why would that be warranty

Magura fluid is blue, and it’s mineral oil iirc, if they’ve been bled correctly and still not right then warranty, if the shops used dot fluid then they’ve got to sort it out..
Put some bog roll round the hose junctions and squeeze em on and off a few times, if the fluids seeping out it might be a wonky olive..

I’d get an Epic bleed solutions kit and the proper fluid and try it myself, you’ll need one anyway..
And check the olives.

Your logic is flawless.

1. Take delivery of brake. It works perfectly
2. Have hose shortened by LBS. It now no longer works
3. Send to Germany under a warranty claim

Sure I read that you had to use Shimano mineral oil as its not like dot fluid (i.e. not a standard that lots of people make). I know that manufacturers all say this but in this case it rang true for me.

You’ve actually voided the warranty by using non Shimano brake fluid. If you’re going to send it back, make sure its flushed through with the Shimano pink fluid!

My experience of shimano brakes is that they all do it sometimes straight away or after a few months. Never bled any other brake more.

Have you popped the wheel out and pumped the lever until the pistons sit slightly proud of where they once were?

They’ve **** them !

Funnily enough my 2014’s do this. They were crap out the box but because the hoses needed shortening I was happy to re-bleed them. I have the correct Shimano bleed kit and it’s a job I’ve done many times before – I can get a perfect feel at the lever without any headaches.

Anyway, about every couple of months they need bleeding. I’ve checked all couplings, checked the caliper body was properly torqued together, and I don’t know what else to check. I think they’re just shite put together.

Sorry, but the whole “MUST USE SHIMANO FLUID!!!” thing is quite frankly bollocks.

Here is why: Hydraulic seals are generally made from PTFE, Nitrile or Viton. They are all fine Mineral based Hydraulic Oils.

I have you Halfords LHM Plus (used on Citreon hydralics for example) in 4 sets of Shimano brakes for Ooooo a decade with no issues.

It’s slightly more viscous than the Shimano stuff so bleeding is a bit more tricky.

I wonder if Shimano’s statement has anything to do with the HUGE amount they mark up their mineral oil. It certainly reeks of “don’t sue me or ask for warranty” if you use “their” fluid.

Also… http://www.epicbleedsolutions.com/products/brake-fluid/lhm-plus-mineral-oil/

I would be very interested in what Shimano make their seals out of if they can be affected by using a different brand of mineral oil.
Nitrile gets killed very quickly by DOT. My guess they are Nitrile, hence the only use our fluid to stop idiots using DOT.

Interesting…

begs the questions, a) what does Shimano make it’s seals out of. and b) what on earth are magura putting in it’s “Royal Blood”.

Somewhere in Germany…….

Ah right. I just read the first few posts and lost interest when I realised it was one of your unfortunate warranty tales. You do seem to have rotten luck 😉

So. Somewhere in Germany