Magura Brake Hacking

Jess If your still home in G.B. you can take a look at some line I have
for the hydraulics but I dont have any connectors
Robert

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Nice going! It's cool to see people's creativity.

In the future, if you want to go back to Magura parts, 'I do service '
(http://tinyurl.com/kp7e9)Magura brakes with plastic or stainless steel
cables, with 90 degree connectors or not.

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i think you need a new lbs mine sold me like 10 feet of magora tube for
like 3$. also another tip dont heat the tube heat the fiting it makes
it easer cuz the tube dosint get all flexey

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Dealing with the fittings sizes for switching to a braided line
cross-over is tricky. The brakes have two different size threads for
the brake line (different thread size and different thread pitch). The
Magura branded braided line fits into different holes on the brakes
than the plastic line. The result is that you cannot use the Magura
braided crossover hose in place of the plastic crossover hose. You
have to replace both the crossover and the main hose with the Magura
braided hose to get it to work.

You can go after market for a replacement braided crossover hose. A DH
or freeride oriented bike shop will have have hydraulic brake fittings
and hose. With luck they'll have the fittings that will fit the Magura
rim brakes. Have them build you a custom braided crossover. They can
mix and match fitting sizes to get it all to work. So you can have a
plastic hose going from the brake lever to the brake and a braided
crossover hose.

The custom hydraulic hose and fittings from the bike shop should be
much less expensive than the Magura branded braided hose. It probably
won't be as flexible as the Magura branded hose, but it will be
flexible enough, and stronger and more kink resistant than the plastic
hose.

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Jess,

Make sure you give us a follow up as to how your creative mod has
worked out.

john_childs said:

Dealing with the fittings sizes for switching to a braided line
cross-over is tricky. .

John,

My last experience with a bike shop was not good when i changed over
from the plastic lines to the braided lines. It was the beginning of
the end of my brakes.

I have since replaced the old brakes entirely and am now using an
almost new replacement magura brake (HS33) with plastic lines. I want
to go back to the braided lines mainly for durability.

Can you tell me if I can just swap out the plastic lines and fittings
and just replace it with the braided crossover and main lines? Do I
need olives or anything for the braided lines?

The braided lines were originally bought from UDC two years ago in a
kit that they offered. So, I think all I need to do is remove the
plastic lines with connectors to the brakes and then just thread the
braided lines into the brakes - right? Finally, refill with Magura
blood.

I am debating whether or not to make the change before California
Mountain Unicycling Weekend or run with what I have. The brakes work
great right now, almost hate to tinker with them.

thanks

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teachndad said:

Can you tell me if I can just swap out the plastic lines and fittings
and just replace it with the braided crossover and main lines? Do I
need olives or anything for the braided lines?

The braided lines were originally bought from UDC two years ago in a
kit that they offered. So, I think all I need to do is remove the
plastic lines with connectors to the brakes and then just thread the
braided lines into the brakes - right? Finally, refill with Magura
blood.

I am debating whether or not to make the change before California
Mountain Unicycling Weekend or run with what I have. The brakes work
great right now, almost hate to tinker with them.

If you switch out both the brake lever hose and the cross-over hose at
the same time to Magura braided hose you'll be fine. It's the mix and
matching plastic hose with braided hose that gets complicated.

The braided hose is all different fittings than the plastic hose. The
braided hose does not use olives. The fittings are completely
different.

When replacing the hose just pay attention to the fitting sizes and
thread pitch. Make sure you put the correct size fitting in the
correct size hole.

You can use 'Finish Line Shock Oil #5'
(http://www.finishlineusa.com/products/shock-oil.htm) instead of Magura
oil. It's cheaper and easier to get. See 'The Magura Cult'
(http://www.execulink.com/~dtierney/wmc/Magura/contents.htm) pages on
rim brake setup for more info. The Magura Cult is where the
recommendation to use the Finish Line Shock Oil is from.

Then you'll need a bleeding kit. It's a big syringe with a short
section of hose attached and a fitting at the end. You might be able
to use an old piece of hose (with fitting attached) from your old
brake. Then it's a challenge to find a suitable large syringe. Maybe
a bike shop will be able to point you in the right direction. I have
the Magura bleeding kit and didn't roll my own setup.

If you have never bled brakes before it will probably take you two or
three tries before you get it right with no air in the line.

You can download the 'Magura tech manuals'
(http://www.magura.com/7thsenseCMS/index.php?id=80&L=1). They'll tell
you what you need to know for installing the braided line. There is a
tech manual listed as 'How to install the braided hose'
(http://tinyurl.com/pxfv4) along with some other good tech manuals.

The Magura Cult pages have all the info you'll need for how to bleed
them and make sure there's no air in the line.

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Quoted message said:

You can use Finish Line Shock Oil #5 instead of Magura oil

mineral oil and watter also work (dont get the watter to cold)

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unicyclepa said:

mineral oil and watter also work (dont get the watter to cold)

Mineral oil is not ideal. Here is what The Magura Cult says about
using mineral oil:

Quoted message said:

Emergency oil substitutes -
Cooking Oil will get rancid and changes viscosity. Mineral Oil from the
Supermarket is also not a good substitute. You never know what
viscosity that stuff has. Mostly a weight of 30 is sold but again,
nobody knows for sure, because of the different measurements in
viscosity. For emergency work in the middle of nowhere cooking oil, or
mineral oil will work....so does water but it all really needs to be
flushed later.

Probably the best emergency alternative is Sewing machine oil. It is
available even in so-called third world countries.

Use an oil that you know the viscosity of and that you know won't
damage any seals in the brake. 30 weight mineral oil is going to be
too thick. The brake will be sluggish. Finish Line 5 weight shock oil
(for the front fork of mountain bikes) is easy to find at bicycle
shops. No need to experiment with mineral oil from the supermarket.

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sorey jc but im going to have to disagree with you on this one you would
never know the difrence with mineral oil. Ask aney trials biker they
will tell you the same thing. In my trials bike magoras I run mineral
oil in the winter and watter in the summer. mineral oil is cheap and
easey to get and works exactly the same as magora blood, magora just
dosint want you to know that

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john,

Thanks very much for the detailed response. It is extremely helpful
and I know anyone ever going through researching this topic will find
your response equally thorough and helpful.🙂

Cheers!

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Here is the whole section on hydraulic oil from the Magura Cult:

Quoted message said:

Hydraulic oil
Magura Oil, which is filled into the brakes in Germany is greenish -
Shell Naturelle. Unfortunately Shell USA doesn't sell (import) that
same stuff. Shell USA says that this (environmental friendly) oil is
too expensive for the American market. Magura USA could get it in a
special load (a boat load?) but it probably would last to the year
3000.

Magura USA searched high and low and ended up with Finish Line Shock
Oil No 5, which is actually a mineral based synthetic oil and is of a
reddish colour. Finish line shock oil is also environmental friendly
and if you can trust the folks at Shell, it will mix with the original
Shell stuff. It also has a better lubrication value than even the
original German Shell.

So....all brakes are filled in Germany with Shell Naturelle. All Oil in
the bleedkits and separate oil bottles available from Magura USA is
Finish Line No. 5 Shock Oil.

The viscosity or weight is measured in different ways in Europe and in
the USA (figures!) but the original Shell Stuff is about 8 weight. The
Finish Line again is 5. ( The smaller the number the thinner it is)

In case of extreme low temps, Finish Line No 2.5 weight is a
temporarily accepted fix. It will make the brake levers return
faster. Also 2.5 weight is Thorsten's personal choice for the rear
Louise Disc brake.

(Mike's comment: would the brakes tend to leak if using the thinner oil
in warmer weather?)

Emergency oil substitutes -
Cooking Oil will get rancid and changes viscosity. Mineral Oil from the
Supermarket is also not a good substitute. You never know what
viscosity that stuff has. Mostly a weight of 30 is sold but again,
nobody knows for sure, because of the different measurements in
viscosity. For emergency work in the middle of nowhere cooking oil, or
mineral oil will work....so does water but it all really needs to be
flushed later.

Probably the best emergency alternative is Sewing machine oil. It is
available even in so-called third world countries.

NEVER use DOT (Car/Motorcycle) Brake fluid. It will destroy the seals.
DOT brake fluid will attract water which makes the boiling point go
down quick. (That's why the folks with "other" disc brakes have to
change the stuff every year or two). And it is environmental a
disaster. Not to mention that it will eat paint for breakfast and the
real damage it can do to Carbon and other frame materials is widely
unknown)

Make of that what you will. I would not use water. It has no
lubrication and if you leave the water in during Winter it could freeze
and break the brake.

The Finish Line oil is reasonably priced. About $14 for 16oz. That is
enough to completely flush the brake many times. More than enough for
a unicyclist for several years or more.

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This is all good stuff. Thanks for the post Jess with the detailed
photos. Since I got to see the setup last weekend I can tell you guys
that Jess's die-knob came out great. Here's hoping it will work
perfectly all through CMW!

---Nathan

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I broke my main line a little while ago and have a triathlon on sunday.
I want my break for the race but none of the bike shops here in PA or
any of the ones in Saskatoon have Magura break line or olives.

Would using plastic tubing like that work for the main line? Is the
connection the same as on the crossovers?

Thanks

ERIC

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