Union on rear brake cylinder seized..

[laurence_13]

Just gone to replace my brake cylinder as it was leaking, went to undo the union nut that according to the guide is 11/13mm... 11's slightly too big and grips but not enough to undo it and 10s far too small.

Thought about undoing the pipe where it joins the flexi bit of hose and threading it through but that's stuck solid too...

Any ideas?

Cheers laurence

[Danny2009]

Use a proper brake pipe spanner or it will round

Failing that mole grips

Or chop the union off and flare a new one on

[laurence_13]

Use a proper brake pipe spanner or it will round

Failing that mole grips

Or chop the union off and flare a new one on

Hmm theyre already slightly rounded, ill see if i can pick up one of those spanners tomorrow

[Matt]

Proper spanner and plus gas. This did mine

[bashbarnard]

If not cut the pipe flush to nut. Hammer on socket. Make new brake pipe up. It's only a shirt one. Clamp the flexi hose off first though. If you.dont have a proper tool to clamp it use a pair of mole grips with a bit of cardboard