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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.
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 serious
injury to the rider. 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 front and rear 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.
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.
Please note: Specifications are subject to change for improvement without notice. (English)
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, Osaka 590-8577, Japan
Apr. 2006 by Shimano Inc. PIT. IZM. Printed in Malaysia
C
Multi-Condition
Brake System
Technical Service Instructions
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.
DXR
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:
Use a handlebar grip
6 – 8 N·m {52 – 69 in. lbs.}
with a maximum outer
diameter of 32 mm.
In the case of carbon
handlebars, it may be
necessary to lower the
tightening torque in order to
prevent damage to the
handlebar. Please consult
the bicycle or handlebar
manufacturer regarding the
appropriate level of
tightening torque for
carbon handlebars.
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)
Washer
Washer A
Washer A
Shoe fixing link
3.
SI-8ED0A
While holding the shoe against the rim, tighten the shoe
fixing nut.
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 cable fixing bolt.
Inner cable lead
B C
5 mm Allen key
B + C = 2 mm
5.
Adjust the balance with the spring tension adjustment
screws.
Spring tension
adjustment screw
2
1
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 nut
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
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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