It's just a copper sealing washer, like the ones on the brake line banjos. Or is that what you call a crush washer? I thought they kind of collapsed when tightened...

[WMarshy]

I don't think it's a crush washer. It's just a copper sealing washer, like the ones on the brake line banjos. Or is that what you call a crush washer? I thought they kind of collapsed when tightened...

Yeah, same difference in my book...

[James England]

Yeah, same difference in my book...

Yep, same on Wikipedia...

"The term washer is often applied to various gasket types such as those used to seal the control valve in taps. Crush washers, made of a soft metal such as aluminium or copper and used to seal fluid or gas connections such as found in an internal combustion engine."

I must have been thinking of something like a sparkplug washer... which actually collapses as you tighten up. I think they're meant to assist in not overtightening, as they collapse once the required torque is reached. Or, worryingly, this might be a completely 'false memory'. ...these days I never know.....

Nice to know my CCT has the correct one on it..a hefty copper one....it certainly doesn't leak.

[crazy steve]

"The term washer is often applied to various gasket types such as those used to seal the control valve in taps. Crush washers, made of a soft metal such as aluminium or copper and used to seal fluid or gas connections such as found in an internal combustion engine.".

You're probably thinking of a crush sleeve, which is used to set bearing pre-load. You torque those until the preload is good; they 'crush' in length...

[WMarshy]

Yep, same on Wikipedia...

"The term washer is often applied to various gasket types such as those used to seal the control valve in taps. Crush washers, made of a soft metal such as aluminium or copper and used to seal fluid or gas connections such as found in an internal combustion engine."

I must have been thinking of something like a sparkplug washer... which actually collapses as you tighten up. I think they're meant to assist in not overtightening, as they collapse once the required torque is reached. Or, worryingly, this might be a completely 'false memory'. ...these days I never know.....

Nice to know my CCT has the correct one on it..a hefty copper one....it certainly doesn't leak.

Cool, thanks for the explanation. Like I said, don't use much more than 20 ft/lbs, they will snap!

[James England]

Cool, thanks for the explanation. Like I said, don't use much more than 20 ft/lbs, they will snap!

Def worth knowing. Like yours, my two took a hell of a lot of undoing, so I thought, "better really tighten them up hard". Looks like I was lucky and didn't overdo it. Nice that they come in pairs usually though, eh? My other one found a new home on an XS100 here in the UK.... I better e-mail him with that torque figure........