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SI-8ED0A-002-00
General Safety Information
WARNING
– To avoid serious injuries:
• Improper use of your bicycle's brake system may result in a loss
of control or an accident, which could lead to a severe injury.
Because each bicycle may handle differently, be sure to learn the
proper braking technique (including brake lever pressure and
bicycle control characteristics) for your bicycle.
Consult your bicycle dealer and the bicycle's owners manual, and
practice your riding and braking technique.
• If the front brake is applied too strongly, the wheel may lock and
the bicycle may fall forward, and serious injury may result.
• Brakes designed for use as rear brakes should not be used as
front brakes.
• Obtain and read the service instructions carefully prior to
installing the parts. Loose, worn or damaged parts may cause
the bicycle to fall over and serious injury may occur as a result.
We strongly recommend only using genuine Shimano replacement
parts.
• Be careful not to allow any oil or grease to get onto the brake
shoes. If any oil or grease do get on the shoes, you should
replace the shoes, otherwise the brakes may not work correctly.
• Check the brake cable for rust and fraying, and replace the cable
immediately if any such problems are found. If this is not done, the
brakes may not work correctly.
• Always make sure that the brakes are working correctly before
you ride the bicycle.
• The required braking distance will be longer during wet weather.
Reduce your speed and apply the brakes early and gently.
• If the road surface is wet, the tires will skid more easily. If the tires
skid, you may fall off the bicycle. To avoid this, reduce your speed
and apply the brakes early and gently.
• Read these Technical Service Instructions carefully, and keep
them in a safe place for later reference.
Shimano BR-MX70 Safety Information
WARNING
– To avoid serious injuries:
Use the BR-MX70 V-BRAKE brake with V-BRAKE brake-
compatible brake levers such as the BL-MX70 brake levers.
Note
• The BR-MX70 V-BRAKE brake can only be used as a rear brake.
• The optimum efficiency of the Multi-Condition Brake System can
be realized by using the brakes and brake levers in the
recommended set.
• If the brake shoes have worn down until the grooves are no longer
visible, they should be replaced.
• Different brake shoes have their own characteristics. Ask the place
of purchase for details when purchasing the brake shoes.
• Parts are not guaranteed against natural wear or deterioration
resulting from normal use.
• For maximum performance we highly recommend Shimano
lubricants and maintenance products.
• For any questions regarding methods of handling or maintenance,
please contact the place of purchase.
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan
* Service Instructions in further languages are available at :
http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice. (English)
© Sep. 2010 by Shimano Inc. XBC IZM Printed in Malaysia.
Technical Service
Instructions
Multi-Condition
Brake System
Multi-Condition Brake System
By providing superior wet weather braking performance
(control and modulation), braking performance will not
vary in a multitude of conditions when using this brake
system.
In order to realize the best performance, we
recommend that the following combination be
used.
Series
BL-MX70
Brake lever
BR-MX70
V-BRAKE brake
Brake cable
Installation of the brake lever
Use a 5 mm Allen key to install the brake lever.
Tightening torque:
6 – 8 N·m {52 – 69 in. lbs.}
Use a handlebar grip
with a maximum outer
diameter of 32 mm.
When installing the components to carbon frame/handle bar
surfaces, verify with the manufacturer of the carbon
frame/parts for their recommendation on tightening torque
in order to prevent over tightening that can cause damage
to the carbon material and/or under tightening that can
cause lack of fixing strength for the components.
Installation of the V-BRAKE brake
1.
Insert the stopper pin of the brake body into the center
spring hole in the frame mounting boss, and then secure
the brake body to the frame with the link fixing bolt.
Tightening torque:
5 – 7 N·m
{43 – 61 in. lbs.}
5 mm Allen key
Link fixing bolt
Spring hole
Stopper pin
2.
While holding the shoe against the rim, adjust the
amount of shoe protrusion by changing over the washer
B (thick or thin) so that dimension A is kept at 32 mm or
more.
32 mm or more
A
Washer B (thick)
Washer B (thin)
Shoe fixing nut
Washer
Washer A
Washer A
Shoe fixing link
3.
While holding the shoe against the rim, tighten the shoe
fixing nut.
SI-8ED0A-002
1 mm
4.
Pass the inner cable through the inner cable lead, and
after setting so that the total of the clearances between
the left and right shoes and the rim is 2 mm, tighten the
DXR
cable fixing bolt.
Inner cable lead
5 mm Allen key
B C
B + C = 2 mm
5.
Adjust the balance with the spring tension adjustment
screws.
Spring tension
adjustment screw
2
6.
Depress the brake lever about 10 times as far as the grip
and check that everything is operating correctly and that
the shoe clearance is correct before using the brakes.
Replacement of the cartridge shoe
1.
Remove the shoe fixing pin, and then slide the shoe
along the groove to remove it from the shoe holder.
2.
There are two different types of shoe and shoe holder to
be used in the left and right positions respectively. Slide
the new shoes into the grooves on the shoe holders
while taking note of the correct directions and pin hole
positions.
For the left
Front
Shoe
Shoe holder
Shoe fixing pin
3.
Insertion of shoe fixing pin is very critical to keep shoe
properly fixed in place.
5 mm Allen key
Tightening torque:
6 – 8 N·m {52 – 69 in. lbs.}
5 mm Allen key
Tightening torque:
6 – 8 N·m {52 – 69 in. lbs.}
2
1
Spring tension
adjustment screw
1
1
2
1 mm
1 mm
Depress about
10 times
Shoe fixing pin
Shoe
For the right
Front
Shoe
Shoe holder
Shoe
insertion
direction
Shoe fixing pin
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