Magura JULIE hp Instruction manual

THE PASSION PEOPLE
www.magura.com
THE PASSION PEOPLE
WORKSHOP 2009
English

2
THE PASSION PEOPLE
www.magura.com
THE PASSION PEOPLE
www.magura.com
THE PASSION PEOPLE
www.magura.com
FREERIDE ENDURO ALL MOUNTAIN X C RACE
Gustav MGustav M
Marta SL 180/180Marta SL 180/180
Marta SL 203/203Marta SL 203/203
Marta SL Magnesium 203/203Marta SL Magnesium 203/203
Marta SL Magnesium 180/180Marta SL Magnesium 180/180
Marta SL Magnesium 160/160Marta SL Magnesium 160/160Marta SL Magnesium 160/160
Marta SL 160/160Marta SL 160/160
Marta 160/160Marta 160/160
Louise 203/203Louise 203/203
Louise 180/180Louise 180/180
Louise 160/160Louise 160/160
Julie HP 203/203Julie HP 203/203
Julie HP 180/180Julie HP 180/180
Julie HP 160/160Julie HP 160/160
Marta 180/180Marta 180/180
Marta 203/203Marta 203/203
X - COUNTRY
Our disc brake range | recommended use
Ground contact
isn’t that important
to you. There is
(almost), no terrain
where a Freerider
won’t go. Tough and
stable components
are amust have.
Here they are.
There are bikers out
therefor whom
uphill is just a
means to an end.
The downhill fun is
having absolute
priority for them.
With lots of travel
and robust compo-
nents the Enduros
must cope with
technically hairy
downhills and bike-
park weekends..
You’re an all-roun-
der. You love long
and sweeping trails,
up as well as down.
The optimummix of
light weight and
stability is the hall
mark of your All
Mountain compo-
nents meant for
abroad spectrum of
use.
Mile after mile over
the dusty trails as
well ashard fast tar-
mac. On every ride
your bike shouldbe
the epitome of
uncomplicated –
and naturally the
parts for your X-
country adventures
shouldn’t cost the
earth.
Race-orientated
means for us the
minimum weight
that is technically
possible. Every
gram extra weight
can be the decisive
factor between win-
ning or losing for
you, the racer
maniac.
Specifications subject to change
without prior notice

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3
1. Introduction 4
2. Safety instructions before the first ride 5
3. Safety instructions before every ride 5-6
4. Transport of the bicycle 6
5. Brake installation 7-10
6. Shortening the hose 10-11
7. Maintenance 12-13
8. Repairs 14
9. Bleeding and Filling 15-16
10. The disc brake wheel 17
11. Accessories 18
12. Warranty 18
13. Trouble Shooting 19
14. Spare parts, tuning adaptors 20-21
Table of Contents
WARNING:
This symbol means possible danger for your health and even life if you do not follow the
instructions given respectively if the necessary safety measures are not followed.
ATTENTION:
This symbol warns you of inappropriate handling that might cause serious damage to the
material and/ or the environment.
NOTE:
This symbol gives you additional information about the general handling of the
product or gives hints to paragraphs in this manual which have to be read carefully.

THE PASSION PEOPLE
www.magura.com 4
1. Welcome to the Passion People!
On the fully hydraulic MAGURA disc brake system Julie HP the braking force is transmit-
ted to the braking surface by a mineral oil column. The movement of the lever blade moves
a piston, which is integrated in the brake lever (master cylinder). The piston pushes the
mineral oil column through the brake hose in the direction of the brake calliper, where two
pistons, on which the brake pads are fixed, are pushed out. The friction between the brake
pads and the rotor slows down the bicycle and causes both the rotor and the brake calliper
to heat up.
Never touch either the rotor or the brake calliper after long braking as this may
cause serious burns.
You will be pleased to find out that the MAGURA Julie HP disc brakes offer a superior
braking power even with little hand force applied, no matter what the weather conditions
should be. Particularly in wet weather conditions disc brakes are much more responsive
than rim brakes and transmit their enormous power immediately after activating the brake
lever.
Disc brakes dont’t wear your rims down. However, if they have been mounted incorrectly,
they might cause a squealing noise during braking, mainly during wet weather conditions.
This manual contains important information about the safe installation,
operation and maintenance of your MAGURA disc brake. We urge you to read
it carefully, become familiar with its contents and follow our recommendations to
help make your new braking experience enjoyable and trouble free. Please note that
the Louise brake is delivered in different versions with different rotor diameters and
for different fitting alternatives for which we offer a variety of adaptors. The basic
installations steps remain however always the same.
Although the Julie HP disc brake system is relatively simple you should not over-
estimate your technical skills! We therefore advise you to leave the following operati-
ons to a trained technician of a professional bike shop.
This manual is part of the product. Do not hand over the product to third parties
without this manual. Technical specs are subject to change without prior notice.
Should there be any further questions or problems we warmly recommend you to visit
our website www.magura.com where you will always find the newest and hottest tips about
all our products. On magura.com you can also download this manual in a
convenient A4 format, in the forum you get free support around the clock. Stay tuned with
the Passion People!
Thank you for your confidence in our products, enjoy your ride and your new
MAGURA disc stoppers!
Happy trails!
Brake lever (master cylinder)
MAGURA Julie HP
Brake calliper and rotor
MAGURA Julie HP
Congratulations! You have purchased a fully
hydraulic MAGURA disc brake proudly
„Made in Germany“. You will be amazed at
the awesome braking power and the mini-
mum amount of maintenance that is neces-
sary on our stoppers. Good to know that
you are not alone, millions of riders world-
wide rely on them and every day our num-
bers are increasing.

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1. Always make sure that the quick release skewers of your wheels and seat post are
correctly mounted and closed.
incorrectly installed quick release skewers might cause the fixed items to beco-
me loose. Serious accidents with severe injury may result!!
2. Always make sure that the brake lever pressure is o.k. by pulling the lever blade and
ensuring that full braking performance is achieved before the lever blade touches the hand-
lebars. If this is not the case, pull the lever blade several times (pump) until the brake pads
touch the rotor.
Changing pressure points during a ride might be the result of having air in the brake
system.
See hints about filling and bleeding from on pages 15/16.
5
Always check carefully the following points:
1. Are you already familiar with hydraulic disc brakes? Our brakes might be much more
powerful than the stoppers on which you relied on so far.
Take your bicycle to a safe area to learn the proper braking technique and operation of your
new brakes and your bike.
2. Check that the fornt brake is still actuated by the lever on the side your are
used to braking with. Should this not be the case you wll have to train to your new
setup, otherwise any unintended front wheel braking manoeuvre may cause an acci-
dent leading to possible serious injury! If in doubt get a trained technician to swap
the hoses. For further hints concerning swapping of the brake hose see page 10
onwards.
3. New brakes and new rotors or brake pads must always be run in by
braking at least 30 times from a speed of 30 km/h to achieve the maximum brake
power. Take your bike to a safe place to run in the brake.
4. While riding in extreme riding conditions (total weight of bike plus rider
over 100 kg and/ or a gradient of more than 15 %) always use both brakes simulta-
neously to slow your bike down.
5. Use your Julie HP disc brake according o the user chart on page 2 of this
manual. Any misuse might cause serious accidents with fatal injuries to yourself and
others!
6. Are you familiar with the other components on your bike such as gears, clipless
pedals and suspension units? Always practise using your bike in a safe area to improve your
handling abilities before using it on the road. Consult the user’s manual of your bike to learn
more about this.
7. For your own safety always wear a helmet when you ride a bicycle. Make sure as well
that you wear suitable clothing and footwear.
2. Before the first ride
3. Before every ride