Swapping brake lines

[Jimmy2021]

Hi everyone,
On my bike I have the rear brake on right lever and I would like to have it on the left.
They're disc brakes.
Having very recently changed the brake oil, I would prefer not to do it again, so my question is:
Can I simply unbolt the brake lines at levers and swap them being careful not to drop oil or would i need new olives and inserts and then bleed the brakes?
Lines are of correct length to be swapped, so no need to modify them
Thanks

 

[bikeworkshop]

Give it a go unbolting and swapping.
I manage almost 100% success.

Keep the hose and lever ends facing up as much as possible, put a drip of the correct fluid on the ends and flick them gently to release any bubble formed.

Take care not to squeeze the lever or flip the hose when everything is open. I use a vice to hold the lever - an assistant would be helpful.
The excess fluid will seep out as you reinsert the hoses, so a rag is helpful.

You can always "do it properly" if the Olives don't crush down right.

One of the few jobs where a Torque wrench with crowsfoot is helpful

 

[Jimmy2021]

What's the correct torque for those bolts please?

 

[bikeworkshop]

You need the manufacturer, model name and Google, and there you have it.
Shimano, 7nM

 

[Jimmy2021]

Thanks.
Found it