Flare Nut Removal - 411 Front Brake Cylinder

[Datman74]

Hi Guys,

 

Overhauling the brake cylinders on the 411 and wondering if anyone knows what size the flare nuts are on the steel lines that run into the back of the cylinders. I have already rounded one of them and just found out that I need a flare nut wrench to get them out.

 

I have sprayed them with penetrex and tapped them, even tried a little heat but they don't seem to want to go anywhere.

 

Anyone had similar troubles or by chance know what size flare nut wrench I need to get so that I don't have to scrap the rest of them? I guess the alternative is to replace the cylinders (aftermarket availability?)

 

Thanks in advance

[ggzilla]

Should be either 10mm or 7/16" (only one will fit). 410 used a mix of metric & imperial, but I think the 411 is mostly metric?

 

Anyways I have a 12mm x 10mm Flare Wrench

And a 7/16 x 1/2 Flare Wrench

 

You can use Vice-Grips to remove a rounded flare nut. The Flare Nut Wrench won't fix if it is partly rounded.

 

Flare Nut Wrench